Patent
US 10,464,044HIGH CAPACITY REGENERABLE GRAPHENE-BASED SORBENT
Codruta Maria Zoican-Loebick
US
Copyright © 2026 Matter42. All rights reserved.
Patent
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Patent
US 10,464,044Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
FIG. 2 depicts a graph of formaldehyde break-through as a function of time for the zeolite Y comparative sorbent, which was the best of the comparative …
FIG. 3 depicts graphs of formaldehyde break-through as a function of time for an embodiment of the process of this invention cycled through four …
FIG. 4 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
FIG. 5 depicts graphs of formaldehyde desorption as a function of time for an embodiment of the functionalized graphene sorbent of this invention, as observed …
FIG. 6, approximately the same capacity was measured at 40 percent relative humidity (0.0.25 mmol/g sorbent) as compared with the 10 percent relative humidity …
FIG. 7. In cycle 1, as shown in
FIG. 8 depicts a graph of toluene breakthrough as a function of time for an embodiment of the process of this invention. DETAILED DESCRIPTION OF THE INVENTION …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A process of removing a volatile organic compound from a gaseous feedstream, comprising contacting the gaseous feedstream comprising an initial concentration of the volatile organic compound with a sorbent under adsorption conditions sufficient to produce an effluent stream comprising a reduced concentration of the volatile organic compound, as compared with the initial concentration; wherein the sorbent comprises a functionalized graphene prepared by a process comprising reacting graphene oxide with an amine of the formula NHR 2, wherein each R is independently selected from the group consisting of hydrogen, C 1 _ 5 alkyl, and C 1 _ aminoalkyl, the reacting occurring under conditions sufficient to produce the functionalized graphene. Withdrawn
A process of removing a volatile organic compound from a gaseous feedstream, comprising contacting the gaseous feedstream comprising an initial concentration of the volatile organic compound with a sorbent under conditions sufficient to produce an effluent stream comprising a reduced concentration of the volatile organic compound, as compared with the initial concentration; the sorbent comprising a nitrogen and oxygen-functionalized graphene prepared by a process comprising contacting graphene oxide with an amine of the formula NHR 2, wherein each R is independently selected from the group consisting of hydrogen, C 1-5 alkyl, and C 1-5 aminoalkyl, the contacting occurring in the absence of a carbon nanotube and occurring under reaction conditions sufficient to produce the nitrogen and oxygen- functionalized graphene. Withdrawn
The process of Claim 2 wherein the gaseous feedstream comprises air, and the volatile organic compound is an odoriferous compound, or irritant, or pollutant or contaminant in a concentration greater than 10 ppb V and less than 100 ppm V. Withdrawn
The process of Claim 2 wherein the gaseous feedstream comprises a waste gas stream from an industrial process, and wherein the volatile organic compound has a concentration in the waste gas stream of greater than 500 ppm V and less than 10,000 ppm V. Withdrawn
The process of Claim 2 wherein the volatile organic compound is a polar volatile organic compound having a dipole moment equal to or greater than 0. 8D. Withdrawn
The process of Claim 2 wherein the volatile organic compound is selected from C 1-8 oxy-substituted hydrocarbons and C 1-8 halocarbons. Withdrawn
The process of Claim 2 wherein the amine reacting with the graphene oxide is aqueous ammonia (ammonium hydroxide). Withdrawn
The process of Claim 2 wherein the contacting of the gaseous feedstream with the sorbent is conducted at a temperature ranging from 5 ° C to 50 ° C and a pressure ranging from 1 atm (101 kPa) to 5 atm (506 kPa). Withdrawn
The process of Claim 2 wherein the gaseous feedstream further comprises carbon dioxide. Withdrawn
The process of Claim 2 wherein the gaseous feedstream has a relative humidity ranging from 0 percent to less than 80 percent. Withdrawn
The process of Claim 2 wherein after the sorbent is saturated or partially saturated with the volatile organic compound, the process further comprises the step of desorbing the volatile organic compound; and thereafter the steps of adsorbing and desorbing are reiterated one or more times. Withdrawn
The process of Claim 2 wherein the desorbing is effected by heating the sorbent, or by exposing the sorbent to a pressure gradient, or by passing a sweep gas through the sorbent. Withdrawn
The process of Claim 2 wherein the contacting is conducted in a single fixed sorbent bed or conducted in a plurality of sorbent beds operating in swing mode. Withdrawn
The process of Claim 2 wherein the sorbent is supported on a metal mesh substrate having an ultra-short-channel-length. Withdrawn
The process of Claim 2 wherein the effluent stream comprises air or a waste gas stream containing a volatile organic compound in a concentration less than 50 ppm v. Withdrawn
A sorbent composition comprising a nitrogen and oxygen-functionalized graphene prepared by a method comprising reacting graphene oxide with an amine of the formula NHR 2 wherein each R is independently selected from the group consisting of hydrogen, C 1-5 alkyl, and C 1-5 aminoalkyl, the reacting occurring in the absence of a carbon nanotube and occurring under process conditions sufficient to prepare the nitrogen and oxygen-functionalized graphene, wherein oxygen is present in the graphene oxide in a concentration greater than 5 percent and less than 40 percent by weight of which carboxyl functionality represents from 30 to 100 percent by weight of the total oxygen. Currently amended
The sorbent composition of Claim 18 wherein the amine is aqueous ammonia (ammonium hydroxide). Original
The sorbent composition of Claim 18 wherein the amine is reacted with the graphene oxide at a temperature between 50 ° C and 120 ° C for a time from about 1 hour to about 48 hours. Original
The sorbent composition of Claim 18 wherein in the preparation method from greater than percent to essentially 100 percent of oxygen-containing substituents on the graphene oxide are converted to nitrogen-containing substituents. Original
The sorbent composition of Claim 18 wherein the nitrogen and oxygen- functionalized graphene has a surface area ranging from about 100 m 2/g to about 1,000 m 2/g. Currently amended
The sorbent composition of Claim 18 wherein the sorbent is supported on a metal mesh substrate having an ultra-short channel length. Original
The sorbent composition of Claim 18 being capable of regeneration at a temperature ranging from 22 ° C to 50 ° C,, whereby with each regeneration cycle recovering more than 50 percent of sorbent capacity. Currently amended
An HVAC system comprising the sorbent composition of Claim 18. Original
A stand-alone air purification system comprising the sorbent composition of Claim 18. Original
An industrial sorbent bed comprising the sorbent composition of Claim 18. Original
The sorbent composition of Claim 18, wherein the amine attaches to the functionalized graphene through amide functionalities. New
The sorbent composition of Claim 18, wherein the graphene oxide is refluxed with the amine and the amine is replenished as needed during reflux. New
Materials described outside the worked examples.
graphene oxide
amine NHR₂
NHR₂
nitrogen and oxygen-functionalized graphene
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Surface Area | 100–1000 m2/g | nitrogen and oxygen-functionalized graphene |
Thickness | 2–3 nm |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,464,044Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
FIG. 2 depicts a graph of formaldehyde break-through as a function of time for the zeolite Y comparative sorbent, which was the best of the comparative …
FIG. 3 depicts graphs of formaldehyde break-through as a function of time for an embodiment of the process of this invention cycled through four …
FIG. 4 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
FIG. 5 depicts graphs of formaldehyde desorption as a function of time for an embodiment of the functionalized graphene sorbent of this invention, as observed …
FIG. 6, approximately the same capacity was measured at 40 percent relative humidity (0.0.25 mmol/g sorbent) as compared with the 10 percent relative humidity …
FIG. 7. In cycle 1, as shown in
FIG. 8 depicts a graph of toluene breakthrough as a function of time for an embodiment of the process of this invention. DETAILED DESCRIPTION OF THE INVENTION …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A process of removing a volatile organic compound from a gaseous feedstream, comprising contacting the gaseous feedstream comprising an initial concentration of the volatile organic compound with a sorbent under adsorption conditions sufficient to produce an effluent stream comprising a reduced concentration of the volatile organic compound, as compared with the initial concentration; wherein the sorbent comprises a functionalized graphene prepared by a process comprising reacting graphene oxide with an amine of the formula NHR 2, wherein each R is independently selected from the group consisting of hydrogen, C 1 _ 5 alkyl, and C 1 _ aminoalkyl, the reacting occurring under conditions sufficient to produce the functionalized graphene. Withdrawn
A process of removing a volatile organic compound from a gaseous feedstream, comprising contacting the gaseous feedstream comprising an initial concentration of the volatile organic compound with a sorbent under conditions sufficient to produce an effluent stream comprising a reduced concentration of the volatile organic compound, as compared with the initial concentration; the sorbent comprising a nitrogen and oxygen-functionalized graphene prepared by a process comprising contacting graphene oxide with an amine of the formula NHR 2, wherein each R is independently selected from the group consisting of hydrogen, C 1-5 alkyl, and C 1-5 aminoalkyl, the contacting occurring in the absence of a carbon nanotube and occurring under reaction conditions sufficient to produce the nitrogen and oxygen- functionalized graphene. Withdrawn
The process of Claim 2 wherein the gaseous feedstream comprises air, and the volatile organic compound is an odoriferous compound, or irritant, or pollutant or contaminant in a concentration greater than 10 ppb V and less than 100 ppm V. Withdrawn
The process of Claim 2 wherein the gaseous feedstream comprises a waste gas stream from an industrial process, and wherein the volatile organic compound has a concentration in the waste gas stream of greater than 500 ppm V and less than 10,000 ppm V. Withdrawn
The process of Claim 2 wherein the volatile organic compound is a polar volatile organic compound having a dipole moment equal to or greater than 0. 8D. Withdrawn
The process of Claim 2 wherein the volatile organic compound is selected from C 1-8 oxy-substituted hydrocarbons and C 1-8 halocarbons. Withdrawn
The process of Claim 2 wherein the amine reacting with the graphene oxide is aqueous ammonia (ammonium hydroxide). Withdrawn
The process of Claim 2 wherein the contacting of the gaseous feedstream with the sorbent is conducted at a temperature ranging from 5 ° C to 50 ° C and a pressure ranging from 1 atm (101 kPa) to 5 atm (506 kPa). Withdrawn
The process of Claim 2 wherein the gaseous feedstream further comprises carbon dioxide. Withdrawn
The process of Claim 2 wherein the gaseous feedstream has a relative humidity ranging from 0 percent to less than 80 percent. Withdrawn
The process of Claim 2 wherein after the sorbent is saturated or partially saturated with the volatile organic compound, the process further comprises the step of desorbing the volatile organic compound; and thereafter the steps of adsorbing and desorbing are reiterated one or more times. Withdrawn
The process of Claim 2 wherein the desorbing is effected by heating the sorbent, or by exposing the sorbent to a pressure gradient, or by passing a sweep gas through the sorbent. Withdrawn
The process of Claim 2 wherein the contacting is conducted in a single fixed sorbent bed or conducted in a plurality of sorbent beds operating in swing mode. Withdrawn
The process of Claim 2 wherein the sorbent is supported on a metal mesh substrate having an ultra-short-channel-length. Withdrawn
The process of Claim 2 wherein the effluent stream comprises air or a waste gas stream containing a volatile organic compound in a concentration less than 50 ppm v. Withdrawn
A sorbent composition comprising a nitrogen and oxygen-functionalized graphene prepared by a method comprising reacting graphene oxide with an amine of the formula NHR 2 wherein each R is independently selected from the group consisting of hydrogen, C 1-5 alkyl, and C 1-5 aminoalkyl, the reacting occurring in the absence of a carbon nanotube and occurring under process conditions sufficient to prepare the nitrogen and oxygen-functionalized graphene, wherein oxygen is present in the graphene oxide in a concentration greater than 5 percent and less than 40 percent by weight of which carboxyl functionality represents from 30 to 100 percent by weight of the total oxygen. Currently amended
The sorbent composition of Claim 18 wherein the amine is aqueous ammonia (ammonium hydroxide). Original
The sorbent composition of Claim 18 wherein the amine is reacted with the graphene oxide at a temperature between 50 ° C and 120 ° C for a time from about 1 hour to about 48 hours. Original
The sorbent composition of Claim 18 wherein in the preparation method from greater than percent to essentially 100 percent of oxygen-containing substituents on the graphene oxide are converted to nitrogen-containing substituents. Original
The sorbent composition of Claim 18 wherein the nitrogen and oxygen- functionalized graphene has a surface area ranging from about 100 m 2/g to about 1,000 m 2/g. Currently amended
The sorbent composition of Claim 18 wherein the sorbent is supported on a metal mesh substrate having an ultra-short channel length. Original
The sorbent composition of Claim 18 being capable of regeneration at a temperature ranging from 22 ° C to 50 ° C,, whereby with each regeneration cycle recovering more than 50 percent of sorbent capacity. Currently amended
An HVAC system comprising the sorbent composition of Claim 18. Original
A stand-alone air purification system comprising the sorbent composition of Claim 18. Original
An industrial sorbent bed comprising the sorbent composition of Claim 18. Original
The sorbent composition of Claim 18, wherein the amine attaches to the functionalized graphene through amide functionalities. New
The sorbent composition of Claim 18, wherein the graphene oxide is refluxed with the amine and the amine is replenished as needed during reflux. New
Materials described outside the worked examples.
graphene oxide
amine NHR₂
NHR₂
nitrogen and oxygen-functionalized graphene
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Surface Area | 100–1000 m2/g | nitrogen and oxygen-functionalized graphene |
Thickness | 2–3 nm |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,464,044Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
FIG. 2 depicts a graph of formaldehyde break-through as a function of time for the zeolite Y comparative sorbent, which was the best of the comparative …
FIG. 3 depicts graphs of formaldehyde break-through as a function of time for an embodiment of the process of this invention cycled through four …
FIG. 4 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
FIG. 5 depicts graphs of formaldehyde desorption as a function of time for an embodiment of the functionalized graphene sorbent of this invention, as observed …
FIG. 6, approximately the same capacity was measured at 40 percent relative humidity (0.0.25 mmol/g sorbent) as compared with the 10 percent relative humidity …
FIG. 7. In cycle 1, as shown in
FIG. 8 depicts a graph of toluene breakthrough as a function of time for an embodiment of the process of this invention. DETAILED DESCRIPTION OF THE INVENTION …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A process of removing a volatile organic compound from a gaseous feedstream, comprising contacting the gaseous feedstream comprising an initial concentration of the volatile organic compound with a sorbent under adsorption conditions sufficient to produce an effluent stream comprising a reduced concentration of the volatile organic compound, as compared with the initial concentration; wherein the sorbent comprises a functionalized graphene prepared by a process comprising reacting graphene oxide with an amine of the formula NHR 2, wherein each R is independently selected from the group consisting of hydrogen, C 1 _ 5 alkyl, and C 1 _ aminoalkyl, the reacting occurring under conditions sufficient to produce the functionalized graphene. Withdrawn
A process of removing a volatile organic compound from a gaseous feedstream, comprising contacting the gaseous feedstream comprising an initial concentration of the volatile organic compound with a sorbent under conditions sufficient to produce an effluent stream comprising a reduced concentration of the volatile organic compound, as compared with the initial concentration; the sorbent comprising a nitrogen and oxygen-functionalized graphene prepared by a process comprising contacting graphene oxide with an amine of the formula NHR 2, wherein each R is independently selected from the group consisting of hydrogen, C 1-5 alkyl, and C 1-5 aminoalkyl, the contacting occurring in the absence of a carbon nanotube and occurring under reaction conditions sufficient to produce the nitrogen and oxygen- functionalized graphene. Withdrawn
The process of Claim 2 wherein the gaseous feedstream comprises air, and the volatile organic compound is an odoriferous compound, or irritant, or pollutant or contaminant in a concentration greater than 10 ppb V and less than 100 ppm V. Withdrawn
The process of Claim 2 wherein the gaseous feedstream comprises a waste gas stream from an industrial process, and wherein the volatile organic compound has a concentration in the waste gas stream of greater than 500 ppm V and less than 10,000 ppm V. Withdrawn
The process of Claim 2 wherein the volatile organic compound is a polar volatile organic compound having a dipole moment equal to or greater than 0. 8D. Withdrawn
The process of Claim 2 wherein the volatile organic compound is selected from C 1-8 oxy-substituted hydrocarbons and C 1-8 halocarbons. Withdrawn
The process of Claim 2 wherein the amine reacting with the graphene oxide is aqueous ammonia (ammonium hydroxide). Withdrawn
The process of Claim 2 wherein the contacting of the gaseous feedstream with the sorbent is conducted at a temperature ranging from 5 ° C to 50 ° C and a pressure ranging from 1 atm (101 kPa) to 5 atm (506 kPa). Withdrawn
The process of Claim 2 wherein the gaseous feedstream further comprises carbon dioxide. Withdrawn
The process of Claim 2 wherein the gaseous feedstream has a relative humidity ranging from 0 percent to less than 80 percent. Withdrawn
The process of Claim 2 wherein after the sorbent is saturated or partially saturated with the volatile organic compound, the process further comprises the step of desorbing the volatile organic compound; and thereafter the steps of adsorbing and desorbing are reiterated one or more times. Withdrawn
The process of Claim 2 wherein the desorbing is effected by heating the sorbent, or by exposing the sorbent to a pressure gradient, or by passing a sweep gas through the sorbent. Withdrawn
The process of Claim 2 wherein the contacting is conducted in a single fixed sorbent bed or conducted in a plurality of sorbent beds operating in swing mode. Withdrawn
The process of Claim 2 wherein the sorbent is supported on a metal mesh substrate having an ultra-short-channel-length. Withdrawn
The process of Claim 2 wherein the effluent stream comprises air or a waste gas stream containing a volatile organic compound in a concentration less than 50 ppm v. Withdrawn
A sorbent composition comprising a nitrogen and oxygen-functionalized graphene prepared by a method comprising reacting graphene oxide with an amine of the formula NHR 2 wherein each R is independently selected from the group consisting of hydrogen, C 1-5 alkyl, and C 1-5 aminoalkyl, the reacting occurring in the absence of a carbon nanotube and occurring under process conditions sufficient to prepare the nitrogen and oxygen-functionalized graphene, wherein oxygen is present in the graphene oxide in a concentration greater than 5 percent and less than 40 percent by weight of which carboxyl functionality represents from 30 to 100 percent by weight of the total oxygen. Currently amended
The sorbent composition of Claim 18 wherein the amine is aqueous ammonia (ammonium hydroxide). Original
The sorbent composition of Claim 18 wherein the amine is reacted with the graphene oxide at a temperature between 50 ° C and 120 ° C for a time from about 1 hour to about 48 hours. Original
The sorbent composition of Claim 18 wherein in the preparation method from greater than percent to essentially 100 percent of oxygen-containing substituents on the graphene oxide are converted to nitrogen-containing substituents. Original
The sorbent composition of Claim 18 wherein the nitrogen and oxygen- functionalized graphene has a surface area ranging from about 100 m 2/g to about 1,000 m 2/g. Currently amended
The sorbent composition of Claim 18 wherein the sorbent is supported on a metal mesh substrate having an ultra-short channel length. Original
The sorbent composition of Claim 18 being capable of regeneration at a temperature ranging from 22 ° C to 50 ° C,, whereby with each regeneration cycle recovering more than 50 percent of sorbent capacity. Currently amended
An HVAC system comprising the sorbent composition of Claim 18. Original
A stand-alone air purification system comprising the sorbent composition of Claim 18. Original
An industrial sorbent bed comprising the sorbent composition of Claim 18. Original
The sorbent composition of Claim 18, wherein the amine attaches to the functionalized graphene through amide functionalities. New
The sorbent composition of Claim 18, wherein the graphene oxide is refluxed with the amine and the amine is replenished as needed during reflux. New
Materials described outside the worked examples.
graphene oxide
amine NHR₂
NHR₂
nitrogen and oxygen-functionalized graphene
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Surface Area | 100–1000 m2/g | nitrogen and oxygen-functionalized graphene |
Thickness | 2–3 nm |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,464,044Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
FIG. 2 depicts a graph of formaldehyde break-through as a function of time for the zeolite Y comparative sorbent, which was the best of the comparative …
FIG. 3 depicts graphs of formaldehyde break-through as a function of time for an embodiment of the process of this invention cycled through four …
FIG. 4 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
FIG. 5 depicts graphs of formaldehyde desorption as a function of time for an embodiment of the functionalized graphene sorbent of this invention, as observed …
FIG. 6, approximately the same capacity was measured at 40 percent relative humidity (0.0.25 mmol/g sorbent) as compared with the 10 percent relative humidity …
FIG. 7. In cycle 1, as shown in
FIG. 8 depicts a graph of toluene breakthrough as a function of time for an embodiment of the process of this invention. DETAILED DESCRIPTION OF THE INVENTION …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A process of removing a volatile organic compound from a gaseous feedstream, comprising contacting the gaseous feedstream comprising an initial concentration of the volatile organic compound with a sorbent under adsorption conditions sufficient to produce an effluent stream comprising a reduced concentration of the volatile organic compound, as compared with the initial concentration; wherein the sorbent comprises a functionalized graphene prepared by a process comprising reacting graphene oxide with an amine of the formula NHR 2, wherein each R is independently selected from the group consisting of hydrogen, C 1 _ 5 alkyl, and C 1 _ aminoalkyl, the reacting occurring under conditions sufficient to produce the functionalized graphene. Withdrawn
A process of removing a volatile organic compound from a gaseous feedstream, comprising contacting the gaseous feedstream comprising an initial concentration of the volatile organic compound with a sorbent under conditions sufficient to produce an effluent stream comprising a reduced concentration of the volatile organic compound, as compared with the initial concentration; the sorbent comprising a nitrogen and oxygen-functionalized graphene prepared by a process comprising contacting graphene oxide with an amine of the formula NHR 2, wherein each R is independently selected from the group consisting of hydrogen, C 1-5 alkyl, and C 1-5 aminoalkyl, the contacting occurring in the absence of a carbon nanotube and occurring under reaction conditions sufficient to produce the nitrogen and oxygen- functionalized graphene. Withdrawn
The process of Claim 2 wherein the gaseous feedstream comprises air, and the volatile organic compound is an odoriferous compound, or irritant, or pollutant or contaminant in a concentration greater than 10 ppb V and less than 100 ppm V. Withdrawn
The process of Claim 2 wherein the gaseous feedstream comprises a waste gas stream from an industrial process, and wherein the volatile organic compound has a concentration in the waste gas stream of greater than 500 ppm V and less than 10,000 ppm V. Withdrawn
The process of Claim 2 wherein the volatile organic compound is a polar volatile organic compound having a dipole moment equal to or greater than 0. 8D. Withdrawn
The process of Claim 2 wherein the volatile organic compound is selected from C 1-8 oxy-substituted hydrocarbons and C 1-8 halocarbons. Withdrawn
The process of Claim 2 wherein the amine reacting with the graphene oxide is aqueous ammonia (ammonium hydroxide). Withdrawn
The process of Claim 2 wherein the contacting of the gaseous feedstream with the sorbent is conducted at a temperature ranging from 5 ° C to 50 ° C and a pressure ranging from 1 atm (101 kPa) to 5 atm (506 kPa). Withdrawn
The process of Claim 2 wherein the gaseous feedstream further comprises carbon dioxide. Withdrawn
The process of Claim 2 wherein the gaseous feedstream has a relative humidity ranging from 0 percent to less than 80 percent. Withdrawn
The process of Claim 2 wherein after the sorbent is saturated or partially saturated with the volatile organic compound, the process further comprises the step of desorbing the volatile organic compound; and thereafter the steps of adsorbing and desorbing are reiterated one or more times. Withdrawn
The process of Claim 2 wherein the desorbing is effected by heating the sorbent, or by exposing the sorbent to a pressure gradient, or by passing a sweep gas through the sorbent. Withdrawn
The process of Claim 2 wherein the contacting is conducted in a single fixed sorbent bed or conducted in a plurality of sorbent beds operating in swing mode. Withdrawn
The process of Claim 2 wherein the sorbent is supported on a metal mesh substrate having an ultra-short-channel-length. Withdrawn
The process of Claim 2 wherein the effluent stream comprises air or a waste gas stream containing a volatile organic compound in a concentration less than 50 ppm v. Withdrawn
A sorbent composition comprising a nitrogen and oxygen-functionalized graphene prepared by a method comprising reacting graphene oxide with an amine of the formula NHR 2 wherein each R is independently selected from the group consisting of hydrogen, C 1-5 alkyl, and C 1-5 aminoalkyl, the reacting occurring in the absence of a carbon nanotube and occurring under process conditions sufficient to prepare the nitrogen and oxygen-functionalized graphene, wherein oxygen is present in the graphene oxide in a concentration greater than 5 percent and less than 40 percent by weight of which carboxyl functionality represents from 30 to 100 percent by weight of the total oxygen. Currently amended
The sorbent composition of Claim 18 wherein the amine is aqueous ammonia (ammonium hydroxide). Original
The sorbent composition of Claim 18 wherein the amine is reacted with the graphene oxide at a temperature between 50 ° C and 120 ° C for a time from about 1 hour to about 48 hours. Original
The sorbent composition of Claim 18 wherein in the preparation method from greater than percent to essentially 100 percent of oxygen-containing substituents on the graphene oxide are converted to nitrogen-containing substituents. Original
The sorbent composition of Claim 18 wherein the nitrogen and oxygen- functionalized graphene has a surface area ranging from about 100 m 2/g to about 1,000 m 2/g. Currently amended
The sorbent composition of Claim 18 wherein the sorbent is supported on a metal mesh substrate having an ultra-short channel length. Original
The sorbent composition of Claim 18 being capable of regeneration at a temperature ranging from 22 ° C to 50 ° C,, whereby with each regeneration cycle recovering more than 50 percent of sorbent capacity. Currently amended
An HVAC system comprising the sorbent composition of Claim 18. Original
A stand-alone air purification system comprising the sorbent composition of Claim 18. Original
An industrial sorbent bed comprising the sorbent composition of Claim 18. Original
The sorbent composition of Claim 18, wherein the amine attaches to the functionalized graphene through amide functionalities. New
The sorbent composition of Claim 18, wherein the graphene oxide is refluxed with the amine and the amine is replenished as needed during reflux. New
Materials described outside the worked examples.
graphene oxide
amine NHR₂
NHR₂
nitrogen and oxygen-functionalized graphene
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Surface Area | 100–1000 m2/g | nitrogen and oxygen-functionalized graphene |
Thickness | 2–3 nm |
Related documents with shared materials, methods, properties, or citations.
formaldehyde
CH₂O
aqueous ammonia (ammonium hydroxide)
NH₄OH
FIG. 2 depicts a graph of formaldehyde break-through as a function of time for the zeolite Y comparative sorbent, which was the best of the comparative …
FIG. 2 depicts a graph of formaldehyde break-through as a function of time for the zeolite Y comparative sorbent, which was the best of the comparative …
FIG. 3 depicts graphs of formaldehyde break-through as a function of time for an embodiment of the process of this invention cycled through four …
FIG. 4 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
FIG. 5 depicts graphs of formaldehyde desorption as a function of time for an embodiment of the functionalized graphene sorbent of this invention, as observed …
FIG. 7. In cycle 1, as shown in
FIG. 8 depicts a graph of toluene breakthrough as a function of time for an embodiment of the process of this invention. DETAILED DESCRIPTION OF THE INVENTION …
FIG. 8 depicts a graph of toluene breakthrough as a function of time for an embodiment of the process of this invention. DETAILED DESCRIPTION OF THE INVENTION …
| — |
Temperature | 90–100 °C | — |
Pressure | 2–3 psi | — |
Pressure | 14–21 kPa | — |
Duration | 5–48 hours | — |
Temperature | 5–50 °C | — |
Temperature | 22–25 °C | — |
Thickness | ≤ 50 nm | — |
Thickness | ≤ 10 µm | — |
Pressure | ≤ 50 pa | — |
Pressure | ≤ 1 pa | — |
Pressure | ≤ 8000 pa | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 200 nm | — |
Thickness | ≥ 5 mm | — |
Temperature | 50–120 °C | — |
Duration | 1–48 hours | — |
Temperature | 22–50 °C | — |
Temperature | ≤ 50 °C | — |
formaldehyde
CH₂O
aqueous ammonia (ammonium hydroxide)
NH₄OH
FIG. 2 depicts a graph of formaldehyde break-through as a function of time for the zeolite Y comparative sorbent, which was the best of the comparative …
FIG. 2 depicts a graph of formaldehyde break-through as a function of time for the zeolite Y comparative sorbent, which was the best of the comparative …
FIG. 3 depicts graphs of formaldehyde break-through as a function of time for an embodiment of the process of this invention cycled through four …
FIG. 4 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
FIG. 5 depicts graphs of formaldehyde desorption as a function of time for an embodiment of the functionalized graphene sorbent of this invention, as observed …
FIG. 7. In cycle 1, as shown in
FIG. 8 depicts a graph of toluene breakthrough as a function of time for an embodiment of the process of this invention. DETAILED DESCRIPTION OF THE INVENTION …
FIG. 8 depicts a graph of toluene breakthrough as a function of time for an embodiment of the process of this invention. DETAILED DESCRIPTION OF THE INVENTION …
| — |
Temperature | 90–100 °C | — |
Pressure | 2–3 psi | — |
Pressure | 14–21 kPa | — |
Duration | 5–48 hours | — |
Temperature | 5–50 °C | — |
Temperature | 22–25 °C | — |
Thickness | ≤ 50 nm | — |
Thickness | ≤ 10 µm | — |
Pressure | ≤ 50 pa | — |
Pressure | ≤ 1 pa | — |
Pressure | ≤ 8000 pa | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 200 nm | — |
Thickness | ≥ 5 mm | — |
Temperature | 50–120 °C | — |
Duration | 1–48 hours | — |
Temperature | 22–50 °C | — |
Temperature | ≤ 50 °C | — |
formaldehyde
CH₂O
aqueous ammonia (ammonium hydroxide)
NH₄OH
FIG. 2 depicts a graph of formaldehyde break-through as a function of time for the zeolite Y comparative sorbent, which was the best of the comparative …
FIG. 2 depicts a graph of formaldehyde break-through as a function of time for the zeolite Y comparative sorbent, which was the best of the comparative …
FIG. 3 depicts graphs of formaldehyde break-through as a function of time for an embodiment of the process of this invention cycled through four …
FIG. 4 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
FIG. 5 depicts graphs of formaldehyde desorption as a function of time for an embodiment of the functionalized graphene sorbent of this invention, as observed …
FIG. 7. In cycle 1, as shown in
FIG. 8 depicts a graph of toluene breakthrough as a function of time for an embodiment of the process of this invention. DETAILED DESCRIPTION OF THE INVENTION …
FIG. 8 depicts a graph of toluene breakthrough as a function of time for an embodiment of the process of this invention. DETAILED DESCRIPTION OF THE INVENTION …
| — |
Temperature | 90–100 °C | — |
Pressure | 2–3 psi | — |
Pressure | 14–21 kPa | — |
Duration | 5–48 hours | — |
Temperature | 5–50 °C | — |
Temperature | 22–25 °C | — |
Thickness | ≤ 50 nm | — |
Thickness | ≤ 10 µm | — |
Pressure | ≤ 50 pa | — |
Pressure | ≤ 1 pa | — |
Pressure | ≤ 8000 pa | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 200 nm | — |
Thickness | ≥ 5 mm | — |
Temperature | 50–120 °C | — |
Duration | 1–48 hours | — |
Temperature | 22–50 °C | — |
Temperature | ≤ 50 °C | — |
formaldehyde
CH₂O
aqueous ammonia (ammonium hydroxide)
NH₄OH
FIG. 2 depicts a graph of formaldehyde break-through as a function of time for the zeolite Y comparative sorbent, which was the best of the comparative …
FIG. 2 depicts a graph of formaldehyde break-through as a function of time for the zeolite Y comparative sorbent, which was the best of the comparative …
FIG. 3 depicts graphs of formaldehyde break-through as a function of time for an embodiment of the process of this invention cycled through four …
FIG. 4 depicts a bar graph of sorbent capacity of an embodiment of the functionalized graphene sorbent of this invention, as used in the process of this …
FIG. 5 depicts graphs of formaldehyde desorption as a function of time for an embodiment of the functionalized graphene sorbent of this invention, as observed …
FIG. 7. In cycle 1, as shown in
FIG. 8 depicts a graph of toluene breakthrough as a function of time for an embodiment of the process of this invention. DETAILED DESCRIPTION OF THE INVENTION …
FIG. 8 depicts a graph of toluene breakthrough as a function of time for an embodiment of the process of this invention. DETAILED DESCRIPTION OF THE INVENTION …
| — |
Temperature | 90–100 °C | — |
Pressure | 2–3 psi | — |
Pressure | 14–21 kPa | — |
Duration | 5–48 hours | — |
Temperature | 5–50 °C | — |
Temperature | 22–25 °C | — |
Thickness | ≤ 50 nm | — |
Thickness | ≤ 10 µm | — |
Pressure | ≤ 50 pa | — |
Pressure | ≤ 1 pa | — |
Pressure | ≤ 8000 pa | — |
Thickness | ≥ 1 nm | — |
Thickness | ≥ 200 nm | — |
Thickness | ≥ 5 mm | — |
Temperature | 50–120 °C | — |
Duration | 1–48 hours | — |
Temperature | 22–50 °C | — |
Temperature | ≤ 50 °C | — |