Primary amine aerogel and method of manufacture

Patent metadata

Field	Value
Publication number	US-2024082818-A1
Application number	US-202217897525-A
Country	US
Kind code	A1
Filing date	Aug 29, 2022
Priority date	Aug 29, 2022
Publication date	Mar 14, 2024
Grant date	—

Abstract

A polymer compound containing groups having the chemical structure:where NH2 is a primary amine, and R is not hydrogen, and a polymer backbone wherein two of the R groups are part of the polymer backbone. A method of synthesizing a polymer includes polymerizing amine-convertible monomers to produce a polymer, causing a deprotection reaction with the polymer to form an isocyanate, decomposing the isocyanate to form a polymer containing primary amines. A method to separate CO2 from other gases comprising using a sorbent containing a polymer compound having the structure:where NH2 is a primary amine, and R is not hydrogen, and a polymer backbone wherein two of the R groups are part of the polymer backbone.

First claim

What is claimed is:

1 . A polymer compound containing groups having the chemical structure:

where NH 2 is a primary amine, and R is not hydrogen; and
a polymer backbone wherein two of the R groups are part of the polymer backbone.

2 . The polymer compound as claimed in claim 1 , wherein R is selected from the group consisting of: alkyl, amino, hydroxyl, perfluoro, fluoro, chloro, nitro, cyano, aryl, and heterocyclic.

3 . The polymer compound as claimed in claim 1 , wherein the polymer has an alkyl backbone.

4 . The polymer compound as claimed in claim 1 , wherein the polymer comprises a copolymer having only amine-convertible monomers.

5 . The polymer compound as claimed in claim 1 , wherein the polymer comprises a copolymer having at least some non-amine-convertible monomers.

6 . The polymer compound as claimed in claim 1 , wherein the polymer compound comprises a porous aerogel.

7 . The polymer compound as claimed in claim 6 , wherein the porous aerogel has at least one of the characteristics selected from the group consisting of a porosity of greater than 10%, a specific surface area of at least 100 m 2 /g, a BET (Brunauer-Emmett-Teller) of greater than 50 m 2 /g, and a wall thickness in the range of 10-1000 nanometers

8 . A method of synthesizing a polymer, comprising:
polymerizing amine-convertible monomers to produce a polymer; causing a deprotection reaction with the polymer to form an isocyanate; decomposing the isocyanate to form a polymer containing primary amines.

9 . The method as claimed in claim 8 , wherein the amine-convertible monomers comprise a compound having the structure:

wherein NH 2 is a primary amine and R is not hydrogen.

10 . The method as claimed in claim 8 , wherein the amine-convertible monomers are a monomer selected from the group consisting of: methacrylamide monomers, acrylamide monomers, acryloyl chloride monomers, and vinyl azide monomers.

12 . The method as claimed in claim 8 , wherein the amine-convertible monomers comprise a compound having a structure:

where R is one of an alkyl, NH 2 , or OH, and X is one of NH 2 , OH, or Cl.

13 . The method as claimed in claim 8 , wherein polymerizing the amine-convertible monomers comprises radical polymerization.

14 . The method as claimed in claim 11 , wherein radical polymerization results in a porous aerogel.

15 . The method as claimed in claim 8 , wherein the deprotection reaction comprises one of either a Hoffman rearrangement or a Curtius rearrangement.

16 . A method to separate CO 2 from other gases comprising using a sorbent containing a polymer compound having the structure:

where NH 2 is a primay amine, and R is not hydrogen; and
a polymer backbone wherein two of the R groups are part of the polymer backbone

17 . The method as claimed in claim 16 , wherein using the sorbent comprises using the sorbent in one of a temperature swing sorbent, a temperature-vacuum swing sorbent, a pressure swing sorbent, or a combination of methods of using the sorbent.

18 . The method as claimed in claim 16 , wherein using the sorbent comprises using a sorbent in one of a fixed bed, fluidized bed, structured contactor, structured bed, or moving bed, sorber.

19 . The method as claimed in claim 16 , wherein the sorbent has particles of the compound having a size of no more than 1 millimeter.

20 . The method as claimed in claim 16 , wherein the gases include one or more of oxygen, oxyacids, sulfur oxides and nitrogen oxides.

Assignees

• Palo Alto Res Ct Inc

Inventors

• Xia Kelly
• Meckler Stephen Matthew
• Bachman Jonathan
• Chintapalli Mahati
• Iftime Gabriel

Classifications

• B01J20/262 Primary

  obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation (macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds per se C08G) · CPC title

• B01J20/28047 Primary

  Gels · CPC title

• B01J20/28061

  being in the range 100-500 m2/g · CPC title

• Y02C20/40

  of CO2 · CPC title