Composition useful for producing acidic gas separation membrane

Patent metadata

Field	Value
Publication number	US-11850558-B2
Application number	US-201917275802-A
Country	US
Kind code	B2
Filing date	Sep 12, 2019
Priority date	Sep 14, 2018
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

The present invention provides a composition containing the following components (A)-(C): (A) an alkali metal compound, (B) a polymer having an acidic dissociative group, and (C) a compound having an acidic dissociative group and an amino group, and having β of more than 0.0 and less than 1.0 as calculated by the formula (I): β={amount (mol) of alkali metal in component (A)−amount (mol) of acidic dissociative group in component (B)}/amount (mol) of acidic dissociative group in component (C).

First claim

The invention claimed is:

1. A composition comprising the following components (A)-(C):
(A) an alkali metal compound,
(B) a polymer having an acidic dissociative group, and
(C) a compound having an acidic dissociative group and an amino group, and
having β of more than 0.0 and not more than 0.90 as calculated by the following formula (I):
β={amount (mol) of alkali metal in component ( A )−amount (mol) of acidic dissociative group in component ( B )}/amount (mol) of acidic dissociative group in component ( C )  (I).

2. The composition according to claim 1 , wherein said β is not less than 0.05.

3. The composition according to claim 1 , wherein said component (B) comprises a water-absorbing crosslinked polymer having an acidic dissociative group.

4. The composition according to claim 3 , wherein said component (B) comprises a non-crosslinked polymer having an acidic dissociative group.

5. The composition according to claim 1 , wherein the composition is used to produce an acidic gas separation membrane.

6. An acidic gas separation membrane comprising the composition according to claim 1 .

7. An acidic gas separation membrane element comprising the acidic gas separation membrane according to claim 6 .

8. The acidic gas separation membrane element according to claim 7 , comprising
a laminated body comprising the acidic gas separation membrane and at least one of a feed-side flow path member and a permeate-side flow path member, and
a hollow tube with plural holes formed on a wall, and having a structure wherein the laminated body is wound around the hollow tube.

9. An acidic gas separation membrane module comprising the acidic gas separation membrane element according to claim 7 .

10. The acidic gas separation membrane module according to claim 9 , comprising
at least one acidic gas separation membrane element,
a mixed gas-feed part for feeding a mixed gas to the acidic gas separation membrane,
a retentate gas-exhaust part for exhausting a retentate gas that did not pass through the acidic gas separation membrane, and
a permeate gas-exhaust part for exhausting a permeate gas that passed through the acidic gas separation membrane.

11. An acidic gas separation apparatus comprising at least one acidic gas separation membrane module according to claim 9 .

12. The acidic gas separation apparatus according to claim 11 , further comprising at least one of a means of reducing the pressure of the permeate gas, and a means of supplying a sweep gas that is exhausted together with the permeate gas, wherein
the means of reducing the pressure of the permeate gas communicates with a permeate gas-exhaust part of the acidic gas separation membrane module, and
the means of supplying a sweep gas communicates with a sweep gas-supply part of the acidic gas separation membrane module.

13. A method for producing an acidic gas separation membrane comprising
a step of preparing a coating liquid by mixing the following components (A)-(C):
(A) an alkali metal compound,
(B) a polymer having an acidic dissociative group, and
(C) a compound having an acidic dissociative group and an amino group, and
a medium,
a step of applying the coating liquid on a porous layer to form a film of the coating liquid, and
a step of removing the medium from the film of the coating liquid, wherein

β as calculated by the following formula (I):
β={amount (mol) of alkali metal in component ( A )−amount (mol) of acidic dissociative group in component ( B )}/amount (mol) of acidic dissociative group in component ( C )  (I)

is more than 0.0 and not more than 0.90.

Assignees

• Sumitomo Chemical Co

Inventors

• Kasahara Shohei
• Makiguchi Kosuke
• Kashiwabara Taigo

Classifications

• B01D69/1213

  Laminated layers · CPC title

• B01D71/401

  Polymers based on the polymerisation of acrylic acid, e.g. polyacrylate · CPC title

• B01D71/0213

  Silicon · CPC title

• B01D53/228 Primary

  characterised by specific membranes · CPC title

• B01D69/142 Primary

  with "carriers" · CPC title