CARBOXYLIC ACID SALT ARTICLES AND METHODS OF MAKING AND USING THEM

• US 20110120306A1
• Filed: 11/24/2009
• Published: 05/26/2011
• Est. Priority Date: 11/24/2009
• Status: Active Grant

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: Jiang, Dayue David
• Granted Patent: US 8,163,069 B2
• Time in Patent Office: Days
• US Class Current: 95/91
• CPC Class Codes: B01D 2253/20 Organic adsorbents
• CPC Class Codes: B01D 2257/304 Hydrogen sulfide
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 53/02 by adsorption, e.g. preparative gas chromatography solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01
• CPC Class Codes: B01J 20/10 comprising silica or silicate
• CPC Class Codes: B01J 20/223 containing metals, e.g. organo-metallic compounds, coordination complexes
• CPC Class Codes: B01J 20/28045 Honeycomb or cellular structures; Solid foams or sponges
• CPC Class Codes: B01J 20/3204 Inorganic carriers, supports or substrates
• CPC Class Codes: B01J 20/3265 with an organic functional group containing a metal, e.g. a metal affinity ligand
• CPC Class Codes: B01J 20/3433 of sorbents or filter aids other than those covered by B01J20/3408 - B01J20/3425
• CPC Class Codes: B01J 20/3475 in the liquid phase
• CPC Class Codes: B01J 20/3483 by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
• CPC Class Codes: Y02C 20/40 of CO2

Abstract

An article comprising a substrate; and a carboxylic acid alkali salt disposed on the substrate, wherein the carboxylic acid alkali salt is derived from a carboxylic acid having at least one dissociation constant greater than or equal to 5. The article may be useful, for example, in the removal of an acid gas component from a gas.

Claims

1. An article comprising:

a substrate; and

a solid carboxylic acid alkali salt disposed on the substrate;

wherein the solid carboxylic acid alkali salt is derived from a carboxylic acid having at least one dissociation constant greater than or equal to 5.

2. The article of claim 1, wherein the substrate is in the form of a honeycomb.

3. The article of claim 1, wherein the substrate comprises glass wool.

4. The article of claim 1, wherein the solid carboxylic acid alkali salt is a carboxylic acid potassium salt.

5. The article of claim 1, wherein the solid carboxylic acid alkali salt is a carboxylic acid sodium salt.

6. The article of claim 1, wherein the solid carboxylic acid alkali salt is derived from a monocarboxylic acid.

7. The article of claim 1, wherein the solid carboxylic acid alkali salt is derived from a dicarboxylic acid or a multicarboxylic acid.

8. The article of claim 1, wherein the solid carboxylic acid alkali salt is derived from oxalic acid, succinic acid, adipic acid, maleic acid, glutaric acid, itaconic acid, heptanedionic acid, o-phthalic acid, butanetetracarboxylic acid, or methylsuccinic acid.

9. A method of making an article of claim 1 comprising:

providing a substrate;

applying a carboxylic acid alkali salt solution to the substrate to form a coated substrate; and

drying the coated substrate.

10. A method comprising contacting a gas comprising an acid gas with the article of claim 1 to remove at least a portion of the acid gas from the gas.

12. The method of claim 10, which comprises contacting the gas with the article at a temperature of from 0°

C. to 100°

C.

13. The method of claim 10, further comprising regenerating the article by removing at least a portion of the acid gas from the article.

14. The method of claim 13, wherein regenerating the article comprises contacting the article with water.

15. The method of claim 13, which comprises regenerating the article at a temperature above 100°

C.

16. The method of claim 10, which comprises regenerating the article without external heating.

17. The method of claim 10, wherein the acid gas is carbon dioxide.

18. The method of claim 10, wherein the acid gas is hydrogen sulfide.

11. A method comprising contacting a gas comprising an acid gas with a solid carboxylic acid alkali salt to remove at least a portion of the acid gas from the gas;

wherein the solid carboxylic acid alkali salt is derived from a carboxylic acid having at least one dissociation constant greater than or equal to 5.

19. The method of claim 11, further comprising regenerating the solid carboxylic acid alkali salt.

20. The method of claim 11, wherein the regenerating the solid carboxylic acid alkali salt comprises contacting the solid carboxylic acid alkali salt with water.

21. The method of claim 11, which comprises regenerating the solid carboxylic acid alkali salt without external heating.

22. The method of claim 11, wherein the acid gas is carbon dioxide.

23. The method of claim 11, wherein the acid gas is hydrogen sulfide.