Gels for removing air pollutants

Patent metadata

Field	Value
Publication number	US-10967360-B2
Application number	US-201715811245-A
Country	US
Kind code	B2
Filing date	Nov 13, 2017
Priority date	Nov 13, 2017
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

Gels that can react with air pollutants in air and methods for making said gels, are provided. The gels are useful for removing air borne pollutants from indoor environments.

First claim

What is claimed is:

1. A gel for removing one or more air pollutants from air, comprising:
at least one polymer;
at least one adsorbent;
at least one chelating agent chosen from sodium tripolyphosphate, sodium polyphosphate, sodium hexametaphosphate, sodium pyrophosphate, nitrilotriacetic acid, diethylene triamine pentaacetic acid, ethylene glycol-bis-(β-aminoethyl ether)-N,N-tetraacetic acid, tetrasodium vinoxy diphosphate, aminotrimethylene phosphonate, and mixtures thereof;
at least one component that reacts with at least one air pollutant; and
water.

2. The gel of claim 1 , wherein the gel is a hydrogel.

3. The gel of claim 1 , wherein the polymer is chosen from acacia, gelatin, carrageenan, locust bean gum, konjac gum, xanthan gum, starch, cyclodextrin, sodium alginate, chitosan, carboxymethyl chitosan, polyvinyl alcohol, polyurea, and mixtures thereof.

4. The gel of claim 3 , wherein the at least one polymer is about 1 to about 30 wt % of the gel.

5. The gel of claim 1 , wherein the at least one adsorbent is chosen from porous silica, zinc ricinoleate, polyacrylamide, activated carbon, a molecular sieve, and mixtures thereof.

6. The gel of claim 5 , wherein the at least one adsorbent is about 1 to about 30 wt % of the gel.

7. The gel of claim 1 , wherein the at least chelating agent is about 0.01 to about 20 wt % of the gel.

8. The gel of claim 1 , wherein the air pollutant comprises at least one volatile organic compound (VOC).

9. The gel of claim 8 , wherein the VOC is formaldehyde, benzene, toluene, xylene, para-dichlorobenzene, ethyl benzene, styrene, acetaldehyde, cyclohexanone, isophorone, methanol, ethanol, phenol, acetone, ethyl acetate, n-butanol, methyl isobutyl ketone, n-butyl acetate, acetophenone, methyl ethyl ketone, isopropyl alcohol, dichloromethane, trichloroethylene, n-hexane, 2-methoxylethyl acetate, nitrobenzene, bis-(2-methyoxyethyl)ether, 1,3,5-trimethylbenzene, and mixtures thereof.

10. The gel of claim 1 , wherein the at least one component reactive with at least one air pollutant is chosen from 2-(diethanolamino) ethanesulfonic acid, aminoethanesulfonic acid, trimethylolmethylaminoethanesulfonic acid, N-(2-acetylamino)-2-aminoethanesulfonate, adipic acid dihydrazide, propionyl hydrazide, trimethylolaminomethane, ammonium sulfate, diethylenetriamine, triethylenetetramine, methyl acetoacetate, dimethyl malonate esters, and mixtures thereof.

11. The gel of claim 10 , wherein the at least one component reactive with at least one air pollutant is about 0.01 to about 20 wt % of the gel.

12. The gel of claim 1 , wherein the gel further comprises a crosslinking agent.

13. The gel of claim 12 , wherein the crosslinking is chosen from sodium chloride, magnesium chloride, potassium chloride, barium chloride, magnesium sulfate, sodium sulfate, potassium sulfate, potassium hydrogen sulfate, sodium carbonate, potassium carbonate, potassium hydrogen carbonate, sodium bicarbonate, magnesium carbonate, and mixtures thereof.

14. The gel of claim 12 , wherein the crosslinking agent is about 0.01 to about 20 wt % of the gel.

15. A method of making the gel of claim 1 , comprising:
combining the at least one polymer, the at least one adsorbent, the at least one chelating agent, and the at least one component reactive with at least one air pollutant to form the gel.

16. A gel for removing air pollutants from air, comprising:
about 1 to about 10 wt % of carrageenan;
about 1 to about 10 wt % of porous silica;
about 0.1 to about 5 wt % of potassium chloride;
about 0.1 to about 5 wt % of sodium hexametaphosphate;
about 0.1 to about 5 wt % of aminoethanesulfonic acid; and
water.

17. A method of removing one or more air pollutants from air, comprising:
contacting the gel of claim 1 with air.

18. A method of making an apparatus for removing one or more air pollutants from air, comprising applying the gel of claim 1 to a surface.

19. An apparatus for removing one or more air pollutants from air, comprising the gel of claim 1 .

20. A gel for removing air pollutants from air, comprising:
about 1 to about 30 wt % of acacia, gelatin, carrageenan, locust bean gum, konjac gum, xanthan gum, starch, cyclodextrin, sodium alginate, chitosan, carboxymethyl chitosan, polyvinyl alcohol, polyurea, or combinations thereof;
about 1 to about 30 wt % of porous silica, zinc ricinoleate, polyacrylamide, activated carbon, a molecular sieve, or combinations thereof;
about 0.1 to about 20 wt % of sodium chloride, magnesium chloride, potassium chloride, barium chloride, magnesium sulfate, sodium sulfate, potassium sulfate, potassium hydrogen sulfate, sodium carbonate, potassium carbonate, potassium hydrogen carbonate, sodium bicarbonate, magnesium carbonate, or combinations thereof;
about 0.1 to about 20 wt % of sodium tripolyphosphate, sodium polyphosphate, sodium hexametaphosphate, sodium pyrophosphate, nitrilotriacetic acid, diethylene triamine pentaacetic acid, ethylene glycol-bis-(β-aminoethyl ether)-N, N-tetraacetic acid, tetrasodium vinoxy diphosphate, aminotrimethylene phosphonate, or combinations thereof;
about 0.1 to about 20 wt % of 2-(diethanolamino) ethanesulfonic acid, aminoethanesulfonic acid, trimethylolmethylaminoethanesulfonic acid, N-(2-acetylamino)-2-aminoethanesulfonate, adipic acid dihydrazide, propionyl hydrazide, trimethylolaminomethane, ammonium sulfate, diethylenetriamine, triethylenetetramine, methyl acetoacetate, dimethyl malonate esters, or combinations thereof; and
water.

Assignees

• Honeywell Int Inc

Inventors

• Huang Kai
• Wang Marilyn
• Wang Xingping
• Yu Jack
• Nie Wesley
• Liu Hailin

Classifications

• B01D2253/25

  Coated, impregnated or composite adsorbents · CPC title

• B01D2253/202

  Polymeric adsorbents · CPC title

• B01D2253/108

  Zeolites · CPC title

• B01D2253/102

  Carbon · CPC title

• B01D53/02

  by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} · CPC title