Apparatus for efficient removal of air pollutants

Patent metadata

Field	Value
Publication number	US-10744220-B2
Application number	US-201715811314-A
Country	US
Kind code	B2
Filing date	Nov 13, 2017
Priority date	Nov 13, 2017
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

An apparatus for removing air pollutants from the air is described. The apparatus contains a fan module and a chamber that can hold either activated carbon or a gel that reacts with air pollutants from air.

First claim

What is claimed is:

1. An apparatus for removing one or more air pollutants from air, comprising:
at least one fan unit; and
a chamber containing alternating layers of an activated carbon and a gel wherein the alternating layers of the activated carbon and the gel together remove the one or more air pollutants.

2. The apparatus of claim 1 , wherein the one or more air pollutants comprise at least one volatile organic compound (VOC).

3. The apparatus of claim 2 , wherein the at least VOC comprises 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, his-(2-methyoxyethyl)ether, 1,3,5-trimethylbenzene, and mixtures thereof.

4. The apparatus of claim 2 , wherein the at least one VOC is formaldehyde.

5. The apparatus of claim 1 , wherein the at least one fan unit comprises a battery.

6. The apparatus of claim 1 , wherein the at east one fan unit comprises an air inlet.

7. The apparatus of claim 6 , further comprising an air outlet.

8. The apparatus of claim 7 , wherein air passes from the chamber into the air outlet and out into surrounding air.

9. The apparatus of claim 8 , wherein the concentration of the one or more air pollutants exiting the air outlet is at least two times lower than the concentration of the one or more air pollutants entering the air inlet.

10. The apparatus of claim 1 , wherein the chamber comprises a removable cartridge comprising the alternating layers of the activated carbon and the gel for removing air pollutants.

11. The apparatus of claim 1 , wherein the gel comprises:
at least one polymer;
at least one adsorbent;
at least one chelating agent;
at least one component reactive with at least one air pollutant; and
water.

12. The apparatus of claim 11 , wherein the at least one polymer is chosen from acacia, gelatin, carrageenan, locust bean gum, konjac gum, xanthan gum, starch, cyclodextrin, sodium alginate, chitosan, carboxymethyl chitosan, polyvinyl alcohol, polyuria, and mixtures thereof.

13. The apparatus of claim 11 , wherein the at least one adsorbent is chosen from porous silica, zinc ricinoleate, polyacrylamide, activated carbon, molecular sieve, and mixtures thereof.

14. The apparatus of claim 11 , wherein the at least one chelating agent is 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 pyrophosphate, and aminotrimethylene phosphonate.

15. The apparatus of claim 11 , 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.

16. The apparatus of claim 11 , wherein the gel further comprises a crosslinking agent that 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.

17. The apparatus of claim 1 , wherein the activated carbon is present in about 5 to about 90 wt % of the apparatus.

18. The apparatus of claim 1 , wherein the gel is present in about 5 to about 90 wt % of the apparatus.

19. A method of removing air pollutants from air, comprising:
passing air containing air pollutants through the apparatus of claim 1 .

20. An apparatus for removing one or more air pollutants from air, comprising:
at least one fan unit; and
a chamber containing alternating layers of an activated carbon and a gel that together removes the one or more air pollutants, wherein the gel comprises:
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.

Assignees

• Honeywell Int Inc

Inventors

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

Classifications

• B01D53/0415 Primary

  Beds in cartridges · CPC title

• B01D2253/202

  Polymeric adsorbents · CPC title

• B01D2253/108

  Zeolites · CPC title

• A61L9/012

  characterised by being in a special form, e.g. gels, emulsions {(A61L9/048 takes precedence)} · CPC title

• B01D2253/106

  Silica or silicates · CPC title