US3798876A
Expired / Lapsed
US
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Abatement of air pollution from organic compounds with polymeric adsorbents
Assignee: Rohm and Haas Co
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Filing: 1971-11-30
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Granted: 1974-03-26
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Expires: 1991-11-30
Abstract
Abstract This invention relates to an adsorption-based process for the recovery of gaseous and/or vaporized organic chemicals. More particularly, it relates to a method of limiting air pollution caused by atmospheric discharge of odiferous, toxic, or otherwise objectionable chemicals.
Inventors
- 👤 D Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:05
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/74; B01D53/86; B01J; B01J20/00; B01J20/22
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
29 words
A method according to claim 1 wherein the industrial plant is selected from the group consisting of spray painting, lacquering, dry cleaning, adhesive bonding, petroleum refining and chemical synthesis.
Claim 2
Dependent Claim
62 words
A method according to claim 1 wherein the macroreticular resin is in the form of small spheroidal beads of predominantly 4 to 100 mesh size, the resin having a porosity of 30 percent ranging up to 70 percent, a specific surface area of 100 ranging to 900 square meters per gram; and an average pore diameter of 20 A to 200 A.
Claim 3
Dependent Claim
19 words
The method according to claim 1 wherein the desorbed organic compounds are condensed from the regenerant fluid and recovered.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein the polymer comprises 100 percent of a polyfunctional methacrylate cOntaining at least three methacrylate groups.
Claim 5
Dependent Claim
12 words
The method according to claim 1 wherein said regenerant fluid is steam.
Claim 6
Dependent Claim
24 words
A method according to claim 1 wherein the regenerant fluid is water or an aqueous solution of an acid, a base or a salt.
Claim 7
Dependent Claim
12 words
The method according to claim 1 wherein said regenerant fluid is air.
Claim 8
Dependent Claim
23 words
The method of claim 6 wherein the polymer bed is dried following regeneration by the passage therethrough of a low moisture gaseous fluid.
Claim 9
Dependent Claim
23 words
The method according to claim 1 wherein said regenerant fluid is an inert gas such as nitrogen, argon, helium, carbon dioxide or freon.
Claim 10
Dependent Claim
12 words
A method according to claim 1 wherein the organic vapor comprises perchloroethylene.
Claim 11
Dependent Claim
13 words
A method according to claim 1 wherein the organic vapor comprises aromatic solvents.
Claim 12
Dependent Claim
14 words
A method according to claim 1 wherein the organic vapor contains hydrocarbon fuel vapors.
Claim 13
Dependent Claim
18 words
A method according to claim 1 wherein the organic vapor comprises monomers such as acrylates, urethanes or styrene.
Claim 14
Dependent Claim
31 words
A method according to claim 1 wherein the organic vapor contains components derived from petroleum distillates having a boiling range of 90*-110*C., and the source of emission is organic synthesis reactions.
Claim 15
Dependent Claim
15 words
A method according to claim 1 wherein the regenerant fluid is a liquid organic solvent.
Claim 16
Dependent Claim
25 words
A method according to claim 1 whereby it is employed as a means to isolate and recover an organic substance present in the vapor phase.
Claim 17
Dependent Claim
30 words
The method according to claim 1 wherein the polymer is a copolymer of from 30 to 70 percent of methyl methacrylate and from 70 to 30 percent of trimethylolpropane trimethacrylate.
Claim 18
Dependent Claim
18 words
The method according to claim 1 wherein the polyfunctional methacrylate is one of trimethylolpropane trimethacrylate or pentaerythritol tetramethacrylate.
Claim 19
Dependent Claim
13 words
The method according to claim 5 wherein the polyfunctional methacrylate is trimethylolpropane trimethacrylate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |