US4303531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for adsorbing and recovering phenols
Assignee: Koei Chemical Co Ltd
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Filing: 1979-11-27
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Granted: 1981-12-01
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Expires: 1999-11-27
Abstract
Abstract The present invention relates to a: (a) material for adsorbing and recovering phenols which comprises as its main component a cross-linked polyvinylpyridine resin and (b) a method of recovering phenols using the above material.
Inventors
- 👤 Nariyoshi Kawabata
- 👤 Sinichi Yasuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:04
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/285; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
102 words
A process for adsorbing and recovering phenols from an aqueous solution thereof, which process comprises: (a) contacting said solution with a material having as its main component a tertiary-amine-type, anion-exchange resin copolymer of (i) at least one monovinyl pyridine monomer and (ii) at least one vinyl comonomer, said comonomer having a number of ethylenically unsaturated groups, and acting as a crosslinking agent, thereby causing adsorption of phenols onto said material at a high rate, and; (b) subsequently eluting said material with an eluting agent from which said phenols can be separated by distillation, thereby substantially recovering said phenols, and regenerating said resin.
Claim 2
Dependent Claim
102 words
A process for adsorbing and recovering phenols from an aqueous solution thereof, which process comprises: (a) contacting said solution with a material having as its main component a tertiary-amine-type, anion-exchange resin copolymer of (i) at least one monovinyl pyridine monomer and (ii) at least one vinyl comonomer, said comonomer having a number of ethylenically unsaturated groups, and acting as a crosslinking agent, thereby causing adsorption of phenols onto said material at a high rate, and; (b) subsequently eluting said material with an eluting agent from which said phenols can be separated by distillation, thereby substantially recovering said phenols, and regenerating said resin.
Claim 3
Dependent Claim
17 words
A process according to claim 1, wherein said aqueous solution is an industrial waste water containing phenols.
Claim 4
Dependent Claim
41 words
A process according to claim 2, wherein said industrial waste water is a waste coke oven gas liquor obtained by removing or neutralizing ammonia in a coke oven gas liquor, or a waste water originating from a phenolic resin manufacturing plant.
Claim 5
Dependent Claim
32 words
A process according to claim 1, wherein said eluting agent is at least one material selected from the group consisting of an aliphatic ketone, an aliphatic alcohol and an organic acid ester.
Claim 6
Dependent Claim
25 words
A process according to claim 1, wherein said eluting agent is at least one material selected from the group consisting of steam and hot water.
Claim 7
Dependent Claim
45 words
A process according to claim 1, wherein the process is carried out in combination with at least one method selected from the group consisting of an activated sludge process, an activated carbon treatment method, a solvent extraction treatment method, and an ion-exchange resin treatment method.
Claim 8
Dependent Claim
27 words
A process according to claim 1, wherein said monovinyl pyridine monomer is selected from the group consisting of 2-vinylpyridine, 4-vinylpyridine, 5-ethyl-2-vinylpyridine, 2-methyl-5-vinylpyridine, 2-methyl-6-vinylpyridine and 2-(4-pyridyl) allyl alcohol.
Claim 9
Dependent Claim
29 words
A process according to claim 1, wherein said vinyl comonomer is selected from the group consisting of divinylbenzene, divinyltoluene, divinylnaphthalene, ethyleneglycol diacrylate, ethyleneglycol dimethacrylate, divinyl pyridine, divinylquinoline and divinylisoquinoline.
Claim 10
Dependent Claim
14 words
A process according to claim 1, wherein said polymer has a gel type structure.
Claim 11
Dependent Claim
13 words
A process according to claim 1, wherein said polymer has a porous structure.
Claim 12
Dependent Claim
16 words
A process according to claim 1, wherein said polymer is a copolymer of 4-vinylpyridine and divinylbenzene.
Claim 13
Dependent Claim
17 words
A process according to claim 1, wherein said polymer is used in a mixture with a carrier.
Claim 14
Dependent Claim
61 words
A process according to claim 1, wherein said copolymer includes as constituents: (i) at least one first monovinyl monomer comprising a monovinyl pyridine, (ii) at least one second monovinyl monomer, other than a monovinyl pyridine, and (iii) a vinyl copolymer having a number of ethylenically unsaturated groups and acting as a crosslinking agent between said first and said second monovinyl monomers.
Claim 15
Dependent Claim
30 words
A process according to claim 13 wherein said additional monovinyl monomer is selected from the group consisting of styrene, vinyltoluene, ethylvinylbenzene, vinylnaphthalene, fluorostyrene, methyl acrylate, methyl methacrylate, acrylonitrile and vinylisoquinoline.
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) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |