Patent US4758348A successfully refreshed from Google Patents.
US4758348A
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Copolymer, separating membrane made thereof and method for separating charge transfer interactive substance from a liquid mixture containing the same
Assignee: Sagami Chemical Research Institute
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Filing: 1986-01-27
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Granted: 1988-07-19
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Expires: 2006-01-27
Abstract
Abstract A method for separating a charge transfer interactive substance from a liquid mixture containing such a substance, wherein the separation is conducted by means of a separating membrane made of a copolymer having charge transfer interactive groups.
Inventors
- 👤 Kiyohide Matsui
- 👤 Kazuhiko Ishihara
- 👤 Isao Shinohara
- 👤 Hiroyuki Nishide
- 👤 Rieko Kogure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:24
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/36; B01D61/362; B01D71/00; B01D71/06; B01D71/76; B01D71/82; C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
121 words
A method comprising separating two organic substances distinguished by their degree of charge transfer interactiveness with a copolymer having a charge interactive group, by, passing at least a portion of a liquid composition comprising said two organic substances through a membrane made of a copolymer having a charge interactive group which is an aromatic group substituted by at least two substituents selected from the group consisting of a nitro group, a cyano group, alkoxy groups, dialkylamino groups, perhalogeno aromatic groups and a quinonyl group, provided in proportions sufficient to enable said charge transfer interactiveness; and obtaining, by selective permeation through the membrane, a product containing an enriched amount of the organic substance having a higher degree of said charge transfer interactiveness.
Claim 2
Independent Claim
121 words
A method comprising separating two organic substances distinguished by their degree of charge transfer interactiveness with a copolymer having a charge interactive group, by, passing at least a portion of a liquid composition comprising said two organic substances through a membrane made of a copolymer having a charge interactive group which is an aromatic group substituted by at least two substituents selected from the group consisting of a nitro group, a cyano group, alkoxy groups, dialkylamino groups, perhalogeno aromatic groups and a quinonyl group, provided in proportions sufficient to enable said charge transfer interactiveness; and obtaining, by selective permeation through the membrane, a product containing an enriched amount of the organic substance having a higher degree of said charge transfer interactiveness.
Claim 3
Dependent Claim
26 words
The method of claim 1, wherein said membrane is made of a copolymer having a charge interactive group attached to the main chain of said copolymer.
Claim 4
Dependent Claim
19 words
The method of claim 1, wherein said charge interactive group comprises an aromatic group substituted by a nitro group.
Claim 5
Dependent Claim
19 words
The method of claim 1, wherein said charge interactive group comprises an aromatic group substituted by a cyano group.
Claim 6
Dependent Claim
14 words
The method of claim 1, wherein said charge interactive group comprises an aromatic group
Claim 7
Dependent Claim
19 words
The method of claim 1, wherein said charge interactive group comprises an aromatic group substituted by a dialkylamino group.
Claim 8
Dependent Claim
20 words
The method of claim 1, wherein said charge interactive group comprises an aromatic group substituted by a perhalogeno aromatic group.
Claim 9
Dependent Claim
19 words
The method of claim 1, wherein said charge interactive group comprises an aromatic group substituted by a quinonyl group.
Claim 10
Dependent Claim
21 words
The method of claim 1, wherein said organic substances distinguished by their degree of charged transfer interactiveness comprise an aromatic compound.
Claim 11
Dependent Claim
17 words
The method of claim 1, wherein said membrane has a thickness of from 0.01 to 200 micrometers.
Claim 12
Dependent Claim
14 words
The method of claim 10, wherein said thickness is from 0.05 to 100 micrometers.
Claim 13
Dependent Claim
10 words
The method of claim 1, wherein said membrane is supported.
Claim 14
Dependent Claim
31 words
The method of claim 1, wherein said organic substances distinguished by their degree of charge interactiveness are either a combination of benzene and cyclohexane or a combination of styrene or ethylbenzene.
Claim 15
Dependent Claim
29 words
The method of claim 1, wherein said membrane is supported and said support comprises a woven fabric support, a non-woven fabric support, a microfilter, or a filter for ultrafiltration.
Claim 16
Dependent Claim
20 words
The method of claim 1, wherein said two organic substances distinguished by their degree of charge transfer interactiveness comprise xylene.
Claim 17
Independent Claim
121 words
A method comprising separating positional isomers of xylene distinguished by their degree of charge transfer interactiveness with a copolymer having a charge interactive group, by, passing at least portion of a liquid composition comprising said positional isomers of xylene through a membrane made of a copolymer having a charge interactive group which is an aromatic group substituted by at least two substituents selected from the group consisting of a nitro group, a cyano group, alkoxy groups, dialkylamino groups, perhalogeno aromatic groups and a quinonyl group, provided in proportions sufficient to enable said charge transfer interactiveness; obtaining, by selective permeation through the membrane, a product containing an enriched amount of the xylene isomer having a higher degree of said charge transfer interactiveness.
Claim 18
Independent Claim
121 words
A method comprising separating positional isomers of xylene distinguished by their degree of charge transfer interactiveness with a copolymer having a charge interactive group, by, passing at least portion of a liquid composition comprising said positional isomers of xylene through a membrane made of a copolymer having a charge interactive group which is an aromatic group substituted by at least two substituents selected from the group consisting of a nitro group, a cyano group, alkoxy groups, dialkylamino groups, perhalogeno aromatic groups and a quinonyl group, provided in proportions sufficient to enable said charge transfer interactiveness; obtaining, by selective permeation through the membrane, a product containing an enriched amount of the xylene isomer having a higher degree of said charge transfer interactiveness.
Claim 19
Dependent Claim
26 words
The method of claim 16, comprising separating m-xylene and o-xylene, or separating o-xylene and p-xylene, or separating m-xylene and p-xylene, or separating o-xylene, m-xylene and p-xylene.
Claim 20
Independent Claim
121 words
A method comprising separating two organic substances distinguished by their degree of charge transfer interactiveness with a copolymer having a charge interactive group, by, passing at least a portion of a liquid composition comprising said two organic substances through a membrane made of a copolymer having a charge interactive group which is an aromatic group substituted by at least two substituents selected from the group consisting of a nitro group, a cyano group, alkoxy groups, dialkylamino groups, perhalogeno aromatic groups and a quinonyl group, provided in proportions sufficient to enable said charge transfer interactiveness; and obtaining, by selective permeation through the membrane, a product containing an enriched amount of the organic substance having a lower degree of said charge transfer interactiveness.
Claim 21
Independent Claim
121 words
A method comprising separating two organic substances distinguished by their degree of charge transfer interactiveness with a copolymer having a charge interactive group, by, passing at least a portion of a liquid composition comprising said two organic substances through a membrane made of a copolymer having a charge interactive group which is an aromatic group substituted by at least two substituents selected from the group consisting of a nitro group, a cyano group, alkoxy groups, dialkylamino groups, perhalogeno aromatic groups and a quinonyl group, provided in proportions sufficient to enable said charge transfer interactiveness; and obtaining, by selective permeation through the membrane, a product containing an enriched amount of the organic substance having a lower degree of said charge transfer interactiveness.
Claim 22
Dependent Claim
26 words
The method of claim 18, wherein said membrane is made of a copolymer having a charge interactive group attached to the main chain of said copolymer.
Claim 23
Dependent Claim
19 words
The method of claim 18, wherein said charge interactive group comprises an aromatic group substituted by a nitro group.
Claim 24
Dependent Claim
19 words
The method of claim 18, wherein said charge interactive group comprises an aromatic group substituted by a cyano group.
Claim 25
Dependent Claim
19 words
The method of claim 18, wherein said charge interactive group comprises an aromatic group substituted by an alkoxy group.
Claim 26
Dependent Claim
19 words
The method of claim 18, wherein said charge interactive group comprises an aromatic group substituted by a dialkylamino group.
Claim 27
Dependent Claim
20 words
The method of claim 18, wherein said charge interactive group comprises an aromatic group substituted by a perhalogeno aromatic group.
Claim 28
Dependent Claim
19 words
The method of claim 18, wherein said charge interactive group comprises an aromatic group substituted by a quinonyl group.
Claim 29
Dependent Claim
21 words
The method of claim 18, wherein said organic substances distinguished by their degree of charged transfer interactiveness comprise an aromatic compound.
Claim 30
Dependent Claim
17 words
The method of claim 18, wherein said membrane has a thickness of from 0.01 to 200 micrometers.
Claim 31
Dependent Claim
14 words
The method of claim 27, wherein said thickness is from 0.05 to 100 micrometers.
Claim 32
Dependent Claim
10 words
The method of claim 18, wherein said membrane is supported.
Claim 33
Dependent Claim
31 words
The method of claim 18, wherein said organic substances distinguished by their degree of charge interactiveness are either a combination of benzene and cyclohexane or a combination of styrene or ethylbenzene.
Claim 34
Dependent Claim
29 words
The method of claim 18, wherein said membrane is supported and said support comprises a woven fabric support, a non-woven fabric support, a microfilter, or a filter for ultrafiltration.
Claim 35
Dependent Claim
20 words
The method of claim 18, wherein said two organic substances distinguished by their degree of charge transfer interactiveness comprise xylene.
Claim 36
Independent Claim
121 words
A method comprising separating positional isomers of xylene distinguished by their degree of charge transfer interactiveness with a copolymer having a charge interactive group, by, passing at least portion of a liquid composition comprising said positional isomers of xylene through a membrane made of a copolymer having a charge interactive group which is an aromatic group substituted by at least two substituents selected from the group consisting of a nitro group, a cyano group, alkoxy groups, dialkylamino groups, perhalogeno aromatic groups and a quinonyl group, provided in proportions sufficient to enable said charge transfer interactiveness; obtaining, by selective permeation through the membrane, a product containing an enriched amount of the xylene isomer having a lower degree of said charge transfer interactiveness.
Claim 37
Independent Claim
121 words
A method comprising separating positional isomers of xylene distinguished by their degree of charge transfer interactiveness with a copolymer having a charge interactive group, by, passing at least portion of a liquid composition comprising said positional isomers of xylene through a membrane made of a copolymer having a charge interactive group which is an aromatic group substituted by at least two substituents selected from the group consisting of a nitro group, a cyano group, alkoxy groups, dialkylamino groups, perhalogeno aromatic groups and a quinonyl group, provided in proportions sufficient to enable said charge transfer interactiveness; obtaining, by selective permeation through the membrane, a product containing an enriched amount of the xylene isomer having a lower degree of said charge transfer interactiveness.
Claim 38
Dependent Claim
26 words
The method of claim 33, comprising separating m-xylene and o-xylene, or separating o-xylene and p-xylene, or separating m-xylene and p-xylene, or separating o-xylene, m-xylene and p-xylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |