Patent EP0186182A2 successfully refreshed from Google Patents.
EP0186182A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid membrane
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1985-12-23
•
Granted: —
•
Expires: 2005-12-23
Abstract
Abstract A liquid membrane is disclosed, which comprises a solvent, an active species capable of performing facilitated transport of a specific gas, and a support for maintaining a liquid mixture of the solvent and the active species, wherein the active species has the structure represented by the following formula:
Inventors
- 👤 Koichi C/O Osaka Works Okita
- 👤 Shinichi C/O Osaka Works Toyooka
- 👤 Shigeru C/O Osaka Works Asako
- 👤 Katsuya C/O Osaka Works Yamada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 19:12
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0086; B01D61/00; B01D61/38; B01D69/00; B01D69/12; B01D69/125; B01D69/127; C; C01; C01B; C01B13/00; C01B13/02; C01B13/0229; C01B13/0248; C01B13/0251; C01B13/0255; C01B13/0285; C01B32/00; C01B32/40; C01B2210/00; C01B2210/0043; C01B2210/0046
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
45 words
A liquid membrane comprising a solvent, an active species capable of perfoming facilitated transport of a specific gas, and a support for maintaining a liguid mixture of said solvent and said active species, wherein said active species has the structure represented by the following formula:
Claim 2
Dependent Claim
45 words
A liquid membrane comprising a solvent, an active species capable of perfoming facilitated transport of a specific gas, and a support for maintaining a liguid mixture of said solvent and said active species, wherein said active species has the structure represented by the following formula:
Claim 5
Dependent Claim
23 words
The liquid membrane as claimed in Claim 1, wherein said support is a porous polytetrafluoroethylene having a hydrophobic surface and a hydrophilic surface.
Claim 6
Dependent Claim
26 words
The liquid membrane as claimed in Claim 2, wherein the hydrophilic surface of said support is made of a plasma polymerized coat of a nitrogen-containing compound.
Claim 7
Dependent Claim
25 words
The liquid membrane as claimed in Claim 1, wherein said solvent is selected from the group consisting of imidazole, sulfoxide, gamma-butyrolactone, and liquid mixtures thereof.
Claim 8
Dependent Claim
35 words
The liquid membrane as claimed in Claim 1, wherein the -CH 2 - groups of said -CH 2 -C 6 H 4 -CH 2 - are bonded in a meta relationship or a para relationship.
Claim 9
Dependent Claim
31 words
The liquid membrane as claimed in Claim 1, wherein said active species is employed in an amount of from 10- 5 to 10- 3 mole per gram of the liquid membrane.
Claim 10
Dependent Claim
36 words
The liquid membrane as claimed in Claim 2, wherein said porous polytetrafluoroethylene is composed of fibers and nodes interlinked with said fibers, wherein the hydrophilic surface of such polytetrafluoroethylene is formed both physical and chemical treatments.
Claim 11
Dependent Claim
21 words
The liquid membrane as claimed in Claim 7, wherein the physical treatment used to produce the hydrophilic surface is surface roughening.
Claim 12
Dependent Claim
21 words
The liquid membrane as claimed in Claim 7, wherein the chemical treatment used to produce the hydrophilic surface is plasma polymerization.
Claim 13
Dependent Claim
29 words
The liquid membrane as claimed in Claim 3, wherein the nitrogen-containing compound is at least one member selected from the group consisting of pyridine derivatives, pyrolidone derivatives and amins.
Claim 14
Dependent Claim
36 words
ll. The liquid membrane as claimed in Claim 10, wherein the nitrogen-containing compound is at least one member selected from the group consisting of vinylpyridine, 4-ethylpyridine, 5-vinyl-2-methylpyridine, N -vinylpyrrolidone, N-methylpyrolidone, 4-methyl benzylamine, N-butylamine, picoline and lutidine.
Claim 15
Dependent Claim
16 words
The liquid membrane as claimed in Claim 3, wherein the nitrogen-containing compound is a cyclic compond.
Claim 16
Dependent Claim
22 words
The liquid membrane as claimed in Claim 3, wherein the plasma polymerized coat has a thickness of from 0.1 to 6 µm.
Claim 17
Dependent Claim
22 words
The liquid membrane as claimed in Claim 13, wherein the plasma polymerized coat has a thickness of from 0.3 to 3 µm.
Claim 18
Dependent Claim
26 words
The liquid membrane as claimed in Claim 1, wherein said solvent is at least one member selected from the group consisting of lactam, sulfoxide and amide.
Claim 19
Dependent Claim
32 words
The liquid membrane as claimed in Claim 15, wherein said solvent is at least one member selected from the group consisting of dimethyl sulfoxide, N - methylpyrolidone, propyrene carbonate, dimethylformamide and gamma-butyrolactam.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.