US4115081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separation of a mixed gas
Assignee: Toshiba Corp
•
Filing: 1976-11-08
•
Granted: 1978-09-19
•
Expires: 1996-11-08
Abstract
Abstract Separation of a mixed gas is carried out at ordinary temperatures by employing a silicone oil, or a certain high polymeric substance in liquid form or in solution as the solvent for absorbing the gas. Among others, methylphenyl silicone oil is preferably employed as the solvent in separating radioactive gases.
Inventors
- 👤 Masayoshi Ohno
- 👤 Akio Kakuta
- 👤 Terukatsu Miyauchi
- 👤 Tatsuji Kikuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:06
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1493; G; G21; G21F; G21F9/00; G21F9/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
A process for the separation of a mixed gas comprising the step of passing said mixed gas through a solvent to separate said mixed gas by utilizing the differences in solubility of the constituent gases thereof in said solvent, wherein the improvement comprises employing a high polymeric substance selected from the group consisting of cellulose acetate, polymethacrylonitrile, polyglycol terephthalate, polyvinyl chloride, polymethyl methacrylate, butadiene-acrylonitrile copolymer, polyvinyl acetate, butadiene-vinylpyridine copolymer, polystyrene, polybutadiene, styrene-divinylbenzene copolymer, polyisoprene, polyisobutylene, polyethylene, and natural rubber in liquid form or in solution as said solvent.
Claim 2
Dependent Claim
88 words
A process for the separation of a mixed gas comprising the step of passing said mixed gas through a solvent to separate said mixed gas by utilizing the differences in solubility of the constituent gases thereof in said solvent, wherein the improvement comprises employing a high polymeric substance selected from the group consisting of cellulose acetate, polymethacrylonitrile, polyglycol terephthalate, polyvinyl chloride, polymethyl methacrylate, butadiene-acrylonitrile copolymer, polyvinyl acetate, butadiene-vinylpyridine copolymer, polystyrene, polybutadiene, styrene-divinylbenzene copolymer, polyisoprene, polyisobutylene, polyethylene, and natural rubber in liquid form or in solution as said solvent.
Claim 3
Dependent Claim
75 words
The process according to claim 1 wherein said mixed gas comprises at least two gases selected from the group consisting of H 2 , N 2 , O 2 , He, Ar, Kr, Xe, CO 2 , NO, N 2 O, NO 2 , SO 2 , H 2 S, CS 2 , CH 4 , C 2 H 2 , C 2 H 6 , C 2 H 3 Cl, and CH 2 CHCN.
Claim 4
Dependent Claim
24 words
The process according to claim 1, wherein the mixed gas to be selectively absorbed and separated contains at least one radioactive gas or gases.
Claim 5
Dependent Claim
57 words
A process for the separation of a mixed gas comprising the step of passing said mixed gas through a solvent to separate said mixed gas by utilizing the differences in solubility of the constituent gases thereof in said solvent, wherein the improvement comprises employing methylphenyl silicone oil as said solvent in order to separate said mixed gas.
Claim 6
Dependent Claim
57 words
A process for the separation of a mixed gas comprising the step of passing said mixed gas through a solvent to separate said mixed gas by utilizing the differences in solubility of the constituent gases thereof in said solvent, wherein the improvement comprises employing methylphenyl silicone oil as said solvent in order to separate said mixed gas.
Claim 7
Dependent Claim
122 words
A process for the separation of a mixed gas which comprises at least two gases selected from the group consisting of H 2 , N 2 , O 2 , He, Ar, Kr, Xe, CO 2 , NO, N 2 O, NO 2 , SO 2 , H 2 S, CS 2 , CH 4 , C 2 H 2 , C 2 H 6 , C 2 H 3 Cl, and CH 2 CHCN, comprising the step of passing said gas through a solvent to separate said mixed gas by utilizing the differences in solubility of the constituent gases thereof in said solvent, wherein the improvement comprises employing methylphenyl silicone oil as said solvent in order to separate said mixed gas.
Claim 8
Dependent Claim
122 words
A process for the separation of a mixed gas which comprises at least two gases selected from the group consisting of H 2 , N 2 , O 2 , He, Ar, Kr, Xe, CO 2 , NO, N 2 O, NO 2 , SO 2 , H 2 S, CS 2 , CH 4 , C 2 H 2 , C 2 H 6 , C 2 H 3 Cl, and CH 2 CHCN, comprising the step of passing said gas through a solvent to separate said mixed gas by utilizing the differences in solubility of the constituent gases thereof in said solvent, wherein the improvement comprises employing methylphenyl silicone oil as said solvent in order to separate said mixed gas.
Claim 9
Dependent Claim
74 words
A process for the separation of a mixed gas containing at least one radioactive gas comprising the step of passing said mixed gas through a solvent to separate said mixed gas by utilizing the differences in solubility of the constituted gases thereof in said solvent, wherein the improvement comprises employing methylphenyl silicone oil as said solvent in order to selectively absorb and separate at least one radioactive gas or gases from said mixed gas.
Claim 10
Dependent Claim
74 words
A process for the separation of a mixed gas containing at least one radioactive gas comprising the step of passing said mixed gas through a solvent to separate said mixed gas by utilizing the differences in solubility of the constituted gases thereof in said solvent, wherein the improvement comprises employing methylphenyl silicone oil as said solvent in order to selectively absorb and separate at least one radioactive gas or gases from said mixed gas.
References Cited (Backward Citations)
US2921648A
Cited
US3503186A
Cited
US3658463A
Cited
DE2051095A1
Cited
US3907972A
Cited
US3909206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |