Process for separation of a mixed gas

• US 4,115,081 A
• Filed: 11/08/1976
• Issued: 09/19/1978
• Est. Priority Date: 11/18/1975
• Status: Expired due to Term

• Current Assignee: Terukatsu Miyauchi, Tokyo Shibaura Electric Co., Ltd.
• Original Assignee: Terukatsu Miyauchi, Tokyo Shibaura Electric Co., Ltd.
• Inventors: Ohno, Masayoshi, Kikuchi, Tatsuji, Miyauchi, Terukatsu, Kakuta, Akio
• Primary Examiner(s): Hart, Charles N.
• Assistant Examiner(s): Spitzer, Robert H.
• Application Number:
  US05/739,951
• Time in Patent Office: 680 Days
• Field of Search: 55/63-66, 55/68, 55/70, 55/73, 55/84, 55/89
• US Class Current: 95/230
• CPC Class Codes: B01D 53/14 by absorption
• CPC Class Codes: B01D 53/1493 Selection of liquid materials for use as absorbents
• CPC Class Codes: G21F 9/02 Treating gases

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.

Claims

1. 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.

2. The process according to claim 1 wherein said mixed gas comprises at least two gases selected from the group consisting of H₂, N₂, O₂, He, Ar, Kr, Xe, CO₂, NO, N₂ O, NO₂, SO₂, H₂ S, CS₂, CH₄, C₂ H₂, C₂ H₆, C₂ H₃ Cl, and CH₂ CHCN.

3. The process according to claim 1, wherein the mixed gas to be selectively absorbed and separated contains at least one radioactive gas or gases.

4. 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.

5. A process for the separation of a mixed gas which comprises at least two gases selected from the group consisting of H₂, N₂, O₂, He, Ar, Kr, Xe, CO₂, NO, N₂ O, NO₂, SO₂, H₂ S, CS₂, CH₄, C₂ H₂, C₂ H₆, C₂ H₃ Cl, and CH₂ 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.

6. 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.