The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 1989
Filed:
Aug. 15, 1988
Toshiharu Hasumoto, Kawasaki, JP;
Kunio Kashiwada, Kawasaki, JP;
Minoru Konishi, Kawasaki, JP;
Nobuo Fujishiro, Kawasaki, JP;
Showa Denko Kabushiki Kaisha, Tokyo, JP;
Abstract
A method of treating a trichlorotrifluoroethane containing waste gas. The trichlorotrifluoroethane waste gas is contacted at atmospheric pressure or under pressurized conditions with at least one absorber selected from the group consisting of saturated mineral oils, alkyl dipheny ether based oils, silicone oils, trichlorotrifluoroethane based oils, and perfluoropolyether based oils, having a vapor pressure of not higher than 7.6.times.10.sub.2 mmHg at 25.degree. C. and a viscosity of not higher than 500 cp at 25.degree. C., to remove trichlorotrifluoroethane contained in the waste gas by absorbing, and depressurizing the absorber having absorbed therein trichlorotrifluoroethane to recover trichlorotrifluoroethane.