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:
Apr. 11, 2000
Filed:
Mar. 12, 1998
Showa Denko K.K., Tokyo, JP;
Abstract
A process for separating pentafluoroethane and 1,1,1-trifluoroethane, which comprises extraction distilling a mixed fluid comprising pentafluoroethane and 1,1,1-trifluoroethane in the presence of at least one extracting agent selected from the group consisting of esters and ketones each having a standard boiling point of from -10.degree. C. to 100.degree. C. Also disclosed is a process for separating pentafluoroethane, 1,1,1-trifluoroethane and chloropentafluoroethane, which comprises extraction distilling a mixed fluid comprising pentafluoroethane, 1,1,1-trifluoroethane and chloropentafluoroethane in the presence of at least one extracting agent selected from the group consisting of esters and ketones each having a standard boiling point of from -10.degree. C. to 100.degree. C.