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:
Jul. 11, 2006
Filed:
Jul. 27, 2004
Applicants:
Kazunari Kaga, Kawasaki, JP;
Hiromoto Ohno, Kawasaki, JP;
Toshio Ohi, Tokyo, JP;
Inventors:
Assignee:
Showa Denko K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 17/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process comprising fluorinating tetrachloroethylene to obtain a crude pentafluoroethane containing impurities and bringing the crude pentafluoroethane containing impurities into contact with oxygen and/or an oxygen-containing compound in the presence of a catalyst. There can be obtained high-purity pentafluoroethane which can be used as a low-temperature refrigerant or an etching gas or as a starting material for the production of high-purity hexafluoroethane.