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:
Mar. 09, 1982
Filed:
Dec. 08, 1980
Applicant:
Inventors:
William J Cunningham, Williamsville, NY (US);
Addison M Smith, Buffalo, NY (US);
Robert A Wiles, Hamburg, NY (US);
Assignee:
Allied Chemical Corporation, Morris Township, Morris County, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
570177 ; 570134 ;
Abstract
The present invention provides a novel process for producing 1,2-dichloro-1,1,2,2-tetrafluoroethane substantially free of the 1,1-isomer. The process includes contacting, in the vapor phase, an organic feed composition containing a major amount of the 1,2-isomer and a minor amount of 1,1-isomer with hydrogen in the presence of a hydrodechlorination catalyst. The process selectively degrades the 1,1-isomer. Also provided is a process for producing high purity 1,2-isomer.