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:
Feb. 04, 1997
Filed:
Jun. 07, 1995
Applicant:
Inventors:
Assignee:
Ausimont S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
570151 ; 570163 ; 570177 ;
Abstract
1,1,2-trifluoro-1,2-dichloroethane (Al23a) is isomerized to 1,1,1-tri-fluoro-2,2-dichloroethane (Al23) by contacting it with AlF.sub.3 at temperatures ranging from 180.degree. to 400.degree. C. Advantageously, it is operated with mixtures of Al23a with Al23 and/or other chlorofluorocarbons coming from the preparation of Al23 by hydrofluorination of perchloroethylene.