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. 03, 1998
Filed:
Jun. 07, 1995
Applicant:
Inventor:
Klaus Guenter Wuttke, Wilmington, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
570165 ; 570164 ; 570166 ; 570167 ; 570168 ;
Abstract
A process is disclosed for producing 1,1-difluoroethane (HFC-152a) in a liquid phase by contacting chloroethene and hydrogen fluoride in the presence of a tin tetrahalide catalyst. The ability to reduce tar formation and increase volumetric productivity is also disclosed.