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. 17, 1998
Filed:
Aug. 14, 1996
Applicant:
Inventors:
Assignee:
Daikin Industries Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
570136 ; 570142 ;
Abstract
A method for manufacturing 1,1,1,3,3-pentafluoropropene comprises the steps of adding 2-trifluoromethyl-3,3,3-trifluoropropionic acid under the presence of metal carbonate and/or metal hydrogencarbonate in an aprotic solvent at reaction temperature particularly from 40.degree. C. to 80.degree. C., of refining resulting reaction products to obtain 1,1,1,3,3-pentafluoropropene, and further of coexisting a desiccating agent therein. According to the method, 1,1,1,3,3-pentafluoropropene can be manufactured through industrially efficient and cost-effective way using 2-trifluoromethyl-3,3,3-trifluoropropionic acid as a raw material.