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. 27, 2007
Filed:
Nov. 10, 1999
Applicants:
Tatsuo Nakada, Osaka, JP;
Masayoshi Imoto, Osaka, JP;
Takashi Shibanuma, Osaka, JP;
Inventors:
Assignee:
Daikin Industries, Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C 17/04 (2006.01); C07C 17/02 (2006.01); C09K 21/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A mixture comprising at least 1,1,1,3,3-pentafluoropropane and 1,1,1-trifluoro-3-chloro-2-propene is subjected to a distillation operation, and thereby, a distillate comprising an azeotropic composition consisting substantially of 1,1,1,3,3-pentafluoropropane and 1,1,1-trifluoro-3-chloro-2-propene is obtained and a bottom product comprising 1,1,1,3,3-pentafluoropropane or 1,1,1-trifluoro-3-chloro-2-propene which each is separated and purified.