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:
Jan. 31, 2006
Filed:
Nov. 19, 2002
Hidekazu Okamoto, Yokohama, JP;
Akihiro Wada, Ichihara, JP;
Toshihiko Toma, Ichihara, JP;
Nobuyuki Yamagishi, Ichihara, JP;
Hidekazu Okamoto, Yokohama, JP;
Akihiro Wada, Ichihara, JP;
Toshihiko Toma, Ichihara, JP;
Nobuyuki Yamagishi, Ichihara, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
The present invention has an object to provide a method for purifying a fluorinated hydroxyl compound of the formula 1 safely in a high yield under industrially practical conditions. Namely, a mixture containing a fluorinated hydroxyl compound of R—CRR—OH (Formula 1, wherein Ris a Cpolyfluoroalkyl group, and each of Rand Ris a hydrogen atom or a Calkyl group) such as 2,2,3,3-tetrafluoropropanol, and a compound having an unshared electron pair, is distilled by heating in the presence of a solid acid catalyst such as a cation exchange resin catalyst, or by adding a proton source such as water.