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:
Jun. 10, 2014
Filed:
Aug. 05, 2008
Akihiro Ishii, Saitama, JP;
Hideyuki Tsuruta, Fujimino, JP;
Yuzuru Morino, Ube, JP;
Mikihiro Takahashi, Ube, JP;
Akihiro Ishii, Saitama, JP;
Hideyuki Tsuruta, Fujimino, JP;
Yuzuru Morino, Ube, JP;
Mikihiro Takahashi, Ube, JP;
Central Glass Company, Limited, Ube-shi, JP;
Abstract
Disclosed is a purification method of reducing and removing fluoride ions contained in an optically active α-fluorocarboxylic acid ester represented by formula [1] [in the formula, Rrepresents a Calkyl group, Rrepresents a Calkyl group, and * represents an asymmetric carbon], the purification method of the optically active α-fluorocarboxylic acid ester being characterized by that a distillation is conducted in the presence of an organic base. By this method, it is possible to greatly reduce the concentration of fluoride ion traces contained in the optically active α-fluorocarboxylic acid ester by a relatively easy operation. Of the organic base, a tertiary amine is preferable, and above all tri-n-butylamine is particularly preferable.