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:
Oct. 24, 2006
Filed:
Mar. 24, 2005
Ta-wei Fu, Vienna, WV (US);
Steven H. Swearingen, Wilmington, DE (US);
Takuya Ichida, Settsu, JP;
Shuji Itatani, Settsu, JP;
Ta-Wei Fu, Vienna, WV (US);
Steven H. Swearingen, Wilmington, DE (US);
Takuya Ichida, Settsu, JP;
Shuji Itatani, Settsu, JP;
E.I. DuPont De Nemours and Company, Wilmington, DE (US);
Daikin Industries, Ltd., Osaka, JP;
Abstract
A fluorocarboxylic acid preparation process continuously carries out acidification reaction treatment and washing treatment, and includes subjecting a fluorocarboxylate-containing aqueous solution to acidification reaction treatment in the presence of sulfuric acid so as to form a sulfate-containing fluorocarboxylic acid phase; and subjecting the fluorocarboxylic acid phase to washing treatment using an aqueous sulfuric acid solution.