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. 03, 2004
Filed:
Sep. 24, 2002
Applicant:
Inventors:
Kouki Fukumura, Omuta, JP;
Hiroshi Sonoda, Omuta, JP;
Hidetoshi Hayashi, Omuta, JP;
Masahiko Kusumoto, Omuta, JP;
Assignee:
Mitsui Chemicals, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 1/700 ; C07C 1/708 ; C07C 1/908 ;
U.S. Cl.
CPC ...
C07C 1/700 ; C07C 1/708 ; C07C 1/908 ;
Abstract
A method for producing an &agr;,&agr;-difluorocycloalkane at high purity with good efficiency, which comprises a step of treating a fluorocycloalkene with hydrogen fluoride wherein the fluorocycloalkene has one fluorine atom directly bonded to a carbon atom of carbon—carbon unsaturated double bond, more preferably, a step of directly adding the hydrogen fluoride to a reaction mixture obtained by treating the cycloalkanone with the de-oxygen fluorinating agent.