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. 10, 1987
Filed:
Jul. 16, 1985
Applicant:
Inventors:
Bernard Cheminal, Lyons, FR;
Henri Mathais, Saint Didier au Mont d'Or, FR;
Marc Thomarat, Pierre-Benite, FR;
Assignee:
Atochem, , FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568405 ; 568842 ; 568486 ;
Abstract
A process for preparing pure fluoral hydrate or hexafluoroacetone hydrate which comprises reacting a hemiacetal with the formula ##STR1## wherein R is hydrogen or CF.sub.3, with water in a distillation column, removing respectively the methanol or ethanol produced at the head of the column, and recovering at the bottom of the column the pure hydrate so produced.