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:
Jul. 05, 1994
Filed:
Nov. 05, 1993
Applicant:
Inventors:
Yves Correia, Chateau-Arnoux, FR;
Sylvain Perdrieux, Vernaison, FR;
Assignee:
Elf Atochem S.A., , FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07B / ;
U.S. Cl.
CPC ...
570177 ; 20415811 ; 20415821 ; 570179 ; 570180 ;
Abstract
This invention relates to a process to remove the unsaturated impurities (in particular vinylidene chloride) present in a crude 1,1-dichloro-1-fluoroethane. This process comprises subjecting the product to be purified, in the liquid phase, in the presence of oxygen, to an irradiation by short wavelength UV rays (200 to 360 nm), then washing with an alkaline and/or reducing solution, and drying.