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. 21, 1977
Filed:
Mar. 11, 1976
Jacques Helgorsky, Eaubonne, FR;
Rhone-Poulenc Industries, Paris, FR;
Abstract
A method of partially or totally separating C.sub.1 to C.sub.3 chlorinated aliphatic hydrocarbons from mixtures of at least two of such compounds; a liquid-liquid operation is carried out on such mixtures in the presence of one or more extraction agents having at least partial water-miscibility, the extraction agents being selected from the group of aprotic polar solvents, from the group of polyhydric alcohols, more particularly C.sub.2 to C.sub.7 saturated aliphatic polyhydric alcohols, C.sub.4 to C.sub.8 polyglycols, and glycol monoethers, more particularly C.sub.3 to C.sub.8 saturated aliphatic monoethers and the use of this process for the separation of mixtures comprising or essentially consisting of 1,2-dichloroethane and trichloroethylene.