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. 02, 1999
Filed:
Oct. 18, 1996
Applicant:
Inventors:
Yu Kanda, Kitakyushu, JP;
Toshio Uchibori, Kitakyushu, JP;
Takeshi Ishikawa, Kurashiki, JP;
Akio Tsuboi, Kurashiki, JP;
Assignee:
Mitsubishi Chemical Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07C / ;
U.S. Cl.
CPC ...
203 58 ; 203 74 ; 203 81 ; 585808 ; 585860 ; 585865 ;
Abstract
Cyclohexene is separated from a mixture of cyclohexene and at least one of cyclohexane and benzene by subjecting the mixture to extractive distillation in the presence of an extraction solvent the formula: ##STR1## wherein R.sup.1 and R.sup.2 each is a C.sub.1-10 alkyl group or hydrogen, and n is an integer of from 2-4, thereby preparing a fraction rich in cyclohexene.