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. 20, 1990
Filed:
Oct. 04, 1988
Applicant:
Inventors:
Tamio Onodera, Matsuyama, JP;
Akio Namatame, Matsuyama, JP;
Assignee:
Teijin Petrochemical Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
585481 ; 585828 ;
Abstract
A process for producing m-xylene, which comprises isomerizing a hydrocarbon material containing o-xylene as a main ingredient in the presence of a catalyst composition comprising zeolite ZSM-4 and/or zeolite omega under such conditions that m-xylene is selectively formed, and recovering m-xylene by distillation from the resulting isomerization mixture containing o-xylene and m-xylene as main ingredients.