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:
Mar. 31, 1987
Filed:
Oct. 17, 1985
Applicant:
Inventors:
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
585486 ; 585489 ;
Abstract
A method for selectively dealkylating a 1,4-dialkylbenzene in a dialkylbenzene mixture is disclosed, comprising contacting the mixture with a zeolite catalyst which is prepared by the steps of: (1) hydrothermally synthesizing a zeolite from a system in which an alkali metal cation and an organic cation or its precursor coexist and then calcining the zeolite; and (2) modifying the zeolite with a metal or metalloid oxide. This method permits selective dealkylation of a 1,4-dialkylbenzene while maintaining the yield and purity of olefins formed during the dealkylation at high levels.