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. 15, 2005
Filed:
Mar. 19, 2003
Dejin Kong, Shanghai, CN;
Weisheng Yang, Shanghai, CN;
Hongli Guo, Shanghai, CN;
Huaying LI, Shanghai, CN;
Dejin Kong, Shanghai, CN;
Weisheng Yang, Shanghai, CN;
Hongli Guo, Shanghai, CN;
Huaying Li, Shanghai, CN;
China Petroleum & Chemical Corporation, Bejing, CN;
Shanghai Research Institute of Petrochemical Technology Sinopec, Shanghai, CN;
Abstract
A complete new process for producing p-xylene is provided to solve the problems in the prior arts of the great amount of benzene as a by-product and the requirement of low content of Cheavy aromatics in the feedstock. The process comprises first subjecting benzene and Caromatics to alkyl transfer reaction to produce toluene and Caromatics, then conducting toluene selective disproportionation, and molecular sieve adsorptive separation and isomerization of Caromatics, to obtain p-xylene.