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:
Aug. 10, 2004
Filed:
Oct. 22, 2002
Zaiku Xie, Shanghai, CN;
Weisheng Yang, Shanghai, CN;
Dejin Kong, Shanghai, CN;
Dongmao Zhu, Shanghai, CN;
China Petroleum & Chemical Corporation, Beijing, CN;
Abstract
The present invention relates to a process for the selective disproportionation of toluene and the disproportionation and transalkylation of toluene and C aromatics to mainly solve the problems in the prior arts of the great amount of recycle stream, high energy consumption or harsh requirement for the reaction feedstocks. The present invention has better solved these problems by the technical solution using a process for selective disproportionation of toluene to produce mixed xylenes containing a high concentration of p-xylene, and subsequent disproportionation and transalkylation of C aromatics and toluene to produce benzene and the mixed xylenes which are in the thermodynamic equilibrium. The process is applicable to the industrial production.