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:
Jan. 01, 2013
Filed:
Sep. 30, 2010
James R. Lattner, La Porte, TX (US);
Mark P. Hagemeister, Houston, TX (US);
Jon Edmond Randolph Stanat, Westhampton Beach, NY (US);
John Di-yi Ou, Houston, TX (US);
Xiaobo Zheng, Houston, TX (US);
LU Han, Herndon, VA (US);
James R. Lattner, La Porte, TX (US);
Mark P. Hagemeister, Houston, TX (US);
Jon Edmond Randolph Stanat, Westhampton Beach, NY (US);
John Di-Yi Ou, Houston, TX (US);
Xiaobo Zheng, Houston, TX (US);
Lu Han, Herndon, VA (US);
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
In a process for the production of para-xylene, methanol is preheated to a first temperature, an aromatic feedstock comprising toluene and/or benzene is preheated to a second temperature and the preheated methanol and aromatic feedstocks are fed to a reactor at a first methanol to aromatic feedstock molar ratio. The preheated aromatic feedstock is contacted with the preheated methanol under alkylation conditions in the reactor in the presence of a catalyst so that the methanol reacts with the aromatic feedstock to produce an effluent comprising para-xylene. During the reaction, a temperature is measured within the reactor and is compared with a predetermined optimal temperature. The methanol to aromatic feedstock molar ratio is then adjusted in a manner to reduce any difference between the measured and predetermined optimal temperatures in the reactor.