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. 04, 2015
Filed:
Jul. 25, 2012
LU Han, Herndon, VA (US);
Rathna P. Davuluri, Fairfax, VA (US);
Christopher G. Smalley, Manassas, VA (US);
Mark P. Hagemeister, Houston, TX (US);
Masaaki Sugita, McLean, VA (US);
Joseph S. Famolaro, Ashburn, VA (US);
Robert G. Tinger, Friendswood, TX (US);
Lu Han, Herndon, VA (US);
Rathna P. Davuluri, Fairfax, VA (US);
Christopher G. Smalley, Manassas, VA (US);
Mark P. Hagemeister, Houston, TX (US);
Masaaki Sugita, McLean, VA (US);
Joseph S. Famolaro, Ashburn, VA (US);
Robert G. Tinger, Friendswood, TX (US);
ExxonMobil Chemical Patents Inc., Baytown, TX (US);
Abstract
The invention relates to a process of alkylating aromatic hydrocarbons, and more particularly a process of making paraxylene by alkylation of benzene and/or toluene with methanol and/or dimethyl ether, and to an apparatus for carrying out said process, the improvement comprising staged injection of one of the reactants, with the stages separated by structured packing so as to minimize at least one of gas phase back-mixing, by-pass phenomena, and gas bubble size.