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:
Oct. 22, 2019
Filed:
Sep. 22, 2015
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
Xiaobo Zheng, Houston, TX (US);
Robert G. Tinger, Friendswood, TX (US);
Timothy P. Bender, Houston, TX (US);
Kathleen M. Keville, Beaumont, TX (US);
Jeffrey L. Andrews, Houston, TX (US);
ExxonMobil Chemical Patents Inc., Baytown, TX (US);
Abstract
A process is provided for producing xylene by transalkylation including introducing sulfur into a reactor containing a catalyst system prior to first introduction of hydrocarbon feedstock into the reactor; introducing hydrocarbon feedstock into the reactor upon the concentration of sulfur downstream of the catalyst system meeting a predetermined sulfur breakthrough concentration; continuing sulfur introduction for a period of time after first introducing hydrocarbon feedstock into the reactor; reducing the concentration of sulfur introduced upon ΔT decreasing to or below a predetermined sulfur reduction threshold; and discontinuing sulfur introduction upon ΔT decreasing to or below a predetermined sulfur shutoff threshold.