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. 27, 2019
Filed:
May. 17, 2017
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
Georgia Tech Research Corporation, Atlanta, GA (US);
Michael W. Weber, Houston, TX (US);
Yoshiaki Kawajiri, Nagoya, JP;
Michael Salciccioli, Houston, TX (US);
John R. Porter, Lake Michigan, MI (US);
Gaurav Agrawal, Raritan, NJ (US);
Dana L. Pilliod, League City, TX (US);
Siwei Guo, Atlanta, GA (US);
Jason Bentley, Duluth, GA (US);
EXXONMOBIL CHEMICAL PATENTS INC., Baytown, TX (US);
GEORGIA TECH RESEARCH CORPORATION, Atlanta, GA (US);
Abstract
A process to separate paraxylene from a mixture of paraxylene, metaxylene, orthoxylene, and ethylbenzene in a commercial simulated moving bed apparatus in a reduced number of beds is provided, allowing an additional separation to be conducted in the remaining beds. This additional separation may separate another xylene isomer, ethylbenzene, or a non-aromatic Chydrocarbon from the raffinate stream produced by the first separation. A PowerFeed process is used to recover paraxylene in a first adsorption zone containing 8-16 beds of a conventional 24-bed simulated moving bed adsorption apparatus, and then a second separation may be conducted in a second adsorption zone containing the remaining beds.