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:
Apr. 27, 1999
Filed:
Dec. 17, 1997
Applicant:
Inventors:
John Ivor Hammerman, Arlington Heights, IL (US);
Edith Marie Flanigen, White Plains, NY (US);
Gregory J Gajda, Mount Prospect, IL (US);
Jennifer S Holmgren, Bloomingdale, IL (US);
David A Lesch, Hoffman Estates, IL (US);
Robert Lyle Patton, Rolling Meadows, IL (US);
Thomas Matthew Reynolds, Mobile, AL (US);
Cara Moy Roeseler, Winfield, IL (US);
Assignee:
UOP LLC, Des Plaines, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
885477 ; 585481 ; 585666 ; 585529 ;
Abstract
This invention is drawn to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene using a silicoaluminophosphate molecular sieve which is enriched in framework silicon at the surface, resulting in a greater yield of para-xylene compared to prior-art processes.