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:
Mar. 29, 2005
Filed:
Jan. 06, 2000
Applicants:
Susan C. Koster, South Elgin, IL (US);
Jennifer S. Holmgren, Bloomingdale, IL (US);
Inventors:
Susan C. Koster, South Elgin, IL (US);
Jennifer S. Holmgren, Bloomingdale, IL (US);
Assignee:
UOP LLC, Des Plaines, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C005/52 ; B01J029/06 ;
U.S. Cl.
CPC ...
Abstract
An improved catalytic composite and process are disclosed for the selective disproportionation of toluene. The process uses a layered composite comprising a catalytically active core which comprises a zeolitic aluminosilicate having a SiO:AlOratio of 8 to 50 and a relatively inactive protective mantle which preferably comprises boralite. Optionally, the composite is selectively precoked prior to toluene disproportionation. The composite and process provide improved selectivity for the production of paraxylene.