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:
Sep. 19, 1989
Filed:
Aug. 25, 1988
Pochen Chu, West Deptford, NJ (US);
Albert B Schwartz, Philadelphia, PA (US);
Mobil Oil Corporation, New York, NY (US);
Abstract
A surface-inactive shape selective metallosilicate catalyst, useful for the conversion of lower molecular weight olefins to liquid hydrocarbons such as gasoline, distillate, and high viscosity lube oils, is prepared by forming a silica shell on a medium pore metallosilicate core by crystallizing silica in the presence of fluoride ion onto the surface of the core. A novel catalyst composition is provided comprising an inner core portion and an outer portion disposed as a porous shell around the inner portion, wherein the inner portion consists essentially of metallosilicate zeolite having a medium pore structure, such as ZSM-5 or ZSM-23, and the outer portion comprising a fluoride-containing crystalline shell consisting essentially of silica substantially free of acid sites and having substantially the same crystalline structure as the inner core portion.