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:
Jun. 13, 1989
Filed:
Oct. 13, 1987
Theodore D Trowbridge, Madison, NJ (US);
Shun C Fung, Bridgewater, NJ (US);
Exxon Research & Engineering Co., Florham Park, NJ (US);
Abstract
This invention relates to a method for treating zeolite-containing catalysts. It is particularly suitable for making catalytic compositions made up of large pore zeolites of which a large percentage of the cationic substitution sites therein contain an alkali or alkaline earth metal and further containing one or more other Group VIII noble metals and a binder. The binder preferably is formed of a particular ratio of alumina from both a sol and boehmite. The step of impregnating the zeolite with a catalytic metal may be carried out at a particular pH range so as to promote aromatics yield after later regeneration. The formed catalyst is treated with a solution of a particular pH at one or more instances either in the catalyst production procedure or after its use to stabilize the catalyst after regeneration. This catalyst is suitable for use as a reforming catalyst or in the production of benzene. The catalyst has quite high activity, selectivity, and excellent physical characteristics.