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:
Jan. 15, 1991
Filed:
Jan. 10, 1990
Ian A Cody, Clearwater, CA;
Glen P Hamner, Baton Rouge, LA (US);
Exxon Research and Engineering Company, Florham Park, NJ (US);
Abstract
A novel zeolite hydrocracking catalyst which contains NH.sub.4.sup.+ sites, at ambient temperatures, and surface sites constituted of a chemisorbed silica-containing species, and process for producing said catalyst. The process for preparation of the catalyst includes a series of steps: an initial step wherein an acid zeolite, or acid zeolite hydrocracking catalyst, is treated with an agent, e.g., a nitrogen-containing compound, suitably ammonia, to convert the H.sup.+ sites throughout said zeolite framework to NH.sub.4.sup.+ sites, and a subsequent post treatment of said NH.sub.4.sup.+ zeolite with an organosilane to silylate, modify and form on the surface of said zeolite a chemisorbed silica species, e.g., --O--Si(CH.sub.3).sub.3. The surface silylated catalyst is useful for the production of high octane gasoline. When employed at elevated temperatures in a hydrocracking operation the catalyst will evolve ammonia and convert to a surface silylated H.sup.+ zeolite catalyst to produce a high octane gasoline, at low hydrogen consumption.