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:
May. 04, 1993
Filed:
Dec. 24, 1990
James G Vassilakis, New York, NY (US);
Donald F Best, Mahopac, NY (US);
UOP, Des Plaines, IL (US);
Abstract
Novel catalyst compositions comprising a metal hydrogenation component and a modified form of zeolite Y are found to be highly effective in the hydrocarbon conversion processes carried out in the presence of added hydrogen and involving hydrogenation as an essential reaction mechanism. The modified form of zeolite Y is prepared from a starting zeolite Y which has been ammonium cation exchanged to lower the alkali metal content to less than 3.0 weight percent. The starting composition is then steamed at temperatures above about 550.degree. C. to reduce the unit cell dimension and then contacted with an aqueous ammonium ion solution having a pH below about 4 to increase the bulk Si/Al.sub.2 ratio to the range of about 6.5 to 20.