Shell Oil Comapny

Pq Corporation

Thomas W Hastings

Robert Charles Ryan

Brendan Dermot Murray

Stanley Nemec Milam

Elliot P Hertzenberg

David Allen Cooper

Bruce H Winquist

The mesopore volume in pores of diameters ranging from 2 to 60 nm of zeolite Y materials is increased by the hydrothermal treatment of such zeolites at temperatures above the atmospheric boiling point of the treating solution. Unique zeolites are produced as result of such process.

Process for preparing zeolite Y with increased mesopore volume

The present invention relates to catalysts suitable for hydrogenating aromatics and olefins in hydrocarbon feedstocks boiling between about 125.degree. C. and about 625.degree. C. as well as the process for carrying out the hydrogenation. The catalysts consist of one or more Group VIII noble metal(s) on a support wherein the support is a Y-type zeolite prepared by contacting a starting Y-type zeolite having a unit cell size less than about 24.65, preferably less than about 24.4 angstroms, a silica to alumina molar ratio greater than about 5, preferably by greater than about 25 and an alkali metal content of less than about 0.30, preferably less than about 0.15 percent (basis metal) with one or more aqueous solution(s) comprising alkali(ne-earth) metal ions under conditions sufficient to provide a final alkali metal content (measured in terms of gram equivalent weight per gram of zeolite) of at least about 1.5 times greater than the alkali metal content (measured in terms of gram equivalent weight per gram of zeolite) of the starting zeolite. Preferred Group VIII metals are platinum and palladium and sodium is a preferred alkali(ne-earth) metal.

Hydrogenation catalyst and process

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Barto, PA, United States of America

Thomas W Hastings