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US 4,456,693 AGranted
Hydrocracking catalyst
AssigneeW. R. Grace & Co.
InventorWilliam A. Welsh
Life of this patent
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Abstract
A stable, highly active hydrocracking catalyst which contains a rare earth/noble metal exchanged ultrastable type Y zeolite dispersed in an inorganic oxide matrix. The catalyst is hydrated to a moisture level of from about 5 to 30 percent by weight H.sub.2 O prior to activation and use in a hydrocracking process.
Claims6
A process for preparing hydrocracking catalyst which contains:
- (1) a palladium/rare earth ultrastable type Y zeolite which contains from about 0.1 to 2 weight percent Pd and 0.5 to 8 weight percent RE.sub.2 O.sub.3, (2) an inorganic oxide matrix and (3) from about 5 to 30 weight percent H.sub.2 O comprising the steps:
- (a) forming said zeolite and matrix into catalyst particles;
- (b) drying said catalyst particles at a temperature of from about 400.degree. to 600.degree. C. to obtain particles having a moisture content below about 3 weight percent;
- and
- (c) rehydrating the catalyst particles prior to use in a hydrocracking process to obtain the moisture level set forth at (3).
2 more elements
Dependencies are inferred from the claim text.