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US 4,357,265 AGranted
Catalytic cracking catalyst
AssigneeW. R. Grace & Co.
InventorRobert L. Chiang
Life of this patent
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Abstract
Catalysts which produce cracked gasoline having high octane rating are produced by combining a thermally-stabilized/aluminum exchanged type Y zeolite with an inorganic oxide matrix.
Claims11
A process for preparing a cracking catalyst which comprises:
- (a) Exchanging a sodium type Y zeolite with an ammonium salt solution to lower the sodium content of said zeolite to below about 4 percent by weight Na.sub.2 O;
- (b) calcining the ammonium exchanged zeolite at a temperature of from about 537.degree. to 815.degree. C.;
- (c) mixing said calcined zeolite with an inorganic oxide matrix and water;
- (d) spray drying said mixture;
- and
- (e) reacting said spray dried mixture with an acid aluminum salt solution having a pH of from about 2.0 to 3.7 to lower the sodium content to below about 1.0 percent by weight Na.sub.2 O.
3 more elements
Dependencies are inferred from the claim text.