Hydrocarbon conversion catalysts and processes utilizing the same
AssigneeExxon Research & Engineering Co.
InventorsElroy M. Gladrow, William E. Winter, William L. Schuette
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Abstract
A catalyst, having a specified amount of rare earth metal content and a specified amount of alkali metal content, suitable for conversion of hydrocarbon oils to lower boiling products comprises a crystalline aluminosilicate zeolite, such as zeolite Y, an inorganic oxide matrix and, optionally discrete particles of alumina dispersed in the matrix. The zeolite prior to being composited with the matrix has a unit cell size above about 24.5 Angstroms. A cracking process utilizing the catalyst is also provided.
Claims15
A process for the catalytic cracking of a hydrocarbon feedstock, which comprises:
- contacting said feedstock at catalytic cracking conditions with a catalyst comprising:
- (a) a crystalline aluminosilicate zeolite having uniform pore diameters ranging from about 6 to about 15 Angstroms, and a silica to alumina mole ratio of at least about 3;
- (b) an inorganic oxide matrix,
- said zeolite prior to being composited with (b) having a unit cell size greater than about 24.5 Angstroms, and said catalyst having an alkali metal content such that the ratio of weight percent alkali metal, calculated as the alkali metal oxide, based on the total catalyst, divided by the weight percent zeolite based on the total catalyst is not greater than 0.024 and a rare earth metal content such that the ratio of weight percent rare earth metal oxide, based on the total catalyst, divided by the weight percent zeolite based on the total catalyst ranges from about 0.01 to about 0.08.
Dependencies are inferred from the claim text.