Hydrocracking catalyst

摘要

Process of preparing a hydrocracking catalyst carrier comprising amorphous binder and zeolite Y, which process comprises subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700 to 1000° C., hydrocracking catalyst carrier comprising amorphous binder and zeolite Y having a silica to alumina molar ratio of at least 10, the infrared spectrum of which catalyst has a peak at 3690 cm−1, substantially reduced peaks at 3630 cm−1 and 3565 cm−1 and no peak at 3600 cm−1, hydrocracking catalyst carrier comprising an amorphous binder and zeolite Y having a silica to alumina molar ratio of at least 10, which catalyst has an acidity as measured by exchange with perdeuterated benzene of at most 20 micro-mole/gram, hydrocracking catalyst derived from such carrier and hydrocracking process with the help of such catalyst.

主权项

1. A process of preparing a hydrocracking catalyst carrier for use in the preparation of a hydrocracking catalyst having enhanced gas oil selectivity, wherein said hydrocracking catalyst carrier comprises an amorphous binder and zeolite Y, wherein said process comprises: calcining zeolite Y, having a silica to alumina molar ratio of at least 10, in the absence of added steam at a temperature in the range of from 700° C. to 1000° C. followed by mixing the obtained zeolite Y with said amorphous binder, comprising silica-alumina containing silica in an amount in the range of from 25 to 95% by weight as calculated on the carrier alone, and an acidic aqueous solution in amount so as to provide a mixture having a pH in the range of from 4.4 to 5.7 and an LOI in the range of from 50 to 65% such that said hydrocracking catalyst carrier has a monomodal pore size distribution, wherein at least 50% of the total pore volume is present in pores having a diameter in the range of from 4 to 50 nm; extruding said mixture to give an extrudate; and calcining said extrudate at a temperature of from 700 to 1000° C.