Middle distillate selective hydrocracking process

Details Middle distillate selective hydrocracking process Middle distillate selective hydrocracking process

1998-10-23

1999-07-20

Myers, Helane

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

2081113, 208108, 208110, 208112, 208143, 208216PP, 208217, 208209, 208216R, C10G 4716

Patent

active

059252359

ABSTRACT:
A layered hydrocracking catalyst system has high middle distillate selectivity when used for hydrocracking a high sulfur and high nitrogen containing feedstock. The layered system comprises a first layer catalyst with contains a zeolite having a unit cell size of greater than about 24.35 Angstroms, and a second layer catalyst which contains a zeolite having a unit cell size of less than about 24.30 Angstroms. The layered system is particularly beneficial in terms of catalyst life and product selectivity for reactors operated under conditions of a high temperature profile.

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