Catalyst for hydrotreatment of distillates of petroleum and meth

Details Catalyst for hydrotreatment of distillates of petroleum and meth Catalyst for hydrotreatment of distillates of petroleum and meth

1986-01-09

1988-05-10

Sneed, Helen M. S.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Boron or compound containing same

502202, 502204, 502207, 502208, 502210, 502211, 502213, 502221, 208114, 208123, 208124, 208216R, 208217, B01J 2102, B01J 2714, B01J 27188, B01J 2719

Patent

active

047435747

ABSTRACT:
A cobalt-molybdenum catalyst and a method for preparing same, said catalyst useful for the hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) of distillates of petroleum. The catalyst is supported by aluminum phosphate or an aluminum borate. In a preferred embodiment the catalyst has a low cobalt content, between 0.5% and 2.0% by weight calculated as CoO, and a molybdenum content of between 10% and 20% by weight, calculated as MoO.sub.3. The phosphorus or boron compounds added to the aluminum before the impregnation of the active metals prevents the formation of undesirable compounds of the CoAl.sub.2 O.sub.4 type, which is inactive in HDS. It is for that reason that the catalyst has a formulation with 70% less cobalt than the previous state-of-the-art catalysts. Very small crystals, highly dispersed on the surface of the catalyst, whose formula is CoMoO.sub.4, are responsible for the stability and the high level of activity in HDS and HDN which results.

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