Hydrotreating catalyst and process

Details Hydrotreating catalyst and process Hydrotreating catalyst and process

1990-08-03

1991-07-30

Myers, Helane E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Hydrogenation

208144, 208145, C10G 4500

Patent

active

050357930

ABSTRACT:
A hydrotreating catalyst is described which comprises at least one Group VI metal, metal oxide, or metal sulfide, and at least one Group VIII metal, metal oxide, or metal sulfide, supported on a carrier wherein (A) the catalyst comprises from about 10% to about 35% by weight of combined metal, and the atomic ratio of the Group VIII metal to Group VI metal is in the range of from about 0.5:1 to about 2:1; (B) the carrier comprises from about 0.5 to about 10 weight percent of halogen, from about 0.5 to about 5% by weight of silica and from about 85 to about 99% of alumina; and (C) the catalyst is characterized as having a median pore radius of from about 30 to about 65 Angstroms, and a surface area of from about 120 to about 180 m.sup.2 /g. Also described are novel and improved procedures for preparing the catalyst is useful in the production of lubricating oils from crude hydrocarbon oil stocks in that the hydrotreating process results in the formation of oils having increased viscosity indexes, reduced aromatic content and improved stability. The catalysts of this invention can be used effectively in either or both stages of a two-stage hydrotreating process or in a single stage hydrotreating process. The nitrogen and sulfur contents of the oils also are reduced through the use of the catalyst in the hydrogenation process.

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