Preparation of a hydrotreating catalyst.

摘要

A hydrotreating catalyst, useful in the production of lubricating oils from crude hydrocarbon oil stocks, 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, is prepared by (A) preparing a catalyst carrier comprising halogen, silica and alumina; (B) impregnating said carrier with a solution comprising at least one Group VI metal salt and at least one Group VIII metal salt; (C) drying the impregnated carrier; and (D) calcining the dried impregnated carrier. The resultant catalyst may be sulfided prior to use. Preferably, the catalyst comprises from 10% to 35% by weight of combined metal, and the atomic ratio of the Group VIII metal to Group VI metal is from 0.5:1 to 2:1; the carrier comprises from 0.5 to 10 weight percent of halogen, from 0.5 to 5% by weight of silica and from 85 to 99% of alumina; and the catalyst has a median pore radius of from 30 to 65 Angstroms, and a surface area of from 120 to 180 m<2>/g.