GB1143563A - - Google Patents

Abstract

1,143,563. Hydrocracking; hydrotreating. SINCLAIR RESEARCH Inc. 26 July, 1967 [29 July, 1966], No. 34347/67. Heading C5E. A process for producing a hydrocarbon lubricating oil possessing a high viscosity index, low aromatic content and low pour point, comprises contacting a wax-containing, mixed base, mineral oil distillate of lubricating viscosity with a hydrogen-rich gas in the presence of a sulphur-resistant hydrogenation catalyst at a temperature of 600‹ to 725‹ F., a pressure of 1000 to 3000 p.s.i.g., a weight hourly space velocity of from 0À2 to 1, and a hydrogenfeed rate of 1000 to 5000 SCF/B to provide a hydrogenated oil, and further contacting said hydrogenated oil with a hydrogen-rich gas in the presence of a halogen-promoted platinum group metal alumina catalyst at a temperature of 750‹ to 800‹ F., a pressure of 1000 to 3000 p.s.i.g., a weight hourly space velocity of 0À25 to 0.5, and a hydrogen feed rate of 1500 to 6000 SCF/B to produce the refined mineral lubricating oil product. The catalyst used in the first hydrogenation stage may comprise tin, vanadium, chromium, molybdenum, tungsten, iron, cobalt or nickel, and may be in the form of oxides or sulphides. Mixtures of these materials may be employed, for example, nickel molybdate, tungstate, chromate, thiomolybdate, thiotungstate or thiochromate or mixtures of nickel or cobalt oxides with molybdenum, tungsten or chromium oxides. The catalyst may be supported on alumina. The catalyst used in the second stage may comprise platinum, palladium, rhodium or iridium promoted by a small amount of chlorine or fluorine, supported on alumina. The catalyst support may contain minor amounts of silica, magnesia, titania, zirconia, or natural or activated clays.