Process for preparing a very high quality lube base stock oil

Details Process for preparing a very high quality lube base stock oil Process for preparing a very high quality lube base stock oil

C - Chemistry, Metallurgy

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G

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C10G 45/08 (2006.01) C10G 45/50 (2006.01)

Patent

CA 1280989

F-3532 PROCESS FOR PREPARING A VERY HIGH QUALITY LUBE BASE STOCK OIL ABSTRACT OF THE DISCLOSURE A process for obtaining a very high quality lube base stock is disclosed which comprises: (a) introducing an aromatic and nitrogen-and sulfur- containing feedstock selected from a dewaxed oil obtained from refining distillate fraction and having a 60 to 700 SUS at 38°C (100°F) and a dewaxed oil obtained from refining vacuum resid and having a 2300 to 2700 SUS at 38°C (100°F), and hydrogen, into a single stage hydrotreating reactor; and, (b) subjecting the feedstock to hydrotreating in the reactor in the presence of a sulfided cobalt/molybdenum hydrotreating catalyst at an average reactor temperature of from 288° to 371°C (550 to 700°F) at a hydrogen partial pressure of 10340 to 20680 kPa.a (1500 to 3000 psia) at the reactor outlet, an LHSV of 0.1 to 1.0 and a hydrogen circulation rate of 53.4 to 445 vol/vol (300 to 2500 SCF per barrel).

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