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US 5,573,657 AGranted
Hydrogenation process
AssigneeMobil Oil Corporation
InventorsThomas F. Degnan, Richard C. Dougherty, George H. Hatzikos, Stuart S. Shih, Tsoung Y. Yan
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AssigneeMobil Oil Corporation
InventorsThomas F. Degnan, Richard C. Dougherty, George H. Hatzikos, Stuart S. Shih, Tsoung Y. Yan
Estimating the term…
A hydrogenation process for reducing the unsaturation of lubricants uses a catalyst which is based on an ultra-large pore crystalline material. The crystalline material has pores of at least 13 .ANG. diameter arranged in a uniform manner and exhibits unusually large sorption capacity demonstrated by its benzene adsorption capacity of greater than about 15 grams benzene/100 grams (50 torr and 25.degree. C.). A preferred form of the catalyst has a hexagonal structure which exhibits a hexagonal electron diffraction pattern that can be indexed with a d.sub.100 value greater than about 18 .ANG.. The hydrogenation catalysts based on these materials are capable of reducing the unsaturation in poly alpha olefin lubricants to a low level.
A process for hydrogenating a lubricant hydrocarbon which comprises contacting a hydrocarbon lubricant feed having a bromine number greater than 5 in the presence of hydrogen with a hydrogenation catalyst containing a noble metal hydrogenation component on a support comprising an inorganic, porous crystalline phase material having pores with diameters of at least about 13 Angstrom Units and exhibiting, after calcination, an X-ray diffraction pattern with at least one peak at a d-spacing greater than about 18 .ANG. with a relative intensity of 100, to produce a lubricant product having a bromine number less than 3.
A process for hydrogenating a poly-alphaolefin lubricant having a bromine number of at least 5, which comprises contacting the lubricant in the presence of hydrogen with a hydrogenation catalyst containing a noble metal hydrogenation component on a support comprising an inorganic, porous crystalline phase material having a uniform, hexagonal arrangement of uniformly sized pores with diameters of at least about 13 .ANG., a benzene adsorption capacity of greater than about 15 grams benzene per 100 grams of the crystalline phase material at 50 torr and 25.degree. C. and which exhibits, after calcination, an X-ray diffraction pattern with at least one peak at a d-spacing greater than about 18 .ANG. with a relative intensity of 100, and a hexagonal electron diffraction pattern that can be indexed with a d.sub.100 value greater than about 18 .ANG., to reduce the bromine number to a value of not more than 3.
Dependencies are inferred from the claim text.