Process for the preparation of a lubricant

Details Process for the preparation of a lubricant Process for the preparation of a lubricant

2003-12-05

2009-12-29

Caldarola, Glenn A (Department: 1797)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

C208S108000, C208S111050, C208S120050, C208S137000

Reexamination Certificate

active

07638037

ABSTRACT:
Process to prepare a lubricant having a dynamic viscosity at −35° C. of below 5000 cP by performing the following steps: a) contacting a feed containing more than 50 wt % wax in the presence of hydrogen with a catalyst comprising a Group VIII metal component supported on a refractory oxide carrier, and b) contacting the effluent of step (a) with a catalyst composition comprising a noble Group VIII metal, a binder and zeolite crystallites of the MTW type to obtain a product having a lower pour point than the effluent of step (b) and having a viscosity index greater than 120, and (c) adding a pour point depressant additive to the base oil as obtained in step (b).

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