Process to prepare a lubricating base oil

Details Process to prepare a lubricating base oil Process to prepare a lubricating base oil

2004-06-21

2010-10-19

Hill, Jr., Robert J (Department: 1797)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

C208S018000, C208S019000, C208S046000, C208S049000, C208S068000, C208S078000

Reexamination Certificate

active

07815789

ABSTRACT:
A process to prepare a base oil having a viscosity index of above 80 and a saturates content of above 90 wt % from a crude derived feedstock by(a) contacting a crude derived feedstock in the presence of hydrogen with a catalyst having at least one Group VIB metal component and at least one non-noble Group VIII metal component supported on a refractory oxide carrier;(b) adding to the effluent of step (a) or part of the effluent of step (a) a Fischer-Tropsch derived fraction boiling at least partly in the base oil range in an amount effective to achieve the target viscosity index of the final base oil; and(c) dewaxing the mixture as obtained in step (b).

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