Process to prepare a base oil

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

2005-11-18

2010-02-02

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

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural parallel stages of chemical conversion

C208S078000, C208S134000, C208S135000, C208S136000, C208S137000, C208S138000, C208S141000

Reexamination Certificate

active

07655134

ABSTRACT:
Process to optimize the yield of base oils from a Fischer-Tropsch derived feed by performing the following steps (a) performing a hydroconversion/hydroisomerization step on part of the Fischer-Tropsch derived feed; (b) performing a hydroconversion/hydroisomerization step on another part of the Fischer-Tropsch feed at a conversion greater than the conversion in step (a); and (c) isolating by means of distillation a fraction boiling in the base oil range from the two reaction products obtained in steps (a) and (b) and performing a pour point reducing step on said fraction.

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