Process to prepare base oil from a Fisher-Tropsch synthesis...

Details Process to prepare base oil from a Fisher-Tropsch synthesis... Process to prepare base oil from a Fisher-Tropsch synthesis...

2004-07-02

2010-06-01

Nguyen, Tam M (Department: 1797)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

C208S061000, C208S069000, C208S107000, C208S134000, C585S736000, C585S738000

Reexamination Certificate

active

07727376

ABSTRACT:
A process to prepare base oils from a Fischer-Tropsch synthesis product by(a) separating the Fischer-Tropsch synthesis product into a fraction (i) boiling in the middle distillate range and below, a heavy ends fraction (iii) and an intermediate base oil precursor fraction (ii) boiling between fraction (i) and fraction (iii),(b) subjecting the base oil precursor fraction (ii) to a catalytic hydroisomerisation and catalytic dewaxing process to yield one or more base oil grades,(c) subjecting the heavy ends fraction (iii) to a conversion step to yield a fraction (iv) boiling below the heavy ends fraction (iii) and(d) subjecting the high boiling fraction (v) of fraction (iv) to a catalytic hydroisomerisation and catalytic dewaxing process to yield one or more base oil grades.

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International Search Report dated Dec. 7, 2004 (PCT/EP2004/051349).

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