Production of extra-heavy lube oils from Fischer-Tropsch wax

Details Production of extra-heavy lube oils from Fischer-Tropsch wax Production of extra-heavy lube oils from Fischer-Tropsch wax

2005-06-17

2008-12-16

Caldarola, Glenn (Department: 1797)

Mineral oils: processes and products

Fractionation

Liquid extraction with solvents

C208S096000, C208S322000, C208S950000, C518S724000

Reexamination Certificate

active

07465389

ABSTRACT:
Extra heavy lube base stocks are separated from heavy lube oils with a polar solvent in an amount sufficient to form a first light phase and a second heavy phase. The phases are then separated and the solvent is removed from the second heavy phase to yield an extra heavy lube.

REFERENCES:
patent: 4911821 (1990-03-01), Katzer et al.
patent: 6420618 (2002-07-01), Berlowitz et al.
patent: 2004/0045868 (2004-03-01), Germaine
patent: WO 02/70629 (2002-09-01), None
patent: WO 2004/033596 (2004-04-01), None

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