Process for extracting fixed and mineral oils

Details Process for extracting fixed and mineral oils Process for extracting fixed and mineral oils

2005-05-10

2005-05-10

Griffin, Walter D. (Department: 1764)

Mineral oils: processes and products

Fractionation

Liquid extraction with solvents

C208S313000, C208S315000, C208S320000, C208S340000

Reexamination Certificate

active

06890424

ABSTRACT:
The present invention relates to a method of extracting and concentrating oils from materials in which the oils are already dispersed. More particularly, the present invention is concerned with the extraction of fixed oils or mineral oils from materials using a process of solvent extraction which is performed under elevated pressure and temperature. The solvent medium may be HFC 134a alone, or HFC 134a in combination with a suitable co-solvent which can be determined in accordance with the invention.

REFERENCES:
patent: 4331695 (1982-05-01), Zosel
patent: 5005655 (1991-04-01), Stokke et al.
patent: 616 821 (1994-09-01), None
patent: 2 276 392 (1994-09-01), None
patent: 2 320 024 (1998-06-01), None
patent: WO 9526794 (1995-10-01), None
Eldridge, R.B., “Oil Contaminant Removal from Drill Cuttings by Supercritical Extraction,”Ind. Eng. Chem. Res., 35(6):1901-1905, 1996.

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