Polarity gradient extraction method

Details Polarity gradient extraction method Polarity gradient extraction method

1980-12-04

1984-06-19

Warren, Charles F.

Mineral oils: processes and products

Products and compositions

Lubricating oils

C10G 104

Patent

active

044552165

ABSTRACT:
An improved method for recovering and deasphalting tar sands comprises the use of at least two solvents in an extraction column to establish a liquid polarity gradient within it.

REFERENCES:
patent: 2871180 (1959-01-01), Lowman et al.
patent: 3321394 (1967-05-01), Mills
patent: 4046668 (1977-09-01), Farcasui et al.
patent: 4189376 (1980-02-01), Mitchell

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