Simultaneous deasphalting-extraction process

Details Simultaneous deasphalting-extraction process Simultaneous deasphalting-extraction process

1977-12-22

1978-11-14

Levine, Herbert

Mineral oils: processes and products

Fractionation

Deasphalting

208321, 208323, C10G 2104

Patent

active

041254589

ABSTRACT:
An asphalt containing mineral oil is simultaneously deasphalted and extracted in a combination zone by contacting the oil with a solvent comprising N-methyl-2-pyrrolidone (NMP) containing from 0-5 LV% water and a light hydrocarbon to produce a raffinate and extract phase, with the raffinate phase containing the desired oil, most of the hydrocarbon solvent and some NMP. The raffinate is then passed to a reduced pressure zone to remove most of the hydrocarbon solvent therefrom. The remaining raffinate oil and NMP solution is then chilled to produce bulk liquid-liquid immiscibility between the oil and NMP. The chilled oil and NMP are then passed to a settling zone wherein the NMP is separated from the oil and recycled back into the combination zone.

REFERENCES:
patent: 3291718 (1966-12-01), Biribauer et al.
patent: 3779895 (1973-12-01), Wilson et al.
patent: 3779896 (1973-12-01), Woodle
patent: 3816295 (1974-06-01), Coleman et al.

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