Hydrocarbon solvent treatment of bituminous materials

Details Hydrocarbon solvent treatment of bituminous materials Hydrocarbon solvent treatment of bituminous materials

1977-12-19

1978-11-14

Gantz, Delbert E.

Mineral oils: processes and products

Fractionation

Deasphalting

208 45, C10C 308

Patent

active

041254597

ABSTRACT:
This invention relates to the production of oils of specified higher quality at the same yield or to the production of a higher yield of oils of the same quality from a bituminous material by a combination of propane and pentane deasphalting than would otherwise be obtainable by utilizing either propane or pentane deasphalting processes alone. This is effected by subjecting the bituminous material first to a pentane deasphalting process to produce a light fraction containing resins and oils, followed by a propane deasphalting process on the resin-oil fraction previously obtained and the recycle of at least a portion of the resins fraction back to the pentane deasphalting process. Alternatively, this is effected by subjecting the bituminous material first to a propane deasphalting process to produce a heavy fraction containing asphaltenes and resins, followed by a pentane deasphalting process on the asphaltene-resin fraction previously obtained and recycle of at least a portion of the resins fraction back to the propane deasphalting process. The oil thus produced is obtained in higher quality at the same yield or in higher yield at the same quality by virtue of the ability to cut deeper into the residuum than otherwise would be possible.

REFERENCES:
patent: 1988713 (1935-01-01), Bray
patent: 2500757 (1950-03-01), Kiersted, Jr.
patent: 3627675 (1971-12-01), Ditman et al.
patent: 3775292 (1973-11-01), Watkins
patent: 3779902 (1973-12-01), Mitchell et al.
patent: 3830732 (1974-08-01), Gatsis

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