Selective separation of heavy oil using a mixture of polar and n

Details Selective separation of heavy oil using a mixture of polar and n Selective separation of heavy oil using a mixture of polar and n

1983-06-06

1985-01-15

Gantz, Delbert E.

Mineral oils: processes and products

Fractionation

Deasphalting

208323, 208321, 208 45, C01G 2104, C01G 2106

Patent

active

044937652

ABSTRACT:
A hydrocarbon feedstock may be selectively separated into its various fractions by contact with a mixture of specified polar and nonpolar solvents at a temperature so as to form a two-phase system, separating the first extract and raffinate phases so obtained, cooling the raffinate (nonpolar) phase so that three phases form, and separating the three phases. The three phases obtained consist of the polar solvent containing low molecular weight polars, the nonpolar solvent containing the saturates and aromatics, and an asphaltene-containing phase. The asphaltene-containing phase may be further washed to yield an asphalt with a higher microcarbon residue than the non-washed asphalt.

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