Process for deasphalting a heavy hydrocarbon feedstock

Details Process for deasphalting a heavy hydrocarbon feedstock Process for deasphalting a heavy hydrocarbon feedstock

1987-05-15

1989-03-07

Davis, Curtis R.

Mineral oils: processes and products

Fractionation

Deasphalting

208 45, 208316, 210726, 210727, C10C 118

Patent

active

048103675

ABSTRACT:
A process for deasphalting a heavy hydrocarbon feedstock, comprising two stages of precipitation from the feedstock of an asphaltene fraction alone or, alternatively, of a resin fraction along with the asphaltene fraction, by means of a heavy solvent and a light solvent, respectively, is disclosed.
In accordance with the process, the heavy solvent and the light solvent both contain, in different proportions, at least one hydrocarbon having 3 carbon atoms and at least one hydrocarbon having at least 5 carbon atoms, the proportion of the hydrocarbon having 3 carbon atoms being higher in the light solvent than in the heavy solvent.

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