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

Simultaneous deasphalting-extraction process

Solvent deasphalting

Solvent deasphalting by polarity gradient extraction

Solvent deasphalting in solid phase

Solvent deasphalting process by solvent recovery at staged press

Solvent deasphalting unit and method for using the same

Solvent deasphalting unit capable of generating power

Solvent extraction

Solvent extraction process

Solvent for refining of residues

Solvent refining of residues

Supercritical extraction process

Supercritical process for producing deasphalted demetallized and

Supercritical selective extraction of hydrocarbons from asphalti