Solvent extraction of hydrocarbon oils producing an increased yi

Details Solvent extraction of hydrocarbon oils producing an increased yi Solvent extraction of hydrocarbon oils producing an increased yi

1995-12-05

1997-04-01

Myers, Helane

Mineral oils: processes and products

Fractionation

Liquid extraction with solvents

208311, 208322, 208326, 208335, C10G 2120

Patent

active

056162383

ABSTRACT:
The present invention is directed to an improved selective solvent extraction process wherein a hydrocarbon feed stream containing a mixture of aromatics and non-aromatics is contacted with an aromatics selective solvent in an extraction zone to produce an aromatics rich extract phase and an aromatics lean raffinate phase, water in a carefully controlled amount is added to the recovered extract phase resulting in the separation of the extract phase into a hydrocarbon rich pseudo-raffinate which is recycled to the extraction zone for processing with fresh feed and an increased yield of raffinate of higher quality than is obtained without pseudo-raffinate recycle.

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