Process for aromatics extraction from a 300.degree.-430.degree.

Details Process for aromatics extraction from a 300.degree.-430.degree. Process for aromatics extraction from a 300.degree.-430.degree.

1978-01-05

1979-12-18

Levine, Herbert

Mineral oils: processes and products

Fractionation

Liquid extraction with solvents

208324, 208333, 585864, 585868, C10G 2116, C10G 2128

Patent

active

041793625

ABSTRACT:
Petroleum fractions may be separated into aromatic rich and paraffinic-rich hydrocarbon streams by the use of methanol/water mixtures having at least 10% water by volume. The paraffinic-rich stream is recovered as raffinate and the aromatic-rich as extract. After the extraction step additional water is added to the extract and raffinate streams where it acts as an anti-solvent to effect separation of the hydrocarbon from the solvent. The water and methanol are then separated for example by flash distillation or by using super critical CO.sub.2 as an extraction solvent.

REFERENCES:
patent: 2261780 (1941-11-01), Whiteley
patent: 2695322 (1954-11-01), Weedman
patent: 3173966 (1965-03-01), Jones et al.
patent: 3291728 (1966-12-01), Boyum et al.
patent: 3985644 (1976-10-01), Eberly

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