C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/262
C10G 21/28 (2006.01) C10G 21/16 (2006.01)
Patent
CA 1312571
- 35 - ENERGY EFFICIENT AROMATIC EXTRACTION PROCESS ABSTRACT The process for the dearomatization of a mixed hydrocarbon feed which comprises the following steps: (a) contacting said feed in an extraction zone at a temperature of at least about 150°C with an aromatic extraction solvent to provide a solvent phase containing aromatic hydrocarbons and a raffinate phase containing nonaromatic hydrocarbons; (b) cooling said solvent and raffinate phases; (c) introducing said cooled solvent phase to a separation zone and introducing therewith an effective amount of an anti-solvent for said aromatic hydrocarbons in said mixed extraction solvent to provide an extract phase containing aromatic hydrocarbons and a solvent phase containing mixed extraction solvent and anti-solvent; (d) introducing said cooled raffinate phase to a separation zone and introducing therewith an effective amount of an anti-solvent for such aromatic selective solvent in said raffinate phase to provide a raffinate phase containing non-aromatic hydrocarbons and a solvent/anti-solvent phase; (e) adjusting the anti-solvent in said solvent phase and recycling said solvent phase to the extraction zone of step (a); and (f) recovering the extract phase of step (c) and the raffinate phase of step (d). D-13,817
578846
Sim & Mcburney
Uop
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