Recovery of aromatic hydrocarbons and a non-aromatic...

Details Recovery of aromatic hydrocarbons and a non-aromatic... Recovery of aromatic hydrocarbons and a non-aromatic...

C - Chemistry, Metallurgy

07

C

260/715

C07C 7/10 (2006.01)

Patent

CA 1199341

"RECOVERY OF AROMATIC HYDROCARBONS AND A NON-AROMATIC RAFFINATE STREAM FROM A HYDROCARBON CHARGE STOCK" ABSTRACT A process for the recovery of aromatic hydrocarbons and a non-aromatic raffinate stream from a hydrocarbon charge stock is dis- closed. The hydrocarbon charge stock is treated with an aromatics- selective solvent to provide an aromatics-rich solvent stream and a non-aromatic raffinate stream. The aromatics-rich solvent stream is treated in a stripper column at conditions to separate substantially all of the non-aromatic hydrocarbons therefrom. The rich solvent stream is subjected to steam stripping to provide a high purity aro- matics stream and an aqueous stream comprising the steam condensate and residual aromatics. This aqueous stream is treated with a minor portion of the non-aromatic raffinate to remove the residual aroma- tics, and the resulting aqueous stream is utilized to wash the re- mainder of the raffinate free of solvent. The raffinate stream is recovered substantially free of aromatics.

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