Extractive distillation of hydrocarbon mixtures

Details Extractive distillation of hydrocarbon mixtures Extractive distillation of hydrocarbon mixtures

1990-10-31

1991-07-16

Manoharan, Virginia

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 56, 203 58, 203 64, 585807, 585857, 585860, 585865, B01D 340

Patent

active

050322320

ABSTRACT:
Extractive distillation processes for separating aromatic hydrocarbon(s) or cycloalkane(s) or alkene(s) from close-boiling alkane(s) are carried out with a solvent including at least one N-alkyl-2-thiopyrrolidone compound, preferably N-methyl-2-thiopyrrolidone. Optionally, the solvent additionally contains a cosolvent, preferably tetraethylene glycol or N-(.beta.-mercaptoethyl)-2-pyrrolidone or unsubstituted sulfolane.

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"Extractive Distillation Saves Energy", by Ian Sucksmith, Chemical Engineering, June 28, 1982, pp. 91-95.
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