Process for recovering pure benzene

Details Process for recovering pure benzene Process for recovering pure benzene

1980-07-28

1981-11-10

Sever, Frank

Distillation: processes, separatory

With disparate physical separation

Utilizing liquid sorption of component from gas or vapor

203 58, 203 75, 203 77, 203 78, 203 80, 203 82, 203 84, 203 93, 203 94, 585808, 585833, 585857, 585860, 585862, 585865, B01D 310, B01D 340

Patent

active

042996678

ABSTRACT:
A process for recovering pure benzene from hydrocarbon mixtures containing the same and non-aromatic compounds which are gaseous and difficultly condensible is described in which the feedstock is fed to an initial distillation column operated at atmospheric or sub-atmospheric pressure. Overhead comprising benzene and non-aromatics is obtained and a portion thereof condensed. The condensible material is in part returned to the distillation column and in part subjected to extractive distillation to recover pure benzene. Those components which did not condense, i.e. the non-condensible and difficultly condensible components and entrained aromatics are fed to a reflux vessel such as a scrubber, stripper, or the like for recovery of any benzene or other valuable components which might be soluble in a selective solvent and used for such recovery. The selective solvent can be the same solvent used for the extractive distillation.

REFERENCES:
patent: 2842484 (1958-07-01), Fleck
patent: 4070408 (1978-01-01), Vickers

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