Separation of olefinic hydrocarbons by extractive distillation

Details Separation of olefinic hydrocarbons by extractive distillation Separation of olefinic hydrocarbons by extractive distillation

1991-07-17

1992-09-29

Manoharan, Virginia

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 58, 585857, 585860, 585865, B01D 340

Patent

active

051511614

ABSTRACT:
The separation of alkadienes from close-boiling alkenes by extractive distillation employes as solvent N-methyl-2-thiopyrrolidone, alone or in admixture with unsubstituted sulfolane (cyclotetramethylene sulfone), or a mixture of unsubstituted sulfone and N-methyl-2-pyrrolidone. The separation of cycloalkadienes from close-boiling alkadienes by extractive distillation employs N-methyl-2-thiopyrrolidone as solvent.

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