Distillation: processes – separatory – Adding material to distilland except water or steam per se – At least two materials
Patent
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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Brown Ronald E.
Lee Fu-Ming
Brandes K. K.
Manoharan Virginia
Phillips Petroleum Company
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