Distillation: processes – separatory – Adding material to distilland except water or steam per se – At least two materials
Patent
1990-10-26
1992-02-04
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, 585809, 585865, 585857, B01D 340
Patent
active
050857401
ABSTRACT:
An extractive distillation process for separating at least one C.sub.4 -C.sub.10 alkene (monoolefin) from at least one close-boiling alkane (paraffin) employs as solvent a mixture of (a) at least one N-alkyl-2-pyrrolidone, preferably N-methyl-2-pyrrolidone and either (b1) at least one sulfolane compound (preferably cyclotetramethylene sulfone) or (b2) at least one glycol compound (preferably tetraethylene glycol) or both (b1) and (b2).
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Brown Ronald E.
Lee Fu-Ming
Brandes K. K.
Manoharan Virginia
Phillips Petroleum Company
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