Method of working up an overhead product of an extractive distil

Details Method of working up an overhead product of an extractive distil Method of working up an overhead product of an extractive distil

1990-01-19

1991-07-16

Manoharan, Virginia

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

202176, 202204, 203 75, 203 78, 203 80, 203 82, 203 84, 203DIG25, 208349, 208355, 208364, 210521, 210522, 210802, 210DIG5, B01D 340

Patent

active

050317547

ABSTRACT:
A hydrocarbon material of the starting product is separated in an extractive distillation column in which an N-substituted morpholine whose substituents do not have more than seven carbon atoms is used as a selective solvent. The overhead product comes down as a top product of the extractive distillation and is fed through a coalescer in which the sump product comes down with a solvent content of 20 to 75% by weight at a temperature of 20.degree. to 70.degree. C. and subsequent to that is fed into a separating vessel. There it is separated into a heavier and lighter phase. After that the heavier phase is conducted into an extractive distillation column and the lighter phase into the overhead product distillation column.

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Caulson et al., "Chemical Engineering", vol. Two, Third Edition, p. 600.

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