Process and device for the separation of mixtures which form an

Details Process and device for the separation of mixtures which form an Process and device for the separation of mixtures which form an

1981-09-30

1982-09-14

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Distilling to separate or remove only water

From organic compound

203 21, 203 23, 203 25, 203 64, 203 78, 203 84, 203 98, 203DIG13, 203DIG19, 202154, B01D 340, C07C 2980

Patent

active

043494161

ABSTRACT:
A process and apparatus for the separation of components from a mixture which forms an azeotrope is disclosed by subjecting the mixture to extractive distillation to remove one of the components and regeneration to separate another component from the extracting agent added to the extractive distillation column. According to the invention, a first side stream is withdrawn from the extractive distillation column, passed in heat exchange with the bottoms from the extractive distillation column en route to the regeneration column and returned to the extractive distillation column at a point below the point at which it is withdrawn. A second side stream from the extractive distillation column is withdrawn, passed in heat exchange with the bottoms of the regeneration zone and returned to the extractive distillation column. For this purpose, separate heat exchangers are used for the respective side streams.

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patent: 2593931 (1952-04-01), Stearns
patent: 3464896 (1969-09-01), Washall
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patent: 4280880 (1981-07-01), Vora et al.
patent: 4292140 (1981-09-01), Kawasaki et al.
patent: 4306942 (1981-12-01), Brush et al.

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