Process for the isolation of monochloroacetaldehyde

Distillation: processes – separatory – With disparate physical separation – Utilizing liquid-liquid extracting of distillation product

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203 71, 203 87, 568478, 568492, 568495, B01D 314, C07C 4714

Patent

active

043115632

ABSTRACT:
The invention relates to a process for the isolation of chloroacetaldehyde which is obtained as a by-product during the synthesis of acetaldehyde from ethylene and air in an aqueous palladium/cupric chloride solution by the 2-stage process. The mixture to be worked-up to chloroacetaldehyde is taken from the acetaldehyde distillation column and transferred to a distillation and extraction system, where it is fractionally condensed. The chloroacetaldehyde-containing fraction is extracted with water and the aqueous extract is subjected to purification distillation.

REFERENCES:
patent: 2702783 (1955-02-01), Harrison et al.
patent: 2947671 (1960-08-01), Veldhuis et al.

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