Process for the co-production of dichloroacetaldehyde hydrate an

Details Process for the co-production of dichloroacetaldehyde hydrate an Process for the co-production of dichloroacetaldehyde hydrate an

1994-07-07

1995-06-20

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568491, 568492, C07C 4563, C07C 4500

Patent

active

054262402

ABSTRACT:
A process for producing dichloroacetaldehyde hydrate together with chloral from acetaldehyde or para-aldehyde. The process comprises a step of chlorinating acetaldehyde or para-aldehyde to obtain a chlorinated solution containing dichloroacetaldehyde as a major component, a step of distilling this chlorinated solution to obtain a distillate having a boiling point of 90.degree.-100.degree. C. and containing 50% or more of dichloroacetaldehyde, a step of adding water to this distillate, crystallizing dichloroacetaldehyde hydrate, and separating the crystals, and a step of chlorinating the remaining aldehyde components into chloral. The process enables dichloroacetaldehyde hydrate to be separated at a high purity and the raw materials to be utilized efficiently.

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