PROCESS FOR THE MANUFACTURE OF CHLORO- OR BROMOACETALDEHYDE DIALKYL ACETALS

摘要

A semi-continuous process for the manufacture of acetals of alpha-halogenated aldehydes is described. In a preferred embodiment of the invention, chloroacetaldehyde dimethyl acetal is prepared by introducing chlorine and a mixture of vinyl acetate and an excess of metethanol through separate inlets into a reaction site of a vertical packed column and collecting a low boiling distillate formed from by-product vapors and separately collecting the crude acetal product flowing downward from the reaction site.