Catalyst for the dehalogenation of alpha -halogenated carboxylic acids

摘要

The invention relates to a catalyst comprising a rare metal of Group VIII of the Periodic Table of Elements which has been deposited on an inert support and which has been used to dehalogenate alpha -halogenated carboxylic acids in the presence of hydrogen, and a rare metal of Group VIII of the Periodic Table of Elements which has been deposited on an inert support and which is such that the granulometry of b) is very much lower than that of a) to form a homogeneous mixture as a result of the action of currents of alpha -halogenated carboxylic acid and hydrogen. It is particularly useful for regenerating palladium catalysts used in the purification of crude monochloroacetic acid.