Process for preparing a catalyst of manganese dioxide for hydration of cyanohydrin.

摘要

It SPREADS A PROCESS FOR PRODUCING A MANGANESE DIOXIDE denatured REACTION Hydrating CIANIHIDRINAS comprising reacting a salt of permanganate and a manganese (II) in an aqueous acid solution at a temperature of 60 MANGANESE DIOXIDE obtained by the process has a high activity for a long time in the preparation of an amide by hydration FOR cyanohydrin.