Procédé de réduction de produits à fonction carbonyle en produits à fonction alcoolique

摘要

Carbonyl compounds are reduced to the corresponding alcohols by catalytic reduction in the presence of a non-soluble anion-exchange resin. The "carbonyl compounds" referred to are aldehydes, ketones, hydroxyaldehydes and hydroxyketones. The catalyst may be nickel carbonate reduced by hydrogen or nickel produced by the decomposition of nickel carbonyl or cobalt. The process is carried out at a pressure of from 14 to 2133 lb./sq. inch and a temperature from 1 DEG to 150 DEG C. In the examples: (a) an aqueous solution of glucose is hydrogenated in the presence of Raney nickel and an anion-exchange resin to give sorbitol with a small amount of gluconic acid; (b) an aqueous solution of invert sugar is hydrogenated in the presence of palladium and an anion exchange resin to give mannitol; and (c) an aqueous solution of aldol and methanol is hydrogenated in the presence of platinum oxide and zeolite to give butanediol 1.3.