PRODUCTION OF 1,3-BUTYLENE GLYCOL

摘要

PURPOSE:A feedstock containing paraaldol as a substantially major component is subjected to catalytic hydrogenation to produce the titled compound which is used as a starting material for a variety of synthetic resins and surface active agents or as a material for antifreezing solution, in high yield without formation of by-products. CONSTITUTION:A mixture containing paraaldol as a substantially active ingredient or its single product is used as a feedstock to effect catalytic hydrogenation in the presence of a catalyst such as Raney nickel or nickel on kieselguhr at 100-120 deg.C and 50-80kg/cm<2>. The catalyst is removed from the reaction mixture and the mixture is distilled under reduced pressure at a temperature lower than 150 deg.C to remove the low-boiling fraction whereby the objective compound is obtained. In purification, caution should be paid to the heating temperature and the residential time during the distillation, because the quality of the objective compound is sometimes influenced by them.