HYDROGENOLYSIS OF 5-CARBON SUGARS AND SUGAR ALCOHOLS

摘要

A method of making propylene glycol, comprising:
reacting a composition comprising lactate or lactic acid with hydrogen in the presence of a multi-metallic catalyst comprising rhenium;
wherein acid is added to the composition prior to the step of reacting;
wherein the lactate of lactic acid is converted with a yield of at least 60%; and
wherein the PG selectivity is at least 80%.