Patent ID: 7586016
Filing Date: 2009-09-08
Classification: B01J,C07C

Abstract:
1. A method for producing 1,2-propylene glycol from bio-based glycerol, characterized in that, in the method, a CuO—CeO 2 —SiO 2 catalyst is filled into a fixed bed reactor, a glycerol solution is flowed into the reactor together with hydrogen gas in a manner of top feeding, and the reaction temperature is controlled to be 170˜200° C. and the reaction pressure is controlled to be 1.0˜5.0 MPa, thereby the production of 1,2-propylene glycol from the hydrogenation of glycerol is achieved; in the CuO—CeO 2 —SiO 2 catalyst, the mass percent content of CuO is 30˜70 wt % and the mass percent content of CeO 2 is 3˜15 wt %; the solvent in the glycerol solution is selected from a group consisting of methanol, water, or the mixture of methanol and water.