Patent ID: 8664448
Filing Date: 2014-03-04
Classification: C07C

Abstract:
1. A process for producing an industrial grade propylene glycol comprising: (i) providing a hydrogenation reactor effluent comprising propylene glycol and glycerol to a reactor and hydrogenating the hydrogenation reactor effluent at a temperature within a range of about 120° C. to about 150° C. and a pressure within a range of about 100 bar to about 170 bar in the presence of a hydrogenation catalyst to form a hydrogenated product; (ii) distilling the hydrogenated product using a distillation apparatus to form a glycol product; and (iii) contacting the glycol product with a treatment bed to form the industrial grade propylene glycol wherein the industrial grade propylene glycol is odorless, colorless and contains less than 2000 ppm of ethylene glycol.