Patent ID: 9533930
Date: 2017-01-03
CPC Classifications: B01D,C07B,C07C

Claim:
1. A process for producing a biobased propylene glycol product by reacting an aqueous solution of glycerol with hydrogen to produce a crude product mixture including water, lower molecular weight alcohols, higher diols, unconverted glycerol and one or both of propylene oxide and glycidol, then removing water, lower molecular weight alcohols, higher diols and unconverted glycerol from the crude product mixture to produce a finished propylene glycol product having an APHA of 10 or less, characterized in that a further purification is undertaken to reduce the concentration of at least one of propylene oxide and glycidol in the finished propylene glycol product having an APHA of 10 or less and a purity of at least 95% by contacting the same with a strong acid ion exchange resin.