Patent ID: 6428992
Filing Date: 2002-08-06
Classification: C12P

Abstract:
A process for the purification of 1,3-propanediol from a fermentation medium of a 1,3-propanediol-producing microorganism, the fermentation medium comprising the 1,3-propanediol-producing microorganism, 1,3-propanediol and fermentation coproducts consisting at least of glycerol, wherein:a) the 1,3-propanediol-producing microorganism is separated from the other components of the fermentation medium to give a clarified aqueous solution; b) said clarified aqueous solution is passed over a cation exchange resin to give at least one fraction comprising purified 1,3-propanediol and at least one fraction comprising the fermentation coproducts, the cation in the cation exchange resin being selected from the group consisting of lanthanum, lead, iron, zinc and aluminum; and c) the 1,3-propandiol is recovered.