Purification of biologically-produced 1,3-propanediol

  • US 20050069997A1
  • Filed: 05/05/2004
  • Published: 03/31/2005
  • Est. Priority Date: 05/06/2003
  • Status: Active Grant
First Claim
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1. A process of purifying biologically-produced 1,3-propanediol from the fermentation broth of an organism able to produce 1,3-propanediol, comprising the steps of:

  • (a) subjecting the fermentation broth to filtration;

    (b) subjecting the product of step a to ion exchange purification wherein anionic and cationic molecules are removed; and

    (c) subjecting the product of step b to a distillation procedure comprising at least two distillation columns wherein one of said distillation columns removes molecules having a boiling point exceeding the boiling point of 1,3-propanediol and the other of said distillation columns removes molecules having a boiling point below the boiling point of 1,3-propanediol.

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