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PROCESSES FOR ISOLATING OR PURIFYING PROPYLENE GLYCOL, ETHYLENE GLYCOL AND PRODUCTS PRODUCED THEREFROM

  • US 20080275277A1
  • Filed: 10/29/2007
  • Published: 11/06/2008
  • Est. Priority Date: 10/27/2006
  • Status: Active Grant
First Claim
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1. A process for isolating or purifying bio-based propylene glycol, bio-based ethylene glycol or a combination thereof, the process comprising:

  • placing the bio-based propylene glycol, the bio-based ethylene glycol or the combination thereof, and a polar solvent in an apparatus;

    distilling the bio-based propylene glycol, the bio-based ethylene glycol or the combination thereof, and the polar solvent in the apparatus; and

    collecting the bio-based propylene glycol, the bio-based ethylene glycol or the combination thereof.

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