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Methods and apparatus for producing alkyl esters from lipid feed stocks and systems including same

  • US 8,686,171 B2
  • Filed: 01/10/2011
  • Issued: 04/01/2014
  • Est. Priority Date: 08/04/2006
  • Status: Active Grant
First Claim
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1. A process for producing alkyl esters comprising:

  • mixing a lipid feed stock with an alcohol to form a reaction mixture, the alcohol comprising a C1-C6 alcohol;

    contacting the reaction mixture with a catalyst under supercritical conditions for the alcohol, the catalyst comprising an unmodified metal oxide, andremoving residual free fatty acids from the reaction mixture, wherein removing residual free fatty acids from the reaction mixture comprises adding dimethyl carbonate to the reaction mixture.

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