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Method and system for extraction of oil from corn

  • US 7,767,836 B2
  • Filed: 10/12/2006
  • Issued: 08/03/2010
  • Est. Priority Date: 05/18/1999
  • Status: Active Grant
First Claim
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1. A process of extracting oil from raw corn, including the steps of:

  • providing a reagent solution including ethanol having a concentration between 90-100%;

    mixing said reagent solution with the raw corn at a temperature between 50°

    C. and 90°

    C. to form an extraction solution comprising ethanol and compounds from the raw corn, said compounds including extracted oil, extracted protein mixture and corn solids;

    separating said extraction solution into corn solids and a filtrate, said filtrate comprising extracted oil and extracted protein compound mixture;

    membrane filtering the filtrate to pass an ethanol mixture through the membrane, said ethanol mixture containing ethanol and extracted oil to thereby separate a substantial amount of said extracted protein compound mixture;

    membrane filtering the ethanol mixture to restrain a substantial amount of said extracted oil for oil collection.

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