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Process for making isooctenes from aqueous isobutanol

  • US 9,410,099 B2
  • Filed: 06/24/2015
  • Issued: 08/09/2016
  • Est. Priority Date: 06/16/2006
  • Status: Active Grant
First Claim
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1. A process for production of a recovered isooctene from renewable sources comprising:

  • (a) providing a feedstock derived from a renewable source to a recombinantly engineered microorganism;

    (b) fermenting the feedstock with the recombinantly engineered microorganism, thereby forming isobutanol;

    (c) recovering at least a portion of the isobutanol;

    (d) contacting at least a portion of the recovered isobutanol with an acid catalyst in the presence of water to produce a first reaction product that comprises at least one isooctene,wherein the recombinantly engineered microorganism is engineered to express a biosynthetic pathway comprising substrate to product conversions that include;

    pyruvate to acetolactate;

    acetolactate to 2,3-dihydroxyisovalerate;

    2,3-dihydroxyisovalerate to α

    -ketoisovalerate;

    α

    -ketoisovalerate to isobutyraldehyde; and

    isobutyraldehyde to the isobutanol.

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