Renewable compositions

  • US 8,193,402 B2
  • Filed: 12/03/2008
  • Issued: 06/05/2012
  • Est. Priority Date: 12/03/2007
  • Status: Expired due to Fees
First Claim
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1. A process for preparing renewable hydrocarbons comprising:

  • (a) treating biomass to form a feedstock;

    (b) fermenting the feedstock with one or more species of microorganism, thereby forming one or more C2-C6 alcohols;

    (c) dehydrating at least a portion of the one or more C2-C6 alcohols obtained in step (b), thereby forming a product comprising one or more C2-C6 olefins;

    (d) isolating the one or more C2-C6 olefins;

    (e) oligomerizing at least a portion of the one or more C2-C6 olefins isolated in step (d), thereby forming a product comprising one or more C6-C24 unsaturated oligomers; and

    (f) hydrogenating at least a portion of the product of step (e) in the presence of hydrogen, thereby forming a product comprising one or more C6-C24 saturated alkanes;

    whereby the product of step (f) itself meets the requirements of at least one of ASTM D4814, ASTM D975, ASTM D910, or ASTM D1655, or a blend of at least 10% of the product of step (f) with a mixture of hydrocarbons meets the requirements of at least one of ASTM D4814, ASTM D975, ASTM D910 or ASTM D1655.

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