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US 9,410,099 B2Granted
Process for making isooctenes from aqueous isobutanol
AssigneeButamax Advanced Biofuels LLC
InventorsMichael B. D'Amore, Leo Ernest Manzer, Edward S. Miller, Jr., Jeffrey P. Knapp
Life of this patent
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Abstract
The present invention relates to a catalytic process for making isooctenes using a reactant comprising isobutanol and water. The isooctenes so produced are useful for the production of fuel additives.
Claims25
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.
8 more elements
A process for production of a recovered butene 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 reaction product that comprises at least one butene;
- and
- (e) recovering the at least one butene from the reaction product to produce a recovered butene,
- 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.
10 more elements
Dependencies are inferred from the claim text.