Methods of using hydrogen to extend catalyst life for ethanol to butadiene conversions
AssigneesBattelle Memorial Institute, Bridgestone Americas Tire Operations, LLC
InventorsVanessa Dagle, Robert A. Dagle, Terrence E. Hogan
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Abstract
Disclosed herein is a method for converting ethanol to 1,3-butadiene, wherein the method utilizes H2 produced during a first step of the method for subsequent conversions involved in the method. In particular aspects, H2 produced from converting ethanol to acetaldehyde is used to promote the conversion of the acetaldehyde to 1,3-butadiene. The H2 promotes enhanced catalyst stability, as well as enhanced selectivity and yields of the 1,3-butadiene product. In particular aspects, the method comprises two steps to produce the 1,3-butadiene from the ethanol and H2 produced from a first step facilitates enhanced selectivities and yields for the second step.
Claims20
A method for producing 1,3-butadiene from ethanol, the method comprising:
- exposing an ethanol-containing feedstock to a first catalyst system to produce a reaction product comprising acetaldehyde and H2;
- and
- exposing the acetaldehyde of the reaction product to a second catalyst system to produce a 1,3-butadiene-containing composition, wherein exposing the acetaldehyde to the second catalyst system is done in the presence of at least a portion of the H2 from the reaction product.
A method, comprising:
- exposing an ethanol-containing feedstock to a first catalyst system in a first reactor to produce a reaction product comprising acetaldehyde and H2;
- passing the acetaldehyde of the reaction product to a second reactor;
- passing at least a portion of H2 of the reaction product to the second reactor;
- and
- exposing the acetaldehyde of the reaction product to a second catalyst system in the second reactor to produce a 1,3-butadiene-containing composition, wherein exposing the acetaldehyde to the second catalyst is done in the presence of the H2 from the reaction product.
Dependencies are inferred from the claim text.