Process for liquid phase hydrogenation
AssigneeSynfuels International, Inc.
InventorsMarvin M. Johnson, Edward R. Peterson, Sean C. Gattis
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Abstract
A process and catalyst for the liquid phase selective hydrogenation of alkynes to alkenes with high selectivity to alkenes relative to alkanes, high alkyne conversion, and sustained catalytic activity comprising a reactant comprising an alkyne and a non-hydrocarbon solvent/absorbent, contacting the reactant stream with a hydrogen-containing stream in the presence of a supported, promoted, Group VIII catalyst, removing the solvent/absorbent, and recovering the alkene product.
Claims20
A process for selective hydrogenation, comprising:
- preparing a reactant stream comprising an alkyne absorbed in a liquid absorbent;
- contacting the reactant stream with a selective hydrogenation catalyst in the presence of a gas stream comprising hydrogen and greater than 2000 ppm carbon monoxide, at hydrogenation conditions to provide a product stream;
- wherein the catalyst comprises a Group VIII metal;
- separating the absorbent from the product stream to recover a product.
A process for liquid phase selective hydrogenation, comprising:
- contacting an alkyne absorbed in a liquid absorbent with a catalyst in the presence of carbon monoxide at greater than 2000 ppm and hydrogen, at conditions conducive to selective hydrogenation, to produce a product stream comprising a product alkene;
- wherein the selective hydrogenation catalyst comprises a supported Group VIII metal;
- separating the liquid absorbent from the product stream to substantially recover the product alkene.
A selective hydrogenation process, comprising:
- absorbing one or more acetylenic compounds in a liquid polar non-hydrocarbon absorbent to provide a reactant stream;
- providing a hydrogenation catalyst comprising a Group VIII metal and a promoter;
- contacting the reactant stream with the hydrogenation catalyst, in the presence of a gas stream comprising hydrogen and greater than 2000 ppm carbon monoxide, under selective hydrogenation conditions, to provide a product stream;
- wherein the product stream comprises the ethylenic compounds corresponding to the one or more acetylenic compounds in the reactant stream;
- separating the absorbent from the product stream.
Dependencies are inferred from the claim text.