Process for liquid phase hydrogenation
AssigneeSynfuels International, Inc.
InventorsMarvin M. Johnson, Edward R. Peterson, Sean C. Gattis
Life of this patent
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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.
Claims32
A selective liquid-phase hydrogenation catalyst consisting essentially of:
- a precursor comprising from about 0.01 weight percent to about 10 weight percent of a first metal disposed on an inorganic support comprising alumina, wherein the first metal is selected from the group consisting of Group VIII metals and combinations thereof;
- and
- from about 0.01 weight percent to about 10 weight percent of a second metal that is disposed on the precursor by impregnation from a solution comprising the second metal, wherein the second metal is selected from the group consisting of zinc, Group VIIB metals, and combinations thereof,
- wherein the catalyst has a particle size of less than or equal to about 0.4 mm, and a surface area in the range of from about 40 to about 70 m2/g.
A selective liquid-phase hydrogenation catalyst produced by impregnating a precursor with a promoter selected from the group consisting of Group IB metals, zinc, Group VIIB metals, and combinations thereof;
- wherein the precursor comprises from about 0.01 weight percent to about 10 weight percent of a first metal selected from the group consisting of Group VIII metals and combinations thereof disposed on an inorganic support comprising alumina, and
- wherein the catalyst comprises from about 0.01 weight percent to about 10 weight percent of the promoter disposed on the precursor, and wherein the catalyst has a particle size of less than or equal to about 0.4 mm, and a surface area in the range of from about 40 to about 70 m2/g.
A selective liquid-phase hydrogenation catalyst consisting essentially of:
- from about 0.01 weight percent to about 10 weight percent of a first metal selected from the group consisting of Group VIII metals and combinations thereof;
- and
- from about 0.01 weight percent to about 10 weight percent of a second metal selected from the group consisting of zinc, Group VIIB metals, and combinations thereof;
- wherein the catalyst has a minimum dimension in the range of from about 0.01 inch (254 μm) to about 0.0165 inch (419 μm), and a surface area in the range of from about 40 to about 70 m2/g;
- and
- wherein the catalyst is capable of selectively hydrogenating, under selective hydrogenation conditions, a reactant stream in the presence of a gas stream comprising hydrogen and carbon monoxide to produce a product stream comprising at least one alkene, wherein the reactant stream comprises at least one alkyne absorbed in a liquid absorbent and the gas stream comprises carbon monoxide in excess of 1% of the non-liquid absorbent components.
A selective liquid-phase hydrogenation catalyst consisting essentially of:
- a precursor comprising from about 0.01 weight percent to about 10 weight percent of a first metal disposed on an inorganic support, wherein the first metal is selected from the group consisting of Group VIII metals and combinations thereof;
- and
- from about 0.01 weight percent to about 10 weight percent of a second metal that is disposed on the precursor by impregnation from a solution comprising the second metal after the first metal is disposed on the support, wherein the second metal is selected from the group consisting of Group IIIA metals, Group VIIB metals and combinations thereof,
- wherein the weight ratio of the second metal to the first metal is in the range of from about 0.3 to about 1.3, and wherein the catalyst has a particle size of less than or equal to about 0.4 mm, and a surface area in the range of from about 40 to about 70 m2/g.
Dependencies are inferred from the claim text.