Catalyst formulation for hydrogenation
AssigneeSynfuels International, Inc.
InventorsMarvin M. Johnson, Edward R. Peterson, Sean C. Gattis
Life of this patent
Estimating the term…
Abstract
A composition and method for preparation of a 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 Group VIII metal and a Group IB, Group IIB, Group IIIA, and/or Group VIIB promoter on a particulate support.
Claims72
A selective hydrogenation catalyst consisting essentially of:
- a precursor comprising at least one Group VIII metal disposed on an inorganic support;
- and
- a second metal selected from the group consisting of zinc, Group IIIA metals, Mn, and combinations thereof, disposed on the precursor;
- wherein the catalyst comprises between 0.01 and 10 weight % Group VIII metal, and is capable of selectively hydrogenating acetylene with a conversion Sc of at least about 95% and a selectivity to ethylene relative to ethane Ss of at least about 25 when the catalyst is employed in a steady-state liquid phase hydrogenation process.
A composition consisting essentially of:
- a support;
- a Group VIII metal disposed on the support;
- and
- a second metal selected from the group consisting of Group IIIA metals, zinc, Mn, and combinations thereof, disposed on the Group VIII metal and disposed on the support;
- wherein the concentration of said Group VIII metal is within the range of from about 0.01 wt-% to about 10 wt-%, and wherein said composition is characterized by sustained activity for selective hydrogenation of at least about 150 hours.
A catalyst active for liquid-phase selective hydrogenation consisting essentially of:
- Pd supported on particulate alumina;
- and
- a subsequently supported second metal comprising Mn, and one selected from the group consisting of Ga, In, Zn, and combinations thereof;
- the catalyst having:
- a once-through acetylene conversion Sc of at least about 95%;
- and
- a selectivity for ethylene relative to ethane Ss of at least about 40, and a concentration of palladium within the range of from about 0.01 wt-% to about 10 wt-%.
A supported catalyst for selective hydrogenation consisting essentially of:
- a support coated with a Group VIII metal and a second metal selected from the group consisting of gold, silver, zinc, Group IIIA metals, Mn, and combinations thereof disposed on the support, wherein the concentration of the Group VIII metal is within the range of from about 0.01 wt-% to about 10 wt-%;
- and
- having a single-pass conversion Sc of at least 90% in liquid-phase hydrogenation of acetylene.
A supported catalyst for selective hydrogenation consisting essentially of:
- a first metal selected from the group consisting of Group VIII metals and combinations thereof, disposed on the support;
- and
- a second metal selected from the group consisting of Group IIIA metals, zinc, Mn, and combinations thereof;
- said first and second metals being disposed on the support, wherein the concentration of first metal is within the range of from about 0.01 wt-% to about 10 wt-% and wherein the supported catalyst has an ethylene selectivity relative to ethane Ss of at least 20 in liquid-phase hydrogenation of acetylene.
A hydrogenation catalyst made by a process comprising:
- applying a first metal to a support;
- applying a second metal to the support;
- drying the first and second metal-coated support;
- calcining the dried first and second metal-coated support to provide a precursor;
- and
- reducing the precursor;
- wherein the first metal comprises a Group VIII metal and wherein the second metal is selected from the group consisting of Group IIIA metals, zinc, Mn, and combinations thereof;
- wherein the hydrogenation catalyst consists essentially of the support, 0.01%-10% by weight of the first metal to final weight of the catalyst and 0.05%-1.2% by weight of the second metal to final weight of the catalyst;
- and
- wherein said first and second metals are applied such that the catalyst is capable of a sustained activity for selective hydrogenation of at least 150 hours and a once-through conversion Sc of at least 95% in liquid-phase hydrogenation of acetylene.
Dependencies are inferred from the claim text.