Iridium catalysts for carbonylation
AssigneeEastman Chemical Company
InventorsZhidong George Zhu, Gerald Charles Tustin, Joseph Robert Zoeller, Mary Kathleen Moore, David Alan Jenkins
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Abstract
A solid catalyst comprising an effective amount of iridium and at least one second metal selected from gallium, zinc, indium and germanium associated with a solid support material is useful for vapor phase carbonylation to produce carboxylic acids and esters from alkyl alcohols, esters, ethers or ester-alcohol mixtures. The iridium and at least one second metal are deposited on a support material. In some embodiments of the invention, the catalyst is useful for vapor phase carbonylation.
Claims44
A carbonylation catalyst comprising an effective amount of iridium and at least one second metal selected from gallium, zinc, indium and germanium wherein the iridium and the at least one second metal are associated with a solid support material.
A carbonylation catalyst comprising from about 0.01 weight percent to about 10 weight percent each of iridium and at least one second metal selected from gallium, zinc, indium and germanium wherein the iridium and at least one second metal are associated with a solid support material.
A method for producing at least one carboxylic acid, ester, or combination of carboxylic acid and ester mixtures from at least one reactant selected from alkyl alcohols, ethers, esters and combinations of two or more of the foregoing, the method comprising:
- a) contacting the at least one reactant with carbon monoxide in a reaction zone under vapor-phase carbonylation reaction conditions in the presence of a catalyst comprising an effective amount of iridium and at least one second metal selected from gallium, zinc, indium and germanium, wherein the iridium and the at least one second metal are associated with a solid support material;
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- b) recovering at least one carboxylic acid or ester from the reaction zone.
A method for producing at least one carboxylic acid, ester, or combination of carboxylic acid and ester mixtures from at least one selected from alkyl alcohols, ethers, esters and combinations of two or more of the foregoing, the method comprising:
- a) contacting the at least one reactant with carbon monoxide in a reaction zone under vapor-phase carbonylation reaction conditions in the presence of a catalyst comprising from about 0.01 weight percent to about 10 weight percent each of iridium and at least one second metal selected from gallium, zinc, indium and germanium, wherein the iridium and at least one second metal are associated with a solid support material;
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- b) recovering at least one carboxylic acid or ester from the reaction zone.
A method for preparing a solid supported catalyst composition useful for vapor phase carbonylation, the method comprising:
- a) providing a solid support material selected from carbon, activated carbon, pumice, alumina, silica, silica-alumina, magnesia, diatomaceous earth, bauxite, titania, zirconia, clays, magnesium silicate, silicon carbide, zeolites, ceramics and combinations of two or more of the foregoing;
- b) contacting the support material with a solution containing iridium and at least one second metal selected from gallium, zinc, indium and germanium wherein the iridium and the at least one second metal are associated with the solid support material;
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- c) drying the solid support material wherein from about 0.01 weight percent to about 10 weight percent of the iridium and at least one second metal are associated with the solid catalyst support material, wherein weight percent of each metal is determined as the weight of atoms of that particular metal based on the total weight of the solid supported catalytic material.
Dependencies are inferred from the claim text.