Method for carbonylation of lower alkyl alcohols using tungsten promoted group VIII catalyst
AssigneeEastman Chemical Company
InventorsJoseph Robert Zoeller, Andy Hugh Singleton, Gerald Charles Tustin, Donald Lee Carver
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Abstract
A vapor-phase carbonylation method for producing esters and carboxylic acids from reactants comprising lower alkyl alcohols, lower alkyl alcohol generating compounds, and mixtures thereof. The method includes contacting the reactants and carbon monoxide in a carbonylation zone of a carbonylation reactor under vapor-phase carbonylation conditions with a catalyst having a catalytically effective amount of a Group VIII metal selected from platinum or palladium, and tungsten which are associated with a solid catalyst support material.
Claims18
A vapor-phase carbonylation method for producing esters and carboxylic acids from reactants selected from the group consisting of lower alkyl alcohols having from 1 to 10 carbon atoms, alkane polyols having 2 to 6 carbon atoms, alkyl alkylene polyethers having 3 to 20 carbon atoms and alkoxyalkanols having from 3 to 10 carbon atoms and mixtures thereof, said method comprising contacting the reactants and carbon monoxide with a catalyst in a carbonylation zone of a carbonylation reactor under vapor-phase conditions and wherein said catalyst consisting essentially of a catalytically effective amount of a Group VIII metal selected from the group consisting of platinum and palladium, and tungsten and wherein said metals are associated with a solid catalyst support material selected from the group consisting of carbon, pumice, magnesia, diatomaceous earth, bauxite, titania, zirconia, clays, magnesium silicate, silicon carbide, zeolites, and ceramics.
A vapor-phase carbonylation method for producing acetic acid, methyl acetate or a mixture thereof comprising the steps of:
- a. under vapor-phase carbonylation conditions of temperature and pressure, contacting a gaseous mixture comprising methanol, carbon monoxide, and a halide promoter selected from the group consisting of iodine, hydrogen iodide, methyl iodide, ethyl iodide, 1-iodopropane, 2-iodobutane, 1-iodobutane, bromine, hydrogen bromide, methyl bromide, ethyl bromide, benzyl iodide and mixtures thereof with a solid catalyst in a carbonylation zone of a carbonylation reactor wherein said solid catalyst comprises from about 0.01 to about 10 weight % of a Group VIII metal selected from the group consisting of platinum and palladium, and tungsten associated with a solid carrier material selected from activated carbon and wherein the weight percents of the metals are based on the total weight of the catalyst;
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- b. recovering acetic acid, methyl acetate or a mixture thereof from the gaseous product.
A vapor-phase carbonylation method for producing acetic acid, methyl acetate or a mixture thereof comprising the steps of:
- a. under vapor-phase carbonylation conditions of temperature and pressure, contacting a gaseous mixture comprising methanol, carbon monoxide, and a halide promoter selected from the group consisting of iodine, hydrogen iodide, methyl iodide, bromine, hydrogen bromide, methyl bromide and mixtures thereof with a solid catalyst in a carbonylation zone of a carbonylation reactor wherein said solid catalyst comprises from about from about 0.1 weight % to about 2 weight % of a Group VIII metal selected from the group consisting of platinum and palladium, and from about 0.1 weight % to about 5 weight % tungsten associated with a solid carrier material selected from carbon and wherein the weight % of the weight percents of the metals are based on the total weight of the catalyst;
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- b. recovering acetic acid, methyl acetate or a mixture thereof from the gaseous product.
Dependencies are inferred from the claim text.