Metal-Loaded Zeolite Catalysts for the Halogen-Free Conversion of Dimethyl Ether to Methyl Acetate
AssigneeEnerkem, Inc.
InventorsAllen Artur Carl Reule, Natalia Semagina, Esteban Chornet
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Abstract
A catalyst for the carbonylation of dimethyl ether to methyl acetate. The catalyst comprises a zeolite, such as a mordenite zeolite, at least one Group IB metal, such as copper, and/or at least one Group VIII metal, such as iron, and at least one Group IIB metal, such as zinc. Such a catalyst with combined metals provides enhanced catalytic activity, improved stability, and improved selectivity to methyl acetate, and does not require a halogen promoter, as compared to a metal-free or copper only zeolite.
Claims83
A catalyst for the carbonylation of dimethyl either to produce methyl acetate, comprising:
- (i) a zeolite;
- (ii) at least one Group IIB metal;
- and (iii) at least one metal selected from the group consisting of Group IB metals and Group VIII metals.
A method of carbonylating dimethyl ether to produce methyl acetate, comprising:
- reacting dimethyl ether with carbon monoxide in the presence of a catalyst, said catalyst comprising:
- (i) a zeolite;
- (ii) at least one Group IIB metal;
- (iii) at least one metal selected from the group consisting of Group IB metals and Group VIII metals.
A method of treating a catalyst comprising:
- (i) a sodium form of a zeolite;
- (ii) at least one Group IIB metal;
- and (iii) at least one metal selected from the group consisting of Group IB metals and Group VIII metals, Comprising:
- a. contacting said catalyst with a first gas comprising oxygen and an inert gas;
- and
- b. contacting said catalyst with a second gas comprising hydrogen and an inert gas.
A method of treating a catalyst comprising:
- (i) an ammonium or acidic or protonated form of a zeolite;
- (ii) at least one Group IIB metal;
- and (iii) at least one metal selected from the group consisting of Group IB metals and Group VIII metals, consisting essentially of contacting said catalyst with a gas comprising oxygen and an inert gas.
Dependencies are inferred from the claim text.