Catalyst for producing dimethyl ether, method for producing catalyst and method for producing dimethyl ether
AssigneeJfe Holdings, Inc.
InventorsTsutomu Shikada, Yotaro Ohno, Takashi Ogawa, Masatsugu Mizuguchi, Masami Ono, Kaoru Fujimoto
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Abstract
A catalyst for producing dimethyl ether which comprises alumina particles having an average size of 200 μm or less and a methanol synthesis catalyst layer formed around the alumina particles. The methanol synthesis catalyst is in an amount of 0.05 to 5 parts by weight to 1 part by weight of the alumina particles. Dimethyl ether is produced by the method of forming a slurry by introducing the catalyst into a solvent and introducing a mixed gas comprising carbon monoxide and hydrogen into the slurry.
Claims43
A catalyst for producing dimethyl ether, the catalyst being produced by a method comprising forming a layer comprising a methanol synthesis catalyst which comprises copper oxide, zinc oxide and alumina, around alumina particles, the alumina particles having an average size of 200 μm or less, wherein the methanol synthesis catalyst layer formed around said alumina particles is in an amount of 0.05 to 5 parts by weight to 1 part by weight of the alumina, wherein the layer is produced by a method comprising:
- (a) forming a slurry by introducing the alumina particles into an aqueous solution containing a metallic salt of one or more active elements of the methanol synthesis catalyst;
- (b) heating the slurry at a temperature of 50 to 90° C. to provide a heated slurry;
- (c) neutralizing the heated slurry with a base solution, whereby the one or more active elements of the methanol synthesis catalyst form deposits on the alumina particles;
- (d) allowing the slurry to stand for a sufficient time or subjection the slurry to a mild agitation for aging to sufficiently develop the deposits;
- and
- (e) washing the layer with an acidic aqueous solution.
A catalyst for producing dimethyl ether, the catalyst being produced by a method comprising forming a layer comprising a methanol synthesis catalyst which comprises chromium oxide, zinc oxide and alumina, around alumina particles, the alumina particles having an average size of 200 μm or less, wherein the methanol synthesis catalyst layer formed around said alumina particles is in an amount of 0.05 to 5 parts by weight to 1 part by weight of the alumina, wherein the layer is produced by a method comprising:
- (a) forming a slurry by introducing the alumina particles into an aqueous solution containing a metallic salt of one or more active elements of the methanol synthesis catalyst;
- (b) heating the slurry at a temperature of 50 to 90° C. to provide a heated slurry;
- (c) neutralizing the heated slurry with a base solution, whereby the one or more active elements of the methanol synthesis catalyst form deposits on the alumina particles;
- (d) allowing the slurry to stand for a sufficient time or subjecting the slurry to a mild agitation for aging to sufficiently develop the deposits;
- and
- (e) washing the layer with an acidic aqueous solution.
A catalyst for producing dimethyl ether, the catalyst being produced by a method comprising forming a layer comprising a methanol synthesis catalyst which comprises chromium oxide, copper oxide, zinc oxide and alumina, around alumina particles, the alumina particles having an average size of 200μ or less, wherein the methanol synthesis catalyst layer formed around said alumina particles is in an amount of 0.05 to parts by weight to 1 part by weight of the alumina, wherein the layer is produced by a method comprising:
- (a) forming a slurry by introducing the alumina particles into an aqueous solution containing a metallic salt of one of more active elements of the methanol synthesis catalyst;
- (b) heating the slurry at a temperature of 50 to 90° C. to provide a heated slurry;
- (c) neutralizing the heated slurry with a base solution, whereby the one or more active elements of the methanol synthesis catalyst form deposits on the alumina particles;
- (d) allowing the slurry to stand for a sufficient time or subjecting the slurry to a mild agitation for aging to sufficiently develop the deposits;
- and
- (e) washing the layer with an acidic aqueous solution.
A method for producing a catalyst comprising
- forming a layer comprising a methanol synthesis catalyst which comprises copper oxide, zinc oxide and alumina, around alumina particles, the alumina particles having an average size of 200 μm or less, wherein the methanol synthesis catalyst layer formed around said alumina particles is in an amount of 0.05 to 5 parts by weight to 1 part by weight of the alumina,
- wherein the layer is produced by a method comprising:
- (a) forming a slurry by introducing the alumina particles into an aqueous solution containing a metallic salt of one or more active elements of the methanol synthesis catalyst;
- (b) heating the slurry at a temperature of 50 to 90° C. to provide a heated slurry;
- (c) neutralizing the heated slurry with a base solution, whereby the one or more active elements of the methanol synthesis catalyst from deposits on the alumina particles;
- (d) allowing the slurry to stand for a sufficient time of subjecting the slurry to mild agitation for aging to sufficiently develop the deposits;
- and
- (e) washing the layer with an acidic aqueous solution.
Dependencies are inferred from the claim text.