Method for producing silica-supported catalyst, and method for producing unsaturated carboxylic acid or unsaturated nitrile
AssigneeAsahi Kasei Chemicals Corporation
InventorsYusuke Ishii, Takaaki Kato
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Abstract
A method for producing a silica-supported catalyst comprising Mo, V. Nb, and a component X (Sb and/or Te) to be used in a vapor phase catalytic oxidation or ammoxidation of proprane, comprising the steps of: (I) preparing a raw material mixture solution by mixing Mo, V, Nb, component X, a silica sol, and water; (II) obtaining a dry powder by drying the raw material mixture solution; and (III) obtaining a silica-supported catalyst by calcining the dry powder, wherein the silica sol contains 10 to 270 wt ppm of nitrate ions based on SiO2.
Claims7
A method for performing a vapor phase catalytic oxidation of propane to produce a corresponding unsaturated carboxylic acid, comprising the step of:
- introducing propane into a reaction vessel containing a silica-supported catalyst represented by the following general composition formula (1),
- Mo1VaXbNbcZdOn (1)
- (wherein X represents Sb and/or Te, Z represents at least one element selected from the group consisting of W, Ta, Ti, Mn, B, Bi, Y, and rare earth elements, a, b, c, d, and n represent an atomic ratio of the individual element to the element Mo, a, b, c, and d are 0.1≦a≦1, 0.01≦b≦1, 0.01≦c≦0.6, and 0≦d≦1, respectively, and n represents a number determined based on an oxidation state of component metals) produced by the method comprising the steps of:
- (I) preparing a raw material mixture solution by mixing Mo, V, Nb, component X, a silica sol, and water;
- (II) obtaining a dry powder by drying the raw material mixture solution;
- and
- (III) obtaining a silica supported catalyst by calcining the dry powder, wherein the silica sol contains 10 to 270 wt ppm of nitrate ions based on SO2.
A method for performing a vapor phase catalytic ammoxidation of propane to produce a corresponding unsaturated nitrile, comprising the step of:
- introducing propane and ammonia into a reaction vessel containing a silica-supported catalyst represented by the following general composition formula (1),
- Mo1VaXbNbcZdOn (1)
- (wherein X represents Sb and/or Te, Z represents at least one element selected from the group consisting of W, Ta, Ti, Mn, B, Bi, Y, and rare earth elements, a, b, c, d, and n represent an atomic ratio of the individual element to the element Mo, a, b, c, and d are 0.1≦a≦1, 0.01≦b≦1, 0.01≦c≦0.6, and 0≦d≦1, respectively, and n represents a number determined based on an oxidation state of component metals) produced by the method comprising the steps of:
- (I) preparing a raw material mixture solution by mixing Mo, V, Nb, component X, a silica sol, and water;
- (II) obtaining a dry powder by drying the raw material mixture solution;
- and
- (III) obtaining a silica-supported catalyst by calcining the dry powder, wherein the silica sol contains 10 to 270 wt ppm of nitrate ions based on SiO2.
Dependencies are inferred from the claim text.