# US 8,772,195 B2 · Method for producing silica-supported catalyst, and method for producing unsaturated carboxylic acid or unsaturated nitrile

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- Number: US 8,772,195 B2
- Document ID: US8772195B2
- Status: Granted
- Kind: B2
- Application number: 13/146,983
- Filed: 2010-01-21
- Published: 2011-11-24
- Granted: 2014-07-08
- Earliest claimed: 2009-01-30
- Assignees: Asahi Kasei Chemicals Corporation
- Applicants: Yusuke Ishii; Takaaki Kato
- Inventors: Yusuke Ishii; Takaaki Kato
- Web page: https://patentgrep.com/patent/US8772195B2

## CPC

- C07C 51/16: by oxidation (C07C51/145 takes precedence)
- B01J 23/002: {Mixed oxides other than spinels, e.g. perovskite}
- B01J 23/28: Molybdenum
- B01J 23/30: Tungsten
- B01J 23/34: Manganese
- B01J 27/0576: {Tellurium; Compounds thereof}
- C07C 51/215: of saturated hydrocarbyl groups
- C07C 253/24: by ammoxidation of hydrocarbons or substituted hydrocarbons
- B01J 21/08: Silica
- B01J 37/0045: {Drying a slurry, e.g. spray drying}
- B01J 2523/00: Constitutive chemical elements of heterogeneous catalysts
- Y02P 20/52: using catalysts, e.g. selective catalysts
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

To produce a silica-supported catalyst having an excellent yield of a target product and excellent catalyst attrition resistance. 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 propane, 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.

## Claims

### Claim 1

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 propane, comprising the steps of:
(I) preparing a raw material mixture solution by mixing Mo, V, Nb, component X, a silica sol, and water;
(II) drying the raw material mixture solution to obtain a dry powder; and
(III) calcining the dry powder, wherein
the silica sol contains 10 to 270 wt ppm of nitrate ions based on SiO2, to obtain a silica-supported catalyst.

### Claim 2 (depends on 1)

The method for producing the silica-supported catalyst according to claim 1, wherein the silica-supported catalyst is 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).

### Claim 3 (depends on 1, 2)

The method for producing the silica-supported catalyst according to claim 1 or 2, wherein the component X is Sb.

### Claim 4 (depends on 2)

The method for producing the silica-supported catalyst according to claim 2, wherein the component Z is at least one element selected from the group consisting of W, Mn, and Ce.

### Claim 5 (depends on 1, 2)

The method for producing the silica-supported catalyst according to claim 1 or 2, wherein a silica content of the silica-supported catalyst is 35 to 70 mass % based on a total mass of the catalyst.

### Claim 6 (depends on 1, 2)

The method for producing the silica-supported catalyst according to claim 1 or 2, wherein the raw material mixture solution further comprises a silica powder.