Method for producing silica-supported catalyst, and method for producing unsaturated carboxylic acid or unsaturated nitrile

摘要

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.

主权项

1. 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.