초록 ▼

A metal oxide catalyst which can produce acrylic acid by a vapor phase catalytic oxidation of propane in high yield and has excellent abrasion resistance is disclosed. The metal oxide catalyst comprises Mo, V, Sb, A (A represents Nb or Ta) and optionally other metals, and is prepared through the fol

A metal oxide catalyst which can produce acrylic acid by a vapor phase catalytic oxidation of propane in high yield and has excellent abrasion resistance is disclosed. The metal oxide catalyst comprises Mo, V, Sb, A (A represents Nb or Ta) and optionally other metals, and is prepared through the following steps (1) and (2):

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for preparing a metal oxide catalyst comprising Mo, V, Sb and A (A represents Nb or Ta), for use in the production of acrylic acid by a vapor phase catalytic reaction of propane, said method comprising the following steps (1) and (2):(1) a step of reacting V.su

[ What is claimed is:] [1.]1. A method for preparing a metal oxide catalyst comprising Mo, V, Sb and A (A represents Nb or Ta), for use in the production of acrylic acid by a vapor phase catalytic reaction of propane, said method comprising the following steps (1) and (2):(1) a step of reacting V.sup.+5 and Sb.sup.+3 at a temperature of 70.degree. C. or higher in the presence of Mo.sup.+6 in an aqueous medium, and bubbling an oxygen-containing gas into the reaction mixture during or after the reaction; and(2) a step of adding to the reaction product obtained in step (1) a solution containing a compound comprising A and an aqueous solution of nitric acid or ammonium nitrate, uniformly stirring these components, and then calcining the resulting mixture.