초록 ▼

A process for producing acrylic acid from propane and oxygen gas through a vapor-phase catalytic oxidation reaction, said process comprising conducting the reaction using as a catalyst a metal oxide containing metallic elements Mo, V, Sb, and A (provided that A is at least one element selected from

A process for producing acrylic acid from propane and oxygen gas through a vapor-phase catalytic oxidation reaction, said process comprising conducting the reaction using as a catalyst a metal oxide containing metallic elements Mo, V, Sb, and A (provided that A is at least one element selected from the group consisting of Nb, Ta, Sn, W, Ti, Ni, Fe, Cr, and Co). The metal oxide is prepared by a process including specific steps (1) and (2). The metal oxide may be supported on a compound containing specific elements.

대표청구항 ▼

[ What is claimed is:] [1.] A process for producing a catalyst which is for use in producing acrylic acid by the gas-phase catalytic oxidation of propane and comprises a metal oxide containing metallic elements Mo, V, Sb, and A (provided that A is at least one element selected from the group consist

[ What is claimed is:] [1.] A process for producing a catalyst which is for use in producing acrylic acid by the gas-phase catalytic oxidation of propane and comprises a metal oxide containing metallic elements Mo, V, Sb, and A (provided that A is at least one element selected from the group consisting of Nb, Ta, Sn, W, Ti, Ni, Fe, Cr, and Co), said process comprising the following steps (1) and (2):step (1): reacting V.sup.+5 with Sb.sup.+3 in an aqueous medium at a temperature not lower than 70.degree. C. in the presence of Mo.sup.+6 and, during or after the reaction, bubbling either molecular oxygen or a gas containing molecular oxygen into the reaction mixture; andstep (2): adding a compound containing the element A as a component thereof to the reaction product obtained in step (1) above, mixing the ingredients to obtain a homogeneous mixture, and calcining the resultant mixture.