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A process for preparing a metal oxide catalyst for acrylic acid production which comprises calcining a metal compound mixture at 400° C. or higher to prepare a metal oxide powder comprising Mo, V, Sb, and at least one element selected from the group consisting of Nb and Ta, and supporting a compound

A process for preparing a metal oxide catalyst for acrylic acid production which comprises calcining a metal compound mixture at 400° C. or higher to prepare a metal oxide powder comprising Mo, V, Sb, and at least one element selected from the group consisting of Nb and Ta, and supporting a compound comprising at least one element selected from the group consisting of Sb, Tl, Se, As, Pb, Sn, Ag, Cu, Ru, and Rh on the metal oxide powder, and a process for producing acrylic acid by gas phase oxidation of propane using the catalyst.

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1. A process for producing acrylic acid comprising catalytically oxidizing propane in a gas phase in the presence of a metal oxide catalyst prepared by a process which comprises calcining a metal compound mixture at 400° C. to 700° C. to prepare a metal oxide powder comprising Mo, V, Sb, and at leas

1. A process for producing acrylic acid comprising catalytically oxidizing propane in a gas phase in the presence of a metal oxide catalyst prepared by a process which comprises calcining a metal compound mixture at 400° C. to 700° C. to prepare a metal oxide powder comprising Mo, V, Sb, and at least one element selected from the group consisting of Nb and Ta, and supporting a compound comprising at least one element selected from the group consisting of Sb, Tl, Se, As, Pb, Sn, Ag, Cu, Ru, and Rh on the metal oxide powder. 2. A process for producing acrylic acid comprising catalytically oxidizing propane in a gas phase in the presence of a metal oxide catalyst prepared by a process which comprises calcining a metal compound mixture at 400° C. to 700° C. to prepare a metal oxide powder comprising Mo, V, Sb, and at least one element selected from the group consisting of Nb and Ta, and at least one element selected from the group consisting of Ag, Zn, Sn, Pb, As, Cu, Tl, and Se, and supporting a compound comprising at least one element selected from the group consisting of Sb, Tl, Se, As, Pb, Sn, Ag, Cu, Ru, Rh, Na and K on the metal oxide powder.