| abstract |
An oxide catalyst is disclosed which contains an oxide represented by the formula:n n n [Formula I]n n n n n n n n Wherein X is at least one element selected from the group consisting of Te and Sb; Y is at least one element selected from the group consisting of Al and W; Z is an oxide having an rutile structure At least one element selected from the group consisting of elements, wherein a Z element oxide having a rutile structure is used as a source of Z for catalyst production; Q is titanium, tin, germanium, lead, tantalum, ruthenium, rhenium, rhodium, iridium , At least one element selected from the group consisting of platinum, chromium, manganese, technetium, osmium, iron, arsenic, cerium, cobalt, magnesium, nickel and zinc, and a Q element compound having no rutile structure is a Q source for preparing a catalyst. A, b, c, d, e, f and n are the atomic fractions of V, Nb, X, Y, Z, Q and O for Mo, respectively).n n n Also disclosed is a process for producing unsaturated carboxylic acids or unsaturated rutiles using the above-mentioned oxide catalysts. |