| abstract |
The invention relates to a novel multimetal oxide of general formula Aga-cQbMcV12Od * e H2O (I), wherein a is a value ranging from 3 to 10, Q is an element selected from P, As, Sb and/or Bi, b is a value from 0.2 to 3, M is a metal, c is a value from 0 to 3, provided that (a-c)> 0,1, d is a number determined according to the valence and frequency of different oxygen elements in the formula (I) and e is a value ranging from 0 to 20, wherein said oxide is embodied in the form of a crystalline structure whose powder X-ray diffractogram is characterised in that the diffraction reflex thereof for selected lattice differences is at least equal to 5 for d=7.13; 5.52; 5.14; 3.57; 3.25; 2.83; 2.79; 2.73; 2.23 and 1.71Å (± 0,04Å). The inventive multimetal oxides are used for producing precatalysts and catalysts for a gas phase partial oxidation of aromatic hydrocarbons and are transformable by heat-treating into silver-vanadium oxide bronzes which are catalytically active components of catalysts. |