Patent ID: 6737545
Filing Date: 2004-05-18
Classification: B01J,C01G,C01P,C07C

Abstract:
A multimetal oxide material of the formula I(A)p(B)qâ€ƒâ€ƒ(I), where:A is Mo12VaX1bX2cX3dX4eX5fX6gOx B is X7lSbhHiOy, X1 is W, Nb, Ta, Cr and/or Ce, x2 is Cu, Ni, Co, Fe, Mn and/or Zn, x3 is Sb and/or Bi, x4 is Li, Na, K, Rb, Cs and/or H, x5 is Mg, Ca, Sr and/or Ba, x6 is Si, Al, Ti and/or Zr, X7 is Cu, Zn, Co, Fe, Cd, Mn, Mg, Ca, Sr and/or Ba, a is from 1 to 8, b is from 0.2 to 5, c is from 0 to 23, d is from 0 to 50, e is from 0 to 2, f is from 0 to 5, g is from 0 to 50, h is from 0.1 to 50, i is from 0 to 50, x and y are each numbers which are determined by the valency and frequency of the elements in (I) other than oxygen and p and q are each numbers which differ from zero and the ratio p/q is from 20:1 to 1:80, which contains the moiety (A)p in the form of three-dimensional regions A of the chemical composition A: Mo12VaX1bX2cX3dX4eX5fX6gOx and the moiety (B)q in the form of three-dimensional regions B of the chemical composition B: X7lSbhHiOy where the regions A, B are distributed relative to one another as in a mixture of finely divided A and finely divided B, with the proviso that the multimetal oxide materials (I) are prepared using at least one separately preformed oxometallate B, X7lSbhHiOy, â€ƒwhich is obtained by preparing a dry blend from suitable sources of the elemental constituents of the oxometallate B which contain at least a part of the antimony in the oxidation state +5 and calcining said dry blend at from 200 to 1200Â° C.