Patent ID: 6794539
Filing Date: 2004-09-21
Classification: B01J,C07C

Abstract:
A process for preparing multimetal oxide compositions of the formula I[A]p[B]q[C]râ€ƒâ€ƒ(I), where A is a phase having the compositionMo12VaX1bX2cX3dX4eX5fX6gOx, B is a phase having the compositionX71CuhHiOy and C is a phase having the compositionX81SbjHkOz whereinX1: W, Nb, and/or Cr, X2: Cu, Ni, Co, and/or Fe, X3: Sb, X4: Na and/or K, X5: Ca, Sr, and/or Ba, X6: Si, Al, and/or Ti, X7: Mo and/or W, X8: Cu and/or Zn, a: 2 to 6, b: 0.5 to 2.5, c: 0 to 4, d: 0 to 3, e: 0 to 0.3, f: 0 to 2, g: 0 to 20, h: 0.5 to 2, i: 0 to 1, j: 0.2 to 20, k: 0 to 20, x,y,z: numbers selected so that each phase is electrically neutral, and p,q: positive numbers, r: 0 or a positive number, where the ratio p/(q+r)=20:1 to 1:20 and, when r is a positive number, the ratio q/r=20:1 to 1:20, said process comprisesi) preforming the phase B and optionally C in finely divided form, ii) preparing a plastically deformable precursor composition for the phase A, and iii) dispersing the preformed phase B and optionally C in the precursor composition for the phase A and drying and calcining the composition.