Patent ID: 7038082
Filing Date: 2006-05-02
Classification: B01J,C07C

Abstract:
1. A process for preparing a multimetal oxide material M of the stoichiometry I: wherein M M M a is from 0.01 to 1, b is from>0 to 1, c is from>0 to 1, d is from>0 to 0.5 and n is a number which is determined by the valency and frequency of the elements other than oxygen in (I), whose X-ray diffraction pattern has reflections h, i and k, whose peaks are at the diffraction angles (2θ) 22.2±0.5°(h), 27.3±0.5°(i) and 28.2±0.5°(k), and the process comprising washing the multimetal oxide material M with a liquid selected from the group consisting of organic acids, inorganic acids, solutions of organic acids, solutions of inorganic acids and mixtures thereof, wherein the multimetal oxide material M is prepared with the proviso that, in the course of the preparation of the multimetal oxide material M, no precursor multimetal oxide material of the multimetal oxide material M is washed with a liquid selected from the group consisting of organic acids, inorganic acids, solutions of organic acids, solutions of inorganic acids, solutions of inorganic acids and mixtures thereof.