| 摘要 |
An improved catalyst comprising a mixed metal oxide is prepared by the use of a sol-gel technique. The mixed metal oxide catalyst comprising Mo, V, Te and Nb is prepared by admixing compounds of these elements and at least one solvent, preferably water, to form a gel, ageing said so-formed gel and calcining it. The catalyst is useful for the conversion of an alkane, or a mixture of an alkane and an alkene, to an unsaturated carboxylic acid by vapor phase oxidation, or to an unsaturated nitrile by vapor phase oxidation in the presence of ammonia. |
