| 摘要 |
PURPOSE:To obtain advantageously the titled compound, by using a specific alkali metal in a molybdenum type catalyst containing thallium by oxidizing isobutylene or/and tert-butyl alcohol in the vapor phase catalytically with molecular oxygen. CONSTITUTION:In an oxidation of isobutylene and/or tert-butyl alcohol in the vapor phase catalytically with molecular oxygen or a gas containing the molecular oxygen, a catalyst having a composition expressed by the formula (X is K, Rb or/and Ce; a-h are the numbers of the respective elements, and b is 0.1-6; c is 0.5-15; d is 2-12; e is 0-10; f is 0-2; g is 0.05-1.0; h is 0.05-1.0; d+e is 6-12 when a is 12, and i is a value naturally determined depending upon the valences of the respective elements and values of a-h) is used to give the titled compound in sufficiently high yield even in >=95% conversion of the isobutylene. The above-mentioned catalyst is capable of keeping the high activity and high selectivity stably for a long term and has a long catalyst life. |
