| 摘要 |
PURPOSE:To obtain the titled compound in high yield, by carrying out catalytic vapor-phase oxidation of isobutylene and/or t-butyl alcohol and contacting the produced oxidation product gas with a solid compound of an alkaline earth metal in gaseous state at elevated temperature. CONSTITUTION:Isobutylene and/or tert-butyl alcohol are subjected to catalytic vapor-phase oxidation with molecular oxygen or a gas containing molecular oxygen and the produced oxidized gas is brought into contact with a solid compound (especially preferably oxide or carbonate) of one or more alkaline earth metals selected from beryllium, calcium, magnesium, strontium and barium to obtain methacrolein. Preferably, a packed layer of the solid compound containing alkaline earth metal is placed immediately after an oxidation catalyst layer. The yield of high-boiling acid such as maleic acid, terephthalic acid, etc., can be decreased. |
