PURPOSE: To advantageously obtain the titled compound, by reacting methyl tertiary butyl ether with a molecular oxygen-containing gas in the presence of a specific ring-shaped oxidation catalyst containing molybdenum.
CONSTITUTION: Methyl tertiary butyl ether is oxidized with a molecular oxygen- containing gas by using a ring-shaped catalyst which comprises a catalytically active substance having a composition shown by the formula (Mo is molybdenum; W is tungsten; Bi is bismuth; Fe is iron; A is nickel; B is alkali metal; C is phosphorus; D is silicon; aWh and X are numbers of atoms. of Mo, W, B, Fe, AWD and O; b=0 when a=12, c=0.1W10; d=0.1W20; e=2W20; f=0W10; g=0W4; h=0W30; x is value fixed by valence of each element), has shape of 3.0W10.0mm outer diameter, length of 0.5W2.0 times as long as the outer diameter and through hole having a diameter corresponding to 0.1W0.7 the outer diameter to give the aimed compound.
AOKI YUKIO
WADA MASAHIRO
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