| 摘要 |
<p>A process for producing methacrylic acid and/or methacrylic acid ester by oxidative dehydrogenation of isobutyric acid and/or isobutyric acid ester, wherein the improvement comprises using a catalyst having the composition represented by
<Chemistry id="chema01" num="0001"><Image id="ia01" he="7" wi="54" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>(where X denotes at least one element selected from the group consisting of lithium, beryllium, magnesium, barium, tin, lead, chromium, tungsten, and tellurium; subscripts a, b, c, d, e, f, and g each denote the ratio of the respective elements; b, c, d, e, and f are in the range of 0≦b≦3, 0.2≦c≦2,0.005≦d≦2,0.005≦e≦0.2, and 0≦f≦2, respectively, when a is 12, and the value of g is determined according to the ratio and valence of the other elements), and at least a part of the composition having the heteropoly acid structure.</p> |
