| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing dicarboxylic acids from lactones on an industrial scale at a low cost. <P>SOLUTION: Dicarboxylic acids are produced by reacting 5-, 6- or 7-membered ring lactones with hydrogen peroxide in the presence of water and a metal oxide catalyst obtained by reacting at least one kind of substance selected from metallic tungsten, metallic molybdenum, tungsten compounds composed of tungsten and a group IIIb, group IVb, group Vb or group VIb element and molybdenum compounds composed of molybdenum and a group IIIb, group IVb, group Vb or group VIb element with hydrogen peroxide. <P>COPYRIGHT: (C)2003,JPO |
