| 摘要 |
PROBLEM TO BE SOLVED: To improve the efficiency of treatment of formic acid and formaldehyde by using a catalyst in which ruthenium and tellurium are supported on an inorganic oxide carrier as a solid catalyst when wastewater containing acetic acid, formic acid, and formaldehyde is treated by passing it continuously through a solid catalyst layer. SOLUTION: When wastewater containing acetic acid, formic acid, and formaldehyde is treated by passing it continuously through a solid catalyst layer under a pressure to keep it a liquid phase in the presence of an oxygen-containing gas, a catalyst in which ruthenium and tellurium are supported on an inorganic oxide carrier is used as the solid catalyst. In this way, the wastewater is subjected to wet catalytic oxidation treatment so that components other than acetic acid are decomposed selectively to recover acetic acid left in the treated 1iquid selectively and efficiently. The amount of supported ruthenium is 0.5-5 wt.% of the total weight of the catalyst, and the amount of tellurium is 0.1-2 wt.% of the total weight of the catalyst.
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