The oxidation of phenanthrene, with peracetic acid into 2,2'-diphenic acid by means of reaction distillation has been studied. Reaction conditions were investigated by an orthogonal test, and the main technical parameters optimized. The optimum conditions were as follows: molar ratio of phenanthrene to acetic acid 1.0:25.0; molar ratio of phenanthrene to H2O2 10 : 8.0; dropping time of 30% H2O2 9 h; reaction time 18 h; solvent: benzene; reaction temperature: about 90 °C(boil). Experimental results showed that the yield of diphenic acid could reach 60%-67%, and the melting point of the product was 232～233°C.
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机译：已经研究了通过反应蒸馏将菲与过氧乙酸氧化为2,2'-二苯甲酸。通过正交试验研究反应条件，并优化了主要技术参数。最佳条件如下：菲与乙酸的摩尔比为1.0：25.0;菲与H 2 O 2的摩尔比为10：8.0。 30％H2O2的滴落时间为9小时;反应时间18小时;溶剂：苯;反应温度：约90℃（沸腾）。实验结果表明，苯二酸收率可达60％-67％，熔点为232〜233℃。
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