A new catalyst for hydroxylation of benzene to phenol
- 化学化工－已发表论文 
Phenol is a monomer widely used in petrochemical industry, agriculture and plastic industry. Phenol can be obtained from the partial oxidation of benzene and the procedure is simple. In 1988 Suzki et al.() and Gubel et al.() independently discovered a new kind of catalysts, HZSM-5 zeolites, for this reaction. The oxidation of benzene by nitrous oxide over the catalysts proceeded at 300-400 degrees C with the yield of phenol from 8% to 16%. Cao et al.() reported that by using Fe2O3-CuO-MnO2/sepiolite as the catalyst and H2O2 as the oxidant, the conversion of benzene reached 36.26% and the selectivity for phenol was 93.45%. This paper presents for the first time a new catalyst, Fe2O3-La2O3 / HZSM-5, in which La2O3 acts as a promoter. This catalyst has been used for the hydroxylation of benzene to phenol, the maximum conversion of benzene was up to 40.2 % and the maximum selectivity for phenol was 94.0 %. The result shows this catalyst has a potential prospect of application.