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由2-萘酚经亚硝化、加成、络合、中和反应合成了C.I.颜料绿8(简称PG8).考察了对二甲苯/H2O2直接羟基化制备2,5-二甲基苯酚反应中PG8催化性能.结果表明该催化剂具有一定的催化活性.研究了催化剂用量、反应温度、反应时间、反应物摩尔比、溶剂等对催化剂活性的影响.20.0 mL乙腈溶剂,0.1 g催化剂,H2O2与对二甲苯摩尔比为5,温度60℃,反应5 h,对二甲苯的转化率达到55.9%,2,5-二甲基苯酚的收率达到10.1%.
CI Pigment Green 8 (PG8) was synthesized from 2-naphthol by nitrosation, addition, complexation and neutralization reactions.The effects of p-xylene / H2O2 direct hydroxylation on the production of 2,5-dimethylphenol PG8 catalytic performance.The results show that the catalyst has a certain catalytic activity.The effects of the amount of catalyst, reaction temperature, reaction time, molar ratio of reactants, solvent on the activity of the catalyst were investigated.Effects of 20.0 mL of acetonitrile solvent, 0.1 g of catalyst, H2O2 and Xylene molar ratio of 5, the temperature of 60 ° C, the reaction 5 h, p-xylene conversion rate of 55.9%, 2,5-dimethylphenol yield of 10.1%.