不同催化剂对苯酚H2O2羟基化反应的比较  

Comparasion of Different Catalysts on Phenol Hydroxylation

作　　者：徐明涛[1] 赵亮亮[1] 朱艳婧 童莺[1] 陈庆渺[1] 杨柏林[1] 王康斌[1] 杨元法[1] 

机构地区：[1]浙江师范大学物理化学研究所,浙江省固体表面反应化学重点实验室,金华321004 [2]浙江仙琚制药股份有限公司,仙居

出　　处：《应用化学》2010年第12期1419-1423,共5页Chinese Journal of Applied Chemistry

基　　金：浙江省大学生科研创新团队资助项目

摘　　要：用苯酚、双氧水经羟基化反应合成邻、对苯二酚,在Fe2O3为催化剂的反应系统中,反应诱导期长,且反应剧烈;当以杂多酸盐或Fe/ZrO2为催化剂时,诱导期消失,且羟基化反应平稳。反应的诱导期可能是由铁的氧化物转化为活性物种Fe3+和Fe2+的过程引起的;在杂多酸盐或Fe/ZrO2催化剂的反应体系中,羟基化反应可能发生在催化剂表面而使反应变得缓慢平稳,反应诱导期消失。Fe2O3,heteropoly salt and Fe/ZrO2 exhibited high catalytic activity toward phenol hydroxylation using H2 O2 as oxidant.A rapid hydroxylation of phenol was observed after an induction period in the hydroxylation of phenol catalyzed by Fe2 O3;however,a slow hydroxylation of phenol was observed and the induction period disappeared in the same system catalyzed by heteropoly salt or Fe/ZrO2.The results suggest that,first,an induction period in hydroxylation of phenol is related to the formation of active species Fe3＋and Fe2＋ from Fe2O3;and second,the slow hydroxylation is related to the surface catalysis reaction on heteropoly salt or Fe/ZrO2,leading to the disappearance of the induction period.

关 键 词：苯酚羟基化 FE2O3 诱导期 杂多酸盐 ·OH自由基 

分 类 号：O643.3[理学—物理化学]