常温下H_2O_2氧化高浓度苯酚水溶液制备苯二酚  

Oxidation of Phenol With High Concentration in Aqueous Solution to Diphenol by H_2O_2 Under Room Temperature

作　　者：席涛[1] 马红蕾[1] 张颖杰[1] 陈强[1] 孔岩[1] 

机构地区：[1]南京工业大学化学化工学院材料化学工程国家重点实验室,江苏南京210009

出　　处：《石油学报（石油加工）》2016年第1期201-206,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金(21276125;21476108);江苏省高校研究生科研创新计划(CXLX13_430)项目资助

摘　　要：以表面活性剂为苯酚增溶剂,水为溶剂,H_2O_2为氧化剂,0.5B-0.5Cr-4Fe-MCM-41为催化剂,催化苯酚羟基化反应合成苯二酚,考察了表面活性剂种类、苯酚在水中的质量分数(m(Phenol)/(m(Phenol)+m(H_2O)))、苯酚与H2O2的摩尔比(n(Phenol)/n(H_2O_2))、反应温度对该反应的影响。结果表明,在以十二烷基磺酸钠为增溶剂、m(Phenol)/(m(Phenol)+m(H2O))=0.30、n(Phenol)/n(H_2O_2)=3、反应温度25℃、反应时间2h的条件下,苯酚羟基化反应的苯酚转化率达到24.2%,苯二酚的选择性达到94.8%,且0.5B-0.5Cr-4Fe-MCM-41催化剂具有良好的重复使用性能,基本满足工业化要求。With surfactants as solubilizer, water as solvent, H202 as oxidizer, 0. 5B-0. 5Cr-4Fe-MCM-41 as catalyst, catechol and hydroquinone were synthesized from phenol. The effects of the surfactant kinds, mass fraction of phenol in water （rn （Phenol）/（m （Phenol） ＋ m （ H2 O）） ）, molar ratio of phenol to H2O2 （n（Phenol）/n（H2 02））, reaction temperature on the hydroxylation of phenol were investigated. Under the optimal reaction conditions, i.e., SDS as solubilizer, rn （Phenol）/ （re（Phenol） ＋m（H2O） ） = 0.30, n（Phenol）/n（H2 O2 ） = 3, 24.2 % conversion of phenol and 94.8 % selectivity of diphenol were achieved after reacted at 25℃ for 2 h. The reusability of 0. 5B-0.5Cr-4Fe-MCM-41 catalyst was excellent, meaning that this technology can fully match the industrial application,

关 键 词：介孔分子筛 苯酚羟基化 高浓度 表面活性剂 常温 

分 类 号：TQ426.6[化学工程] TQ032.4