摘要
以市售TS-1分子筛为活性组分,蜂窝状堇青石陶瓷为载体,硅溶胶(30%水溶液)为黏结剂,采用涂覆法制备TS-1/堇青石整体催化剂,并用于催化苯酚和过氧化氢(30%水溶液)的羟基化反应。在自制强制外循环间歇反应器中考察反应温度、反应时间、TS-1负载量和n(苯酚)∶n(过氧化氢)等对苯酚羟基化的影响。结果表明,添加硅溶胶后,牢固度有了很大提高。在以水为溶剂、n(苯酚)∶n(过氧化氢)=3∶1、m(H_2O)∶m(苯酚)=5∶1、m(苯酚)∶m(TS-1)=10∶1和60℃条件下反应6 h,苯酚转化率为28.3%,苯二酚选择性为93.2%。
Using commercially available TS-1 molecular sieve as the active component, cordierite ceramic honeycomb as the carrier and silica sol （30% aqueous solution） as a binder,TS-l/cordierite monolithic catalyst was prepared by coating method. The as-prepared catalyst was used to catalyze hydroxylation of phenol with hydrogen peroxide （30% aqueous solution）. The effects of reaction temperatures, reaction time ,TS-1 loading and molar ratios of phenol to hydrogen peroxide on hydroxylation of phenol were investigated in a homemade external circulation-forced batch reactor. The results showed that firmness was greatly improved after adding the silica sol. Under the condition of water as the solvent, n （ phenol ） ： n （ H2 02 ） = 3： 1, m （ H2O） ： m （phenol） = 5： 1, m （phenol） ： m （ TS-1 ） = 10： 1, reaction temperature 60 ℃ and reaction time 6 h,phenol conversion and the selectivity to hydroquinone reached 28.3% and 93.2%, respectively.
作者
陶明
刘华彦
俞喆雷
陈银飞
Tao Ming Liu Huayan Yu Zhelei Chen Yinfei(Institute of Catalytic Reaction Engineering, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China)
出处
《工业催化》
CAS
2017年第2期46-51,共6页
Industrial Catalysis
