| 预处理对TS-1/硅藻土催化剂性能的影响 |
| Effect of Pretreatment on Properties of TS-1/Diatomite Catalyst |
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| 摘要: 以固定床催化苯酚羟基化制苯二酚为目标反应，制备了负载型TS-1/硅藻土催化剂。运用FT-IR、XRD、UV-Vis、ICP-AES和NH3-TPD等表征手段，研究了预处理介质对TS-1/硅藻土催化剂物化和催化性能的影响。研究表明，用KAc、NaAc、NH4Ac、NH4Cl和HNO3水溶液预处理催化剂后，对TS-1分子筛的骨架结构和骨架Ti的存在无明显影响，但可脱除部分非骨架TiO2，使催化剂的表面 |
| 关键词: TS-1/硅藻土 预处理 苯酚 羟基化 固定床反应器 |
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| Abstract: The TS-1/diatomite catalyst was prepared for the hydroxylation of phenol with H2O2 in a fixed-bed reactor and the effect of pretreatment on the properties of TS-1/diatomite were studied with FT-IR， XRD， UV-Vis， ICP-AES and NH3-TPD techniques. It was shown that the framework structure of TS-1 pretreated with aqueous solutions of KAc， NaAc， NH4Ac， NH4Cl and HNO3 was not destroyed and titanium in the framework was not removed， but some extra-framework TiO2 could be removed partly， and the acid concentration on the surface of the TS-1/di-atomite catalyst decreased slightly， which improves the activity， selectivity and utilization of H2O2 for hydroxylation of phenol. When the TS-1/diatomite catalyst was pretreated by bases solutions of NH3·H2O， Na2CO3 and Na3PO4， the framework silicon was dissolved partly and the framework structure of TS-1 was destroyed， which leads to the slight increase of strength and concentration of acid sites on the surface of catalyst， and the decrease or loss of the framework titanium， and so that the catalytic activity of the TS-1/diatomite catalyst for hydroxylation of phenol descended or deactivated completely. |
| Keywords: TS-1/diatomite pretreatment phenol hydroxylation fixed bed reactor |
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| 刘 红,卢冠忠,郭杨龙,郭 耘,王筠松.预处理对TS-1/硅藻土催化剂性能的影响[J].无机化学学报,2003,19(11):1202-1206. |
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