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摘要: 采用四丙基氢氧化铵(TPAOH)溶液对微米TS-1进行改性,考察了TPAOH的浓度、处理温度及处理时间等条件对TS1催化性能的影响。对改性前后的微米TS1进行了XRD、FTIR、UVVis、SEM、TEM及N2物理吸附等表征,以苯酚羟基化及丁酮氨氧化反应为探针评价了其催化性能。结果表明,改性后的TS-1基本结构没有明显的变化,但在内部出现蚀刻现象。TPAOH改性后的TS-1在苯酚羟基化及丁酮氨氧化反应中的催化性能明显提高。最佳改性条件为,TPAOH溶液浓度 0.15mol/ L,改性温度170℃,改性时间48h。Abstract: Micrometer-sized TS-1 has been modified with tetrapropylammonium hydroxide (TPAOH) solution. The effects of modification conditions, including temperature, time and concentration of TPAOH, on the catalytic properties of TS-1 in the hydroxylation of phenol and ammoxidation of methyl ethyl ketone (MEK) were investigated. The modified samples were characterized with XRD, SEM, TEM, UV-Vis and FT-IR techniques and N2 adsorption experiment. It was shown that the structure of TS-1 was basically unchanged after the modification, but etching occurred, as proved by the presence of a number of small caves in the modified samples. The optimum modification condition was as follows: TPAOH concentration of 0.15mol/L, time of 48h and temperature of 170℃. The sample modified under this condition showed a significant improvement in the catalytic performances in the hydroxylation of phenol and ammoxidation of methyl ethyl ketone.
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Key words:
- TS-1 /
- zeolite /
- TPAOH /
- hydroxylation of Phenol /
- ammoxidation of methyl ethyl ketone /
- hydrogen peroxide
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