| 张天永,刘晓思,李彬,王梦颖,王智超,海莉.化学通报,2017,80(6):573-578. |
| 偶联剂改性对γ-Al2O3催化氧化偏三甲苯性能的影响 |
| Effect of Coupling Agents Modification on the Catalytic Performance of γ-Al2O3 for Pseudocumene Oxidation |
| 投稿时间：2016-12-06 修订日期：2016-12-21 |
| DOI： |
| 中文关键词: 填料γ-Al2O3 偶联剂改性 偏三甲苯 催化氧化 三甲基苯醌 |
| 英文关键词:packing γ-Al2O3 coupling agent modification pseudocumene catalytic oxidation trimethylbenzoquinone |
| 基金项目:国家自然科学基金项目（21276187） |
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| 中文摘要: |
| 研究了偶联剂改性的价格低廉的填料级γ-Al2O3对偏三甲苯（TMB）直接催化氧化为2,3,5-三甲基苯醌（TMBQ）性能的影响。结果表明：γ-(2,3-环氧丙基)丙基三甲氧基硅烷（KH560）改性后的填料γ-Al2O3催化氧化活性较高。考察了KH560用量、水解时间、吸附时间及吸附温度对催化效果的影响。在优化条件下（2mL V（KH560）: V（EtOH）=1:25溶液，水解1h，吸附4h，吸附温度50℃），偶联剂对填料γ-Al2O3表面产生一定的包覆，在催化氧化TMB时较温和，副反应较少，TMB转化率和TMBQ选择性分别为14.3%和72.4%。 |
| 英文摘要: |
| Effect of low-cost packing γ-Al2O3 modified with different coupling agents on one-step catalytic oxidation of 1,2,4-trimethylbenzene (TMB) to 2,3,5-trimethylbenzoquinone was studied. Results show that packing γ-Al2O3 modified with 2,3-epoxypropoxy propyltrimethoxysilicane (KH560) has better catalytic effect. The effects of KH560 amount, hydrolysis time, absorption time, absorption temperature on the catalytic reaction were investigated. Packing γ-Al2O3 is coated by KH560 in some extent. Conversion(14.3%) of TMB and selectivity (72.4%) of TMBQ are obtained under optimal conditions: 2mL of V(KH560): V(EtOH)=1:25 solution, hydrolysis for 1h, absorption 4h at 50℃. TMB is mildly catalyzed and oxidized by the modified packing γ-Al2O3, which leads to less side reactions. |
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