| 超声波技术制备功能化二氧化硅在苯酚和碳酸二甲酯甲基化反应中的应用 |
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| 引用本文： | 张雪红,陈冰,魏伟,孙予罕.超声波技术制备功能化二氧化硅在苯酚和碳酸二甲酯甲基化反应中的应用[J].中国化学,2005,23(10):1376-1380. |
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| 作者姓名： | 张雪红 陈冰 魏伟 孙予罕 |
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| 作者单位： | [1]State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, China |
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| 摘 要： | Porous silica modified with -（CH2）3NH2 （primary amine）, -（CH2）3NHCH2CH2NH2 （secondary/primary amine） and -（CH2）3N-cycl-（CH2）4 （tertiary amine） were synthesized by ultrasonic technique under mild conditions. The samples were characterized by BET, elemental analysis and TG, showing that the organosilane moieties were grafted onto the surface of porous silica by covalent bond. The structure of the organosilane moieties and ultrasonic treatment time were all significant for the quantities of grafted amino groups. The samples exhibited promising catalytic properties towards the methylation reaction of phenol with dimethyl carbonate （DMC）. The methylation reaction with the modified samples featured high selectivity at high conversion. The samples were subjected to utilization for a few recycles without obvious loss of activity to indicate that ultrasonic technique was effective for the preparation of organically modified porous silica catalysts.
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| 关 键 词： | 甲基化物 苯酚 二甲基碳酸盐 超声波 |
| 收稿时间： | 2005-01-11 |
| 修稿时间： | 2005-01-112005-06-20 |
Preparation of Functionalized Porous Silica by Ultrasonic Technique for the Methylation Reaction of Phenol with Dimethyl Carbonate |
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| Zhang XueGong;Chen Bing;Wei Wei;Sun YuHan.Preparation of Functionalized Porous Silica by Ultrasonic Technique for the Methylation Reaction of Phenol with Dimethyl Carbonate[J].Chinese Journal of Chemistry,2005,23(10):1376-1380. |
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| Authors: | Zhang XueGong;Chen Bing;Wei Wei;Sun YuHan |
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| Abstract: | Porous silica modified with ? (CH2)3NH2 (primary amine), ? (CH2)3NHCH2CH2NH2 (secondary/primary amine) and ? (CH2)3N‐cycl‐(CH2)4 (tertiary amine) were synthesized by ultrasonic technique under mild conditions. The samples were characterized by BET, elemental analysis and TG, showing that the organosilane moieties were grafted onto the surface of porous silica by covalent bond. The structure of the organosilane moieties and ultrasonic treatment time were all significant for the quantities of grafted amino groups. The samples exhibited promising catalytic properties towards the methylation reaction of phenol with dimethyl carbonate (DMC). The methylation reaction with the modified samples featured high selectivity at high conversion. The samples were subjected to utilization for a few recycles without obvious loss of activity to indicate that ultrasonic technique was effective for the preparation of organically modified porous silica catalysts. |
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| Keywords: | functionalized porous silica ultrasonic technique methylation reaction |
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