| 复合金属氧化物催化尿素醇解合成碳酸二乙酯 |
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| 引用本文： | 范明明,亢连香,倪邦庆.复合金属氧化物催化尿素醇解合成碳酸二乙酯[J].天然气化工,2012,37(2):24-27. |
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| 作者姓名： | 范明明 亢连香 倪邦庆 |
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| 作者单位： | 江南大学化学与材料工程学院,江苏无锡,214122 |
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| 基金项目： | 中央高校基本科研业务费专项资金 |
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| 摘 要： | 对复合金属氧化物催化尿素醇解合成碳酸二乙酯反应进行了研究,优选出Zn-Mg-Al三元金属氧化物催化剂对其进行了BET和XRD表征分析,并对合成碳酸二乙酯的工艺参数进行了优化。研究表明当催化剂用量为4%,反应物配比n(乙醇):n(尿素)=10:1,反应温度为190℃,反应时间为7h时,碳酸二乙酯的收率可达38%以上。该催化剂具有良好的催化稳定性,经过4次循环使用,DEC收率仍保持在30%以上。
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| 关 键 词： | 碳酸二乙酯 合成 金属氧化物催化剂 尿素 乙醇 醇解 |
Synthesis of diethyl carbonate via alcoholysis of urea catalyzed by composite metal oxide catalysts |
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| FAN Ming-ming
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KANG Lian-xiang
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NI Bang-qing.Synthesis of diethyl carbonate via alcoholysis of urea catalyzed by composite metal oxide catalysts[J].Natural Gas Chemical Industry,2012,37(2):24-27. |
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| Authors: | FAN Ming-ming KANG Lian-xiang NI Bang-qing |
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| Affiliation: | (School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China) |
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| Abstract: | The synthesis of diethyl carbonate via alcoholysis of urea with the composite metal oxide catalysts was studied.Among a series of test catalysts,the Zn-Mg-Al(2∶1∶3) catalyst showed the highest catalytic activity.The catalyst was characterized by BET and XRD and the reaction parameters were optimized.For the Zn-Mg-Al(2∶1∶3) catalyst,yield of diethyl carbonate was over 38 % under the optimized reaction conditions: catalyst mass fraction of 4 %,ethanol/urea molar ratio of 10:1,reaction temperature of 190℃ and reaction time of 7 hours.The catalyst had excellent stability for the alcoholysis of urea,and the yield was still more than 30% at the fourth reuse. |
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| Keywords: | diethyl carbonate synthesis metal oxide catalyst urea ethanol alcoholysis |
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