| 复合氧化物LaMgAlO催化剂催化酯交换合成碳酸二丙酯 |
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| 引用本文： | 马清祥,赵天生,马金婵,王亚权. 复合氧化物LaMgAlO催化剂催化酯交换合成碳酸二丙酯[J]. 石油化工, 2012, 41(3): 308-312 |
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| 作者姓名： | 马清祥 赵天生 马金婵 王亚权 |
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| 作者单位： | 1. 宁夏大学天然气转化国家重点实验室培育基地,宁夏银川,750021
2. 天津大学化工学院绿色合成与转化教育部重点实验室,天津,300072 |
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| 基金项目： | 教育部新世纪优秀人才计划，宁夏自然科学基金，宁夏大学自然科学基金 |
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| 摘 要： | 采用共沉淀法制备了复合氧化物LaMgAlO催化剂,采用XRD和DTA手段对催化剂进行了表征,并考察了LaMgAlO催化剂对丙醇与碳酸二甲酯(DMC)酯交换合成碳酸二丙酯(DPC)反应的性能。实验结果表明,当复合氧化物为n(La)∶n(Mg)∶n(Al)=0.7∶3∶1(即0.7 LaMgAlO催化剂具有水滑石结构)时,在650℃下焙烧5 h制备的0.7 LaMgAlO催化剂对合成DPC的酯交换反应的活性最高;最佳的工艺条件为:反应温度90℃、n(丙醇)∶n(DMC)=3、催化剂用量3.0%(w)、反应时间6 h,在此条件下,DMC的转化率达到97.4%,DPC的选择性达到95.4%。
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| 关 键 词： | 水滑石 复合氧化物催化剂 碳酸二甲酯 正丙醇 酯交换 碳酸二丙酯 |
Synthesis of Dipropyl Carbonate by Transesterification on Composite Oxide Catalyst LaMgAlO |
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| Ma Qingxiang , Zhao Tiansheng , Ma Jinchan , Wang Yaquan. Synthesis of Dipropyl Carbonate by Transesterification on Composite Oxide Catalyst LaMgAlO[J]. Petrochemical Technology, 2012, 41(3): 308-312 |
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| Authors: | Ma Qingxiang Zhao Tiansheng Ma Jinchan Wang Yaquan |
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| Affiliation: | 1.State Key Laboratory Cultivation Base of Natural Gas Conversion,Ningxia University,Yinchuan Ningxia 750021,China; 2.Key Laboratory of Green Synthesis and Conversion Technology,Tianjin University,Tianjin 300072,China) |
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| Abstract: | Composite oxides LaMgAlO with different La amount were prepared by co-precipitation and were characterized by means of XRD and DTA.The performances of the catalysts for synthesis of dipropyl carbonate(DPC) through transesterification of dimethyl carbonate(DMC) with n-propanol were investigated.The results indicated that when the molar ratio of La∶Mg∶Al was 0.7∶3∶1,the catalyst exhibited the highest catalytic activity.Under the optimum reaction conditions:90 ℃,6 h,n(n-propanol)∶n(DMC) 3 and amount of the catalyst in the reactants 3.0%(w),the conversion of DMC and the selectivity to DPC reached 97.4% and 95.4%,respectively. |
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| Keywords: | hydrotalcite composite oxide catalyst dimethyl carbonate n-propanol transesterification dipropyl carbonate |
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