| 磷钨酸催化合成二苯甲烷二氨基甲酸甲酯 |
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| 引用本文： | 王贺玲,王杲,何国锋,田恒水.磷钨酸催化合成二苯甲烷二氨基甲酸甲酯[J].精细化工,2009,26(4). |
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| 作者姓名： | 王贺玲 王杲 何国锋 田恒水 |
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| 作者单位： | 华东理工大学,化工学院,上海,200237 |
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| 摘 要： | 以磷钨酸为催化剂,考察了苯氨基甲酸甲酯(MPC)与甲醛缩合制备二苯甲烷二氨基甲酸甲酯(MDC)的工艺条件。结果表明,磷钨酸对二苯甲烷二氨基甲酸甲酯的合成具有较好的催化效果;在二乙二醇二乙醚为溶剂,n(MPC)∶n(HCHO)=5∶1,催化剂用量m(磷钨酸)∶m(MPC+HCHO)=(0.08～0.10)∶1,于110℃反应4.5h的条件下,MDC的收率为64.9%,选择性达到80.9%。
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| 关 键 词： | 苯氨基甲酸甲酯 甲醛 二苯甲烷二氨基甲酸甲酯 磷钨酸 精细化工中间体 |
Synthesis of Methylene Diphenyl Dicarbamate Catalyzed by Phosphotungstic Acid |
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| WANG He-ling,WANG Gao,HE Guo-feng,TIAN Heng-shui.Synthesis of Methylene Diphenyl Dicarbamate Catalyzed by Phosphotungstic Acid[J].Fine Chemicals,2009,26(4). |
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| Authors: | WANG He-ling WANG Gao HE Guo-feng TIAN Heng-shui |
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| Affiliation: | School of Chemical Engineering;East China University of Science and Technology;Shanghai 200237;China |
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| Abstract: | The synthesis of methylene diphenyl dicarbamate(MDC) by the polycondensation reaction of methyl N-phenyl carbamate (MPC)with formaldehyde (HCHO) with phosphotungstic acid as catalyst,was investigated in this paper.The mechanism of MPC reacting with HCHO was also proposed.Experiment results show that phosphotungstic acid is a preferable catalyst,and diethylene glycol diethyl ether is a solvent,n(MPC)∶n(HCHO)=5∶1,m(phosphotungstic acid)∶m(MPC+HCHO)=(0.08～0.10)∶1.Under the above conditions,MPC reacting with HCHO at 110 ℃ for 4.5 h.The yield and selectivity of MPC were 64.9% and 80.9% respectively. |
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| Keywords: | methyl N-phenyl carbamate formaldehyde methylene diphenyl dicarbamate phosphotungstic acid fine chemical intermediates |
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