Catalytic Synthesis of Methylene Diphenyl Dicarbamate in AcOH/H2O Mixed Solvent

被引：0

作者：

Pei Yi-xia ^{[1
,2
]}

Li Hui-quan ^{[1
]}

Liu Hai-tao ^{[1
]}

Zhang Qin-hua ^{[1
,2
]}

Zhang Yi ^{[1
]}

机构：

[1] Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

CHEMICAL RESEARCH IN CHINESE UNIVERSITIES | 2010年 / 26卷 / 04期

关键词：

Mixed solvent; Methylene diphenyl dicarbamate; Formaldehyde; Liquid acid; N-PHENYL CARBAMATE; DIMETHYL CARBONATE; MILD CONDITIONS;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In a mixed solvent of acetic acid(AcOH)/water, methylene diphenyl dicarbamate(MDC) was synthesized by the condensation of methyl phenyl carbamate(MPC) and formaldehyde in the presence of an inorganic acid catalyst. Based on the different solubilities to MPC and MDC, the mixed solvent showed higher catalytic performance than pure water. The mixed solvent not only promoted the condensation of MPC but aslo exhibited the advantage of the product separation with the reactants. Under the optimized conditions: a H2SO4 mass fraction of 31%, a reaction temperature of 95 degrees C and reaction time of 3.5 h, the yield of MDC reached 74.3%. In addition, the recycle of the solvent was also investigated.

引用

页码：550 / 553

页数：4

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