Zheng Zhi-hu
2014
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Journal
Journal of North University of China
Abstract
Dimethylhexane-1,6-dicarbamate was synthesized by microwave heating under atmospheric pressure with dimethyl carbonate and hexane-1,6-diamine. The influencing factors on yield of dimethylhexane-1,6-dicarbamate were investigated,such as the presence of catalyst,the kind and amount of catalyst,raw material ratio,reaction temperature and reaction time. The experimental results show that microwave reaction has a good promoting effect,not only in improving the product yield greatly in shortening the reaction time. The better process conditions are organized as follows: the ratio of hexane-1,6-diamine and dimethyl carbonate is 4∶ 1,tetraethyl ammonium bromide is used as catalyst and addition amount of hexane-1,6-diamine is 0. 3%,at 85℃ and after reacting 30 min,through washing with the dilute hydrochloric acid and recrystallization with ethanol,dimethylhexane-1,6-dicarbamate gets average yield of 82%. The structure of production is characterized by FT-IR,1HNMR and elemental analysis.