石油化工2017，Vol.46Issue(8)：973-978,6.DOI:10.3969/j.issn.1000-8144.2017.08.002
碳酸酯法合成甲苯-2,4-二氨基甲酸苯酯反应的溶剂效应
Solvent effect on synthesis of diphenyl toluene-2,4-dicarbamate via carbonate route
张雨蒙 1王桂荣 1贾晓强 1赵新强 1王延吉1
作者信息
摘要
Abstract
The effect of solvents and catalysts on the synthesis of diphenyl toluene-2,4-dicarbamate (TDC) from toluene-2,4-diamine(TDA) and diphenyl carbonate(DPC) was studied.The reaction course and solvent effect were analyzed.The results showed that the polarity and the steric hindrance of solvents have influence on the reaction;N-methyl pyrrolidone(NMP) is an excellent solvent and Pb3O4 exhibits high catalytic activity for the reaction.Under the suitable reaction conditions with molar ratio Pb3O4/TDA 0.25,DPC/TDA 4,reaction temperature 120 ℃,and reaction time 8 h,TDA conversion 87.6％ and TDC yield 75.3％ were attained in the presence of NMP solvent.As using a mixed solvent with a volume ratio DMAC/NMP 1 ∶ 2,TDC yield and selectivity reached 83.5％ and 99.1％,respectively.关键词
碳酸酯法/2,4-甲苯二胺/甲苯-2,4-二氨基甲酸苯酯/四氧化三铅/N-甲基吡咯烷酮Key words
carbonate route/toluene-2,4-diamine/diphenyl toluene-2,4-dicarbamate/Pb3O4/N-methyl pyrrolidone分类
化学化工引用本文复制引用
张雨蒙,王桂荣,贾晓强,赵新强,王延吉..碳酸酯法合成甲苯-2,4-二氨基甲酸苯酯反应的溶剂效应[J].石油化工,2017,46(8):973-978,6.
