中国化学工程学报（英文版）
中國化學工程學報（英文版）
중국화학공정학보（영문판）
CHINESE JOURNAL OF CHEMICAL ENGINEERING
2013年
8期
927-932
,共6页
王娜%耿艳楼%安华良%赵新强%王延吉
王娜%耿豔樓%安華良%趙新彊%王延吉
왕나%경염루%안화량%조신강%왕연길
2%4-toluene diamine%urea%toluene-2%4-bisurea%reaction kinetics
Toluene-2,4-bisurea (TBU) is an important intermediate for urea route to dimethyl toluene-2,4-dicarbamate and the study on TBU synthesis via the reaction of 2,4-toluene diamine (TDA) and urea is of great significance. Firstly, thermodynamic analysis shows that the reaction is exothermic and a high equilibrium conversion of TDA is expected due to its large reaction equilibrium constant. Secondly, under the suitable reaction conditions, 130 °C, 7 h, and molar ratio of TDA/zinc acetate/urea/sulfolane=1/0.05/3.5/10, TDA conversion is 54.3%, and TBU yield and selectivity are 39.8%and 73.3%respectively. Lastly, the synthesis of TBU is a 1st order reaction with respect to TDA and the reaction kinetics model is established. This work will provide useful information for commercializing the urea route to toluene-2,4-dicarbamate (TDC).
