Distribution Coefficient of Caprolactam and Methyl Caprolactam Using Benzene or Toluene as Extractants： Experiments and Prediction  

作　　者：龚行楚 吕阳成 骆广生 

机构地区：[1]State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing100084, China

出　　处：《Chinese Journal of Chemical Engineering》2007年第4期463-467,共5页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （No.20490200, No.20525622）.

摘　　要：To get high purity caprolactam is a challenging task in the chemical fiber industry. To date, reports on the prediction of the distribution of caprolactam and its derivative chemicals have been few. In this study, the extraction of caprolactam with toluene as the extractant and N-methyl caprolactam with benzene and toluene as theextractants has been camed out. By defining new UNIFAC groups and calibrating related interaction parameters, aUNIFAC method was introduced to predict the equilibrium concentration of caprolactam and methyl caprolactam intoluene or benzene extraction processes. The calculated results fit very well With the experimental data. Using theUNIFAC model, the selectivity of extractants can be predicted.To get high purity caprolactam is a challenging task in the chemical fiber industry. To date, reports on the prediction of the distribution of caprolactam and its derivative chemicals have been few. In this study, the ex-traction of caprolactam with toluene as the extractant and N-methyl caprolactam with benzene and toluene as the extractants has been carried out. By defining new UNIFAC groups and calibrating related interaction parameters, a UNIFAC method was introduced to predict the equilibrium concentration of caprolactam and methyl caprolactam in toluene or benzene extraction processes. The calculated results fit very well with the experimental data. Using the UNIFAC model, the selectivity of extractants can be predicted.

关 键 词：extraction UNIFAC model CAPROLACTAM BENZENE TOLUENE 

分 类 号：TQ420.66[化学工程]