化工学报2016，Vol.5Issue(5)：1673-1679,7.DOI:10.11949/j.issn.0438-1157.20150433
2,4-TDI/共沸剂二元体系的汽液平衡数据的测定及共沸组成分析
Measurement of vapor-liquid equilibrium data and azeotropic analysis for 2,4-toluene diisocyanate +entrainer
徐勉 1吴亮衡 1张杰1
作者信息
- 1. 华东理工大学材料科学与工程学院,上海 200237
- 折叠
摘要
Abstract
When conducting the removal process of free toluene diisocyanate(F-TDI)from polyurethane prepolymer by azeotropic distillation, the isobaric vapor-liquid equilibrium (VLE) data and basic thermodynamic parameters for 2,4-TDI + entrainer are missing. Isobaric VLE data for 2,4-TDI/ethyl benzoate(EBZ), 2,4-TDI/diethyl succinate (DES) and 2,4-TDI /dimethyl adipate (DMA) were measured at 0.55 kPa by using a self-made recirculation still. The binary VLE data have passed the thermodynamic consist test proposed by the area method. The parameters and regression deviations for the UNIQUAC equation were obtained by data regression with simulation system of Aspen Plus. The average deviations of vapor mole fraction were 0.0067, 0.0083 and 0.0179, and the average absolute deviations of the predicted temperature were 0.7 K, 1.2 K and 0.5 K for the three groups, respectively. Furthermore, azeotropic systems were analyzed, and the azeotropic compositions and azeotropic conditions were provided for the azeotropic distillation of F-TDI separation.关键词
游离TDI/共沸精馏/汽液平衡Key words
F-TDI/azeotropic distillation/vapor-liquid equilibrium分类
化学化工引用本文复制引用
徐勉,吴亮衡,张杰..2,4-TDI/共沸剂二元体系的汽液平衡数据的测定及共沸组成分析[J].化工学报,2016,5(5):1673-1679,7.
