Measurement of vapor-liquid equilibrium data and azeotropic analysis for 2,4-toluene diisocyanate +entrainer

XU Mian; WU Liangheng; ZHANG Jie

doi:10.11949/j.issn.0438-1157.20150433

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Measurement of vapor-liquid equilibrium data and azeotropic analysis for 2,4-toluene diisocyanate +entrainer

更新时间：2025-12-10

- Measurement of vapor-liquid equilibrium data and azeotropic analysis for 2,4-toluene diisocyanate +entrainer
- CIESC Journal Issue 5, Pages: 1673-1679(2016)
- 作者机构：
  
  华东理工大学材料科学与工程学院,上海,200237
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150433
  CLC： Q013.1
- Online First：05 May 2016，
  
  Published：05 May 2016
- 稿件说明：
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XU Mian, WU Liangheng, ZHANG Jie. Measurement of vapor-liquid equilibrium data and azeotropic analysis for 2,4-toluene diisocyanate +entrainer[J]. CIESC Journal, 2016, (5): 1673-1679.
DOI：

XU Mian, WU Liangheng, ZHANG Jie. Measurement of vapor-liquid equilibrium data and azeotropic analysis for 2,4-toluene diisocyanate +entrainer[J]. CIESC Journal, 2016, (5): 1673-1679. DOI： 10.11949/j.issn.0438-1157.20150433.

摘要

在脱除游离甲苯二异氰酸酯(F-TDI)的共沸蒸馏研究中

缺少2

4-TDI与共沸剂的二元体系汽液平衡数据及基础热力学参数。采用自制的汽液平衡釜

测定了0.55 kPa压力下

4-TDI/苯甲酸乙酯、2

4-TDI/丁二酸二乙酯、2

4-TDI/己二酸二甲酯三组二元体系的汽液平衡数据

所得数据通过了热力学一致性面积检验。借助流程模拟软件Aspen Plus对实验数据进行了回归

得到3组UNIQUAC模型参数及关联偏差

气相摩尔分数平均偏差分别为0.0067、0.0083和0.0179

平衡温度平均绝对偏差分别为0.7 K、1.2 K和0.5 K。进而对共沸体系进行了共沸分析

得到了共沸组成和共沸条件

为F-TDI的共沸分离技术提供了工艺参数。

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)

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.

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