Liquid-liquid equilibrium for double solvent extraction of methyl methacrylate from methanol

GUO Wei; YAN Ruiyi; ZHOU Qing; ZHANG Suojiang

doi:10.3969/j.issn.0438-1157.2014.07.032

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Liquid-liquid equilibrium for double solvent extraction of methyl methacrylate from methanol

更新时间：2025-12-10

- Liquid-liquid equilibrium for double solvent extraction of methyl methacrylate from methanol
- CIESC Journal Issue 7, Pages: 2717-2723(2014)
- 作者机构：
  
  中国科学院过程工程研究所,北京,100190
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.07.032
  CLC： Q028.4
- Online First：05 July 2014，
  
  Published：05 July 2014
- 稿件说明：
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GUO Wei, YAN Ruiyi, ZHOU Qing, et al. Liquid-liquid equilibrium for double solvent extraction of methyl methacrylate from methanol[J]. CIESC Journal, 2014, (7): 2717-2723.
DOI：

GUO Wei, YAN Ruiyi, ZHOU Qing, et al. Liquid-liquid equilibrium for double solvent extraction of methyl methacrylate from methanol[J]. CIESC Journal, 2014, (7): 2717-2723. DOI： 10.3969/j.issn.0438-1157.2014.07.032.

摘要

针对甲基丙烯酸甲酯（MMA）-甲醇共沸体系，常规精馏难以分离。提出采用己烷-水双溶剂体系萃取分离MMA的新工艺。测定了不同温度下MMA（1）+甲醇（2）+正己烷（3）+水（4）、MMA（1）+甲醇（2）+环己烷（3）+水（4）两个体系的相平衡数据，考察了不同温度下溶剂正己烷/环己烷、水的用量对萃取分配系数和选择性系数的影响。在实验数据的基础上，进一步采用UNIQUAC模型对该体系的相平衡进行了拟合，获得了模型参数。

Abstract

Methyl methacrylate (MMA) is an important monomer

which is widely used for producing acrylic resins or polymer dispersions. The two-step selective oxidation process which selectively oxidizes isobutylene to MMA via methacrolein is regarded as a promising process for its high atomic efficiency. In the process

separation of MMA is a critical technique due to high methanol concentration in the reaction. Traditional distillation could not be used for separation of MMA from methanol because of azeotrope mixture. Double solvent extraction is a good alternative. The liquid-liquid equilibrium (LLE) data for MMA-methanol-hexane-water quaternary system were determined at 293.15 K and 303.15 K under atmospheric pressure. N-Hexane-water solvent system and cyclohexane-water solvent system were used for the MMA extraction from methanol. The activity coefficient model of universal quasi-chemical (UNIQUAC) was used to regress the LLE data of the investigated systems. The parameters of the UNIQUAC model were obtained.

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