CAJ | 학술논문

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。
침대갑기병희산갑지(MMA)-갑순공비체계，상규정류난이분리。제출채용기완-수쌍용제체계췌취분리MMA적신공예。측정료불동온도하MMA(1)+갑순(2)+정기완(3)+수(4)、MMA(1)+갑순(2)+배기완(3)+수(4)량개체계적상평형수거，고찰료불동온도하용제정기완/배기완、수적용량대췌취분배계수화선택성계수적영향。재실험수거적기출상，진일보채용UNIQUAC모형대해체계적상평형진행료의합，획득료모형삼수。
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 MMAvia 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.