二乙氧基甲烷-乙醇-水-甘油体系部分组分液液平衡

Liquid-liquid equilibrium for diethoxymethane-ethanol-water-glycerin system

用液液平衡釜测定了二乙氧基甲烷-水、二乙氧基甲烷-甘油2组二元和二乙氧基甲烷-水-甘油、二乙氧基甲烷-乙醇-甘油、二乙氧基甲烷-水-乙醇3组三元体系常温、常压下的液液平衡数据。用NRTL和UNIQUAC方程对所测二元体系的平衡数据进行了处理。采用单参数法关联了乙醇-甘油体系的模型参数。结合三元体系的液液平衡数据,用NRTL和UNIQUAC方程关联出了三元体系中的第3对模型参数。确定了二乙氧基甲烷-乙醇-水-甘油体系合适的模型及参数,为含二乙氧基甲烷体系的实际分离过程提供了依据。

Liquid-liquid equilibrium data for two binary systems of diethoxymethane-water,and diethoxymethane-glycerin,three ternary systems of diethoxymethane-water-glycerin,diethoxymethane-ethanol-glycerin,and diethoxymethane-water-ethanol were measured at normal temperature and pressure by using a liquid-liquid equilibrium pot.The binary data were treated by NRTL and UNIQUAC models.The interaction parameters for ethanol-glycerin were got by single-parameter.The third pair model parameters of the ternary system were correlated by NRTL and UNIQUAC models with ternary liquid-liquid equilibrium data.The proper models and parameters were determined for diethoxymethane-water-ethanol-glycerin system,which provides a basis for practical separating process including diethoxymethane system.