甲醇-甲基丙烯酸甲酯-水三元系汽液平衡和液液汽平衡的研究(Ⅱ)三元系部分

本工作测定了25、35、45、55和60℃时甲醇-甲基丙烯酸甲酯-水三元系互溶区蒸汽压以及部分互溶区的液液平衡和蒸汽压数据.用各对二元系修正的UNIQUAC模型参数推算得到的三元系相平衡数据与实验值符合良好,表明这些模型参数可作为对该三元系进行由低压至常压的相平衡计算基础数据.     

甲醇-甲基丙烯酸甲酯-水三元系汽液平衡和液液汽平衡的研究——(Ⅰ)三对二元系

本工作测定了25、35、45、55和60℃时甲醇-甲基丙烯酸甲酯和甲醇—水两对二元系的蒸汽压和甲基丙烯酸中酯-水二元系的液液平衡及蒸汽压数据,用最大似然原理求得了各对二元系修正的UNIQUAC模型参数,由此推算了汽相组成,并与已经发表的文献数据作了广泛的比较.     

静态蒸汽总压法研究二氟二氯甲烷-乙醚、乙醚-丙酮二元系的恒温汽液平衡

新研制了带视镜的高压静态平衡器,可以观察平衡系统内相的分布情况及准确测定相体积,测压范围0～10MPa,实验在1/2全浓度范围内可连续进行.用此平衡器测定了二氟二氯甲烷、乙醚、丙酮在常沸点以上的蒸汽压以及二氟二氯甲烷-乙醚、乙醚-丙酮2对二元系的加压汽液平衡,获得了T、p、n_T、z以及V~g的数据.进一步用物料衡算与由T、p、x推算y的方法相结合,计算了平衡相组成x和y.汽相逸度系数用改进的PR状态方程计算.     

聚甲基丙烯酸丁酯—2－丁酮系统的恒温汽液平衡

用静态吸收－石英弹簧称重法测定了２５℃２－丁酮与３种不同分子量的单分散聚甲基丙烯酸丁酯溶液的汽液平衡。结果表明在实验误差范围内，相对蒸汽压ｐ１／ｐ对液相质量分数Ｗ１作图所得曲线与聚合物的分子量无关。Ｆｌｏｒｙ－Ｈｕｇｇｉｎｓ相互作用参数Ｘ与溶液浓度有关，聚合物分子量也有轻微影响。用修正Ｆｒｅｅｄ模型进行关联，取得了良好效果。     

VAPOR-LIQUID EQUILIBRIA FOR MIXTURES OF TOLUENE AND POLYSTYRENE WITH DIFFERENT MOLECULAR WEIGHTS

An experimental system for measuring the VLE of polymer solutions based on the staticvapor-pressure method has been established,VLE data for mixtures of toluene and polystyrene withdifferent molecular weight covering a wide range from 2.98×10~3 to 3.84×10~6 were obtained at 35℃.The reduced pressure p/p°versus weight fraction W plot is found to be independent on the molecularweight of the polymer within the experimental error.Calculated activity coefficients are also independenton the molecular weight.However,for the Flory-Huggins interaction parameter x,not only a strongconcentration dependence is observed,but also the molecular weight of the polymer exerts definiteinfluence.Generally,the parameter x slightly increases as the molecular weight of the polymer decreasesespecially when the molecular weight is low.The dependence of the parameter x on the molecularweight can be neglected when the molecular weight of polymer is greater than 1.00×10~4.     

STUDIES ON VAPOR-LIQUID AND LIQUID-LIQUIDVAPOR EQUILIBRIA FOR THE TERNARY SYSTEM METHANOL-METHYL METHACRYLATEWATER (Ⅱ) TERNARY SYSTEM

Isothermal P-x data for homogeneous, and P-x'-x" data for partially miscible mixtures for the ternary system methanol-methyl methacrylate-water have been determined at 25, 35, 45, 55 and 60℃. By using a modified UNIQUAC model and binary parameters only, the predicted ternary phase equilibrium data were found to be in good agreement with the experimental results, indicating the adequacy of using binary model parameters in computing vapor-liquid and liquid-liquid-vapor equilibria covering pressures ranging from reduced to atmospheric.     

STUDIES ON VAPOR-LIQUID AND LIQUID-LIQUID-VAPOR EQUILIBRIA FOR THE TERNARY SYSTEM METHANOL-METHYL METHACRYLATEWATER (Ⅰ) THREE BINARY SYSTEMS

Isothermal P-x data tor the binary systems methanol-methyl methacrylate and methanol-water, and isothermal P-x'-x" data for the binary system methyl methacrylate-water have been determined at 25, 35, 45, 55 and 60℃. Based on the maximum likelihood principle, the modified UNIQUAC model pa rameters for these binary systems were obtained by fitting the experimental data. Vapor compositions were then calculated, and the results were compared with literature data.     

亚硝酸甲酯在甲醇溶剂中的亨利常数测定

在合成气制乙二醇这一新工艺中,亚硝酸甲酯的再生起着至关重要的作用,但关于亚硝酸甲酯的基础物性数据很少,如在甲醇中的亨利常数。由于亚硝酸甲酯的相关物性数据的缺乏,不能用已报道的一些方法进行估算,因此在改进的静态法测定汽液平衡装置上,测定了293.15—323.15 K亚硝酸甲酯在甲醇中的亨利系数。结果表明,温度升高,亨利系数增大,且亚硝酸甲酯在甲醇中的溶解量很小。通过对亨利系数与温度的关联得出普遍意义的表达式,为亚硝酸甲酯再生的研究提供参考。     

静态蒸汽总压法研究二氟二氯甲烷-乙醚、乙醚-丙酮二元系的恒温汽液平衡

新研制了带视镜的高压静态平衡器,可以观察平衡系统内相的分布情况及准确测定相体积,测压范围0～10MPa,实验在1/2全浓度范围内可连续进行.用此平衡器测定了二氟二氯甲烷、乙醚、丙酮在常沸点以上的蒸汽压以及二氟二氯甲烷-乙醚、乙醚-丙酮2对二元系的加压汽液平衡,获得了T、p、n_T、z以及V~g的数据.进一步用物料衡算与由T、p、x推算y的方法相结合,计算了平衡相组成x和y.汽相逸度系数用改进的PR状态方程计算.