Potential Correlation between Spontaneous Emulsification and the Plait Point in the System Water/Benzene/Ethanol: A Phase Diagram Approach

The separation of phases after the stability composition at a plait point is exceeded has significant effect on the reactions during spontaneous emulsification, but experimental efforts to obtain accurate information are extremely difficult, because even the smallest scattering of the numbers has a large effect on the result. In the present contribution a model system was applied that closely mirrored experimental values and the mass ratio of the two phases could be calculated with high accuracy. Extrapolation of the ratio between phase masses towards the critical composition showed the two phase masses each close to 0.5, while a composition with a miniscule difference from this composition extrapolated to 1.0. The results showed spontaneous emulsification between solutions at the plait point and water to consist of two processes;an initial extremely fast reaction and a slower process between the aqueous phase formed in the primary emulsification and water.

烷烃-芳烃-N-甲酰吗啉体系液-液平衡研究

用液 液平衡釜测定了常压和 5 8 8℃下正庚烷 苯 N 甲酰吗啉 (NFM )、甲基环己烷 苯 NFM、正庚烷 甲苯 NFM和甲基环己烷 甲苯 NFM 4组三元体系的液 液平衡数据。用NRTL和UNIQUAC模型进行了关联 ,求得了它们的褶点 ,并对NFM溶剂存在下烷烃相对于芳烃的选择性进行了比较。

二甲基甲酰胺-苯-正庚烷三元体系的液液平衡

本文采用改进的液液平衡釜,在常压下测定了293.2 K和298.2 K时的二甲基甲酰胺-苯-正庚烷两套三元体系的液液平衡数据,用NRTL和UNIQUAC两种模型关联了298.2K的液液平衡数据,结果令人满意。通过作图法所得褶点与由模型求得的数据相当一致。

含N-甲酰吗啉三组分物系等温液液平衡

用液液平衡釜测定了常压和 40 1℃下正庚烷 -苯 -N -甲酰吗啉 (NFM )、正庚烷 -甲苯 -NFM、甲基环己烷 -苯 -NFM、甲基环己烷 -甲苯 -NFM、环己烷 -苯 -NFM和环己烷 -甲苯 -NFM等 6组三组分物系的液液平衡数据。用NRTL和UNIQUAC模型进行关联 ,求得各三组分体系的褶点数据 ,并对NFM溶剂存在下 3种烷烃和苯。

烷烃-芳烃-N-甲酰吗啉体系液液平衡

用液液平衡釜测定了等温下正庚烷苯ＮＦＭ、甲基环己烷苯ＮＦＭ、正庚烷甲苯ＮＦＭ和甲基环己烷甲苯ＮＦＭ等４组三元体系的液液平衡数据，用ＮＲＴＬ和ＵＮＩＱＵＡＣ模型进行了关联，求得各三元体系的褶点数据，并对ＮＦＭ溶剂存在下烷烃和芳烃的选择性进行了比较。

无限互溶的水——非电解质体系的盐效应

本文经过对Setschenow的盐效应公式1g(S°/S)=KC_s的分析及对文献数据的处理,计算得出:该公式亦适用于无限互溶的水——非电解质体系。并得出了一些体系的盐效应常数。对于用逸度概念表达的盐效应公式1g(f/f°)=k_sC_s与前者的异同本文进行了讨论,指出了后者在应用中所受到的限制及其原因。