恒沸物

二元恒沸物系若干特征的计算机预报

Computerized prediction of properties of binary azeotrope systems

这类化合物受热时形成恒沸物，该混合物的沸腾温度低于每种单独液体的沸腾温度。

These compounds , when heated together , form an azeotrope , in which the boiling temperature of the mixture is lower than the boiling temperature of each separate liquid .

关于二组分恒沸物系自由度问题的讨论

Discussion on the Degree of Freedom of Two-component Azeotropic Systems

实际上所有液体混合并受热时，都表现出恒沸物的特性。

Virtually all liquids , when mixed and heated , will display azeotropic behaviour .

加盐萃取精馏分离甲乙酮水恒沸物的研究

Study on the Separation of Azeotrope of Methyl Ethyl Ketone-water System Using Extractive Distillation with Salt

采用萃取精馏法对甲醇-碳酸二甲酯二元恒沸物进行了分离；

The separation of azeotrope formed by methanol and DMC has been investigated by extractive distillation .

运用上述公式和特殊限制条件，同样得出二组分恒沸物系只有一个自由度的结论。

By application of the formula indicated and special limiting condition , the conclusion of only one degree of freedom with two-component azeotropic system can be obtained .

结果表明乙二醇与醋酸钾的混合物是分离甲乙酮水二元恒沸物的理想萃取剂。

The separation of azeotrope of methyl ethyl ketone water has been investigated by extractive distillation using the mixture of ethylene glycol and potassium acetate as an extractant .

渗透蒸发膜分离过程用于均相液体混合物的分离时，对采用传统手段难以处理的恒沸物、近沸点物和共沸物等体系具有特别的优势。

As one of the newest developments on membrane separation , pervaporation is a promising technique for the separation of liquid mixtures , such as azeotropic and isomeric mixtures , which are difficult or impossible to separate by conventional methods .

乙醇和乙酸合成乙酸乙酯的反应是可逆反应，乙酸乙酯、乙醇和水会形成二元或三元恒沸物，所以获得高纯度的乙酸乙酯非常困难。

The esterification reaction between ethanol and ethanoic acid to ethyl acetate is reversible . Ethyl acetate , ethanol and water can form binary or ternary azeotropes . Therefore , it is very difficult to obtain ethyl acetate of high purity .

恒沸精馏是分离近沸点与恒沸物系的重要手段，挟带剂量是影响恒沸精馏分离性质的重要因素。

Azeotropic distillation technique is an important way to separat close-boiling or azeotropic systems , in which the flow of entrainer is an important factor to affect separation property .

酒精恒沸蒸馏是在有水酒精中加入第三种物质，如苯、戊烷、环己烷等，使水与添加物形成另一种恒沸物，并先行挥发，而得到无水酒精。

Constant boiling distillation of alcohol referred the addition of the third substance into watered alcohol such as benzene , pen-tane and cyclohexane etc. to form water and the additive into another constant boiling substance to produce absolute alcohol through advanced volatilization of such formed substance .