恒沸混合物，即恒沸溶液，是指两组分或多组分的液体混合物，在恒定压力下沸腾时，其组分与沸点均保持不变。这实际是表明，此时沸腾产生的蒸汽与液体本身有着完全相同的组成。共沸物是不可能通过常规的蒸馏或分馏手段加以分离的。
... 亨利定律henry law 恒沸混合物constant boiling mixture 恒容摩尔热容molar heat capacity at constant volume ...
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渗透汽化分离是一种高效、节能的分离技术，特别适用于近沸及恒沸混合物的分离。
Pervaporation, as one of high efficient and economic membrane separation methods, is capable of separating azeotropic and near-boiling point mixtures.
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.
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.
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