共沸点

三元系共沸点的测定及预测

Measurement and Prediction of Ternary Azeotropic Point

实验表明：[EMIM]+[BF4]-可以消除乙醇-水体系的共沸点，可以作为萃取精馏分离乙醇-水体系的溶剂。

The experiments proved that [ EMIM ] + [ BF4 ] - could withdraw the azeotropic point of ethanol-water system and could be used as the extractive distillation solvent for the separation of ethanol and water .

UNIFAC基团贡献法预测加压下的二元共沸点

Prediction of binary azeotrope at superatmospheric pressures by UNIFAC method

利用四氢呋喃（THF）溶液的共沸点随压力改变的特性，提出加压塔-常压塔双塔提纯工艺。

The azeotropic temperature of tetrahydrofuran ( THF ) and water changes with the pressure , based on this characteristic a purification process of pressurized column and atmospheric column was established .

苯－正庚烷－乙醇三元体系加压共沸点的测定与预测

Determination of Ternary Azeotropes of Benzene Heptane Ethanol at Superatmospheric Pressures

一旦到了共沸点，我就被困住了。

And once I get there , I 'm stuck .

使用有机溶剂时，反应温度与共沸点有关。

Reaction temperature is determined by co-boiling point while using organic solvent .

当甲醇浓度大于0.615摩尔分率时，乙醇和水之间的共沸点完全消失。

The azeotropic behavior completely disappears when the methanol content in the mixtures is larger than 0.615 ( mol fraction ) .

但是乙醇/水溶液浓度在95.57wt%存在共沸点，传统的方法制取无水乙醇产率低、生产成本高，而且容易造成环境污染。

But azeotropic composition of aqueous ethanol solution is 95.57wt % , traditional methods of producing anhydrous ethanol spend too much energy .

随着新型混合工质的不断提出，建立准确判定和预测混合工质共沸点的方法具有重要价值。

A series of working fluids were judged for azeotropy , for which the azeotropic points were predicted and compared with the literature value .

根据载液是否为萃取剂、是否为共沸体系或沸点相近体系将吸附蒸馏过程划分为4种情况。

The application of adsorption-distillation process can be divided into four cases according to the natures of the adsorbent carrier and the separated system .

由于二乙氧基甲烷-乙醇-水体系形成共沸物且共沸点接近，不能用普通精馏的方法分离，本文提出采用萃取精馏分离法。

The extractive distillation separation is proposed for diethoxymethane-ethanol-water system for there being a common boiling point and a close boiling temperature so it is difficult separated by usual distillation .