相对挥发度

含水DMF溶剂对苯和噻吩相对挥发度的影响

Relative Volatility of Benzene and Thiophene in Aqueous DMF Solvent

萃取剂B使HFPO对HFP的相对挥发度达到2.204；

The solvent B alters the relative volatility of HFPO vs HFP to 2.204 ;

文章采用改进的Rose气液平衡釜，测定了几种常见的盐对异戊醇和旋光戊醇体系的相对挥发度的影响。

The salt effect of the common salts in the active amyl-isoamyl alcohol system is researched by using the improved Rose equilibrium still .

基于改进的UNIFAC模型，以MATLAB语言开发了萃取精馏过程相对挥发度的计算程序。

Based on modified UNIFAC model and MATLAB , a program has been developed for calculating the relative volatility of extractive distillation .

此外，利用aspenplus对三组分共沸系统中跨越精馏单元边界的分离进行了模拟，模拟结果与用相对挥发度顺序图分析的结果一致。

Furthermore , the splits of ternary azeotropic system were simulated by using Aspen Plus , and the results are in good agreement with that of the analysis .

试验研究表明，溶剂加盐能够提高C4组份之间的相对挥发度，且比一般有机溶剂效果明显；

The results showed that solvents with addition of salt could improve the relative volatility of C 4 more apparently than other organic solvents added to the basic solvent .

以C4为例利用无限稀释相对挥发度的试验测定结果，研究加盐萃取精馏分离非极性体系的影响规律。

The influence on separating non polar systems of C 4 fractions by extractive distillation with addition of salt in terms of relative volatility at infinite dilution was studied .

该方法并不要求相对挥发度为常数，并且能准确计算顶浓，克服了通常所采用的Underwood公式法的缺陷，为多元分批精馏的简捷设计奠定了基础。

Thus , the method has overcome the shortcomings of Underwood formula , and provides a sound basis for short-cut design of multicomponent batch distillation column .

含盐体系中相对挥发度和盐浓度的关联

The Correlation between Relative Volatility and Salt Concentration in Salt-containing System

原料组成对相对挥发度的影响较弱。

The effect of raw material composition on relative volatility is weak .

相对挥发度平均值的近似计算

Approximation Calculation of the Average Value of Relative Volatility

精馏计算中相对挥发度α的选择

Choosing relative volatility α in calculation of distillation

在多元物系间歇精馏过程中，拟夹紧区的宽度随回流比和相对挥发度的大小而改变；

The width of the pseudo-pinch point zone was affected by reflux ratio and relative volatility .

本文提出以相对挥发度、相对分子摩尔质量、熔点、沸点、共沸和稳定判断等为筛选指标进行分子设计；

The screening indexes of extractant include relative volatility , molecular weight , freezing point , boiling point , azeotrope judgement and molecule stability .

因其与其它组分间的相对挥发度很小，且本身又是热敏性物料，故分离难度大，能耗高。

Because of its low relative volatility with other components in system and its heat sensitivity , the separation difficulties and energy consumption are increased .

汽液平衡的测定和关联结果表明，本文所选的复合萃取溶剂均能显著提高乙醇与水、丙醇与水、异丙醇与水的相对挥发度。

As shown as the experimental and correlation results , all of the mixed solvents proposed in this thesis could increase the relative volatilities obviously .

由于苯和环己烷的相对挥发度非常接近，利用传统分离方法（如萃取精馏或共沸精馏）分离苯-环己烷混合物的分离效率较低。

Efficiency of conventional separation , namely azeotropic distillation or extractive distillation , was relatively low due to very close relative volatility of benzene and cyclohexane .

结果表明，加入合适的萃取剂可有效地提高旋光性戊醇对异戊醇的相对挥发度，减少分离所需的理论板数。

The results showed that addition of appropriate extracting solvent could increase the relative volatility of active amyl alcohol and decrease the number of theoretical plates .

用这些萃取剂可将CFC-115/HFC-125体系的相对挥发度提高至2.7以上。

These extractive agents improve the relative volatility of CFC-115 / HFC-125 to above 2.7.High purity HFC-125 can be obtained from the extracting solution with simple distillation .

将相对挥发度作为萃取剂选择的重要依据，并结合其它影响因素，首次提出水是乙酸乙酯和乙醇分离的有效溶剂，甘油是乙酸乙酯和水分离的有效溶剂。

Combined with other influencing factors , water was selected as extractive agent for ethyl acetate / ethanol system and glycerol for ethyl acetate / water system .

根据定标粒子理论基本方程的建立过程，导出了萃取精馏分离过程盐效应常数与加盐前后无限稀释相对挥发度之间的关系。

Analysis of the fundamental equations of scaled particle theory provides the relationship between the salting coefficient and the relative volatilities at infinite dilution with and without salt .

采用普通精馏无法分离苯和环己烷，因为苯和环己烷在全组成范围内相对挥发度接近，沸点也接近。

Separation of benzene and cyclohexane is difficult by a conventional distillation process because these components form close boiling point mixtures at the entire range of their compositions .

通过汽液平衡釜测定有所选溶剂存在时，各组分问的相对挥发度，确定乙二醇为分离二乙氧基甲烷一乙醇的良好溶剂；

The relative volatilities between different compositions are determined in select - ed solvents by vapor-liquid equilibrium kettle and glycol is approved an appropriate extractive solvent for diethoxymethane-ethanol .

通过气相色谱法测定水-醋酸体系在较优萃取剂中的无限稀释活度系数，将计算得到的无限稀释相对挥发度与本文预测值相比较，验证设计方法的准确性。

The accuracy of the method was verified by determining the infinite dilution activity coefficient of the water + acetic acid system in the superior extractants by gas-liquid chromatography method .

由于苯与环己烷的相对挥发度在全组成范围内均很低且形成共沸物，高效地分离苯-环己烷成为学术界研究的热点课题。

For both the formation of azeotropic and the low relative volatility ( volume fraction of components from 0 to 100 % ) of the mixture , the efficient separation of benzene and cyclohexane has become academic research topic .

实验得出，乙醇水体系的相对挥发度随溶剂比的增加而显著增大，水乙二醇过渡馏分段持续时间很短，在该段时间会出现塔顶温度急剧跃升的现象；

The results showed that the relative volatility of ethanol-water azeotropic mixture increased obviously as solvent ratio increased and the slop cut of water-glycol lasted a very short time during which the temperature at the top of the column rose sharply .

精制苯的纯度为99.9%据报道，苯与正庚烷之间的相对挥发度仅为0.962。而且，相对挥发度随着杂质含量的减少而减少，因此一般的精馏方法难以将苯中的烷烃完全去除。

It is reported that the relative volatility is only 0.962 between benzene and n-heptane and relative volatility reduce too with reduction of impurity content , so it is difficult to separate at all alkane hydrocarbon in benzene general rectification method .

实验表明，原料浓度、塔的理论板数、精馏时间、体系的相对挥发度都会影响优化操作的优化效果，而这些因素的影响是因为使塔顶储罐内发生了严重的返混。

The experimental results show that the concentration of feedstock , number of theoretic tray , distillation time , and relative volatility of the system all affect the results because of severe back-mixing caused by them in tanks of the tower 's top .

常压下汽液平衡的实验结果表明溶剂加盐能够有效地提高醇对水的相对挥发度，在恒沸点处3种醇水体系的相对挥发度分别是256、268、267。

The experimental results of vapour liquid equilibrium at normal atmosphere showed that the relative volatilities of alcohol to water which were 2 56,2 68 and 2 67 respectively for the three systems at azeotropic point were effectively raised by solvent with salts .

在化工生产中经常会遇到欲分离组分之间的相对挥发度接近1或形成共沸物的系统，遇到这种情况，需要采用特殊的精馏方法才能加以分离，共沸精馏就是其中的方法之一。

It can be frequently met in the chemical production that the components to be separated have a relative humility which approaches 1 or form a azeotropic system in such case a special distillation is needed to perform the separation . Azeotropic distillation is one of them .