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에멀죤형 액체막에 의한 벤젠-싸이클로헥산 혼합물의 분리
Separation of Benzene-Cyclohexane Mixture by Emulsion-Type Liquid Membrane
HWAHAK KONGHAK, June 1987, 25(3), 209-216(8), NONE
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Abstract
비점차가 작은 벤젠-싸이클로헥산 혼합물의 분리에 있어서 에멀죤형의 액체막을 사용하여 혼합물의 조성, 용매/혼합물 체적비, 계면활성제와 글리세롤의 농도 등이 분리계수에 미치는 영향을 실험연구하였다.
조성의 변화에 따라서는 에멀죤과 용매와의 접촉시간이 10분인 경우 분리계수의 평균치가 5.74로서 증류에 의한 분리보다 훨씬 용이하고, 용매/혼합물 체적비는 4일 때 벤젠의 투과는 최대로 되었으며 벤젠-싸이클로헥산 혼합물중 벤젠의 상대용해도비가 크기 때문에 벤젠의 농도가 70 mol% 까지는 농도가 증가할수록 분리계수는 증가한다.
계면활성제의 농도가 1 wt% 이하에서는 접촉시간이 증가함에 따라 분리계수가 급격히 증가하나, 1 wt% 이상에서는 접촉시간이 증가하여도 분리계수에는 거의 영향을 미치지 못하므로 계면활성제의 농도가 1 wt% 이하에서 가장 효과적이며 막강화제인 글리세롤의 농도는 50 wt%에서 가장 효과적이었다.
조성의 변화에 따라서는 에멀죤과 용매와의 접촉시간이 10분인 경우 분리계수의 평균치가 5.74로서 증류에 의한 분리보다 훨씬 용이하고, 용매/혼합물 체적비는 4일 때 벤젠의 투과는 최대로 되었으며 벤젠-싸이클로헥산 혼합물중 벤젠의 상대용해도비가 크기 때문에 벤젠의 농도가 70 mol% 까지는 농도가 증가할수록 분리계수는 증가한다.
계면활성제의 농도가 1 wt% 이하에서는 접촉시간이 증가함에 따라 분리계수가 급격히 증가하나, 1 wt% 이상에서는 접촉시간이 증가하여도 분리계수에는 거의 영향을 미치지 못하므로 계면활성제의 농도가 1 wt% 이하에서 가장 효과적이며 막강화제인 글리세롤의 농도는 50 wt%에서 가장 효과적이었다.
In the separation by emulsion-type liquid membrane of benzene-cyclohexane mixture（the difference between the boiling points of the two components is small）, the effects of feed composition, the volume ratio of solvent to feed, surfactant concentration and glycerol concentration on the separation factor have been studied.
As the averages separation factor of 5.74 for this system at the contact time of 10 minutes for various feed composition, this technique has been found much more effective than the distillation method. Since the relative solubility ratio of benzene in benzene-cyclohexane mixture is greater than that of cyclohexane, the separation factor has been found to increase as the concentration of benzene inceases up to 70 mol per cent. It has also been found that the permeation of benzene has reached the maximum value when the volume ratio of solvent to feed is equal to four.
The separation has been most effective at the concentration of the surfactant below one weight per cent in which the separation factor increases rapidly with increasing contact time, while the contact time has nearly no effect on the separation factor at the surfactant concentration above one weight per cent. The separation factor has also been effective at the glycerol concentration of 50 weight per cent.
As the averages separation factor of 5.74 for this system at the contact time of 10 minutes for various feed composition, this technique has been found much more effective than the distillation method. Since the relative solubility ratio of benzene in benzene-cyclohexane mixture is greater than that of cyclohexane, the separation factor has been found to increase as the concentration of benzene inceases up to 70 mol per cent. It has also been found that the permeation of benzene has reached the maximum value when the volume ratio of solvent to feed is equal to four.
The separation has been most effective at the concentration of the surfactant below one weight per cent in which the separation factor increases rapidly with increasing contact time, while the contact time has nearly no effect on the separation factor at the surfactant concentration above one weight per cent. The separation factor has also been effective at the glycerol concentration of 50 weight per cent.
