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정태수,박주온 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.4
벤젠과 싸이클로헥산의 혼합물을 액체막에 의하여 분리함에 있어서 계면활성제의 종류와 농도, 접촉온도가 투과율, 분리계수 및 막의 안정성에 미치는 영향을 분석하였다. 음이온 계면활성제를 사용한 경우 그 농도와 접촉온도가 증가함에 따라 두 성분의 투과율은 증가하였으나 비이온 계면활성제의 경우에는 일관성있는 경향을 보여주지 않았다. 비이온 계면활성제보다 음이온 계면활성제를 사용했을 때 더 높은 투과율과 분리 계수를 얻을 수 있다. 사용한 모든 계면활성제의 경우 접촉온도가 상승함에 따라 막파괴율은 증가하였다. In the separation of a mixture of benzene and cyclohexane by liquid surfactant membrane, investigated was the effect of surfactants and their concentration on the permeability, separation factor and membrane stability for different contact temperatures. In the case of anionic surfactants the fraction of permeation increased as their concentration and contact temperature increased, however, no consistent trend was observed in the case of nonionic surfactants. Higher permeability and separability were achieved with anionic surfactants than with nonionic ones. For all the surfactants used percentage of membrane breakup increased as the contact temperature increased.
에타놀-물 共沸物의 蒸溜에 있어서 Entrainer가 미치는 影響
鄭泰秀,李黃熙 成均館大學校 科學技術硏究所 1986 論文集 Vol.37 No.1
Experiment on distillation of azeotropic mixture of ethanol and water was carried out in a packed tower with addition of trichloroethylene and n hexane as entrainer as well as of CO_2 gas. Effectiveness of the two entrainers and the effect of CO_2 gas flow rate in the separation of ethanol were studied. The concentration of ethanol in distillation product increased with increasing ratio of entrainer to feed for both trichlorethylene and n-hexane. When n-hexane was used as an entrainer, the concentration of ethanol in the top product was higher than that which could be obtained without using n-hexane in the range of the entrainer/feed ratio of 1.28-1.67 and 1.63-1.67 for 15 and 25 mole % ethanol in the feed, respectively. The rate of distillation production increased with the flow rate of CO_2 gas. With the increasing flow rate of CO_2 gas, the concentration of ethanol in the top product increased at the entrainer flow rate of 333m1/ hr; decreased at the entrainer flow rate of 100ml/hr; and increased initially and then decreased at the entrainer flow rate of 166.7m1/hr. When CO_2 gas was not added, trichloroethylene was more effective than m-hexane at the entrainerlfeed ratio of 0.5, 0.67, 0.83 while n-hexane was more effective than trichloroethylene at the entrainer/feed ratio of 1.17 and 1.67. When CO_2 gas was added at the flow rate of 0.5, 1.0, 1.5, 2.0 l/min and the entrainer/feed ratio was 0.5. 0.83, and 1.67. trichlororoethylene was more effective than n-hexane only at the CO_2 flow rate of 0.5 l/min and the entrainer/feed ratio of 0.5 while n-hexane was more effective than trichloroethylene at all other conditions.