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MTBE+Methanol 혼합계의 등온 기액평형에 미치는 염효과
Salt Effect on the Isothermal Vapor-Liquid Equilbrium of MTBE+Methanol System
HWAHAK KONGHAK, August 1999, 37(4), 563-567(5), NONE
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Abstract
Methyl tert-butyl ether(MTBE)+methanol 혼합계의 등온 기액평형에 대한 염효과(salt effect)를 298.15K, 308.15K 그리고 323.15K에서 headspace gas chromatography(H.S.G.C)를 이용하여 측정하였다. LiCl, NaCl, KCl, LiBr, KBr 등의 염에 의한 MTBE+methanol 혼합계의 기액평형에 미치는 염효과 측정 결과 LiCl과 LiBr에 의한 공비점 이동 효과를 확인하였는데, 사용된 염들이 MTBE에는 거의 용해되지 않기 때문에 MTBE가 풍부한 영역에서는 적은 농도의 염이 포함되는 경우에도 좋은 효과를 나타내었다. 특히 298.15K와 308.15K의 온도에서 액상에 LiBr이 포함되어 있을 때 공비점이 완전히 제거되는 효과를 보였다.
Salt effects on vapor-liquid equilibrium at 298.15K, 308.15K and 323.15K were measured for the methyl tertbutyl ether(MTBE)+methanol system with salts(LiCl, NaCl, KCl, LiBr and KBr) by headspace gas chromatography(H.S.G.C). The azeotrope of MTBE+methanol system was remarkably shifted with LiBr and LiCl. Since salts are nearly insoluble in MTBE, salting-out effect was satisfied even though in the case of relatively very low salt concentration in MTBE-rich region. Especially at 298.15K and 308.15K, the azeotropes were eliminated completely when liquid phase was saturated with LiBr.
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References
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Ohe S, Phys. Sci. Data, 43, 39 (1991)
Ohe S, Yokoyama K, Nakamura S, J. Chem. Eng. Data, 16, 70 (1971)
Velacso E, Cocero MJ, Mato F, J. Chem. Eng. Data, 35, 21 (1990)
Yan WD, Rose C, Gmehling J, J. Chem. Eng. Data, 42(3), 603 (1997)
Oh JH, Park SJ, J. Chem. Eng. Data, 42(3), 517 (1997)
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