HWAHAK KONGHAK, Vol.12, No.4, 243-250, August, 1974
i-Propyl Alcohol-Water-Salt계의 액·액평형 -염효과에 의한 공비혼합물의 분리에 관한 연구(II)
The Liquid-Liquid Equilibria for i-Propyl Alcohol-Water-Salt Systems
초록
i-Propyl alcohol-water 공비혼합물의 액·액평형에 미치는 염효과를 30℃, 대기압하에서 측정하였다. 예비실험으로 K2CO3, Na2CO3, KCl, NaCl 등의 염을 각각 i-propyl alcohol-water 균일상혼합물에 가할 경우 이들 액상이 2 액상으로 분리하며, 특히 K2CO3, Na2CO3에 있어서는 그 상층액상의 조성이 공비점을 넘어서는 결과를 얻었다.
따라서 이들 염（K2CO3, Na2CO3 KCl, NaCl）을 포함한 i-propyl-alcohol-water 3성분계의 상호용해도 곡선과 tie line data를 30℃, 대기압하에서 측정하였다.
이들 tie line data의 상관성을 전보1）와 같이 고찰하고 plaitpoint도 추정하였다.
염의 농도와 종류에 따른 염효과를 염의 분배율과 water에 대한 염의 선택도를 통하여 고찰한 결과 포화상태에서 KCl, NaCl, Na2CO3, K2CO3순으로 분리효과가 좋았다.
전보1）와 본 실험을 통하여 공비혼합물의 효과적인 분리를 위한 추출-증류연속 조작의 개발이 가능할 것이라는 결론을 얻었다.
따라서 이들 염（K2CO3, Na2CO3 KCl, NaCl）을 포함한 i-propyl-alcohol-water 3성분계의 상호용해도 곡선과 tie line data를 30℃, 대기압하에서 측정하였다.
이들 tie line data의 상관성을 전보1）와 같이 고찰하고 plaitpoint도 추정하였다.
염의 농도와 종류에 따른 염효과를 염의 분배율과 water에 대한 염의 선택도를 통하여 고찰한 결과 포화상태에서 KCl, NaCl, Na2CO3, K2CO3순으로 분리효과가 좋았다.
전보1）와 본 실험을 통하여 공비혼합물의 효과적인 분리를 위한 추출-증류연속 조작의 개발이 가능할 것이라는 결론을 얻었다.
The salt effect in liquid-liquid equilibrium for i-propyl alcohol-water azeotropic mixture was studied at 30 ℃ under atmospheric pressure.
i-propyl alcohol-water homogeneous mixture was separated into two layer by addition of salt such as K2CO3, Na2CO3, KCl, etc., and especially for K2CO3 and Na2CO3 the composition of upper layer was moved to beyond the azeotropic composition.
Meanwhile, mutual solubility and tie line data were determined experimentally for the ternary systems of i-propyl alcohol-water-salt （K2CO3, Na2CO3, KCl, NaCl respectively） at 30 ℃ under atmospheric pressure.
The tie line data were successfully correlated by each of five different methods-Hirata, Campbell, Hand, Treybal and Iguchi as in the previous work, and plait points of these ternary systems were located by the methods of Hand-Treybal and Iguchi.
From the results of this work and previous one, it is concluded that the development of a new effective extraction-distillation continuous process for separating azeotropic mixtures is possible.
i-propyl alcohol-water homogeneous mixture was separated into two layer by addition of salt such as K2CO3, Na2CO3, KCl, etc., and especially for K2CO3 and Na2CO3 the composition of upper layer was moved to beyond the azeotropic composition.
Meanwhile, mutual solubility and tie line data were determined experimentally for the ternary systems of i-propyl alcohol-water-salt （K2CO3, Na2CO3, KCl, NaCl respectively） at 30 ℃ under atmospheric pressure.
The tie line data were successfully correlated by each of five different methods-Hirata, Campbell, Hand, Treybal and Iguchi as in the previous work, and plait points of these ternary systems were located by the methods of Hand-Treybal and Iguchi.
From the results of this work and previous one, it is concluded that the development of a new effective extraction-distillation continuous process for separating azeotropic mixtures is possible.