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HWAHAK KONGHAK,
Vol.31, No.6, 759-766, 1993
Vol.31, No.6, 759-766, 1993
물-비이온성 계면활성제의 액액평형과 이를 이용한 o-Chlorophenol의 추출
Liquid-liquid Equilibria of Water-nonionic Surfactant and Extraction of o-Chlorophenol Using Liquid Coacervate
비이온성 계면활성제인 Triton X-100과 물의 이성분계 액액평형 데이터를 압력 1atm, 5,10과 15MPa에서 측정하였다. 이 이성분계의 LCST는 전 압력에서 약 66℃로 나타났다. 또한 o-chlorophenol을 첨가하여 삼성분계의 액액평형을 측정한 결과 o-chlorophenol이 계면활성제가 과량으로 포함된 코아세르베이트상에 선택적으로 농축 되어 분배계수가 110까지 되었다. Brij30, C6E2, C4E1 수용액에서도 유사한 경향을 보였으며 o-chlorophenol의 분배계수 최대치는 각각 200, 200, 290이었다. 비이온성 계면활성제를 포함하는 수용액에서 공해유기물질의 분배계수는 압력이 증가함에 따라 감소하며, 온도가 증가함에 따라 증가하는 일반적인 경향을 나타내었다. Triton X-100과 물의 이성분계 액액평형 실험치를 Flory-Huggins식으로부터 계산된 에측치와 비교하였고, 이 식에 내재된 interaction energy parameter, χ는 두 개의 매개변수를 사용하여 온도의 함수로 나타내었다.
Liquid-liquid equilibria(LLE) was measured at pressures of 1atm, 5, 10 and 15 MPa for the binary system of water and Triton X-100, which is known as a nonionic biological surfactant. The LCST of this binary system was found to be about 66℃ at all pressure investigated in this study. Tertiary LLE were also measured with addition of o-chlorophenol. Considerable amount of o-chlorophenol was selectively concentrated in the coacervate phase having nonionic surfactant in large excess. The partition ratio between two phases for this tertiary system increased up to 110. The Brij30, C6E2 and C4E1 aqueous solutions showed similiar trends as an Triton X-100 aqueous solution and the corresponding partition ratios were 200, 200 and 290, respectively. The experimental LLE data of the Triton X-100 and water binary system were compared with the predicted values calculated from the Flory-Huggins equation. The interaction energy parameter, chi
existing in the Flory-Huggins equation was experessed as a function of temperature using two adjustable parameters.
existing in the Flory-Huggins equation was experessed as a function of temperature using two adjustable parameters.
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