추출은 조작조건의 선택에서 증류에서의 조작온도와 마찬가지로 용매의 종류나 양을 달리할 수 있어 다양한 조건하에서 분리조작이 가능하여 상접촉에 의한 분리방법 가운데 대표적인 분리기술로 알려져 있다. 본 연구는 용매추출 공정에서 일반적으로 취급되는 water-1-propanol계가 증류로는 분리가 어려운 공비혼합물을 형성함으로써 1-propanol을 분리하기 위하여 용매를 첨가한 3성분 액-액추출계를 구성하였으며, 용매의 종류에 따른 상분리 거동을 검토하여 평형특성치의 실험적인 분석과 열역학적 관점에서 각 현상들을 이론적으로 고찰하였다. 각 3성분계에서 구해진 용해도곡선과 tie-line 데이터의 건전성을 확인하였으며 평형조성 실험치와 NRTL과 UNIQUAC 모델식의 ...
추출은 조작조건의 선택에서 증류에서의 조작온도와 마찬가지로 용매의 종류나 양을 달리할 수 있어 다양한 조건하에서 분리조작이 가능하여 상접촉에 의한 분리방법 가운데 대표적인 분리기술로 알려져 있다. 본 연구는 용매추출 공정에서 일반적으로 취급되는 water-1-propanol계가 증류로는 분리가 어려운 공비혼합물을 형성함으로써 1-propanol을 분리하기 위하여 용매를 첨가한 3성분 액-액추출계를 구성하였으며, 용매의 종류에 따른 상분리 거동을 검토하여 평형특성치의 실험적인 분석과 열역학적 관점에서 각 현상들을 이론적으로 고찰하였다. 각 3성분계에서 구해진 용해도곡선과 tie-line 데이터의 건전성을 확인하였으며 평형조성 실험치와 NRTL과 UNIQUAC 모델식의 파라미터에 의한 계산치를 비교하였고, 각 3성분계에 대한 분배계수와 선택도를 측정함으로써 용매의 추출성능에 대하여 분석하였다. 4성분계에서는 단순히 계 내에 포함된 관능기의 종류와 수에 의해서만 평형조성을 예측할 수 있는 UNIFAC 모델식으로 적용 가능성을 검토하였다.
추출은 조작조건의 선택에서 증류에서의 조작온도와 마찬가지로 용매의 종류나 양을 달리할 수 있어 다양한 조건하에서 분리조작이 가능하여 상접촉에 의한 분리방법 가운데 대표적인 분리기술로 알려져 있다. 본 연구는 용매추출 공정에서 일반적으로 취급되는 water-1-propanol계가 증류로는 분리가 어려운 공비혼합물을 형성함으로써 1-propanol을 분리하기 위하여 용매를 첨가한 3성분 액-액추출계를 구성하였으며, 용매의 종류에 따른 상분리 거동을 검토하여 평형특성치의 실험적인 분석과 열역학적 관점에서 각 현상들을 이론적으로 고찰하였다. 각 3성분계에서 구해진 용해도곡선과 tie-line 데이터의 건전성을 확인하였으며 평형조성 실험치와 NRTL과 UNIQUAC 모델식의 파라미터에 의한 계산치를 비교하였고, 각 3성분계에 대한 분배계수와 선택도를 측정함으로써 용매의 추출성능에 대하여 분석하였다. 4성분계에서는 단순히 계 내에 포함된 관능기의 종류와 수에 의해서만 평형조성을 예측할 수 있는 UNIFAC 모델식으로 적용 가능성을 검토하였다.
In the design of extraction equipment, it is very important to experimental liquid-liquid equilibria data. Thus, the need for calculating and predicting liquid-liquid equilibria(LLE) compositions has very much increased. The purpose of this study is to determine and describe LLE data for the ternary...
In the design of extraction equipment, it is very important to experimental liquid-liquid equilibria data. Thus, the need for calculating and predicting liquid-liquid equilibria(LLE) compositions has very much increased. The purpose of this study is to determine and describe LLE data for the ternary or quaternary systems of 1-propanol-water at 25℃. We investigated that the selection of the optimum solvent to separate 1-propanol from aqueous solution on each ternary LLE and compared with ternary and quaternary LLE including binary solvent also. In this work, we have obtained the following result. 1. Ternary LLE In order to systematically evalute the effect of functional group in each solvent, we selected a variety of solvents, methyl isobutyl ketons as keton group, ethylacetate and butylacetate as ester group, o-xylene as aromatic compound, n-heptane as hydrocarbone group for ternary liquid-liquid extraction system. 1) The experimental binodal curves and tie-line data for solvent(1)-water(2)-1-propanol(3) were determined and these were shown in Table 8 and Table 9, respectively. The thermodynamc consistency for experimental tie-line data were investigated with several correlation methods and those plots were shown in Fig. 17∼19. 2) The NRTL, UNIQUAC and modified UNIQUAC models were used to correlate the experimental results and to calculate the phase compositions of the ternary systems. 3) In considering the kind of solvent, distribution and selectivity for ternary system solvent(1)-water(2)-1-propanol(2) were increased in order of n-heptane, o-xylene, butylacetate, methyl iso butyl ketone, ethylacetate. Consequently, aromatic compound were more profitable then other solvent groups. 2. Quaternary LLE We studied on the phase equilibria of quaternary liquid-liquid extracion system composed 1-propanol-water-binary solvent. o-xylene-BAc, MIBK-EAc mixture, which have small difference over two phase region, and n-heptane-EAc mixture, which have relativerely larger difference, were used as binary solvents. 1) Binodal curve, tie-line, distribution and selectivity for each quaternary system have been determined in order to investigate the effect of using binary solvent for extracting 1-propanol from aqueous solution. 2) These experimental tie-line data were also compared with the values predicted by UNIFAC model.
In the design of extraction equipment, it is very important to experimental liquid-liquid equilibria data. Thus, the need for calculating and predicting liquid-liquid equilibria(LLE) compositions has very much increased. The purpose of this study is to determine and describe LLE data for the ternary or quaternary systems of 1-propanol-water at 25℃. We investigated that the selection of the optimum solvent to separate 1-propanol from aqueous solution on each ternary LLE and compared with ternary and quaternary LLE including binary solvent also. In this work, we have obtained the following result. 1. Ternary LLE In order to systematically evalute the effect of functional group in each solvent, we selected a variety of solvents, methyl isobutyl ketons as keton group, ethylacetate and butylacetate as ester group, o-xylene as aromatic compound, n-heptane as hydrocarbone group for ternary liquid-liquid extraction system. 1) The experimental binodal curves and tie-line data for solvent(1)-water(2)-1-propanol(3) were determined and these were shown in Table 8 and Table 9, respectively. The thermodynamc consistency for experimental tie-line data were investigated with several correlation methods and those plots were shown in Fig. 17∼19. 2) The NRTL, UNIQUAC and modified UNIQUAC models were used to correlate the experimental results and to calculate the phase compositions of the ternary systems. 3) In considering the kind of solvent, distribution and selectivity for ternary system solvent(1)-water(2)-1-propanol(2) were increased in order of n-heptane, o-xylene, butylacetate, methyl iso butyl ketone, ethylacetate. Consequently, aromatic compound were more profitable then other solvent groups. 2. Quaternary LLE We studied on the phase equilibria of quaternary liquid-liquid extracion system composed 1-propanol-water-binary solvent. o-xylene-BAc, MIBK-EAc mixture, which have small difference over two phase region, and n-heptane-EAc mixture, which have relativerely larger difference, were used as binary solvents. 1) Binodal curve, tie-line, distribution and selectivity for each quaternary system have been determined in order to investigate the effect of using binary solvent for extracting 1-propanol from aqueous solution. 2) These experimental tie-line data were also compared with the values predicted by UNIFAC model.
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