气相中的稳态分子扩散 (35).pdf

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1、Liquid-liquid extraction and liquid-solid leaching Principles of Chemical Engineering-CDUTtriangle coordinate diagram and lever rulesthe liquid-liquid equilibrium phase diagramthe liquid-liquid equilibrium equation and partition curvethe selection of extractant Principles of Chemical Engineering-CDU

2、Tliquid-liquid equilibrium phase diagramextraction is the separation process of ternary systemoriginal solvent B extractant Striangle coordinate diagramequilateral triangle coordinate diagramequicrural triangle coordinate diagram non-equicrural triangle coordinate diagramthe representation method of

3、 composition in triangle phase diagramsolute APrinciples of Chemical Engineering-CDUTliquid-liquid equilibrium phase diagramD40.0Ax0.60Sx M40.0Ax30.0Bx30.0SxABSthe representation method of triangle coordinate diagramDMPrinciples of Chemical Engineering-CDUTthe relationship of each component-lever ru

4、lesM=MA+MBOjunctionAhandicapBhandicapMAMBMlever rulesABABMOBMOAMOBMABMOAMABliquid-liquid equilibrium phase giagramPrinciples of Chemical Engineering-CDUTthe application of lever rulesABSliquid phase R rkgxA、xS、xBliquid phaseEekgyA、yS、yBermEMRMreAAAAyzzxERRMmeAAAAyxzxliquid phase MmkgzA、zS、zBMRESxBxB

5、ySySzBzAxAyAzPrinciples of Chemical Engineering-CDUTliquid-liquid equilibrium phase diagramTernary system can be divided into the following conditions according to the intersolubility of each component in the process of extractionI systemsystem1.two forms of solubility curveA is completely soluble i

6、n B and S,but B and S are not mutually soluble.A is completely soluble in B and S,while B and S are partially soluble.Ais completely soluble in B.(solubility curve)Principles of Chemical Engineering-CDUTconjugate phasehomogeneous liquid areatwo phase araesolubility curvecritical mixed melting point

7、connecting linesolubility curve(1)-connecting lineA is completely soluble in B.A and S are partially soluble in B and S.Principles of Chemical Engineering-CDUTauxiliary curvesolubility curvethe liquid-liquid equilibrium phase diagramsolubility curve(2)-The auxiliary curve Principles of Chemical Engi

8、neering-CDUTget auxiliary curve from connecting linethe exchange of two solubility curvethe liquid-liquid equilibrium phase diagram Principles of Chemical Engineering-CDUTthe liquid-liquid equilibrium phase diagramget connecting line from auxiliary curve1E2E1R2Rthe exchange of two solubility curvePrinciples of Chemical Engineering-CDUTthe liquid-liquid equilibrium phasediagram(solubility curve)2.Temperaturem has an influence on solubility curvetemperature Tsolubilitytwo phase areaIt is adverse for extraction