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Study On the Equilibrium Solubility of Cesium Chloride-Fatty Alcohol （ROH; R=CH3-, C2H5-, C3H7-）-Water Ternary System and its Phase Relationship

Author: MengMei
Tutor: GaoShiYang
School: Shaanxi Normal University
Course: Analytical Chemistry
Keywords: CsCl Alcohol Ternary system Solubility Correlation coefficient
CLC: O642.4
Type: Master's thesis
Year: 2002
Downloads: 61
Quote: 0
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Abstract


This paper studies the use of low-temperature thermostat CsCl-HCl-H 2 O ternary system and -24 ℃ -15 ℃ equilibrium solubility relationships found in the CsCl-HCl-H 2 O ternary system, with the hydrogen chloride gas into the increased volume, the system had reached the desired degree of saturation decreases the amount of cesium chloride, and cesium chloride precipitated the system the amount of solids will gradually increase. Therefore, the temperature effect can be used at lower temperatures, the system was more cesium chloride precipitated solid was purified by cesium chloride to improve product yield and purity. In this paper, self-designed semi-micro extraction equilibrium and balance device and online sampling technique to study the cesium chloride an alcohol (ROH; R = CH 3 -, C 2 H 5 -, C 3 H 7 -) - water ternary system under multi-temperature equilibrium solubility and correlation coefficient. Found CsCl-CH 3 OH-H 2 O ternary system we studied in the temperature range, methanol and water are not delaminate, that only two-phase system : liquid and solid phases. In CsCl-C 2 H 5 OH-H 2 O ternary system, 20 ℃, the ethanol and water stratification does not occur, And at 30 ℃, C 2 H 5 OH: H 2 O = 1:1 (ratio of text are alcohol-water volume ratio ) has appeared in a sample stratification. Clearly divided into three-phase system: the alcohol phase (light phase), the aqueous phase (heavy phase) and solid phase. At 40 ℃, C 2 H 5 OH: H 2 O = 4:6,5:5,6:4 and 7:3 stratified sample occurred while others failed to appear proportional sample stratification. At 50 ℃, C 2 H 5 OH: H 2 0 = 3:7,4:6,5:5,6:4 and the occurrence of a stratified sample of 7:3, more than 40 ℃, the range increases stratification, 60 ℃ when, CsCl-C 2 H 5 OH-H 2 O ternary system to stratification of the sample and at 50 ℃ as much. From the above results can be seen in CsCl-C 2 H 5 OH-H 2 O ternary system, as the temperature rise high, layered range increases when the temperature rises to a certain time, the range of stable stratification, no change with temperature. In CsCl-C 3 H 7 OH-H 2 O ternary system, 20 ℃ and 40 ℃, regardless of alcohol and water to What proportion of mixed systems propanol - water mixed solvent occurred stratification. From the three alcohol cesium chloride - water mixed solvent system ternary phase diagram to determine the equilibrium solid phase consisting of anhydrous cesium chloride. In addition, the CsCl-C 2 H 5 OH-H 2 O ternary system at some temperature stratification occurs when, through the gradual approximation Experimental methods found CsCl-C 2 H 5 OH-H 2 O ternary system the critical temperature stratification: 29.50 ℃. On CsCl-C 2 H 5 OH-H 2 O ternary system is not saturated solution equilibrium solubility of 40 ℃ were studied, using mapping Method to find the hierarchical composition of the critical point, cesium chloride: 38.00% 26.50% ethanol. Stratification of these systems produce the mechanism made tentative explanation.

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical thermodynamics, thermochemistry, thermodynamic equilibrium > Thermodynamic equilibrium
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