| 张晓菲,武朝军,刘人铭,李学芳.化学通报,2015,78(3):247-253. |
| 30℃时MgCl2-MgSO4-CH3CH2OH-H2O四元体系液固相平衡的研究 |
| A Study on the liquid-solid phase Equilibrium of Quanternary system MgCl2-MgSO4-CH3CH2OH-H2O at 30℃ |
| 投稿时间：2014-06-27 修订日期：2014-08-14 |
| DOI： |
| 中文关键词: 氯化镁 硫酸镁 乙醇 平衡 |
| 英文关键词:Magnesium chloride, Magnesium sulfate, Ethanol, equilibrium |
| 基金项目: |
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| 中文摘要: |
| 采用等温法，测定了30℃时MgCl2-MgSO4-CH3CH2OH-H2O四元体系及边界三元体系MgCl2-CH3CH2OH-H2O和MgSO4-CH3CH2OH-H2O的相平衡数据，绘制了相图并划分了相应的结晶区。实验结果表明：四元体系MgCl2-MgSO4-CH3CH2OH-H2O随着乙醇-水体积比不同，体系出现了不同的结晶区，随着乙醇含量的增加，MgCl2和MgSO4的溶解度越来越小，不饱和区越来越小，体系中平衡固相的结晶水含量越来越低，说明乙醇具有一定的盐析作用和脱水作用。当乙醇-水体积比为5:5时，是获得镁盐的最佳比例。这为芒硝和白钠镁矾共生矿中镁盐的分离和提纯提供基础的理论数据。 |
| 英文摘要: |
| Using is othermal method, the phase equilibrium for Quanternary system MgCl2-MgSO4-CH3CH2OH-H2O and its boundary systems MgCl2-CH3CH2OH-H2O and MgSO4-CH3CH2OH-H2O at 30℃ were determined. Then, phase diagram is drawn and Divided the corresponding crystallization zone. For the quaternary system of MgCl2-MgSO4-CH3CH2OH-H2O in the alcohol-water system of different volume ratio, the system appear many different crystalline regions. With increasing the ethanol-water volume ratio, the solubility of MgCl2 and MgSO4 become smaller. the unsaturated region becomes smaller.hydrate brings less crystal water, which indicates that ethanol has salting and dehydration. the best proportion of magnesium salt can be gained when the ethanol-water volume ratio of quaternary system is 5:5. this experiment Provide the thermodynamic data of separating and purifing magnesium salt from paragenetic mineral of mirabilite and bloedite . |
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