固体-液体相平衡的Pb2+,Ca2+,Mg2+//Cl-H2O四度系统及其子系统在303.2K
Xiangyang Liu1, Yanrui Hou1, Ruoyu Yang1
1School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China.
ACS omega
|July 22, 2024
概括
这项研究研究了三元和四元化水系统中的相位平衡,涉及,和离子. 结果揭示了不同的晶体区域和密度行为,这对于理解盐溶性和结晶过程至关重要.
科学领域:
- 物理化学 物理化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 了解固体-液体相平衡对于预测和控制多元件系统中的结晶过程至关重要.
- 含有双价金属离子 (如,和) 的水系统的行为与各种工业应用有关,包括化学加工和材料合成.
研究的目的:
- 为了研究三元系统 (Pb2+,Ca2+//Cl--H2O,Pb2+,Mg2+//Cl--H2O,Ca2+,Mg2+//Cl--H2O) 在303.2K和大气压下的固态液态相平衡.
- 要确定四分制系统 (Pb2+,Mg2+,Ca2+/Cl-H2O) 的固体相平衡.
- 为这些系统构建稳定相位图和密度组成图.
主要方法:
- 用同热溶解平衡方法研究在303.2 K的恒温下相位平衡.
- 阶段图和密度组成图是基于实验数据构建的.
- 对三元和四元系统进行了结晶区域和不变点的分析.
主要成果:
- 三元系统Pb2+,Ca2+//Cl-H2O表现出一个三元不变点,两个溶解度曲线和四个晶体区域.
- 三元系统Pb2+,Mg2+//Cl-H2O和Ca2+,Mg2+//Cl-H2O,每一个包含两个三元不变点,三个溶解度曲线和六个晶体区域.
- 四元制Pb2+,Mg2+,Ca2+//Cl-H2O显示了两个不变点,五个同热溶解曲线和五个晶体区域,其中PbCl2具有最大的相对面积.
结论:
- 平衡溶液的密度通常随着CaCl2的质量分数的增加而增加,在不变点达到最大值.
- 确定相图提供了对这些多元组分化物系统的结晶行为的全面了解.
- 这些发现对于优化涉及这些盐的分离和净化过程至关重要.
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