四元体系Li+，K+//CO32-，SO42- - H2O 273K时介稳相平衡

Study on Metastable Equilibria in the Quaternary System Li+，K+//CO32-，SO42-- H2O at 273 K

作者：桑世华(成都理工大学材料与化学化工学院;矿产资源化学四川省高校重点实验室)；曾晓晓(成都理工大学材料与化学化工学院)；王丹(成都理工大学材料与化学化工学院)；曲树栋(成都理工大学材料与化学化工学院)

Author：Sang Shihua(Inst. of Materials and Chem. Chemical Eng.,Chengdu Univ. of Technol.;Mineral Resources Chem. Key Lab. of Sichuan Higher Education Institutions)；Zeng Xiaoxiao(Inst. of Materials and Chem. Chemical Eng., Chengdu Univ. of Technol.)；Wang Dan(Inst. of Materials and Chem. Chemical Eng., Chengdu Univ. of Technol.)；Qu Shudong(Inst. of Materials and Chem. Chemical Eng., Chengdu Univ. of Technol.)

收稿日期：2010-10-26 年卷（期）页码：2011,43(4):189-193

期刊名称：工程科学与技术

Journal Name：Advanced Engineering Sciences

关键字：水盐体系；介稳相平衡；溶解度; 钾盐

Key words：salt-water system; metastable equilibrium; solubility；potassium

基金项目：国家自然科学基金资助项目(40303010，40973047);教育部新世纪优秀人才资助计划（NCET-07-0125）；四川省杰出青年学科带头人培养联合资助项目（08ZQ026-017）

中文摘要

采用等温蒸发法研究了Li+，K+//CO32-，SO42--H2O四元体系在低温273 K时的介稳固液相平衡关系，测定了介稳平衡液相的溶解度和密度。研究发现，该四元体系273 K时的介稳平衡相图有3个共饱和点，7条单变量曲线，5个固相结晶相区分别为K2SO4·Li2SO4, K2SO4, Li2SO4·H2O, Li2CO3和K2CO3·3/2H2O。研究结果表明在低温273 K时，K2CO3溶解度大，并对其他盐类有强烈的盐析作用。

英文摘要

The metastable equilibriua of the quaternary system Li+，K+//CO32-，SO42--H2O at 273 K was studied by the isothermal evaporation method. Metastable solubilities and densities of the solution were determined experimentally. Based on the experimental data, the metastable equilibrium phase diagram and water content diagram were plotted, respectively. The phase diagram in the quaternary system had three invariant points, seven univariant curves, and five crystallization fields corresponding to K2SO4·Li2SO4,K2SO4, Li2SO4·H2O,Li2CO3,and K2CO3·3/2H2O. Carbonate potassium (K2CO3) had the biggest solubility and strong salting-out effect on other salts.

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论文摘要

四元体系Li+，K+//CO32-，SO42- - H2O 273K时介稳相平衡

Study on Metastable Equilibria in the Quaternary System Li+，K+//CO32-，SO42-- H2O at 273 K