化工环保2025，Vol.45Issue(2)：234-240,7.DOI:10.3969/j.issn.1006-1878.2025.02.010
343.15 K下NaCl-NaNO3-Na2SO4-H2O四元体系相平衡研究
Phase equilibrium of NaCl-NaNO3-Na2SO4-H2O quaternary system at 343.15 K
陈鑫 1陈杭 2边超 2宋兴福2
作者信息
- 1. 中石化宁波工程有限公司,浙江 宁波 315048
- 2. 华东理工大学 国家盐湖资源综合利用工程技术研究中心,上海 200237
- 折叠
摘要
Abstract
The phase equilibrium data of three ternary systems(NaCl-NaNO3-H2O,NaCl-Na2SO4-H2O,and NaNO3-Na2SO4-H2O)and the quaternary system(NaCl-NaNO3-Na2SO4-H2O)at 343.15 K were determined by the isothermal dissolution equilibrium method.The results indicate that the NaCl-NaNO3-H2O and NaCl-Na2SO4-H2O ternary systems are simple co-saturated systems,with no double salts or co-solutes formed,while the NaNO3-Na2SO4-H2O system has a small crystallization region of the double salt NaNO3·Na2SO4·H2O.The quaternary system NaCl-NaNO3-Na2SO4-H2O consists of the Na2SO4 crystallization region,NaCl crystallization region,NaNO3 crystallization region,and double salt NaNO3·Na2SO4·H2O crystallization region.NaCl and NaNO3 have a strong salting-out effect on Na2SO4,and the area of the Na2SO4 crystallization regions is significantly larger than that of other crystallization regions.In order to reduce the influence of the double salt crystallization region on the fractal crystallization process,the corresponding crystallization operating temperature should be higher than 343.15 K.关键词
高盐废水/分质结晶/相平衡/氯化钠/硫酸钠/硝酸钠Key words
high-salinity wastewater/fractal crystallization/phase equilibrium/sodium chloride/sodium sulphate/sodium nitrate分类
环境科学引用本文复制引用
陈鑫,陈杭,边超,宋兴福..343.15 K下NaCl-NaNO3-Na2SO4-H2O四元体系相平衡研究[J].化工环保,2025,45(2):234-240,7.
