当前位置：
X-MOL 学术
›
J. Chem. Eng. Data
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Study on the Phase Equilibrium of the Quaternary Na2SO4–NaBr–NH4Br–(NH4)2SO4–H2O System at 298.15 and 323.15 K
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2024-01-23 , DOI: 10.1021/acs.jced.3c00629
Mingyuan Xi 1 , Yun Li 1 , Haijie Tian 1 , Hongfei Guo 1 , Jilin Cao 1
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2024-01-23 , DOI: 10.1021/acs.jced.3c00629
Mingyuan Xi 1 , Yun Li 1 , Haijie Tian 1 , Hongfei Guo 1 , Jilin Cao 1
Affiliation
|
In order to provide a theoretical basis for the comprehensive utilization of bittern resources, the phase equilibrium data of the ternary NH4Br–(NH4)2SO4–H2O system and quaternary Na2SO4–NaBr–NH4Br–(NH4)2SO4–H2O system at 298.15 and 353.15 K were determined by the isothermal method, and the phase diagrams were depicted. It was found that the phase diagrams of the ternary systems at 298.15 and 323.15 K were similar, with one invariant point, two univariant curves, and three crystallization regions. The phase diagram of the quaternary system at 298.15 K included four invariant points, six crystallization regions, and nine invariant curves. At 323.15 K, the phase diagram of the quaternary system comprised three invariant points, five crystallization regions, and seven invariant curves. According to the Pitzer and HW models, the experimental values of the ternary system at 298.15 K were used to fit the ion interaction parameter ψNH4–SO4–Br by the least-squares method. The solubility of the quaternary system at 298.15 K was calculated using the known Pitzer parameters and interaction parameters, and the calculated values were basically consistent with the experimental values.
中文翻译：
四元Na2SO4–NaBr–NH4Br–(NH4)2SO4–H2O体系在298.15和323.15 K下的相平衡研究
为了给卤水资源的综合利用提供理论依据，研究了三元NH 4 Br–(NH 4 ) 2 SO 4 –H 2 O体系和四元Na 2 SO 4 –NaBr–NH 4 Br的相平衡数据。采用等温法测定了298.15和353.15 K下的-(NH 4 ) 2 SO 4 -H 2 O体系，并绘制了相图。结果发现，298.15和323.15 K时三元体系的相图相似，有1个不变点、2条单变量曲线和3个结晶区。298.15 K 时四元体系的相图包括 4 个不变点、6 个结晶区和 9 条不变曲线。在 323.15 K 时，四元体系的相图由 3 个不变点、5 个结晶区和 7 条不变曲线组成。根据Pitzer和HW模型，利用三元体系在298.15 K的实验值，采用最小二乘法拟合离子相互作用参数ψ NH 4 –SO 4 –Br 。利用已知的Pitzer参数和相互作用参数计算了四元体系在298.15 K下的溶解度，计算值与实验值基本一致。
更新日期：2024-01-23
中文翻译：
四元Na2SO4–NaBr–NH4Br–(NH4)2SO4–H2O体系在298.15和323.15 K下的相平衡研究
为了给卤水资源的综合利用提供理论依据，研究了三元NH 4 Br–(NH 4 ) 2 SO 4 –H 2 O体系和四元Na 2 SO 4 –NaBr–NH 4 Br的相平衡数据。采用等温法测定了298.15和353.15 K下的-(NH 4 ) 2 SO 4 -H 2 O体系，并绘制了相图。结果发现，298.15和323.15 K时三元体系的相图相似，有1个不变点、2条单变量曲线和3个结晶区。298.15 K 时四元体系的相图包括 4 个不变点、6 个结晶区和 9 条不变曲线。在 323.15 K 时，四元体系的相图由 3 个不变点、5 个结晶区和 7 条不变曲线组成。根据Pitzer和HW模型，利用三元体系在298.15 K的实验值，采用最小二乘法拟合离子相互作用参数ψ NH 4 –SO 4 –Br 。利用已知的Pitzer参数和相互作用参数计算了四元体系在298.15 K下的溶解度，计算值与实验值基本一致。
京公网安备 11010802027423号