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Solid–Liquid Equilibrium in the Ternary MgBr2–MgSO4–H2O System at 348.15 K and Its Application
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2021-09-03 , DOI: 10.1021/acs.jced.1c00392 Yulong Zhang 1, 2 , Yun Li 1 , Hongfei Guo 1 , Jilin Cao 1
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2021-09-03 , DOI: 10.1021/acs.jced.1c00392 Yulong Zhang 1, 2 , Yun Li 1 , Hongfei Guo 1 , Jilin Cao 1
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The solid–liquid equilibrium of the ternary MgBr2–MgSO4–H2O system at 348.15 K was explored by using the isothermal equilibrium method, intending to realize the comprehensive utilization of the basic magnesium bromide (MgBrOH) waste residue produced in maltol production. It was observed that the phase diagram was composed of four single-salt crystallization regions, four univariate solubility curves, three invariant points saturated with MgSO4·6H2O + MgSO4·4H2O, MgSO4·4H2O + MgSO4·H2O, and MgSO4·H2O + MgBr2·6H2O, respectively, and three corresponding cocrystallization zones. Neither double salts nor a solid solution appears. The ion-interaction parameters at 348.15 K were determined using the Pitzer model, which were proven effective on this system. The calculated and experimental solubilities are coincident essentially. Based on the obtained phase diagram, a new technological process for the extraction of MgSO4 and MgBr2 from MgBrOH was proposed, and the purity of MgBr2 product was up to 99.65%. The MgBrOH waste residue produced from maltol production would achieve further development and create more benefits.
中文翻译：
三元MgBr2-MgSO4-H2O体系中348.15 K的固液平衡及其应用
采用等温平衡法探索三元MgBr 2 -MgSO 4 -H 2 O体系在348.15 K的固液平衡，旨在实现麦芽酚生产中产生的碱性溴化镁（MgBrOH）废渣的综合利用. 观察到相图由四个单盐结晶区、四个单变量溶解度曲线、三个饱和MgSO 4 ·6H 2 O + MgSO 4 ·4H 2 O、MgSO 4 ·4H 2 O + MgSO 4 的不变点组成·H 2 O、MgSO 4 ·H 2O + MgBr 2 ·6H 2 O 分别和三个相应的共结晶区。既不出现复盐也不出现固溶体。使用 Pitzer 模型确定了 348.15 K 处的离子相互作用参数，该模型在该系统上被证明是有效的。计算的和实验的溶解度基本上是一致的。基于所获得的相图上，对于硫酸镁进行提取的新工艺过程4和MgBr 2从MgBrOH提出，和MgBr的纯度2产物达99.65％。麦芽酚生产过程中产生的MgBrOH废渣将得到进一步发展，创造更多效益。
更新日期：2021-10-14
中文翻译：
三元MgBr2-MgSO4-H2O体系中348.15 K的固液平衡及其应用
采用等温平衡法探索三元MgBr 2 -MgSO 4 -H 2 O体系在348.15 K的固液平衡，旨在实现麦芽酚生产中产生的碱性溴化镁（MgBrOH）废渣的综合利用. 观察到相图由四个单盐结晶区、四个单变量溶解度曲线、三个饱和MgSO 4 ·6H 2 O + MgSO 4 ·4H 2 O、MgSO 4 ·4H 2 O + MgSO 4 的不变点组成·H 2 O、MgSO 4 ·H 2O + MgBr 2 ·6H 2 O 分别和三个相应的共结晶区。既不出现复盐也不出现固溶体。使用 Pitzer 模型确定了 348.15 K 处的离子相互作用参数，该模型在该系统上被证明是有效的。计算的和实验的溶解度基本上是一致的。基于所获得的相图上，对于硫酸镁进行提取的新工艺过程4和MgBr 2从MgBrOH提出，和MgBr的纯度2产物达99.65％。麦芽酚生产过程中产生的MgBrOH废渣将得到进一步发展，创造更多效益。
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