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Metastable Phase Equilibrium in the Aqueous Ternary System K2SO4+MgSO4+H2O at (288.15 and 308.15) K
Deng, Tianlong1,2; Yu, Xue1; Li, Dongchan1,2
2009
Source PublicationJOURNAL OF SOLUTION CHEMISTRY
Volume38Issue:1Pages:27-34
SubtypeArticle
AbstractThe metastable solubilities and densities of the aqueous ternary system K2SO4+MgSO4+H2O at (288.15 and 308.15) K were determined with the isothermal evaporation method. Using the experimental results, the metastable phase diagram and the densities versus composition diagram were plotted. In the metastable phase diagrams of the ternary system at (288.15 and 308.15) K, there are in all two invariant points, three univariant solubility curves, and three metastable crystallization regions corresponding to arcanite (i.e., anhydrous potassium sulfate, K2SO4), picromerite (K2SO4 center dot MgSO4 center dot 6H(2)O) and epsomite (MgSO4 center dot 7H(2)O) that are formed in the metastable equilibrium system. A comparison of the stable and metastable phase diagrams at each temperature shows that the metastable regions of magnesium sulfate are obvious, and the crystallizing regions of epsomite and arcanite are much larger than those in the stable phase diagram. The densities of the system changed regularly with the magnesium sulfate content. The resulting information can be used to recover potassium or remove magnesium. The calculated densities using an empirical equation agree well with the experimental results.
KeywordMetastable Phase Equilibrium Phase Diagram Solubility Potassium Sulfate Picromerite
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordQUATERNARY SYSTEM ; QUINARY SYSTEM ; MG2+//CL ; NA+
Indexed BySCI
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000261342600003
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Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/5903
Collection青海盐湖研究所知识仓储
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
2.Chengdu Univ Technol, Coll Mat Chem & Chem Engn, Chengdu 610059, Peoples R China
Recommended Citation
GB/T 7714
Deng, Tianlong,Yu, Xue,Li, Dongchan. Metastable Phase Equilibrium in the Aqueous Ternary System K2SO4+MgSO4+H2O at (288.15 and 308.15) K[J]. JOURNAL OF SOLUTION CHEMISTRY,2009,38(1):27-34.
APA Deng, Tianlong,Yu, Xue,&Li, Dongchan.(2009).Metastable Phase Equilibrium in the Aqueous Ternary System K2SO4+MgSO4+H2O at (288.15 and 308.15) K.JOURNAL OF SOLUTION CHEMISTRY,38(1),27-34.
MLA Deng, Tianlong,et al."Metastable Phase Equilibrium in the Aqueous Ternary System K2SO4+MgSO4+H2O at (288.15 and 308.15) K".JOURNAL OF SOLUTION CHEMISTRY 38.1(2009):27-34.
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