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Metastable Phase Equilibrium in the Aqueous Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 323.15 K
Guo, Yafei1,2; Yin, Hongjun1,4; Wu, Xianghua1,4; Deng, Tianlong1,2,3
2010-10-01
Source PublicationJOURNAL OF CHEMICAL AND ENGINEERING DATA
Volume55Issue:10Pages:4216-4220
SubtypeArticle
AbstractExperimental studies on the metastable solubilities and physicochemical properties (density, viscosity, pH. and refractive index) of the aqueous quaternary system (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 323.15 K were determined with the method of isothermal evaporation. On the basis of experimental data, the metastable phase diagram and the diagram of physicochemical properties versus composition were plotted. There are six invariant points, twelve univariant curves, and seven crystallization zones corresponding to halite, thenardite, vanthoffite (3NaSO(4)center dot MgSO4), astrakanite (NaSO4 center dot MgSO4 center dot 4H(2)O), hexahydrite (MgSO4 center dot 6H(2)O), tetrahydrite (MgSO4 center dot 4H(2)O), and bischofite (MgCl2 center dot 6H(2)O). There is no solid solution except two double salts of vanthoffite and astrakanite which existed in the metastable system. When compared with the stable equilibrium phase diagram at 328.15 K. the crystallized zones of loeweite (6Na(2)SO(4)center dot 7MgSO(4)center dot 15H(2)O) and kieserite (MgSO4 center dot H2O) disappeared; the areas of halite and hexahydrite increased: and the areas of thenardite, astrakanite, and vanthoffite decreased. It is indicated that the metastable phenomena of sodium sulfate and magnesium sulfate are significant. The physicochemical properties (density, viscosity. pH. and refractive index) in the metastable equilibrium system change regularly with the mass fraction change of the magnesium ion.
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS Keyword308.15 K
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Multidisciplinary ; Engineering, Chemical
WOS IDWOS:000282848400014
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Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/5949
Collection青海盐湖研究所知识仓储
Affiliation1.Chengdu Univ Technol, Coll Mat Chem & Chem Engn, Chengdu 610059, Peoples R China
2.Tianjin Univ Sci & Technol, Coll Marine Sci & Engn, Tianjin Key Lab Marine Resources & Chem, Tianjin 300457, Peoples R China
3.Chinese Acad Sci, Qinghai Inst Salt Lakes, ACS Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China
4.SINOPEC, Inst Petr Geochem Explorat, Explorat & Prod Res Inst, Hefei 230022, Peoples R China
Recommended Citation
GB/T 7714
Guo, Yafei,Yin, Hongjun,Wu, Xianghua,et al. Metastable Phase Equilibrium in the Aqueous Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 323.15 K[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2010,55(10):4216-4220.
APA Guo, Yafei,Yin, Hongjun,Wu, Xianghua,&Deng, Tianlong.(2010).Metastable Phase Equilibrium in the Aqueous Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 323.15 K.JOURNAL OF CHEMICAL AND ENGINEERING DATA,55(10),4216-4220.
MLA Guo, Yafei,et al."Metastable Phase Equilibrium in the Aqueous Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 323.15 K".JOURNAL OF CHEMICAL AND ENGINEERING DATA 55.10(2010):4216-4220.
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