Metastable Phase Equilibrium in the Aqueous Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 323.15 K

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	Metastable Phase Equilibrium in the Aqueous Quaternary System (NaCl + MgCl2 + Na2SO4 + MgSO4 + H2O) at 323.15 K
	Guo, Yafei 1,2; Yin, Hongjun 1,4; Wu, Xianghua 1,4; Deng, Tianlong 1,2,3
	2010-10-01
发表期刊	JOURNAL OF CHEMICAL AND ENGINEERING DATA
卷号	55 期号:10 页码:4216-4220
摘要	Experimental 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.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5949
专题	青海盐湖研究所知识仓储
作者单位	1.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
推荐引用方式 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.