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Acta Chimica Sinica ›› 2006, Vol. 64 ›› Issue (22): 2247-2253. Previous Articles Next Articles
Original Articles
桑世华*, 殷辉安, 曾英, 刘凤英
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SANG Shi-Hua*; YIN Hui-An; ZENG Ying; LIU Feng-Ying
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An experimental study on metastable equilibria at 288 K in the quaternary system Li+, Na+//SO42-, CO32--H2O was done by isothermal evaporation method. Metastable equilibrium solubilities and physico-chemical properties such as density, conductivity, pH, refractive index and viscosity of the solution were determined experimentally. The experimental results of the metastable equilibria show that the double salt [Na3Li(SO4)2•6H2O] forms in the quaternary system Li+, Na+//SO42-, CO32--H2O at 288 K. According to the experimental data, the metastable equilibrium phase diagram and the physico-chemical composition diagram were plotted. In the metastable phase diagram, the quaternary system has three invariant points, seven univariant curves, five fields of crystallization [Li2SO4•H2O, Na2SO4, Li2CO3, Na2CO3•10H2O, Na3Li(SO4)2•6H2O]. The double salt Na3Li(SO4)2•6H2O and Li2SO4•H2O have smaller crystallization fields than the others. The crystallization field of Na2SO4•10H2O was not found in the metastable equilibria.
Key words: metastable equilibrium, carbonate, sulfate, solubility
SANG Shi-Hua*; YIN Hui-An; ZENG Ying; LIU Feng-Ying. Study on Metastable Equilibria in Quaternary System Li+, Na+// SO42-, CO32--H2O at 288 K[J]. Acta Chimica Sinica, 2006, 64(22): 2247-2253.
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