Studies on the Isothemal Solubilities of the Quaternary System KCl-K2SO4-CO(NH2)2-H2O at 25℃

Abstract

Abstract: The isothermal solubilities and the refraction indices, densities of the saturatedsolutions in the quaternary system KCl-K₂SO₄-CO(NH₂)₂-H₂Owere investigated at 25℃ forthe first time.The isograms of the refraction indices, densities and water-content of the sat-urated solutions corresponding to K₂SO₄ have been obtained.The phase diagram of the qua-ternary system is simple cutectic type,in which there is a triple saturated point, KCl 14.06,K₂SO₄ 0.51, CO(NH₂)₂ 47.05, H₂O38.88 (mass fraction×10²).

Key words: Solubility diagram, Phase equilibrium, Potassium sulfate, Potassium chlioride, Urea

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ZHANG Feng-Xing, WEI Xiao-Lan, ZHOU Xia, GUO Zhi-Zhen. Studies on the Isothemal Solubilities of the Quaternary System KCl-K₂SO₄-CO(NH₂)₂-H₂O at 25℃[J]. Chem. J. Chinese Universities, 1997, 18(4): 605.

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Studies on the Isothemal Solubilities of the Quaternary System KCl-K₂SO₄-CO(NH₂)₂-H₂O at 25℃

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