Solid-liquid phase equilibria of Ca(H2PO2)2-CaCl2-H2O and Ca(H2PO2)2-NaH2PO2-H2O ternary systems at 298.15 K

被引：14

作者：

Tan, Li-na ^{[1
]}

Wang, Jun-min ^{[2
]}

Zhou, Huan ^{[1
]}

Wang, Li-hua ^{[1
]}

Wang, Pin ^{[1
]}

Bai, Xiaoqin ^{[1
]}

机构：

[1] Tianjin Univ Sci & Technol, Coll Marine Sci & Engn, Tianjin Key Lab Marine Resources & Chem, Tianjin Teda 300457, Peoples R China

[2] Hubei Sky Lake Chem Co Ltd, Tianmen City 431702, Hubei, Peoples R China

来源：

FLUID PHASE EQUILIBRIA | 2015年 / 388卷

基金：

中国国家自然科学基金;

关键词：

Solid-liquid equilibria; Phase diagram; Calcium hypophosphite; Sodium hypophosphite; Calcium chloride; CALCIUM HYPOPHOSPHITE; SOLUBILITY;

D O I：

10.1016/j.fluid.2014.12.047

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Calcium hypophosphite has been widely used as an anti-corrosive agent, flame retardant, fertilizer, assistant for Ni electroless plating, and animal nutrition supplements. High purity calcium hypophosphite can be synthesized via the replacement reaction of sodium hypophosphite and calcium chloride. In this work, the solid liquid phase equilibria of Ca(H2PO2)(2)-CaCl2-H2O and Ca (H2PO2)(2)-NaH2PO2-H(2)0 ternary systems at 298.15 K were studied experimentally via the classical isothermal solubility equilibrium method, and the phase diagrams for these two systems were obtained. It was found that two solid salts of Ca(H2PO2)(2) and CaCl2 center dot 6H(2)O, and three solid salts of Ca(H2PO2)(2), NaCa (H2PO2)(3), and NaH2PO2 center dot H2O can form in the corresponding systems under phase-equilibrium conditions. Ca(H2PO2)(2) has low solubility in the Ca(H2PO2)(2)-CaCl2-H2O system. NaCa(H2PO2)(3) occupies a large solid field in the ternary system of Ca(H2PO2)(2)-NaH2PO2-H2O. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：66 / 70

页数：5

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