The Solubilities and Physicochemical Properties of NaH₂PO₂–NaCl–H₂O, NaH₂PO₂–Zn(H₂PO₂)₂–H₂O, and NaCl–Zn(H₂PO₂)₂–H₂O Ternary Systems and in NaH₂PO₂–NaCl–Zn(H₂PO₂)₂–H₂O Quaternary System at 298.15 K

Abstract

The physicochemical properties and solubilities of NaH 2 PO 2 − Zn(H 2 PO 2 ) 2 −H 2 O, NaH 2 PO 2 −NaCl−H 2 O, and NaCl−Zn(H 2 PO 2 ) 2 −H 2 O ternary systems and in NaH 2 PO 2 −NaCl−Zn(H 2 PO 2 ) 2 −H 2 O quaternary system at 298.15 K were investigated via the isothermal method. Invariant point compositions represent the quaternary system were characterized as the following: 10.65% mass NaCl, 32.51% mass NaH 2 PO 2 , 6.50% mass Zn(H 2 PO 2 ) 2 , and 50.34% mass H 2 O. In solid phases, the salts of Zn(H 2 PO 2 ) 2 .H 2 O, NaCl and NaH 2 PO 2 ·H 2 O were recognized. The crystallization area of the salts were obtained as (i) 79.04% Zn(H 2 PO 2 ) 2 , (ii) 18.62% NaCl and (iii) 2.34% NaH 2 PO 2 . Being the least soluble salt, Zn(H 2 PO 2 ) 2 has the largest crystallization area when compared with other salts present in the medium. According to the results, the crystallization area of was the largest in comparison with those of other salts and at the same time it was the least soluble salt.

Solid-liquid phase equilibria of H2O-Mn(H2PO2)2-MnCl2-NaCl, H2O-Mn(H2PO2)2-MnCl2 and (H2O-NaCl- MnCl2 systems at 323.15 K

“…Phase equilibria were determined according to isothermal solubility saturation method. 12,15 All the experiments were carried out at atmospheric pressure (0.1025 MPa). The general procedure of the experiment is as below: 1) In the ternary system, the binary system saturated solution was prepared in a waterproof isolated tube, and placed in a water bath stabilized at 323.15 K.…”

“…The synthesis of hypophosphites obtained from hydroxides of insoluble elements in the water is generally synthesized both via multi-step reactions and expensively. 4,[8][9][10][11][12][13][14][15] Phase equilibriums are widely used as a method in the study of equilibrium relationships. In the salt industry, they are used to increase production efficiency, and also for the recovery of valuable chemicals.…”

“…SLE data of salts including H2PO2ion were given in Table I. [8][9][10][11][12][13][14][15][18][19][20][21][22] 20 Mg(H2PO2)2 + NaH2PO2 + H2O at 298 K Mg(H2PO2)2 +MgCl2 + H2O at 298 K Yin et al 19 Ca(H2PO2)2 +CaCl2 + H2O Ca(H2PO2)2 + NaH2PO2 + H2O Shi et al 21 Mg(H2PO2)2 + NaH2PO2 + H2O Mg(H2PO2)2 + MgCl2 + H2O…”

NaCl-NaH2PO2- Zn(H2PO2)2-H2O Dörtlü Sisteminin 333.15K’de Katı-Sıvı Faz Dengelerinin İncelenmesi

“…2016 yılında ise hipofosfitlerle ilgili Cao ve arkadaşları 323.15K'de kalsiyum ve sodyum hipofosfitlere ait [10], Gao ve diğerleri magnezyum ve sodyum hipofosfitlere ait [12] ve çalışma grubumuz çinko ve sodyum hipofosfitlere ait üçlü sistemleri [19] araştırmışlardır. Ca(H2PO2)2 + CaCl2 + H2O ve Ca(H2PO2)2 + NaH2PO2 + H2O sistemleri 273.15K'de araştırılıp faz dengeleri oluşturulmuştur [11].…”

A Separating Method For NaH2 PO2 and NaCl Salts From Their Solutions Using Solid-Liquid Phase Equilibria

“…Suda hidroksitleri çözünmeyen bileşiklerden hipofosfit tuzlarının eldesi çok basamaklı olduğundan hem pahalı hem de zordur. Fizikokimyasal özellikler kullanılarak bahsi geçen hipofosfit tuzlarının eldesi daha kolay ve ekonomiktir (Karyagin, 1947;Alişoğlu, 2002 (Demirci et al, 2016). …”