(Solid+liquid) phase equilibrium for the ternary system (NaCl+NaH2PO4+H2O) at T=(298.15 and 313.15)K and atmospheric pressure

Stable (solid+liquid) phase equilibrium for the ternary systems (K2SO4+KH2PO4+H2O), (K2SO4+KCl+H2O) at T=313.15K

“…The H 2 PO 4 -concentration was determined by the quinoline phosphomolybdate gravimetric method [17][18][19] with a standard uncertainty of 0.004 in mass fraction. The sulfate ion concentration was obtained by means of barium sulfate turbidimetry [20,21] with a standard uncertainty of 0.002 in mass fraction. The Cl À concentration was determined by Volhard method [22,23] with a standard uncertainty of 0.005 in mass fraction.…”

Solubility and physic-chemical properties of NaH2PO4 in phosphoric acid, sodium chloride and their mixture solutions at T=(298.15 and 313.15)K

“…The concentration of H 2 PO 4 À in the liquids was measured by the quinoline phosphomolybdate gravimetric method [23][24][25][26] The chloride ion concentration was determined by means of Volhard method [2,27]. The density (q) was measured with a specific weighing bottle method [26,28] The viscosity (g) was determined by an Ubbelohde capillary viscometer.…”

“…(2) and (3), K 2 is far greater than K 1 , Eq. (3) is mainly the phosphoric acid dissociation equilibrium of the solution.…”

“…It is also used in medicine, food, chemical industry, water treatment and other fields [2][3][4] It is also used as pH buffer when combined with other sodium phosphates. Moreover, it is also used as fuel and detergent additives [5,6] From the production point of view, China is the largest places of producing sodium dihydrogen phosphate in the world, which occupies the dominant position in international trade.…”

KH2PO4 Production by Cooling Crystallization Using Its Phase Equilibrium in the KH2PO4‐KCl‐C2H5OH‐H2O System

“…The remainder of liquid phase continued to rest in the constant-temperature water bath. Then it was used to measure the relative physicochemical properties (m, r) of the liquid phase, and the wet residue was identified by Schreinemaker's method [18,19]. The total weight of the wet residues was also measured accurately.…”