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(Solid+Liquid) Equilibria in the Quaternary System Na 2 B 4 O 7 ‐MgB 4 O 7 ‐K 2 B 4 O 7 ‐H 2 O at 288 K
Author(s) -
Song Shihua,
Peng Jiang
Publication year - 2010
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201090142
Subject(s) - chemistry , phase diagram , boron , crystallization , saturation (graph theory) , solubility , isothermal process , analytical chemistry (journal) , double salt , phase (matter) , crystallography , inorganic chemistry , thermodynamics , chromatography , physics , organic chemistry , mathematics , combinatorics
(Solid+Liquid) phase equilibria in the quaternary system Na 2 B 4 O 7 ‐MgB 4 O 7 ‐K 2 B 4 O 7 ‐H 2 O at 288 K were studied experimentally using the method of isothermal solution saturation. Solubility of any single salt in the solution of the quaternary system was determined experimentally. Based on the experimental data achieved, the phase diagram and water content diagram of the quaternary system were constructed, respectively. In the phase equilibrium diagram of the quaternary system Na 2 B 4 O 7 ‐MgB 4 O 7 ‐K 2 B 4 O 7 ‐H 2 O at 288 K, there are one invariant point E , three univariant curves E 1 E , E 2 E and E 3 E , and three fields of crystallization corresponding to Na 2 B 4 O 7 ·10H 2 O, K 2 B 4 O 7 ·4H 2 O and MgB 4 O 7 ·9H 2 O. The experimental results show that potassium borate (K 2 B 4 O 7 ·4H 2 O) have higher solubilities than the magnesium borate and sodium borate in the quaternary system Na 2 B 4 O 7 ‐MgB 4 O 7 ‐K 2 B 4 O 7 ‐H 2 O at 288 K.