(Solid+Liquid) Equilibria in the Quaternary System Na2B4O7‐MgB4O7‐K2B4O7‐H2O at 288 K

Chinese Journal of Chemistry - Tập 28 Số 5 - Trang 755-758 - 2010
Song Shihua, Jiang Peng1
1College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan, 610059, China

Tóm tắt

Abstract(Solid+Liquid) phase equilibria in the quaternary system Na2B4O7‐MgB4O7‐K2B4O7‐H2O 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 Na2B4O7‐MgB4O7‐K2B4O7‐H2O at 288 K, there are one invariant point E, three univariant curves E1E, E2E and E3E, and three fields of crystallization corresponding to Na2B4O7·10H2O, K2B4O7·4H2O and MgB4O7·9H2O. The experimental results show that potassium borate (K2B4O7·4H2O) have higher solubilities than the magnesium borate and sodium borate in the quaternary system Na2B4O7‐MgB4O7‐K2B4O7‐H2O at 288 K.

Từ khóa


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Thông tin
Thông tin xuất bản

Chinese Journal of Chemistry

Tập 28 Số 5

755-758

Thông tin tác giả