The Ternary System H3PO4-Ca(OH)2-H2O Isotherms at 15 and 45 °C

Authors

  • K. Labgairi Laboratory “Physical Chemistry of Processes and Materials”, Faculty of Sciences and Technology, University Hassan 1, BP 577, 2600 Settat
  • A. Jourani Laboratory “Physical Chemistry of Processes and Materials”, Faculty of Sciences and Technology, University Hassan 1, BP 577, 2600 Settat
  • M. Kaddami Laboratory “Physical Chemistry of Processes and Materials”, Faculty of Sciences and Technology, University Hassan 1, BP 577, 2600 Settat

DOI:

https://doi.org/10.6000/jascm.v5i2.3897

Keywords:

Solid-liquid phase equilibria, ternary system H3PO4– Ca(OH)2–H2O, calcium phosphate, isotherm

Abstract

The solid–iquid phase equilibria of the system H3PO4–Ca(OH)2–H2O were studied under air pressure using a synthetic method based on conductivity measurements. Two isotherms at 15 and 45 °C were completely defined. The stable solid phases which appear in this range of temperature are hydroxyapatite (Ca10(PO4)6(OH)2), calcium hydrogen phosphate dihydrate (CaHPO4.2H2O), calcium hydrogen phosphate anhydrous (CaHPO4) and calcium dihydrogen phosphate monohydrate (Ca(H2PO4)2.H2O). These solid phases were characterized using X ray diffraction.

References

Labgairi K, Jourani A, Kaddami M. Ternary system H3PO4– Ca(OH)2–H2O: Isotherms 30 and 60°C. Phys Chem News 2012; 64: 87-94.

Cameron FK, Seidell A. The phosphates of calcium. J Am Chem Soc I 1905; 27: 1503-12. http://dx.doi.org/10.1021/ja01990a005 DOI: https://doi.org/10.1021/ja01990a005

Cameron FK, Bell JM. The phosphates of calcium. J Am Chem Soc IV 1910; 32: 869-73. http://dx.doi.org/10.1021/ja01925a003 DOI: https://doi.org/10.1021/ja01925a003

Jourani A, Bounahmidi T. Cinétique de nucléation hétérogène et de croissance cristalline de l’hydroxyapatite lors de la précipitation spontanée des phosphates de calcium dans des solutions sucrées. J Chem Eng 2002; 89: 185-92. http://dx.doi.org/10.1016/S1385-8947(02)00028-1 DOI: https://doi.org/10.1016/S1385-8947(02)00028-1

Roger I, Martin, Brown PW. Phase Equilibria acid calcium phosphates. J Am Ceram Soc 1997; 80: 1263-6. DOI: https://doi.org/10.1111/j.1151-2916.1997.tb02973.x

VanWazer JR. Phosphorus and Its compounds. New York: Wiley 1958; I: 515.

Tenu R, Counioux JJ, Cohen-Addad R. Bull Soc Chim Fr 1979; 82: 3-4.

Kaddami M. Etude Physico-chimique du système eau-nitrate d’aluminium-nitrate d’ammonium. Application au stockage de l’énergie frigorifique. Thesis, Lyon1 University, Lyon, ON, France 1986.

Chrétien A. The quaternary system; water, sodium nitrate, sodium chloride and sodium sulfate. Ann Chim 1929; 12: 26.

Schreinmakers FAH. Stoechiom. Verwandtschaftsl. Z Phys Chim 1893; 11: 76.

Labgairi K, Jourani A, Kaddami M. An isothermal (30 C) study of heterogeneous equilibria in the sucrose (C12H22O11)– calcium hydroxide (Ca(OH)2)–water system. Fluid Phase Equilibria 2011; 307: 100-3. http://dx.doi.org/10.1016/j.fluid.2011.03.009 DOI: https://doi.org/10.1016/j.fluid.2011.03.009

Downloads

Published

2016-05-30

How to Cite

Labgairi, K., Jourani, A., & Kaddami, M. (2016). The Ternary System H3PO4-Ca(OH)2-H2O Isotherms at 15 and 45 °C. Journal of Applied Solution Chemistry and Modeling, 5(2), 76–81. https://doi.org/10.6000/jascm.v5i2.3897

Issue

Section

General Articles