Properties of MgOHCl
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10. K.L. Strelets: Electrolytic Production of Magnesium, Israel Program for Scientific Translation, Keter Press Enterprises, Jerusalem, 1977. 11. G.J. Kipouros and D.R. Sadoway: in Advances in Molten Salt Chemistry 6, G. Mamantov, C.B. Mamantov, and J. Braunstein, eds., Elsevier, New York, NY, 1987, pp. 127-209. 12. M. Lamy: Master’s Thesis, McGill University, Montreal, 2001. 13. M. Kreuh: Master’s Thesis, McGill University, Montreal, 2001. 14. S. Kashani-Nejad, K.-W. Ng, and R. Harris: in Light Metals 2003, J. Masounnave and G. Dufour, eds., METSOC, CIM, Montreal, 2003, pp. 515-26. 15. FACTSage™, Ecole Polytechnique CRCT, Montreal, www.factsage.com.
Properties of MgOHCl Fig. 2—XRD spectrum of MgOHCl obtained from controlled dehydration of MgCl26H2O.
From this result, it was concluded that crystalline MgOHCl was successfully produced by the described method. Further work was carried out to determine the purity of MgOHCl produced. The sample was dissolved in 0.1 N HCl (aq). The solution was then titrated against 0.1 N NaOH (aq) for determination of acid consumption. From the volume of acid consumed, the amount of MgOHCl in the sample was determined according to the following reaction: MgOHCl HCl → MgCl2 H2O It was found that the mass of MgOHCl determined from the titration result represented more than 95 pct of the sample mass. Based on this result, it could be seen that the purity of the MgOHCl produced in the present work was higher than 95 pct. In conclusion, high-purity crystalline MgOHCl was successfully prepared by controlled dehydration of MgCl26H2O. The success in preparation of the MgOHCl sample has considerable importance in scientific and industrial applications due to the availability of the reference sample for characterization of MgOHCl physical and chemical properties. The difficulty of isolating oxides from other dehydration products was overcome by the low solubility of MgOHCl in methanol. The formation of crystalline MgOHCl as the only oxide species during dehydration can be assured by carrying out the dehydration process at lower than 376 °C with heating rate not exceeding 5 °C per minute. The purity of the MgOHCl produced by the described procedure was found to be higher than 95 pct. REFERENCES 1. W. Moldenhauer: Z. Anorg. Chem., 1906, vol. 51, pp. 369-90. 2. K.K. Kelley: United States Bureau of Mines Technical Paper 676, United States Government Printing Office, Washington, DC, 1945. 3. V.B. Kasner: Tonid. Zt. U. Kerm. Rundschau, 1958, vol. 82, pp. 290-91. 4. Y.E. Vilnyansky and E.I. Savinkova: Z. Prikl. Khim., 1955, vol. 28, pp. 864-71. 5. A.I. Orekhova, R.P. Lelekova, and E.I. Savinkova: Z. Prikl. Khim., 1979, vol. 52 (11), pp. 2597-99. 6. Y.E. Vilnyansky and E.I. Savinkova: J. Appl. Chem. USSR, 1953, No. 26, pp. 735-39. 7. D.A. Chauhan: Indian Chem. J., 1975, vol. 9 (12), pp. 13-16. 8. F.H. Herbstein, M. Kapon, and A. Weissman: Israel J. Chem., 1982, vol. 22, pp. 207-13. 9. B.N. Chaudhuri, P. Ray, and P.K. Das-Poddar: Trans. Indian Ceram. Soc., 1987, vol. 4
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