Skip to main content
SpringerLink
Log in

Solubility and Density of Hydrated Aluminas in NaOH Solutions

  • Transaction
  • Published:
JOM Aims and scope Submit manuscript

Abstract

Solubilities and densities are reported for alumina hydrates in NaOH solutions under the conditions of the Bayer process employed to purify alumina for aluminum production. The equilibrium constants for reactions to form AlO2- accurately correlate the effects of NaOH concentration on the solubilities; the temperature coefficients of the equilibria lead to heats of solution of 7.34, 4.76, and 5.24 kcal for the a trihydrate, α monohydrate, and β trihydrate, respectively. Moderate calcination does not change the solubility of the a trihydrate but increases that of the α monohydrate. At solution temperatures above 100°C, the trihydrates transform rapidly to a monohydrate. Hydro-thermally produced α monohydrate is the stable phase above 20°C.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. M. Tosterud: U. S. Patent No. 1,953,201 (Apr. 3, 1934).

    Google Scholar 

  2. J. D. Edwards, F. C. Frary, and Z. Jeffries: Aluminum and Its Production. (1930) New York. McGraw-Hill Book Co. Inc.

    Google Scholar 

  3. A. S. Russell: Aluminum Research Laboratories Technical Paper No. 10. (1953) Pittsburgh. Aluminum Co. of America.

    Google Scholar 

  4. F. Goudriaan: Recueil des travaux chimiques (1922) 41, pp. 82–95.

    Article  Google Scholar 

  5. R. Fricke and P. Jucaitis: Ztsch. Anorg. Allgem. Chemie (1930) 191, pp. 129–149.

    Article  Google Scholar 

  6. G. K. Magarchak: Legkie Metally (1938) 7, pp. 12–16.

    Google Scholar 

  7. J. W. Sprauer and D. W. Pearce: Journal of Physical Chemistry (1940) 44, pp. 909–916.

    Article  Google Scholar 

  8. G. Bauermeister: Aluminium (1938) 23, No. 4, pp. 205–208.

    Google Scholar 

  9. G. Bauermeister and W. Fulda: Aluminium (1943) 25, pp. 97–105.

    Google Scholar 

  10. T. Tomonari: Journal Soc. Chem. Ind, Japan (1942) 45, p. 288B; (1944) 47, pp. 28–30.

    Google Scholar 

  11. E. Herrmann: Ztsch. Anorg. Allgem. Chemie (1953) 274, pp. 81–104.

    Article  Google Scholar 

  12. H. C. Stumpf, A. S. Russell, J. W. Newsome, and C. M. Tucker: Industrial and Engineering Chemistry (1950) 42, pp. 1398–1403.

    Article  Google Scholar 

  13. Selected Values of Chemical Thermodynamic Properties. Washington. National Bureau of Standards.

  14. A. M. Hayward and E. P. Perman: Trans. Faraday Soc. (1930) 27, pp. 59–69.

    Article  Google Scholar 

  15. R. A. Robinson and R. H. Stokes: Trans. Faraday Soc. (1949) 45, pp. 612–624.

    Article  Google Scholar 

  16. S. Lacroix: Anal. Chemistry Acta (1947) 1, pp. 260–290.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Aluminum Research Laboratories, Aluminum Co. of America, New Kensington, Pa., USA

    Allen S. Russell (associated), Junius D. Edwards (associated) & Cyril S. Taylor (associated)

Authors
  1. Allen S. Russell
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Junius D. Edwards
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Cyril S. Taylor
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Discussion of this paper, TP 4027D, may be sent, 2 copies, to AIME by Dec. 1, 1955. Manuscript, Nov. 26, 1954. Chicago Meeting, February 1955.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Russell, A.S., Edwards, J.D. & Taylor, C.S. Solubility and Density of Hydrated Aluminas in NaOH Solutions. JOM 7, 1123–1128 (1955). https://doi.org/10.1007/BF03377627

Download citation

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF03377627

Search

Navigation