Abstract
IN a process for making pure alumina which is being investigated by us1, the intermediate product is a basic aluminium sulphate, averaging 39.5 per cent alumina, 40.5 per cent sulphur trioxide and 20 per cent water. This material is isomorphous with the alunite series, giving an X-ray diffraction pattern almost identical with the potassium and sodium compounds, all having the general formula R2O, 3Al2O3, 4SO3, 6H2O.
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References
Scott, T. R., J. Metals, 14, 121 (1962).
Australian Patent App. No. 7496 (1961).
Newsome, J. W., et al., Tech. Paper No. 10 (Aluminium Co. of America, 1960).
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DAVEY, P., SCOTT, T. Formation of Alumina from a ‘Hydrogen’ Alunite. Nature 195, 376 (1962). https://doi.org/10.1038/195376a0
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DOI: https://doi.org/10.1038/195376a0
