Method of producing a pure aluminiumoxide from solutions containing dissolved ions of aluminium and iron
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United States of America Patent
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Oct 27, 1981
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N/A
app pub date -
Feb 4, 1980
filing date -
Feb 13, 1979
priority date (Note) -
Expired
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Abstract
Method of producing aluminiumchloride with low contents of iron from solutions containing ions of aluminium and iron by precipitation of aluminiumchloride by means of hydrochloric gas where the solution from which the aluminiumchloride is precipitated contains at least 0.1 g Fe/l which solution has been formed by leaching of a natural mineral raw material or artifically produced aluminium-containing raw material by leaching with hydrochloric acid and/or sulphuric acid, respectively a mixture of such acids. The produced aluminiumchloride may be transformed to aluminiumoxide by calcination.
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