Methods for separating iron ions from aluminum ions
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United States of America Patent
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Oct 6, 2015
Grant Date -
Oct 9, 2014
app pub date -
Jun 4, 2012
filing date -
Jun 3, 2011
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Abstract
There are provided methods for separating iron ions from aluminum ions. For example, the methods can comprise providing a basic aqueous composition comprising said iron ions and said aluminum ions and having a pH of about 10.5 to about 13 and a temperature of about 50 ° C. to about 150 ° C.; reacting said basic aqueous composition with hematite so as to promote, catalyze and/or enhance formation of hematite and to obtain a liquid phase comprising said aluminum ions and a solid phase comprising said so-formed hematite generated with said iron ions; and separating said liquid phase from said solid phase.
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