Sulfate process
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United States of America Patent
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Sep 20, 2011
Grant Date -
Dec 17, 2009
app pub date -
Sep 6, 2007
filing date -
Sep 6, 2006
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Abstract
A sulfate process for producing titania from a titaniferous material (such as an iron-containing titaniferous material such as ilmenite) is disclosed. The process includes digestion and/or leach steps that form a process solution that includes an acidic solution of titanyl sulfate (TiOSO4) and iron sulfate (FeSO4) from the solid titaniferous material. The process also includes hydrolysis and other steps that form titania from the titanyl sulfate in the process solution. The process is characterised by a ferric ion treatment step of treating the process solution and lowering the concentration of ferric ions from the process solution.
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