Production of titania
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United States of America Patent
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Feb 5, 2008
Grant Date -
Aug 18, 2005
app pub date -
Apr 15, 2005
filing date -
Oct 17, 2003
priority date (Note) -
Expired
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Abstract
A sulfate process for producing titania from titaniferous material is disclosed. The process includes precipitating titanyl sulfate from leach liquors containing acidic solutions of titanyl sulfate. The process is characterised by: (a) multiple stage leaching to produce leach liquors containing acidic solutions of titanyl sulfate; (b) using depleted leach liquor from a titanyl sulfate precipitation reactor in the leach steps; and (c) controlling acid concentration in the leach steps to avoid premature hydrolysis and premature precipitation.
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