Acid/microwave leaching of titanium ore and then flotation to recover titanium oxide concentrate
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United States of America Patent
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Oct 13, 2009
Grant Date -
Feb 3, 2005
app pub date -
Oct 8, 2002
filing date -
Oct 12, 2001
priority date (Note) -
Expired
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Abstract
A process of producing 99% plus titanium dioxide product by using conventional and microwave heating and leaching of the titanium compound feedstock using acid and oxidants. The solid residue from the leaching is used to produce the high quality titanium oxide by froth flotation. Hydrochloric acid can be recovered by multi-stage evaporation. The process can be modified to produce nano-size titanium dioxide product.
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