PRODUCTION OF TITANIUM DIOXIDE PIGMENTS
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United States of America Patent
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Jun 25, 2015
app pub date -
Dec 28, 2011
filing date -
Dec 28, 2011
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Abstract
A process includes roasting a TiO2-containing material in the presence of an alkaline material to form a roasted product; leaching the roasted product with an acidic solution to form a leach liquor; extracting the leach liquor with an extractant to form a raffinate including a Ti4+ species; hydrolyzing the Ti4+ species to form a hydrolyzed material that includes H2TiO3; calcining the hydrolyzed material; and recovering a TiO2 product.
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