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US 2015/0176103 A1Published application
Production of titanium dioxide pigments
OwnerZhigang Zak Fang, Scott Middlemas +1inventors
InventorsZhigang Zak Fang, Scott Middlemas, Peng Fang
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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.
Claims19
A process comprising:
- 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 comprising Ti4+,
- hydrolyzing the Ti4+ to form a hydrolyzed material comprising H2TiO3;
- calcining the hydrolyzed material;
- and
- recovering a TiO2 product.
4 more elements
Dependencies are inferred from the claim text.