Process for making pigmentary titanium dioxide
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United States of America Patent
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Issued Date -
Mar 20, 2008
app pub date -
Sep 18, 2006
filing date -
Sep 18, 2006
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Abstract
A process is disclosed for making pigmentary titanium dioxide through the oxidation of titanium tetrachloride in the presence of aluminum chloride, in which aluminum chloride solids are sublimed and combined with titanium tetrachloride gases and the combination oxidized in an oxidizer. Also, a process and apparatus for subliming aluminum chloride solids at least in part by conductive heat transfer from inert, thermally conductive solids in a fluidized bed.
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