Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2011-06-28
2011-06-28
Hendrickson, Stuart (Department: 1736)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S069000
Reexamination Certificate
active
07968077
ABSTRACT:
A method for manufacturing titanium dioxide by reacting titanium tetrachloride with an oxygen-bearing gas in a tubular reactor and subsequently cooling the titanium dioxide particle/gas mixture in a cooling section, where the gas/particle flow is caused to rotate. Titanium tetrachloride is introduced in the cross-sectional plane of the reactor, but not in the radial direction, whereby the flow velocity of the oxygen-bearing gas is more than 20 m/s. Scrub solids free the inner wall of the reactor and the reactor cooling section of TiO2deposits, thereby achieving a better cooling performance, which produces a TiO2pigment with a narrow particle size distribution.
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Gruber Rainer
Malcharek Frank
Hendrickson Stuart
Kronos International, Inc.
Locke Lord Bissell & Liddell LLP
Rump Richard M
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