Solicitante: KRONOS INTERNATIONAL, INC
N. de publicación: US7968077 B2
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 TiO.sub.2 deposits, thereby achieving a better cooling performance, which produces a TiO.sub.2 pigment with a narrow particle size distribution.
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