Using compacted titanium dioxide pigment particles in the coolin

Details Using compacted titanium dioxide pigment particles in the coolin Using compacted titanium dioxide pigment particles in the coolin

1992-04-22

1993-11-30

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

423 77, 423613, C09C 136

Patent

active

052661083

ABSTRACT:
In the process for cooling the reaction products of the vapor phase oxidation of titanium tetrachloride to titanium dioxide comprising: (a) passing said reaction products through an externally cooled conduit, and (b) admixing with the reaction products particulate scrubbing material which removes solid deposits adhered to the interior walls of the conduit, the improvement characterized by:
using as the scrubbing material about 0.5-15 percent by weight, based on the weight of titanium dioxide, of compacted particles of titanium dioxide pigment, said compacted particles of titanium dioxide pigment being produced by subjecting titanium dioxide pigment to sufficient pressure to form same.

REFERENCES:
patent: 2488439 (1949-11-01), Schaumann
patent: 2488440 (1949-11-01), Schaumann
patent: 2559638 (1951-07-01), Krchma et al.
patent: 2721626 (1955-10-01), Rick
patent: 2833627 (1958-05-01), Krchma
patent: 2899278 (1959-08-01), Lewis
patent: 4784841 (1988-11-01), Hartmann et al.

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