METHOD OF PREPARING TITANIUM DIOXIDE Russian patent published in 2000 - IPC

Abstract RU 2144904 C1

FIELD: chemical industry. SUBSTANCE: titanium tetrachloride is subjected to vapor phase oxidation with oxygen-containing gas in the presence of aluminium chlorides and silicon followed by microgrinding of the resulting product in steam-jet mill in the presence of 20-30% aqueous ammonia solution. Prior to microgrinding operation, tetraethoxy silane, or titanium tetrabutoxide, or polyalumoxanosiloxane or mixture thereof are added to titanium dioxide in amount of 0.3-6.0 % with respect to pigment weight at weight ratio with ammonia of 1:(0.001-1.6) calculated for 100% substance, and aqueous ammonia solution is used in amount of 0.3-2.0 % with respect to pigment weight. EFFECT: more efficient preparation method. 2 cl, 15 ex, 1 tbl

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RU 2 144 904 C1

Authors

Lenev L.M.

Stanovnova N.V.

Agafonov G.I.

Konotopchik K.U.

Bykov E.A.

Dates

2000-01-27—Published

1995-05-03—Filed