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Application

97120780/25, 1997-12-10

(22)

Actual filing date

1997-12-10

(45)

Published

1999-05-20

(72)

Inventor

Gordienko P.S.Didenko N.A.Goncharuk V.K.Bakeeva N.G.Pashnina E.V.

(73)

Holder

Institut Khimii Dal'Nevostochnogo Otdelenija Ran

METHOD OF PREPARING TITANIUM DIOXIDE Russian patent published in 1999 - IPC

Abstract RU 2130428 C1

FIELD: chemical industry, more particularly preparation of titanium dioxide. SUBSTANCE: titanium fluoroammonium salt is dissolved in 10-30% hydrogen peroxide. H2O2:Ti molar ratio is 2-5. Alkaline treatment is carried out with ammonia solution. NH3:Ti molar ratio is 2-4.5. The resulting precipitate is subjected to pyrohydrolysis at 20-1000 C. Titanium fluoro ammonium salt is dissolved in the presence of 1-3 wt % alkaline vanadates, alkali metal bichromates, zinc compounds, magnesium, calcium, aluminium and antimony salts. EFFECT: higher purity, greater whiteness and dispersity of titanium dioxide. 5 cl, 3 ex

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RU 2 130 428 C1

Authors

Gordienko P.S.

Didenko N.A.

Goncharuk V.K.

Bakeeva N.G.

Pashnina E.V.

Dates

1999-05-20—Published

1997-12-10—Filed

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