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2 175 989

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C1

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IPC

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Application

2001106539/02, 2001-03-14

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Start date

2001-03-14

(22)

Actual filing date

2001-03-14

(45)

Published

2001-11-20

(72)

Inventor

Gerasimova L.G.Nikolaev A.I.Sklokin L.I.Shestakov S.V.Poljakov E.G.Zots N.V.

(73)

Holder

Zakrytoe Aktsionernoe Obshchestvo

METHOD OF PROCESSING FLUOROTITANIUM-CONTAINING SOLUTIONS AFTER EXPOSURE OF LOPARITE AND OTHER TITANIUM-CONTAINING CONCENTRATES USED IN TITANIUM DIOXIDE PRODUCTION Russian patent published in 2001 - IPC

Abstract RU 2175989 C1

FIELD: mining industry. SUBSTANCE: method includes high-temperature (500-700 C) pyrolysis of concentrated solution of fluorotitanic acid. Before pyrolysis, aluminum metal is added in quantity 0.15-1.5% of the weight of titanium dioxide in solution. Pyrolysis product is first treated with lime milk to pH 6.5-7.0 and then modified by silica gel at its weight ratio to titanium dioxide in solution 1:(0.01-0.1). Another novelty consists in that pyrolysis product, prior to be treated with lime milk, is unpulped in water at solids-to-liquid ratio 1:3 and stirred for 1.5-2.0 h at 40-50 C. EFFECT: enhanced pigment characteristics of titanium dioxide. 3 cl, 3 ex

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RU 2 175 989 C1

Authors

Gerasimova L.G.

Nikolaev A.I.

Sklokin L.I.

Shestakov S.V.

Poljakov E.G.

Zots N.V.

Dates

2001-11-20—Published

2001-03-14—Filed

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