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2 089 503

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C1

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IPC

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Application

95106920/25, 1995-05-10

(22)

Actual filing date

1995-05-10

(45)

Published

1997-09-10

(72)

Inventor

Sereda B.P.Panjushkin V.R.Ponomareva E.S.Tselishcheva S.V.Volkomorov A.I.Korobejnikov E.A.Rulev E.I.Koltyshev E.M.Kominova L.V.Kryl'Tsov E.V.Kisil' Ju.K.Reshetnikov B.S.

(73)

Holder

Tovarishchestvo S Ogranichennoj Otvetstvennost'Ju

METHOD OF PRODUCING COAGULANT - ALUMINIUM HYDROXOCHLORIDE Russian patent published in 1997 - IPC

Abstract RU 2089503 C1

FIELD: chemical technology, water treatment. SUBSTANCE: aluminium sulfate in an aqueous solution is treated with calcium hydroxochloride or chlorocarbonate up to preparing the end product of medium basicity followed by separation of the end product solution from calcium sulfate precipitate. The latter is subjected for an aqueous-acid treatment using sulfuric or hydrochloric acid. Treatment is carried out for 0.5-1 h at mass ratio liquid : solid = 1.5-(1.0:1.0), at pH medium value 0.8-2.0. The obtained washing water is fed to preparing the parent reagents and for an aqueous-acid treatment of calcium sulfate precipitate. The end product is used for sewage treatment. EFFECT: improved method of producing. 4 cl

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RU 2 089 503 C1

Authors

Sereda B.P.

Panjushkin V.R.

Ponomareva E.S.

Tselishcheva S.V.

Volkomorov A.I.

Korobejnikov E.A.

Rulev E.I.

Koltyshev E.M.

Kominova L.V.

Kryl'Tsov E.V.

Kisil' Ju.K.

Reshetnikov B.S.

Dates

1997-09-10—Published

1995-05-10—Filed

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