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2 039 711

(13)

C1

(51)

IPC

(21) (22)

Application

5029052/26, 1992-02-25

(22)

Actual filing date

1992-02-25

(45)

Published

1995-07-20

(72)

Inventor

Zakharov V.I.Petrova V.I.

(73)

Holder

Institut Khimii I Tekhnologii Redkikh Ehlementov I Mineral'Nogo Syr'Ja Kol'Skogo Nauchnogo Tsentra Ran

METHOD FOR PRODUCTION OF COAGULANT Russian patent published in 1995 - IPC

Abstract RU 2039711 C1

FIELD: water purification. SUBSTANCE: coagulant is produced from nepheline-containing material treated with aqueous solution containing 1-170 g/l of free sulfuric or hydrochloric acid at temperature of 20-80 C and acid consumption equalling 50-85% of theoretically needed amount for reaction with acid-soluble components of initial material. Nepheline-containing material before acid treatment is ground to size of 120 mcm and smaller. When using pure solution of acid, solution contains 50-170 g/l of sulfuric or hydrochloric acid. Coagulant may also be prepared by treatment of nepheline with aqueous solution of aluminium of iron sulfate or chloride containing 1-100 g.l of free sulfuric or hydrochloric acid. Method allows production of complex reagent possessing coagulating, flocculating, turbidifying and neutralizing properties that increases its efficiency in water purification. EFFECT: higher efficiency. 4 cl, 2 tbl

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RU 2 039 711 C1

Authors

Zakharov V.I.

Petrova V.I.

Dates

1995-07-20—Published

1992-02-25—Filed

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