METHOD OF REUSING ACIDIC IRON-CONTAINING SOLUTIONS Russian patent published in 1998 - IPC

Abstract RU 2110488 C1

FIELD: waste water treatment. SUBSTANCE: reused are iron-containing both high- concentration etching and low-concentration wash and waste waters. Exhausted acidic iron-containing solutions are treated by metalworking wastes. To thus neutralized solution, precipitation agent is added Ц phosphate ion-containing compound at pH 6.0-8.0 at stoichiometric ratio of phosphate ions to cations of metal to be precipitated. Precipitate is separated and filtrate returned into production process. Precipitates can be utilized in preparing pigment pasts. EFFECT: increased degree of iron removal. 4 cl

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RU 2 110 488 C1

Authors

Rosljakova N.G.

Konorev B.P.

Rosljakov A.O.

Rosljakov R.O.

Dates

1998-05-10—Published

1996-06-17—Filed