Method of disposing of a ferrous-ion containing acidic aqueous w

Details Method of disposing of a ferrous-ion containing acidic aqueous w Method of disposing of a ferrous-ion containing acidic aqueous w

1974-09-16

1978-10-10

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 52, 210 56, 423DIG2, C02C 504

Patent

active

041195361

ABSTRACT:
On disposing of an acidic aqueous waste including ferrous ions, the ferrous ions are oxidized to produce iron compound precipitate in a remaining waste liquid. With the temperature of the waste kept between 50.degree. C and 75.degree. C and with pH of the waste liquid adjusted between 3.5 and 5.2, fine particles of the iron compound otherwise produced agglomerate into large polycrystalline particles. The large particles are readily separated from the waste liquid, which is now substantially neutral and transparent.

REFERENCES:
patent: 2433458 (1947-12-01), Kahn et al.
patent: 2692229 (1954-10-01), Heise et al.
patent: 3167390 (1965-01-01), Simpson et al.
patent: 3617559 (1971-11-01), Cywin
patent: 3617560 (1971-11-01), Deul
patent: 3647686 (1972-03-01), Gunnarsson
patent: 3743707 (1973-07-01), Iwase et al.
patent: 3822210 (1974-07-01), Iwase et al.
Pollutant Removal Handbook, p. 430-438.

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