Producing gypsum and magnetite from ferrous sulfate and separati

Details Producing gypsum and magnetite from ferrous sulfate and separati Producing gypsum and magnetite from ferrous sulfate and separati

1977-12-16

1979-01-30

Hearn, Brian

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

423146, 423161, 423166, 423152, 423632, 423DIG2, 423555, C01F 1146, C01G 4908

Patent

active

041372930

ABSTRACT:
Gypsum and magnetite which are both coarse and of good quality can simultaneously be produced by introducing calcium carbonate into an aqueous solution containing ferrous sulfate while an oxidizing gas is blown, and then carrying out a neutralizing and oxidizing operation at a pH of 5-6 and a temperature of 60-80.degree. C, and can be separately recovered by magnetic separation.

REFERENCES:
patent: 1894184 (1933-01-01), Loomis
patent: 3261665 (1966-07-01), Rathmell
patent: 3375066 (1968-03-01), Murakami et al.
patent: 3617562 (1971-11-01), Cywin et al.
patent: 3931007 (1976-01-01), Sugano et al.
patent: 3970738 (1976-07-01), Matsui et al.

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