Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iib metal
Patent
1974-04-23
1976-09-28
Ozaki, G.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group iib metal
423146, 75108, 75120, 75121, C01G 906
Patent
active
039832104
ABSTRACT:
The process disclosed is for separation of iron from sulphuric acid acidified sulphate solutions containing zinc to be recovered and iron, the process comprising reacting such a solution at atmospheric pressure and at temperatures of 60 to 100.degree.C., preferably 85.degree.-95.degree.C., with a precipitating agent, in the form of a slurry or solid material containing Fe.sub.2 O.sub.3 or Fe(OH).sub.3 as an essential component. The precipitating agent optionally may be "red mud," a byproduct from the decomposition of bauxite. The precipitating agent may contain or have added thereto Al.sub.2 O.sub.3 and TiO.sub.2 which also contribute to the hydrolysis of the solution. The acid strength of the solution is adjusted to a pH of 1.0 - 2.5, preferably 1.4 - 1.7 by controlling additions of the said precipitating agent to the sulphate solution.
REFERENCES:
patent: 1834960 (1931-12-01), Mitchell
patent: 2871116 (1959-01-01), Clark
patent: 3295961 (1967-01-01), Colombo et al.
patent: 3434947 (1969-03-01), Steintveit
patent: 3574537 (1971-04-01), Tsai
patent: 3652264 (1972-03-01), Bodson
Det Norske Zinkkompani A/S
Ozaki G.
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