Obtaining aqueous solution from insoluble metal oxide

Details Obtaining aqueous solution from insoluble metal oxide Obtaining aqueous solution from insoluble metal oxide

1985-07-05

1987-02-24

Doll, John

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group viib metal

423DIG4, 423544, 423605, 75 2, 75101R, 75121, 75114, 75115, C01G 4500

Patent

active

046456503

ABSTRACT:
This method of obtaining an aqueous solution of metal values from an insoluble metal oxide is possible where the metal has a lower oxidation number in the solution than in the insoluble oxide, for example manganese (+2 and +4 respectively).
The oxide, such as MnO.sub.2, is treated with hot mineral acid such as HCl in the presence of coal. After some hours, the liquid comes to contain most of the manganese as dissolved Mn(II) ion.

REFERENCES:
Agarwal, J. C. et al, "Processing of Ocean Nodules: A Technical and Economic Review, J. of Mines, vol. 28, No. 4, Apr., 1976.

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