Method for increasing the MnO.sub.2 content of natural manganese

Details Method for increasing the MnO.sub.2 content of natural manganese Method for increasing the MnO.sub.2 content of natural manganese

1977-03-30

1978-05-16

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group viib metal

75 1R, 75 2, 423 1, C01G 4502

Patent

active

040899284

ABSTRACT:
An active natural manganese dioxide mineral for use in dry battery cells is produced from a natural manganese dioxide ore by reacting the ore or a preconcentrate thereof with a solution of an acid. The acid reacts with the carbonates, such as calcium carbonate, to produce water-soluble salts which are then washed away. The resultant mineral can have an MnO.sub.2 content of 80% by weight or more.

REFERENCES:
patent: 1143828 (1915-06-01), Isherwood
patent: 1448110 (1923-03-01), Olameta
patent: 1959448 (1934-05-01), Staufer et al.
patent: 2667405 (1954-01-01), Muller et al.
patent: 3025131 (1962-03-01), Lerner
patent: 3780159 (1973-12-01), Welsh
patent: 3864118 (1975-02-01), Sehumacher et al.

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