Process for recovering manganese from aqueous acidic sulphate so

Details Process for recovering manganese from aqueous acidic sulphate so Process for recovering manganese from aqueous acidic sulphate so

1978-08-29

1980-04-15

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group viib metal

423101, 423140, 423 52, 423544, 423558, C01G 4500, C01G 906

Patent

active

041983777

ABSTRACT:
The present invention relates to a process for the recovery of manganese from aqueous acidic solution.
The process comprises the steps of, (a) introducing into the solution peroxymonosulphuric acid (PMS) in a plurality of stages, normally from 2 to 6, often in the range of from 110 to 160% of the amount theoretically needed to oxidise the manganese to the Mn (IV) oxidation state, (b) introducing from 100 to 133% of the theoretical amount of neutralising agent to neutralise the PMS introduced in step (a), preferably in a single addition and prior to the introduction of the second stages of PMS and, (c) separating precipitated manganese salt from solution. The demanganisation reaction is preferably carried out at a temperature of above 60.degree. C. usually in the range of 70.degree. to 90.degree. C.
An aqueous acidic manganese-containing solution can be obtained by leaching ores or scrap metal with strong mineral acids. The present invention is particularly suitable for the purification of zinc sulphate solution.

REFERENCES:
patent: 4067789 (1978-01-01), Harris et al.
patent: 4096233 (1978-06-01), Bodson
patent: 4156711 (1979-05-01), Bodson

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