Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound
Patent
1975-12-31
1978-01-24
Stern, Edward
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
423491, 423493, 423554, 423555, C01G 106, C01F 1146, C01G 4910
Patent
active
040704378
ABSTRACT:
In a process for the recovery of metal chlorides from jarosite in sludges which result from the sulphuric acid processing of ores, the sludge is treated with an aqueous solution of an alkaline earth metal chloride. This solution contains free hydrochloric acid and is in excess stoichiometric ratio to the sulphate content of the sludge. The insoluble materials are separated from the metallic chloride solution by filtering, and are stripped of metallic chlorides by washing and further filtering. The metallic chloride solutions are then collected. The alkaline earth chloride is preferably calcium chloride. The process is particularly, but not exclusively, applicable to recovering metals from jarosite-type sludge resulting from the processing of zinc ore.
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Compagnie Royale Asturienne des Mines
Stern Edward
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