Manganese removal from aqueous industrial waste effluents

Details Manganese removal from aqueous industrial waste effluents Manganese removal from aqueous industrial waste effluents

1986-05-05

1987-11-17

Hruskoci, Peter

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210726, 210912, 210915, 134 28, C02F 152

Patent

active

047072733

ABSTRACT:
A chemical treatment for the removal for manganese or manganese and fluoride from an aqueous waste effluent obtained from the acid-fluoride washing or alkali (non-fluoride) washing in a step in the manufacture of aluminum cans. The treatment consists of adding in an acid medium sufficient phosphate ion to react with the manganese and/or fluoride and thereafter adding in an alkali medium sufficient calcium ion to react with the manganese, phosphate and/or fluoride. The ratio of phosphate to calcium ion added is 3:1 to 1:2.5.

REFERENCES:
patent: 3311447 (1967-03-01), Stuart
patent: 3575853 (1971-04-01), Gaughan et al.

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