Oxidation process for production of acidic ferric sulphate

Details Oxidation process for production of acidic ferric sulphate Oxidation process for production of acidic ferric sulphate

1983-05-24

1985-03-26

Williams, Howard S.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C01G 4114

Patent

active

045072736

ABSTRACT:
Production of an acidic ferric sulphate from ferrous sulphate heptahydrate by drying the heptahydrate at a temperature within the range 40.degree. to 50.degree. C. and then at a temperature of from 54.degree. to 65.degree. C. to produce a partially dehydrated product containing from 3.8 to 5.2 mols H.sub.2 O prior to oxidizing at a temperature of 150.degree. C. to 300.degree. C. to produce a product containing at least 85% by weight of the ferrous iron converted to ferric iron. The oxidized product is treated with sulphuric acid to introduce at least 1.5:1 of SO.sub.4 :Fe.sup.3+. The product is eminently suitable for the treatment of domestic sewage.

REFERENCES:
patent: 1880265 (1932-10-01), Marsh et al.

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