Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1975-10-02
1977-02-01
Wyse, Thomas G.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 53, C02B 126
Patent
active
040060802
ABSTRACT:
A process for the treatment of aqueous sulphuric acid solutions of a metal salt or salts containing ferrous sulphates wherein the pH value of the solution is adjusted by the addition of a calcium compound to selectively precipitate calcium sulphate after which the precipitated calcium sulphate is separated and calcined before adjusting the pH of the mother liquor to a value in the range 7 to 9 by the addition of a calcium-containing compound to precipitate there from solid metal compounds which are then separated and/or calcined.
REFERENCES:
patent: 1310382 (1919-07-01), Auld et al.
patent: 3800024 (1974-03-01), Forsell et al.
Spurgeon Peter
Twist Walter
Tioxide Group Limited
Wyse Thomas G.
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