Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1978-09-19
1979-07-03
Hearn, Brian
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
423 24, 423 42, 423 54, 423139, C01G 500, C25C 120, C01G 3714, C01G 4900
Patent
active
041599306
ABSTRACT:
A process for treating very dilute solutions containing ecologically noxious heavy metal ions, in which the solutions are made acceptable for return to the environment, and the typically valuable heavy metal present in the solution is recovered at an economic profit. The dilute solution is flowed through an ion exchange resin, as a cross-linked polystyrene having quaternary ammonium functional groups which hold the heavy metal ions, allowing an ecologically benign effluent to return to the environment or the water to be re-used in industrial processing. Typically, an alkali metal halide is subsequently placed in contact with the resin to recover the heavy metal ion for subsequent reduction to a solid.
REFERENCES:
patent: 2839389 (1958-06-01), Kember et al.
patent: 2965441 (1960-12-01), Welton
patent: 3664950 (1972-05-01), Saraceno et al.
patent: 4049772 (1977-09-01), Takada
Lindeman et al., "Wiedergewinnung von Silber aus verdunnten photographischen Fixierbadlosungen", Chem. Techn. 11, pp. 147-149.
Degenkolb David J.
Scobey Fred J.
De luxe General, Incorporated
Hearn Brian
Lubcke Harry R.
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