C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/376, 362/40
C22B 7/00 (2006.01) B01D 15/00 (2006.01) B01J 47/02 (2006.01) C02F 1/28 (2006.01) G03C 5/395 (2006.01)
Patent
CA 1044471
ABSTRACT OF THE DISCLOSURE Heavy metal ions are recovered from a dilute aqueous solution by flowing the solution through either a single bed of ion-absorbing material in successive forward and reverse directions, or through a first bed of ion-absorbing material and thereafter through a second bed of ion-absorbing material in the reverse direction of flow. The reversal of flow is periodically to agitate mechanically a bed of ion-absorbing material to dislodge contaminants, such as gelatin. The method is accomplished, by using one enclosed vessel, or a pair of enclosed vessels, that have valves to control the direction of flow. A timing device preferably automatically reverses the direction of flow about each hour. After a relatively large number of reversals of flow the heavy metal ions are recovered from the ion-absorbing material and the same is regenerated in the process to again absorb ions from the dilute aqueous solution.
287845
Degenkolb David J.
Scobey Fred J.
de Luxe General
Na
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