Method and apparatus for recovery of heavy metal ions from dilut

Details Method and apparatus for recovery of heavy metal ions from dilut Method and apparatus for recovery of heavy metal ions from dilut

1978-09-25

1980-10-14

Lander, Ferris H.

Liquid purification or separation

Particulate material type separator, e.g., ion exchange or...

Selective units or compartments

210277, 210279, 210288, 137592, 137599, B01D 1504, B01D 1506, B01J 109

Patent

active

042280133

ABSTRACT:
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 directon of flow. The reversal of flow is to periodically mechanically agitate 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.

REFERENCES:
patent: 2993508 (1961-07-01), Wagner
patent: 3451554 (1969-06-01), Wade
patent: 3704785 (1972-12-01), Marsh
patent: 3747768 (1973-07-01), Barrera
patent: 3815747 (1974-06-01), Clack et al.

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