Metal-containing waste water treatment and metal recovery proces

Details Metal-containing waste water treatment and metal recovery proces Metal-containing waste water treatment and metal recovery proces

1986-08-19

1988-07-12

Fisher, Richard V.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210675, 210678, 210682, 210688, C02F 142

Patent

active

047568330

ABSTRACT:
A process is described involving the detoxification of waste water containing heavy metals which includes recovering the metals in salable form. The metals are removed from the waste water by contacting the water with an ion exchange resin bed contained in a portable canister until it is determined that the resin is saturated with metal. This determination is made by measuring the appearance of heavy metal salts in the effluent from the canister. Regeneration of the resin and recovery of the metal is accomplished in a location diverse to that where the metal is removed from the waste water by (a) back washing the resin with water into a backwashing receiver (b) forward washing the resin with water (c) forward washing the resin with a regenerating solution (d) collecting the regenerating solution in a plurality of fractions wherein the first fractions contain the majority of the metal recovered and (e) forward washing the resin with water to remove excess regenerating agent.

REFERENCES:
patent: 1745421 (1930-02-01), Higgins
patent: 2572082 (1951-10-01), Welsh
patent: 4001113 (1977-01-01), Schoenrock e al.
patent: 4329210 (1982-05-01), Merchant et al.
patent: 4335000 (1982-06-01), Grier et al.
patent: 4372830 (1983-02-01), Law

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