Removal and recovery of silver from waste stream

Details Removal and recovery of silver from waste stream Removal and recovery of silver from waste stream

1986-12-04

1988-05-17

Stoll, Robert L.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75108, 423 42, 210684, 210686, 210688, 210702, C22B 1104

Patent

active

047448253

ABSTRACT:
In accordance with the invention, an improved process is provided for the efficient removal and recovery of silver from an impure solution containing silver ions which comprises contacting the silver-containing solution with an activated alumina adsorbent to selectively adsorb the silver ions from the solution and the lower the subsequent effluent discharge to less than 1 ppm silver, treating the activated alumina with a regeneration fluid to recover the silver ions from the adsorbent, and reducing the recovered silver ions to metallic silver.

REFERENCES:
patent: 1234390 (1917-07-01), Renwick et al.
patent: 1234391 (1917-07-01), Renwick et al.
patent: 2614029 (1951-02-01), Moede
patent: 3073675 (1963-01-01), Leum et al.
patent: 3382034 (1968-05-01), Kraus
patent: 3840365 (1974-10-01), Hammes, Sr. et al.
patent: 4082546 (1978-04-01), Wallace
Sitting, Marshall, ed., "Priority Toxic Pollutants: Health Impacts and Allowable Limits", Noyes Data Corporation, Park Ridge, NJ, 1980, pp. 2-3.

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