Method for the recovery of silver from silver zeolite

Details Method for the recovery of silver from silver zeolite Method for the recovery of silver from silver zeolite

1985-03-05

1986-01-14

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 83, C22B 1100

Patent

active

045643911

ABSTRACT:
High purity silver is recovered from silver exchanged zeolite used to capture radioactive iodine from nuclear reactor and nuclear fuel reprocessing environments. The silver exchanged zeolite is heated with slag formers to melt and fluidize the zeolite and release the silver, the radioactivity removing with the slag. The silver containing metallic impurities is remelted and treated with oxygen and a flux to remove the metal impurities.
About 98% of the silver in the silver exchanged zeolite having a purity of 99% or better is recoverable by the method.

REFERENCES:
patent: 2218250 (1940-10-01), Reid
patent: 3892562 (1975-07-01), Miller
patent: 4406693 (1983-09-01), Heshmatpour et al.

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