Method for protecting an ion-exchange resin from chemical poison

Details Method for protecting an ion-exchange resin from chemical poison Method for protecting an ion-exchange resin from chemical poison

1978-11-24

1981-10-20

Miller, Edward A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 17, 299 4, 210682, C01G 4300

Patent

active

042960754

ABSTRACT:
A method for protecting an ion-exchange resin in a uranium and/or related values recovery operation from poisoning by polythionates contained in the leach solution. A guard chamber containing a catalytic material is positioned in the leaching circuit upstream of the resin so the leach solution will pass through the catalytic material before it contacts the resin. The catalytic material, e.g. activated carbon, converts the polythionates to non-poisoning thiosulfates, sulfites, and water which offer no poisoning threat to the resins. An oxidant, e.g. oxygen, is added to the leach solution before it passes through the catalytic material to speed up the catalytic reaction.

REFERENCES:
patent: 4098691 (1978-07-01), Filby
patent: 4108722 (1978-08-01), Stover
patent: 4155982 (1979-05-01), Hankin et al.
patent: 4200337 (1980-04-01), Jackovitz et al.

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