Removal of thorium from raffinate

Details Removal of thorium from raffinate Removal of thorium from raffinate

1989-12-27

1990-07-24

Rosenberg, Peter D.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

C22B 300

Patent

active

049433180

ABSTRACT:
Thorium is removed from raffinate effluent by pre-washing with odorless kerosene to remove organic contaminants, followed by solvent extraction counter-currently with tri-n-octylphosphine oxide in odorless kerosene. The loaded solvent from the solvent extraction is back-washed with K.sub.2 CO.sub.3 solution at about 60.degree. C., and subsequent lime addition precipitates Th(OH).sub.4.

REFERENCES:
patent: 3909247 (1975-09-01), Paris
patent: 4265861 (1981-05-01), Cleary

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