Method of treating contaminated aqueous phosphoric acid solution

Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge

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2041415, C25F 302

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active

047494557

ABSTRACT:
Phosphoric acid solution used in the decontamination of radioactive metal articles is reacted with oxalic acid to precipitate the iron oxalate which is then pyrolyzed to form a mixture of oxides in small volume for storage as a radioactive waste. The solution from which the oxalate is removed is evaporatively concentrated and reused for decontamination.

REFERENCES:
patent: 4615776 (1986-10-01), Sasaki
patent: 4701246 (1987-10-01), Fujita

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