Recovery of boric acid from nuclear waste

Details Recovery of boric acid from nuclear waste Recovery of boric acid from nuclear waste

1983-04-06

1985-09-10

Padgett, Ben R.

Compositions

Radioactive compositions

252631, 252628, G21F 908, G21F 916

Patent

active

045405123

ABSTRACT:
Disclosed is a process for separating and recovering boric acid from water containing solids which include boric acid and radionuclides. In the first step, the water is separated from the solids by evaporation of the water at a temperature under 130.degree. F. In the second step, an alcohol selected from the group consisting of methanol, ethanol, propanol, isopropanol, and mixtures thereof is added to the remaining solids in the amount of at least 1.4 times that stoichiometrically required to react with the boric acid to form boron alkoxide and water to about 100 mole % in excess of stoichiometric. In the third step, the boron alkoxide is separated from the remaining solids by evaporation of the boron alkoxide. In the fourth step, water is added to the volatilized boron alkoxide to form boric acid and an alcohol. And finally, the alcohol is separated from the boric acid by evaporating the alcohol.

REFERENCES:
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patent: 4086325 (1978-04-01), Cordier et al.
patent: 4225390 (1980-09-01), Brown et al.
patent: 4257912 (1981-03-01), Fleischer et al.
patent: 4314877 (1982-02-01), Queiser et al.
patent: 4377507 (1983-03-01), Pope et al.
patent: 4379081 (1983-04-01), Rootham et al.
patent: 4409137 (1983-10-01), Mergan et al.
CRC Handbook of Chemistry and Physics, 53rd Ed. (1972-1973) p. D-29.

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