PREPARATION OF CARRIER-FREE Ra-228 (MsTh$sub 1$) AND Ac-228 (MsTh$sub 2$) BY ION EXCHANGE

Journal Article · Sat Dec 01 00:00:00 EST 1962 · Mag. Tud. Akad. At. Kut. Int. (Debrecen), Kozlemen

OSTI ID:4722870

Bruecher, E

An ion-exchange process was developed for the production of carrier-free Ra/sup 228/ and Ac/sup 228/ . The Ra/sup 228/ was produced from old Th(NO/sub 3/ )/sub 4/. After a tributyl phosphate extraction of about 95% of the Th, the residuals were separated from the Ra/sup 228/ on a Dowex 50 x 8 cation-exchange column in 0.5M NH/sub 4/-lactate solution. In the cation-exchange column, the Ra/ sup 228/ was bound. Rare earth impurities were removed from the column through elution by 0.7M NH/sub 4/-lactate The Ra/sup 228/ was eluated by 3M HNO/sub 3/ and after the solution was concentrated by evaporation, it was transferred through a 0.5 ml 0.05N HCl solution on a 0.3 x 8 cm cation-exchange column filled with Dowex 50 x 12 400 mesh resin. The Ac/sup 228/ can be regularly eluted from the column by 0.65M NH/sub 4/-lactate, since under such conditions the adsorption zone of the Ra/sup 228/ is shifting at a very low rate and the decomposition products Th/sup 228/, Pb/sup 212/, and Bi/sup 212/ are eluated in precedence to the Ac/sup228/. After acidification, the NH/sub 4/-lactate solution containing the Ac/sup 228/ was carried over to a cation-exchange column from which first the Pb/sup 212/ and B/sup 212/ were eluted through 2N HCl, and then the Ac/sup 228/ was eluted through 7N HCl. The radioactive contamination of Ac/sup 228/ amounts to 0.2%, and its yield is 70 to 80% related to the initial Ac/sup 228/ content of Th(NO/sub 3/)/sub 4/. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-020073
• OSTI ID: 4722870
• Journal Information: Mag. Tud. Akad. At. Kut. Int. (Debrecen), Kozlemen, Vol. Vol: 4; Other Information: Orig. Receipt Date: 31-DEC-63
• Country of Publication: Country unknown/Code not available
• Language: Hungarian

Related Subjects

CHEMISTRY
ACTINIUM 228
AMMONIUM COMPOUNDS
BISMUTH 212
BUTYL PHOSPHATES
BUTYL RADICALS
DECOMPOSITION
DOWEX
EVAPORATION
HYDROCHLORIC ACID
IMPURITIES
ION EXCHANGE
ION EXCHANGE MATERIALS
LACTIC ACID
LEAD 212
NITRIC ACID
ORGANIC ACIDS
PREPARATION
RADIUM 228
RARE EARTHS
SOLUTIONS
SOLVENT EXTRACTION
THORIUM 228
THORIUM NITRATES