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Separation of Uranium Isotopes by Chemical Exchange

J. Shimokaua, F. Kojiro KOBAYASHI

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Abstract

The isotope separation effect between U(IV) complex and U(VI) ions was investigated in a mixed system of uranyl solution and cation exchange resin containing wranous ions. The columns were filled with the water slurry of the U(IV)-from resin particles. From the variation of the isotope abundance ratio 235U/238U of U(VI) in the effuent, it was found that (1) the apparent process of the isotope exchange under study is represented as more separate (2) the heavy uranium isotope are concentrated preferentially in the U(IV) complex ions; the equilibrium constant, K, is about 1.0005, independently of the experimental conditions. (3) the rate of isotope exchange is extremely sensitive to temperature.

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What this paper is about

The isotope separation effect between U(IV) complex and U(VI) ions was investigated in a mixed system of uranyl solution and cation exchange resin containing wranous ions. The columns were filled with the water slurry of the U(IV)-from resin particles. From the variation of the isotope abundance ratio 235U/238U of U(VI) in the effuent, it was found that (1) the apparent process of the isotope exchange under study is represented as more separate (2) the heavy uranium isotope are concentrated preferentially in the U(IV) complex ions; the equilibrium constant, K, is about 1.0005, independently of the experimental conditions. (3) the rate of isotope exchange is extremely sensitive to temperature.

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Available abstract

The isotope separation effect between U(IV) complex and U(VI) ions was investigated in a mixed system of uranyl solution and cation exchange resin containing wranous ions. The columns were filled with the water slurry of the U(IV)-from resin particles. From the variation of the isotope abundance ratio 235U/238U of U(VI) in the effuent, it was found that (1) the apparent process of the isotope exchange under study is represented as more separate (2) the heavy uranium isotope are concentrated preferentially in the U(IV) complex ions; the equilibrium constant, K, is about 1.0005, independently of the experimental conditions. (3) the rate of isotope exchange is extremely sensitive to temperature.

Key concepts: Uranyl, Chemistry, Isotope, Isotopes of uranium, Uranium, Kinetic isotope effect, Isotope separation, Radiochemistry

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