SEPARATION OF N_p FROM U AND Pu WITH n-BUTYRALDEHYDE AS REDUCER FROM TBP/OK Ⅰ. STUDIES OF STRIPPING Np(Ⅵ) IN ORGANIC PHASE OF TBP/OK WITH AQUEOUS HNO 3 SOLUTION IN PRESENTING n BUTYRALDEHYDE

The studies of facts effecting on stripping Np from organic phase with HNO 3 and the determinations of Np in the stripping extractor with the reducer of n butyraldehyde are carried out. It is show that the concentration of n butyraldehyde, neptunium, uranium and HNO 3, ratio of phases effect the stripping of Np in the cascade, i.e. increasing the concentration of U and C 3H 7CHO and extending the period of interaction Np with C 3H 7CHO, the stripping ratio of Np is improving and it is reasonable for adding of C 3H 7CHO into the extractor at 2nd stage, and the amount of Np in the 1BW is less than 10 %.