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The extraction behavior of N,N′ diethyl N,N′ dibenzenyl urea (DEDBU) to Uranium? and Thorium? from nitric acid solution was studied by using xylene as diluent. The effects of aqueous HNO3 concentration and extractant concentration on the extraction distribution ratio of U? and Th? were studied, and the results show that the extraction behavior of the extractant to U? is similar to tributyl phosphate (TBP), the solvation numbers for DEDBU and TBP are two, respectively. Under the experiment condition, the extractant does not show the extraction behavior to Th?, this result exhibits that the extractant has good application to separate U? and Th?. The crystal structure of the complex UO2(NO3)2[CH2(CH2)2CONC8H17]2 was determined by single crystal X ray diffraction. Crystal data: C24H46N4O10U, triclinic, space group , a = 8.662(2)?, b = 10.07(2)?, c = 10.895(3)?, α = 103.77(2)°, β = 92.01(2)°, γ = 96.23(2)°, V = 915.7(4)?3, Mr = 934.78, Z = 1, Dc = 1.695 g·cm-3, F(000) = 462, μ = 4.495mm-1, R= 0.0250, wR = 0.0591, observed reflections 3566 (I >2σ(I)).The central uranyl ions is coordinated by six oxygen atoms, two of them are from the carbonyl groups of N,N′ diethyl N,N′ dibenzenyl urea molecules, and the other four are from two nitrate groups.
The extraction behavior of N, N ’diethyl N, N’ dibenzenyl urea (DEDBU) to Uranium® and Thorium® from nitric acid solution was studied by using xylene as diluent. The effects of aqueous HNO3 concentration and extractant concentration on the extraction distribution ratio of U? and Th? were studied, and the results show that the extraction behavior of the extractant to U? is similar to tributyl phosphate (TBP), the solvation numbers for DEDBU and TBP are two, respectively. Under the experiment condition, the extractant does not show the extraction behavior to Th ?, this result exhibits that the extractant has good application to separate U? and Th ?. The crystal structure of the complex UO2 (NO3) 2 [CH2 (CH2) 2CONC8H17] 2 was determined by a = 8.672 (2) ?, b = 10.07 (2) ?, c = 10.895 (3) ?,? = 103.77 (2) °,? = 92.01 (2) °, γ = 96.23 (2) °, V = 915.7 (4) 3 3, Mr = 934.78, Z = 1 and Dc = 1.695 g · cm- = 462, μ = 4.495 mm -1, R = 0.0250, wR = 0.0591, observed reflections 3566 (I> 2σ (I)). The central uranyl ions are coordinated by six oxygen atoms, two of them from the carbonyl groups of N, N ’diethyl N, N’ dibenzenyl urea molecules, and the other four are from two nitrate groups.