摘要
研究了用 ５０ ｇ／ Ｌ（ Ｎ Ｈ４ ）２ Ｃ Ｏ３ 溶液从含 Ｕ 的 Ｔ Ｒ Ｐ Ｏ 相中反萃 Ｕ 的条件。测定了反萃平衡时间、相比、反萃次数、温度及有机相中 Ｕ 的质量浓度对反萃率的影响。用（ Ｎ Ｈ４）２ Ｃ Ｏ３ 反萃 Ｕ 比原流程的 Ｎａ２ Ｃ Ｏ３ 可减少 ２ 级，反萃液中不会析出（ Ｎ Ｈ４）２ Ｃ２ Ｏ４ 结晶。（ Ｎ Ｈ４）４［ Ｕ Ｏ２（ Ｃ Ｏ３）３ ］在加热转型时， Ｎ Ｈ＋４ 、 Ｃ Ｏ２－３ 及少量 Ｃ２ Ｏ２－４ 、 Ｎ Ｏ－３ 均可挥发除去。
The conditions for stripping uranium from TRPO phase are studied using 50 g/L (NH 4) 2CO 3 solution.The influence of the equilibrium time,phase ratio,back extraction times,temperature,as well as uranium concentration in TRPO phase on re extraction of uranium have been determined.Two stages of stripping process could be reduced when back extractant,Na 2CO 3,is replaced by (NH 4) 2CO 3 solution.The white crystal is not found in the aqueous solution.During the transformation of (NH 4) 4[UO 2(CO 3) 3] by heating NH + 4,CO 2- 3,C 2O 2- 4 as well as NO - 3 can be totally removed.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
1999年第2期115-118,共4页
Journal of Nuclear and Radiochemistry
