钛水解沉淀物的溶解及钛中毒树脂的再生

DISSOLUTION OF HYDROLYZED TITANIUM PRECIPITATE AND REGENERATION OF RESIN POISONED BY TITANIUM

一、前言离子交换法分离铀同位素中,用Ti^(3+)作为UO_2^(2+)的还原剂。钛在该条件下水解成一白色二氧化钛沉淀物,甚至把离子交换树脂粘结成块,使树脂中毒。而二氧化钛对铀又是良好的吸附剂,它干扰谱带的形成和分离效果。通过反复试验,找出了一种溶解二氧化钛沉淀物,并再生离子交换树脂的方法。

The insoluble titanium dioxide which is produced from hydrolysis of Ti^(4+) canbe dissolved rapidly in hot solution containing 0.25 mol/1 NaOH and a definitequantity of H_O_2. A ion exchange resin poisoned by the titanium dioxide precipi-tate can be regenerated with 2 mol/1 HCl and above mentioned solution. Theperformance of resin regenerated did not change.