摘要
对独居石苛性钠浸出，盐酸优溶产生的优溶渣的硫酸浸出液，用叔胺Ｎ２３５萃取铀分离钍及稀土进行了研究。结果表明：铀的萃取率大于９９．５％，反铀液中ＴｈＯ＿２／Ｕ为（１．８～３．８）×１０￣（－３），ＲＥ＿ｘＯ＿ｙ／Ｕ为（１．０～１．６）１０￣（－３），萃铀余液中的Ｕ／ＴｈＯ＿２仅为（３．５～５．６）×１０￣（－５）。
Monazite is leached by caustic soda. The leached residue isselectively dissolved by HCl with obtained 'selectively dissolved'residue. The later subjects to H_2SO_4 leaching and extraction. This paperdesert bes the results of study on the extraction of U from the H_2SO_4 leached solution with tertiary amine N235 for the separation from Thand rare earth. The results show that >99.5% uranium extraction yieldis obtained and ThO_2/U in the stripped U solution is (1.8-3.8) × 10￣(-3),RE_xO_y/U is (1.0-1 .6) ×10￣(-3) while U/ThO_2 in U raffinate is only(3.5-5. 6) × 10￣(-6).
出处
《稀有金属与硬质合金》
CAS
CSCD
1996年第1期4-7,共4页
Rare Metals and Cemented Carbides
关键词
优溶渣
叔胺N235
萃取
铀
钍
稀土
selectively-dissolved residue, extraction with N235 tertiary.amine, U, Th rare earths
