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本文研究了在硫酸和硝酸介质中伯胺N_(1923)对Ce(Ⅲ,Ⅳ)的萃取行为,以及在有氧化剂存在时,将Ce(Ⅲ)氧化成Ce(Ⅳ)的同时一步萃入伯胺有机相中,此法远较先氧化后萃取的方法简便。当KBrO_3用作氧化剂时,铈可被N_(1923)定量萃取,从La-Ce混合物中分离Ce获得了令人满意的结果。所得铈的纯度大于99.6%,回收率在90%以上。当过硫酸钾用作氧化剂时,氧化过程可为紫外光照催化;虽然目前只有50%的萃取率,但是光化学方法仍然是一个值得研究而饶有兴趣的问题。
In this paper, the extraction behavior of Ce (Ⅲ, Ⅳ) by primary amine N_ (1923) in sulfuric acid and nitric acid was investigated. In the presence of an oxidant, Ce (Ⅲ) was oxidized to Ce Amine organic phase, this method is far easier than the first oxidation after extraction method. When KBrO_3 was used as an oxidant, cerium was quantitatively extracted by N_ (1923) and satisfactory results were obtained by separating Ce from La-Ce mixture. The purity of the obtained cerium is more than 99.6% and the recovery rate is over 90%. When potassium persulfate is used as an oxidant, the oxidation process can be UV light catalysis; although only 50% of the extraction rate is present, photochemical methods are still a subject of considerable interest.