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二(2-乙基己基)磷酸对轻稀土元素及钐-钕、铽-钆的萃取分离系数较大,是稀土萃取工艺中较普遍应用的一种酸性磷型萃取剂,但是它对中稀土(铕-钐,钆-铕)及重稀土(钇-钬、铒-钇)的萃取分离系数则不够大,而且具有萃取容量小、易乳化等缺点,因此寻找高选择性、高容量的新型萃取剂是稀土萃取化学研究的一项重要任务。为了了解二烷基磷酸分子中烷基结构对稀土元素萃取性能的影响,我们进行了二(2-乙基己基)磷酸(P-204)与二(1-甲基庚基)磷酸(P-215)对稀土元素某些萃取性能的比较。Peppard等在这方面曾做过一些工作,但他们对萃取分离系数和萃合物组成等问
Di (2-ethylhexyl) phosphoric acid is a kind of acidic phosphorous extractant which is more commonly used in the rare earth extraction process due to the large extraction and separation coefficient of light rare earth elements, samarium-neodymium and terbium-gadolinium. However, (Europium - samarium, gadolinium - europium) and heavy rare earth (yttrium - holmium, erbium - yttrium) extraction separation factor is not big enough, and has the extraction capacity is small, easy to emulsify other shortcomings, so looking for high selectivity and high capacity of the new Extractant is an important task in the research of rare earth extraction chemistry. In order to understand the influence of the alkyl structure of dialkylphosphoric acid molecules on the extraction performance of rare earth elements, we investigated the effects of di (2-ethylhexyl) phosphoric acid (P-204) and bis (1-methylheptyl) 215) Comparison of Some Extraction Properties of Rare Earth Elements. Peppard and others have done some work in this area, but they asked about the extraction and separation factor and the composition of the extract