Branched alkylphosphinic and disubstituted phosphinic and phosphonic acids: effective synthesis based on α-olefin dimers and applications in lanthanide extraction and separation
作者:I. E. Nifant'ev、M. E. Minyaev、A. N. Tavtorkin、A. A. Vinogradov、P. V. Ivchenko
DOI:10.1039/c7ra03770h
日期:——
been found that phosphinic acids 8–12 surpass di(2-ethylhexyl)phosphoric acid (extractant P204) in non-selective Ln3+ extractability (Ln = La, Pr, Nd, Dy and Lu). Significantly higher selectivity for heavy lanthanide extraction (Ln = Dy, Lu), compared to that of P204, is achieved by using a minimal excess of disubstituted phosphinic acids 13–24. Acid 13, which contains two branched substituents, demonstrated
一些单烷基次膦酸的RCH 2 CH 2 CH(R)CH 2 P(O)(H)OH 8-12得到通过的相互作用α烯烃偏二聚体RCH 2 CH 2 C(R)CH 2 3- 7(R = ñ丁基,3,8 ;异丁基,4,9 ; ñ辛基,5,10 ;异丙基,6,11 ;环己基,7,12)用H 3 PO 2在90°C的异丙醇介质中。的Hydrophosphinylation 3由8或PhPO 2 ħ 2在140℃下导致二取代氨基酸13和14。烷基甲基次膦酸15-19和官能化烷基次膦酸20-22是通过单烷基次膦酸8-12的甲硅烷基醚与MeI,(2-氯甲基)吡啶,丙烯酸或丙烯酰胺相互作用而合成的。的非催化铝氢化3与随后的PCl相互作用3和氧化与SO 2氯2导致产生膦酸酐,其进一步用于获得烷基膦酸23和24。已经发现,在非选择性的Ln 3+萃取性(Ln = La,Pr,Nd,Dy和Lu)中,次膦酸8-12优于二(2-乙基己基)磷酸(萃取剂P