Solvent extraction of rare earth metals from nitrate solutions with di(2,4,4-trimethylpentyl)phosphinate of methyltrioctylammonium

Mutual diffusion diagram of liquid-liquid interfaces for morphological control of NaCl crystals

“…The liquid-liquid interface is a distinct reaction field, where different chemical reactions can occur at the solid-liquid and air-liquid interface. The liquid-liquid interface has played an important role in various industries in solvent extraction, liquid membrane separation, interfacial catalysis, and interface synthesis [6][7][8][9][10][11][12][13][14][15]. Recently, Wei et al reported selective recovery of metals using liquid-liquid extraction [8].…”

“…Recently, Wei et al reported selective recovery of metals using liquid-liquid extraction [8]. Beluva et al reported that Pickering interfacial catalysts show excellent catalytic performance in liquid-phase oxidation [9]. Furthermore, the formation of reaction intermediates or molecular assemblies that could not occur in the bulk phase has been observed [13][14][15].…”

Extraction of rare earth metals, uranium, and thorium from nitrate solutions by binary extractants

“…The extraction of REMs and uranyl nitrate by the binary extractants based on the derivatives of phos phinic acids and quaternary ammonium bases (QABs) was demonstrated in the previous studies [10][11][12][13][14][15][16]. The results have shown that these binary extractants are effective for the isolation and separation of REMs from chloride and particularly nitrate solutions [11,[13][14][15].…”

“…The results have shown that these binary extractants are effective for the isolation and separation of REMs from chloride and particularly nitrate solutions [11,[13][14][15]. In the studies [17,18] devoted to the extraction of some REMs by the binary extractants based on di (2 ethylhexyl)phosphoric acid and the salts of amines and QABs, it have been shown that, in these systems, the partition coefficients for the adja cent lanthanides can reach a value of ~2.6.…”

“…In previous studies [10][11][12][13][14][15][16], the binary extractant solutions (QAB salts with phosphinic acid derivatives) for extracting REMs and uranium were used in low concentrations (less than 0.05 mol/L). To investigate the distribution of the metals under these conditions and the possibilities of their separation, it was interest ing to study the extraction of REMs, uranium, and thorium by the more concentrated binary extractant solutions (≥0.5 mol/L).…”