Solvent extraction of rare earth elements with mixtures of sec-octylphenoxy acetic acid and bis(2,4,4-trimethylpentyl) dithiophosphinic acid

Extraction of lanthanide ions from aqueous solution by bis(2-ethylhexyl)phosphoric acid with room-temperature ionic liquids

“…There are various types of processes available such as solvent extraction, membrane separation, chemical absorption, and distillation to remove or recover the rare earth elements [1,2]. Among these processes, in liquid-liquid solvent extraction, which is the most widely adopted type for the removal of metals, metal ions are separated based on the principle of ionic species (anions or cations) transportation according to the differences in the chemical potentials between the aqueous phase and the organic phase [3][4][5]. The selection of an appropriate solvent is determined by such factors as the solvating power, selectivity, chemical stability, flammability, and toxicity.…”

Extractants for rare earth metals

“…For selectivity, they are largely inferior to crown-ethers and calixarenes. However, the ability of organophosphorous compounds to synergistic extraction of cations causes for further study [42].…”

“…По селективности они во многом уступают краун-эфи-рам и каликсаренам. Однако способ-ность органофосфорных соединений к синергетической экстракции катионов служит причиной для дальнейшего их изучения [42].…”

Adsorption behavior of indium(III) on modified solvent impregnated resins (MSIRs) containing sec-octylphenoxy acetic acid

“…The adsorption mechanism with CA-12 has been investigated in liquid-liquid extraction (Jia et al, 2009;Tian et al, 2012). Kinetic models can be helpful to understand the mechanism of metal adsorption and evaluate performance of the adsorbents for metal removal.…”