Influence of isooctanol on the interfacial activity and mass transfer of ytterbium(III) using 2‐ethylhexylphosphonic acid mono‐2‐ethylhexyl ester as an acidic extractant

Abstract

BACKGROUND: Introducing an adduct into an extractant system is an effective method of improving extraction performance. The effect of additives upon extraction is very important, especially in the case of interfacial behaviour. In most work published in the literature, there is little data on the interfacial behaviour of extractants and modifiers. As the mass transfer must pass through an interface, the influence of isooctanol on the interfacial activity and mass transfer of ytterbium(III) using 2-ethylhexylphosphonic acid mono-2-ethlhexyl ester has been investigated.

Extraction Behaviors of Heavy Rare Earths with Organophosphoric Extractants: The Contribution of Extractant Dimer Dissociation, Acid Ionization, and Complexation. A Quantum Chemistry Study

“…During the last 2 decades, various experimental studies − have been carried out to investigate the kinetics, thermodynamics, and mechanisms of HRE extraction and separation. The IR, NMR, dynamic interfacial tension, constant interfacial cell with laminar flow, and X-ray absorption fine structure (XAFS) measurements have been adopted; however, most of the results are empirical or semiempirical experimental conclusions.…”

Interaction-determined extraction capacity between rare earth ions and extractants: taking lanthanum and lutetium as models through theoretical calculations

“…At present, the research on extractant design and the interaction between extractant and REEs in extraction process is mostly experimental and technological. [40][41][42][43][44][45][46] However, theoretical research is very scarce to analyze the intrinsic structures at atomic and molecular levels, 33,[47][48][49] which is mainly due to the complexity of the rare earth extraction process and it is difficult to describe the subtle differences between REEs and extractants. In the process of extraction, static and dynamic processes are carried out simultaneously accompanied by the dissociation of the extractant dimer and the ionization of the monomer.…”