Application of ionic liquid based on Aliquat 336 and D2EHPA in the extraction of transition metals

Abstract

To date, there are a number of methods for selective extraction of transition metal ions based on liquid-liquid extraction. One of the most interesting methods of metal ions extraction is liquid-liquid extraction with application of ionic liquids based on quaternary ammonium bases and organic acid residues, in particular, organophosphorus, diluted with organic solvent (toluene, xylene, kerosene, etc.). However, using of organic solvents does not correspond to the modern tendencies of harmful effects on the environment reducing. Thus, we propose to use Aliquat 336 and D2EHPA-based ionic liquid for extraction of transition metal ions in ecologically safe aqueous two-phase system based on polypropylene glycol 425 and sodium chloride. Di(2-ethylhexyl) phosphate trioctylmethylammonium has been shown to yield more than 80% Fe(III) and Y(III) ions.

Kenya’s Mineral Landscape: A Review of the Mining Status and Potential Recovery of Strategic and Critical Metals through Hydrometallurgical and Flotation Techniques

“…Given their nearly non-volatile nature, low melting point, low flammability, thermal stability, and high ionic conductivity, ionic liquids (ILs) are usually regarded as environmentally friendly solvents and have attracted significant interest. In the extraction of both organic and inorganic materials, ILs made from quaternary ammonium bases and organic acid moieties are frequently utilized [66]. The benefits of ILs, such as high thermal stability and designability, could potentially be introduced through the use of ILs in the solvent extraction of REEs [67].…”

“…Due to coordination interactions with moieties of organic and inorganic acids, REEs can produce complex anions (like other metals of side groups). The separation of REEs utilizing an IL based on phosphoric acid and an organic base is represented by Equation ( 5) [66]:…”

Optimizing the method for removing MSNs templates using an ionic liquid ([C4mim]Cl)

“…At present, the IL-DLLME technique is mainly applied to the extraction of biological samples, such as saliva [35], blood [36], urine [37], and food analysis; for example, it is used in the separation of polychlorinated biphenyls (PCBs) and acrylamide from milk and coffee samples [38]. ILs as extractants are also widely used in the hydrometallurgical industry; examples include extracting alkali metals [39,40], alkaline earth metals [41], heavy metals [42][43][44], and transition metals [45]. Plastic is ubiquitous in our lives and poses a clear danger to organisms when released into the environment as a waste product; this represents one of the most pressing ecological issues at present [46][47][48].…”