Solvent extraction of metals: Role of ionic liquids and microfluidics

Ionic Liquids as Components of Systems for Metal Extraction

“…A benefit of this study was the optimization of a number of extraction parameters: extractant concentration, acidity, and salinity. In addition, using data from UV, IR, and 13 C NMR spectroscopy of the extractant and the extracted species, it was found that the extraction of gold(III) proceeds according to the anion-exchange mechanism in accordance with the scheme:…”

“…For example, it was demonstrated [13] that ionic liquids increase the efficiency and selectivity of metal extraction by several orders of magnitude. The potential of ILs as more environmentally benign substitutes for traditional organic solvents used to extract metals has been highly appreciated.…”

Critical elements: opportunities for microfluidic processing and potential for ESG-powered mining investments

“…They range from compact labon-the-chip devices to microfabricated channel plates and flow chemistry-microcapillaries (such as the coiled flow inverter, CFI) to large-scale industrial equipment such as the reentrance flow reactor from the Corning® reactor. [40][41][42] One example of the lab-scale low-flow reactor for the extraction of cobalt has been conducted by Wouters et al 41 The Corning reactor module consists of 6 modules each with a long series of heart-shaped channels (Fig. 4c) with an internal volume of 0.45 mL, and can be operated under a flow rate between 120 and 1200 mL min −1 .…”

Recovery of Ti from titanium white waste acid with N1923 extraction and leaching of low‐grade pyrolusite using raffinate

“…Unfortunately, due to the low content of titanium in the titanium white waste acid and the high content of impurities, especially iron, the method cannot effectively separate and recover titanium. Solvent extraction with the advantages of high efficiency and high selectivity is considered as one of the most effective methods for separating and recovering metals from solution 12 . Many extractants have been investigated to extract titanium from sulfuric acid media, of which organophosphorus extractants are considered to be effective extractants for tetravalent metals, especially titanium 13 .…”

“…Solvent extraction with the advantages of high efficiency and high selectivity is considered as one of the most effective methods for separating and recovering metals from solution. 12 Many extractants have been investigated to extract titanium from sulfuric acid media, of which organophosphorus extractants are considered to be effective extractants for tetravalent metals, especially titanium. 13 For example, Seyfi and Abdi investigated the extraction of titanium from an acidic medium by tributyl phosphate (TBP) and found that the extraction efficiency of titanium was dependent on the acidity of the solution and the formation of a third phase was observed during extraction.…”