One Step Effective Separation of Platinum and Palladium in an Acidic Chloride Solution by Using Undiluted Ionic Liquids

Abstract

concentration on loading capacity and extraction efficiency of Pt(IV) was also investigated.

Uncertainty Principle in the Elucidation of the Extraction Mechanism of Ions from Aqueous towards Ionic Liquid Phases. PtCl62− and [C1C8IM][NTf2] as a Textbook Case

“…This decrease was however proven not to be related to a saturation of the ionic liquid with Sc(III). Similar findings were obtained for Pt(IV) extracted towards [C 1 C 8 IM][NTf 2 ] …”

Recovery of metals from waste electrical and electronic equipment (WEEE) using unconventional solvents based on ionic liquids

“…(Kozonoi & Ikeda, 2007). Regarding metals found in WEEE, these ILs were found to be efficient at extracting precious metals such as Au(III), Pt(IV) or Ir(IV) from acidic aqueous solutions containing large amounts of HCl (Génand-Pinaz et al, 2013;Papaiconomou et al, 2012Papaiconomou et al, & 2014Yang et al, 2014;Tong et al, 2015;Kubota et al, 2017 (Parmentier et al, 2015a) and was employed in a continuous selective metal extraction process for the recovery of cobalt from two mixed salt solutions (Co/Na, Ca/Co/K) (Parmentier et al, 2015b Figure 9. This process clearly shows the potential of ILs to recover metals from complex aqueous solutions using careful selection of the ILs and understanding their influence on the metal extracted complex (chloride vs. nitrate, etc).…”

Extraction and Separation of Pt and Pd by an Imidazolium-Based Ionic Liquid Combined with Phosphonium Chloride

“…Commercial extractants such as crown ethers and octyl(phenyl)-N,N-diisobutylcarbamoylmethyl phosphine oxide (CMPO) and newly synthesized extractants have been used to extract cationic metal ions [10,12]. Furthermore, ILs have been used for extraction both dissolved in organic solvents [13][14][15] and as an undiluted extraction phase [16][17][18][19][20][21][22]. Phosphonium based ILs such as trihexyltetradecylphosphonium chloride, bromide and phosphinate have been applied to the separation of PGMs [21,22].…”

“…Phosphonium based ILs such as trihexyltetradecylphosphonium chloride, bromide and phosphinate have been applied to the separation of PGMs [21,22]. Recently, undiluted imidazolium based ILs have been reported to have a high extraction ability for Au(III) and Pt(IV), as well as the ability to separate these metals from Pd(II) [16,19,20]. Two different ILs [C 8 mim][Tf 2 N] and a phosphonium-based IL, [P 6,6,6,14 ][Br], have been applied to a two-step extraction and separation of Pt(IV) and Pd(II) [21].…”