Recovery of palladium(II) from acidic chloride solution using kerosene containing tri-n-octyl/decyl amine (Alamine 336)

Peng, Chen-Yu; Tsai, Teh-Hua

doi:10.1080/19443994.2012.696803

Cited by 10 publications

(5 citation statements)

References 20 publications

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“…The commercial compounds mostly used for Pd(II) recovery by SX are amines, for instance Alamine 300 [9], Alamine 308 [10], Alamine 336 [11], and quaternary ammonium salts, e.g., Aliquat 336 [12]. These extractants have been employed individually or mixed with solvating extractants like tri-n-butylphosphate (TBP) [10,13], tri-n-octylphosphate (TOP), or methylisobutylketone (MIBK) [13].…”

Section: Commercial Extractantsmentioning

confidence: 99%

Recycling of Palladium from Spent Catalysts Using Solvent Extraction—Some Critical Points

Paiva

2017

Metals

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Electrical and electronics equipment and automotive and industrial catalysts are some examples of top technological devices whose functioning rely on the use of platinum-group metals (PGMs). The PGMs' high economic value and difficult to replace technological properties, together with their scarcity in the Earth's crust, justify concerns about their critical condition and reinforce the importance of developing recycling practices for PGM end-of-life materials. This article presents and discusses recent advances regarding the use of hydrometallurgical solvent extraction to recover one PGM, palladium, from spent catalysts. Two different tendencies are implicit in the literature concerning Pd(II) extraction: a few groups focus on the adjustment and optimization of current commercial extractants, while others prefer to design new extracting compounds. Actually, the leach solutions obtained from the treatment of anthropogenic materials generally exhibit different compositions when compared to those coming from the primary resources. The pros and cons of both approaches are critically discussed, and the assumptions backing some of the reported achievements are also appraised.

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Section: Commercial Extractantsmentioning

confidence: 99%

Recycling of Palladium from Spent Catalysts Using Solvent Extraction—Some Critical Points

Paiva

2017

Metals

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“…However, it was necessary to remove the excess of unreacted free amine because amines are known to form complexes with PGM in the organic phase when protonated, as in (amineH) 2 •PtCl 6 . [29,30] The presence of such amine complexes could lead to inaccurate reporting of PGM extraction if not removed before solvent extraction studies. The different methods used to remove the excess amine are described in the supplementary material (section A).…”

Section: Synthesis Of New Thioamide Proligands and Extractantsmentioning

confidence: 99%

Ditopic Extractants to Separate Palladium(Ii) and Platinum(Iv) Chloridometalates Via Inner or Outer Sphere Binding

Tasker¹,

Wilson²,

Grant³

et al. 2022

SSRN Journal

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“…It is noteworthy that solvent extraction is one of the most effective techniques for the recovery of chromium which is widely used in separation science [3]. With this technique, the amine extractants such as tertiary amines (Alamine 336 and trioctylamine [TOA]) and quaternary ammonium salts (Aliquat 336) have attracted great interest from researchers due to their superiority to selectively extract metal ions such as Zn [4], Cr(III) [5], Pd [6] noble metals [7], and rare earth metals [8]. In addition, a number of researches related to the solvent extraction of chromium(VI) with amine extractant are available in the literature [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Solvent extraction of chromium(VI) from hydrochloric acid solution with trialkylamine/kerosene

Cui

Ren

et al. 2014

Desalination and Water Treatment

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The extraction equilibrium of Cr(VI) with trialkylamine (N235, R 3 N, R = C 8 -C 10 ) using kerosene as the diluent was investigated. The influence of various analytical parameters such as pH, equilibrium time, temperature, extractants, and diluents was systematically evaluated. The structure of organic solution was identified by Fourier transform infrared spectroscopy (FTIR). The results indicated that 99.99% Cr(VI) was extracted by N235 in kerosene under the optimum separation conditions. Results also observed that the relative affinities of different anions to N235 were in the order of NO À 3 < PO 3À 4 < SO 2À 4 < Cl − . Thermodynamic functions revealed that the extraction process was exothermic in nature, and the enthalpy (ΔH) associated with the extraction process was calculated to be −35.95 kJ mol −1 at 298 K. Slope method analysis showed that the log D vs. log [N235] plots were straight lines with slope nearly 3.0 with kerosene, n-heptane, and n-dodecane as the diluents, but mole method analysis indicated that the molar ratio between N235 and hexavalent chromium ion in the extracted complex was identified to be 1. The loaded organic solvent was regenerated with NaOH, NaNO 3 , NaHCO 3 , and N 2 H 4 · H 2 SO 4 . The regenerated solvent could be reused in succeeding extraction of chromium(VI). FTIR confirmed that the structure of the loading organic solution can be destroyed in light.

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Recovery of palladium(II) from acidic chloride solution using kerosene containing tri-n-octyl/decyl amine (Alamine 336)

Cited by 10 publications

References 20 publications

Recycling of Palladium from Spent Catalysts Using Solvent Extraction—Some Critical Points

Recycling of Palladium from Spent Catalysts Using Solvent Extraction—Some Critical Points

Ditopic Extractants to Separate Palladium(Ii) and Platinum(Iv) Chloridometalates Via Inner or Outer Sphere Binding

Solvent extraction of chromium(VI) from hydrochloric acid solution with trialkylamine/kerosene

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