Copper extraction from ammoniacal medium in a pulsed sieve-plate column with LIX 84-I

Gameiro, M. Lurdes F.; Machado, Remígio M.; Ismael, M. Rosinda C.; Reis, M. Teresa A.; Carvalho, Jorge M.R.

doi:10.1016/j.jhazmat.2010.07.006

Cited by 55 publications

(15 citation statements)

References 35 publications

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“…48 Annular centrifugal extractorR 3 N and (R 3 NH) 2 SO 4 / p -cresol-HNO 3 /water1/7.6~192.01%~99.98%Gameiro et al . 49 Pulsed sieve-plate columnShellsol D-70/NH 3 /(NH 4 ) 2 SO 4 0.5~590.5%~99.5%Yung et al . 50 Reciprocating plate columnIonic liquids/phenol/water0.24~1.05Zhao et al .…”

Section: Introductionmentioning

confidence: 99%

Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone

Huang

Wang

Chen

et al. 2017

Sci Rep

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The previous literature reports that using a hydrocyclone as an extractor intensifies the mass transfer and largely reduces the consumption of extractant from 1800–2000 kg h−1 to 30–90 kg h−1. However, the intensification mechanism has not been clear. This paper presents experimental and numerical methods to study the multi-scale motion of particles in hydrocyclones. In addition to the usually considered translational behavior, the high-speed rotation of dispersed micro-spheres caused by the anisotropic swirling shear flow is determined. The rotation speeds of the tested micro-spheres are above 1000 rad s−1, which are much larger than the instantaneous rotation speed in isotropic turbulence. Due to the conical structure of a hydrocyclone, the rotation speed maintains stability along the axial direction. Numerical results show that the particle Reynolds number of micro-droplets in a hydrocyclone is equal to that in conventional extractors, but the particles have high rotation speeds of up to 10,000 rad s−1 and long mixing lengths of more than 1000 mm. Both the rotation of micro-droplets along the spiral trajectories and the intense eddy diffusion in a hydrocyclone contribute to the extraction intensification.

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Section: Introductionmentioning

confidence: 99%

Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone

Huang

Wang

Chen

et al. 2017

Sci Rep

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“…AS are comprised of a benzene ring, phenolic hydroxyl, ortho-directing oximido, and para-directing alkyl (i.e., R group). In this group of chemical compounds, the para-directing R group has great impact on their charge distribution, steric-hindrance effect, and so on, which determines their extraction ability for Cu(II) [8,9]. At present, AS are produced by bio-extraction and artificial synthesis, with the artificial synthesis route being the dominant technique for the production of AS [10,11].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Structure of Alkyl Salicylaldoxime on Extraction of Copper(II)

Wang

et al. 2017

Minerals

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Four kinds of alkyl salicylaldoxime (AS) were investigated to probe the effect of molecular structure on the extraction of Cu(II). With the augment of R groups, tert-octylsalicylaldoxime and nonylsalicylaldoxime have much stronger extraction ability for Cu(II) than salicylaldoxime and tert-butylsalicylaldoxime, which is consistent with the rise of hydrophobicity (Log P) of the extractants. The umbrella structure of the R group can endow tert-octylsalicylaldoxime with stronger steric-hindrance effect than nonylsalicylaldoxime, which results in the better separation efficiency of Cu(II) from Fe(III) for tert-octylsalicylaldoxime. The extraction ability of the extractants for Cu(II) is related to the hydrophobicity and molecular size, as predicted from quantum chemistry calculation.

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“…The continuous expansion of electronic equipments is escalating the growth of PCBs and thus, an analyst estimated a compound annual growth rate of 7.8% for PCBs over the period 2012-2016 [6]. PCBs are generally employed to mechanically hold the electronic components using conductive pathways of Cu circuit on its surface.…”

Section: Introductionmentioning

confidence: 99%

“…PCBs are generally employed to mechanically hold the electronic components using conductive pathways of Cu circuit on its surface. The presence of Cu (as a metallic constituent) in the PCBs of different electronic equipment is shown in Fig.1 [6][7]. Various other metals are also present along with some hazardous materials like PVC plastics, brominated flame retardants, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Gameiro et al investigated copper extraction from the ammoniacal medium in a pulsed sieve-plate column with LIX 84IC using Shellsol D-70 as diluent with anefficiency of copper removal in the range of 90.5-99.5%. Apart from copper, acid extraction has also been reported by different researchers[6]. Shin et al studied the extraction and recovery of nitric acid from waste etching solution using TBP as a solvent[18].…”

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confidence: 99%

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Recovery of copper and recycling of acid from the leach liquor of discarded Printed Circuit Boards (PCBs)

Choubey

Panda

Jha

et al. 2015

Separation and Purification Technology

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Copper extraction from ammoniacal medium in a pulsed sieve-plate column with LIX 84-I

Cited by 55 publications

References 35 publications

Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone

Liquid-liquid extraction intensification by micro-droplet rotation in a hydrocyclone

Effect of the Structure of Alkyl Salicylaldoxime on Extraction of Copper(II)

Recovery of copper and recycling of acid from the leach liquor of discarded Printed Circuit Boards (PCBs)

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