Reactive extraction of cobalt sulfate solution with D2EHPA/TBP extractants in the pilot plant Oldshue–Rushton column

Torkaman, Rezvan; Asadollahzadeh, Mehdi; Torab‐Mostaedi, Meisam; Maragheh, Mohammad Ghannadi

doi:10.1016/j.cherd.2017.02.004

Cited by 32 publications

(8 citation statements)

References 40 publications

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“…There are several countercurrent-agitated LLE columns commonly used for commercial applications such as the rotating disk contactor (RDC), − asymmetric rotating disk contactor (ARDC), ,, pulsed column, , Kuhnni, Karr, Scheibel column, and multistage impeller columns. , In recent times, several researchers have investigated the mass transfer characteristics of these extraction columns for the separation of metal ions from aqueous solutions, for example, extraction of samarium and gadolinium from aqueous nitrate solution in the pulsed disc and doughnut column, extraction of cobalt from sulfate solution in the Oldshue–Rushton column, extraction and separation of lanthanum and cerium from aqueous solution in the Scheibel column, extraction of samarium and gadolinium in the Mixco Column, extraction of europium using an ionic liquid in ARDC, and so forth.…”

Section: Introductionmentioning

confidence: 99%

Scale-Up Study on the Performance of the Asymmetric Rotating Impeller Extraction Column

Hendre

Hinge

Patwardhan

2021

Ind. Eng. Chem. Res.

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In the present work, hydrodynamics and mass transfer performance of the asymmetric rotating impeller column (ARIC) of different scales, that is, ARIC 1 (I.D. = 0.1 m), ARIC 2 (I.D. = 0.22 m), and ARIC 3 (I.D. = 0.3 m), have been investigated. The liquid−liquid system used in the present study is phosphoric acid containing metal ions and the organo-phosphorous solvent. The effect of different operating conditions on regime transition in ARIC of different scales has been analyzed. Correlations have been developed for the prediction of holdup and drop size in the ARIC of different scales. The average absolute relative error values in the prediction of holdup and drop size using these correlations are 10 and 9%, respectively. An increase in the height of transfer unit is observed with an increase in throughput and column diameter. The results indicate that adequate design and scale-up of extraction columns can be carried out based on geometric similarity.

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Section: Introductionmentioning

confidence: 99%

Scale-Up Study on the Performance of the Asymmetric Rotating Impeller Extraction Column

Hendre

Hinge

Patwardhan

2021

Ind. Eng. Chem. Res.

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“…TBP has been discovered to control third-phase formation, as a phase modifier. D2EHPA-TBP has been proven for the improved extraction of several metal cations, such as Cu(II) [ 15 , 16 ], Co(II) [ 17 , 18 ], Fe(III) [ 19 ], Ni(II) [ 20 ], Zn(II) [ 21 ]. There is no literature traceable regarding the extraction of Cd(II) using the combination of Aliquat 336 and TBP.…”

Section: Introductionmentioning

confidence: 99%

Optimization for Liquid-Liquid Extraction of Cd(II) over Cu(II) Ions from Aqueous Solutions Using Ionic Liquid Aliquat 336 with Tributyl Phosphate

Lee

Morad

Ismail

et al. 2020

IJMS

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This study investigates the separation of two heavy metals, Cd(II) and Cu(II), from the mixed synthetic feed using a liquid-liquid extraction. The current study uses tri-octyl methylammonium chloride (Aliquat 336) as the extractant (with tributyl phosphate (TBP) as a phase modifier), diluted in toluene, in order to investigate the selective extraction of Cd(II) over Cu(II) ions. We investigate the use of ethylenediaminetetraacetic acid (EDTA) as a masking agent for Cu(II), when added in aqueous feed, for the selective extraction of Cd(II). Five factors that influence the selective extraction of Cd(II) over Cu(II) (the equilibrium pH (pHeq), Aliquat 336 concentration (Aliquat 336), TBP concentration (TBP), EDTA concentration (EDTA), and organic to aqueous ratio (O:A)) were analyzed. Results from a 25–1 fractional factorial design show that Aliquat 336 significantly influenced Cd(II) extraction, whereas EDTA was statistically significant for the antagonistic effect on the E% of Cu(II) in the same system. Moreover, results from optimization experiment showed that the optimum conditions are Aliquat 336 concentration of 99.64 mM and EDTA concentration of 48.86 mM—where 95.89% of Cd(II) was extracted with the least extracted Cu(II) of 0.59%. A second-order model was fitted for optimization of Cd(II) extraction with a R2 value of 0.998, and ANOVA results revealed that the model adequately fitted the data at a 5% significance level. Interaction between Aliquat 336 and Cd(II) has been proven via FTIR qualitative analysis, whereas the addition of TBP does not affect the extraction mechanism.

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“…media containing metallic ions, especially in treatment of metal-bearing liquid waste, hydrometallurgical industry and analytical waste. Among the various available techniques for heavy metal removal, LLE has been a well-established process for its cost efficiency, high selectivity and recovery, short reaction time and continuous operation with mild reaction condition [4]. In LLE process, metallic ions are retrieved based on their mass transfer rates and also the principle of solutes distribution ratio between two immiscible phases [5].…”

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confidence: 99%

“…Tributyl phosphate (TBP) is known to be one of the major neutral extracting agent and effective organic phase modifier in numerous applications for extraction of several metals such as Cd 2+ [17], Cu 2+ [18], [19], Co 2+ [4], [20], Fe 3+ [21], Ni 2+ [22], and Zn 2+ [23]. Researchers agree that TBP enhances phase separation conditions when it is used as modifier [15].…”

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confidence: 99%

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Synergistic Extraction of Cd, Cu and Ni with D2EHPA/TBP: Screening of Factors by Fractional Factorial Design

Lee¹,

Morad²,

Ismail³

et al. 2019

IJCEA

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This work aimed to determine the significant factors that provide great impacts on the efficiency of synergistic extraction of Cd, Cu and Ni from mixed synthetic aqueous solutions with mixture of extractants, di-(2-ethylhexyl) phosphoric acid (D2EHPA) and tributyl phosphate (TBP) by using two-level fractional factorial design. Six factors affecting the synergistic extraction consisted of mixing time (t), concentration of D2EHPA [D2EHPA], concentration of TBP [TBP], concentration of sodium sulphate [Na 2 SO 4 ], equilibrium pH (pH eq) and organic to aqueous ratio (O:A) were examined. Results from the application of 2 6-1 fractional factorial design showed that [D2EHPA], O:A and interaction of D2EHPA with TBP ([D2EHPA] × [TBP]) have significantly influenced the extraction percentage (E%) for Cd and Cu.

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Reactive extraction of cobalt sulfate solution with D2EHPA/TBP extractants in the pilot plant Oldshue–Rushton column

Cited by 32 publications

References 40 publications

Scale-Up Study on the Performance of the Asymmetric Rotating Impeller Extraction Column

Scale-Up Study on the Performance of the Asymmetric Rotating Impeller Extraction Column

Optimization for Liquid-Liquid Extraction of Cd(II) over Cu(II) Ions from Aqueous Solutions Using Ionic Liquid Aliquat 336 with Tributyl Phosphate

Synergistic Extraction of Cd, Cu and Ni with D2EHPA/TBP: Screening of Factors by Fractional Factorial Design

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