Hydrometallurgical Recovery of Cobalt(II) from Spent Industrial Catalysts

Wiecka, Zuzanna; Rzelewska-Piekut, Martyna; Cierpiszewski, Ryszard; Staszak, Katarzyna; Regel‐Rosocka, Magdalena

doi:10.3390/catal10010061

Cited by 21 publications

(20 citation statements)

References 36 publications

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“…All this makes the recovery of cobalt from raw materials and secondary sources very interesting from both environmental and economic reasons. Different techniques have been described for cobalt removal from aqueous solutions, including flocculation [5], adsorption [6][7][8][9], biosorption [10][11][12], phytoremediation [13], solvent extraction [14,15], ion exchange [16] capacitive deionization [17], electrowinning [18], micellar enhanced ultrafiltration [19], nanofiltration [20], reverse and forward osmosis [21,22], membrane distillation [23], liquid membranes [24][25][26][27] and combined methods [28].…”

Section: Introductionmentioning

confidence: 99%

Pertraction of Co(II) through Novel Ultrasound Prepared Supported Liquid Membranes Containing D2EHPA. Optimization and Transport Parameters

et al. 2020

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Pertraction of Co(II) through novel supported liquid membranes prepared by ultrasound, using bis-2-ethylhexyl phosphoric acid as carrier, sulfuric acid as stripping agent and a counter-transport mechanism, is studied in this paper. Supported liquid membrane characterization through scanning electron microscopy, energy-dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy shows the impregnation of the microporous polymer support by the membrane phase by the action of ultrasound. The effect on the initial flux of Co(II) of different experimental conditions is analyzed to optimize the transport process. At these optimal experimental conditions (feed phase pH 6, 0.5 M sulfuric acid in product phase, carrier concentration 0.65 M in membrane phase and stirring speed of 300 rpm in both phases) supported liquid membrane shows great stability. From the relation between the inverse of Co(II) initial permeability and the inverse of the square of carrier concentration in the membrane phase, in the optimized experimental conditions, the transport resistance due to diffusion through both the aqueous feed boundary layer (3.7576 × 104 s·m−1) and the membrane phase (1.1434 × 1010 s·m−1), the thickness of the aqueous feed boundary layer (4.0206 × 10−6 m) and the diffusion coefficient of the Co(II)-carrier in the bulk membrane (4.0490 × 10−14 m2·s−1), have been determined.

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Section: Introductionmentioning

confidence: 99%

Pertraction of Co(II) through Novel Ultrasound Prepared Supported Liquid Membranes Containing D2EHPA. Optimization and Transport Parameters

et al. 2020

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“…[9][10][11] The valuable metals are then separated from the leach solution by precipitation, 12 solvent extraction, or ion exchange. 4,13 For example, molybdenum and cobalt are separated from the leach chloride solution of spent catalysts by solvent extraction with TBP (tributylphosphate) and Alamine 308 (tri-isooctylamine), respectively. 14 Ion exchange resin like Dowex M4195 was employed to adsorb nickel from a sulfuric acid leach solution of spent hydrodesulfurization (HDS) catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…Many efforts have been made to recover metals from spent catalysts by employing processes such as roasting with salts, 3 acid leaching, 2,4 bioleaching, 5 electrolysis, 6 alkali leaching, 7 and chlorination 8 . A process combining these methods can enhance the efficiency of metal dissolution into the leach solution 9–11 .…”

Section: Introductionmentioning

confidence: 99%

Separation of Al(III), Mo(VI), Ni(II), and V(V) from model hydrochloric acid leach solutions of spent petroleum catalyst by solvent extraction

Lee

2020

J of Chemical Tech & Biotech

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BACKGROUND: A large number of spent catalysts are regularly discharged by petrochemical industries. The spent catalysts contain some valuable metals, such as molybdenum, nickel, and vanadium. Therefore, it is necessary to recover these high purity metals from the spent petroleum catalysts with environmentally friendly processes. RESULTS: In order to recover valuable metals such as molybdenum, vanadium, nickel, and aluminum from spent petroleum catalysts, a hydrometallurgical process consisting of leaching followed by solvent extraction was developed in the present work. First, molybdenum was separated from the leaching solution by extraction with D2EHPA and the loaded organic phase was stripped by a mixture of NH 4 OH and (NH 4) 2 CO 3. Second, the molybdenum free raffinate was contacted with Aliquat 336-decanol to separate the vanadium, and then a hydrochloric acid solution was employed to strip vanadium from the corresponding loaded extractant. Since the acidity of the leach solution was high, TEHA (tris-2-ethylhexylamine) was chosen for the extraction of hydrochloric acid in order to increase the pH of solution. The loaded TEHA phase was then stripped by distilled water, which enabled the recovery of HCl. The nickel and aluminum in the molybdenum and vanadium free raffinate were separated by the extraction of nickel with saponified Cyanex 301 at a solution pH of 2.5. It was possible to strip nickel from the loaded organic phase by a strong hydrochloric acid solution. CONCLUSIONS: A flow sheet of the proposed process for the separation of Al(III), Mo(VI), Ni(II), and V(V) was presented. The current process can be applied to aqueous solutions containing these four metals from diverse material resources.

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“…For many years, research efforts have been undertaken to find efficient solutions for catalyst utilization. Two methods that have been considered for this were deoiling or decoking and metal extraction or recovery (Al-Sheeha et al 2013;Wiecka et al 2020). Using unprocessed spent catalysts in the production of new catalysts or using them as additives to other useful materials also has been explored through the years (Furimsky and Biagini 1996;Trochez et al 2015;Marafi et al 2017).…”

Section: Introductionmentioning

confidence: 99%

“…However, pyrometallurgy has huge disadvantages, namely the need for special equipment and high energy consumption. Moreover, concentrated metals must be refined (Ding et al 2019;Pathak et al 2020;Wiecka et al 2020). Therefore, the application of hightemperature treatment is limited from both environmental and economic viewpoints.…”

Section: Introductionmentioning

confidence: 99%

Spent sulfuric acid plant catalyst: valuable resource of vanadium or risky residue? Process comparison for environmental implications

Mikoda

Potysz

Gruszecka‐Kosowska

et al. 2020

Environ Sci Pollut Res

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The enormous amount of spent catalysts generated worldwide may pose a risk to the environment because of their high load of metals, including vanadium. The latter may be mobilized and released to the environment if managed improperly. Moreover, the catalysts could be considered as secondary resources rather than waste. This study aimed at the efficient extraction of vanadium from spent desulfurization catalyst (SDC) from a sulfuric acid production plant. The raw SDC and the post-extraction residues were characterized in terms of their chemical and phase composition. The metal mobility from the materials was examined with both single-step and multi-step extractions. The environmental risk assessment was performed using sequential extraction. The study revealed that both tested methods (citric acid leaching and bioleaching with Acidithiobacillus thiooxidans) enable the extraction of nearly 96% of V from SDC with a simultaneous reduction of metal mobility. However, the bacterial treatment was found more suitable. The leached residue was mostly (> 90%) composed of SiO2, which makes it a potential candidate for application in construction (e.g., concrete mixtures) after additional examinations. The study highlights the need to develop a metal extraction process for SDC in a way that metal-free residue could be a final product.

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Hydrometallurgical Recovery of Cobalt(II) from Spent Industrial Catalysts

Cited by 21 publications

References 36 publications

Pertraction of Co(II) through Novel Ultrasound Prepared Supported Liquid Membranes Containing D2EHPA. Optimization and Transport Parameters

Pertraction of Co(II) through Novel Ultrasound Prepared Supported Liquid Membranes Containing D2EHPA. Optimization and Transport Parameters

Separation of Al(III), Mo(VI), Ni(II), and V(V) from model hydrochloric acid leach solutions of spent petroleum catalyst by solvent extraction

Spent sulfuric acid plant catalyst: valuable resource of vanadium or risky residue? Process comparison for environmental implications

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