Lanthanum recycling from spent FCC catalyst through leaching assisted by electrokinetic remediation: Influence of the process conditions on mass transfer

Maidel, Michele; Ponte, Maria José Jerônimo de Santana; Ponte, Haroldo de Araújo; Valt, Renata Bachmann Guimarães

doi:10.1016/j.seppur.2021.119905

Cited by 14 publications

(2 citation statements)

References 19 publications

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“…During the process, the FCC catalyst is frequently purged and replaced with fresh catalyst to manage the process performance [9]. The withdrawn material discharged during the FCC catalyst process is called spent FCC catalyst (sFCC), or equilibrium catalyst (Ecat).…”

Section: Introductionmentioning

confidence: 99%

Extraction of Lanthanum Oxide from Different Spent Fluid Catalytic Cracking Catalysts by Nitric Acid Leaching and Cyanex 923 Solvent Extraction Methods

Alcaraz

Largo

Montes³

et al. 2022

Metals

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A laboratory-scale procedure was developed to obtain lanthanum oxide from spent fluid catalytic cracking catalyst, commonly used in the heavy crude oil cracking process. Two different solids, consisting mainly of silica, alumina, and a certain amount of rare earth elements, were leached under several conditions to recover the rare earths. Nitric acid leaching lead to the highest recovery of lanthanum, reaching a recovery percentage greater than 95% when a 1.5 M concentration was used. Subsequently, liquid phases were subjected to a liquid–liquid extraction process using Cyanex 923 diluted in Solvesso 100, and the lanthanum was quantitatively extracted. Lanthanum was also quantitatively stripped using oxalic acid to obtain the corresponding lanthanum oxalates, as revealed by X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential thermal analysis (DTA), and Fourier transform infrared (FTIR) techniques. After thermal treatment at 1200 °C for 2 h, these solids yielded lanthanum oxide.

show abstract

Section: Introductionmentioning

confidence: 99%

Extraction of Lanthanum Oxide from Different Spent Fluid Catalytic Cracking Catalysts by Nitric Acid Leaching and Cyanex 923 Solvent Extraction Methods

Alcaraz

Largo

Montes³

et al. 2022

Metals

View full text Add to dashboard Cite

show abstract

“…During the process, the FCC catalyst is frequently purged and replaced with a fresh catalyst to manage the process performance [9]. The withdrawn material discharged during the FCC catalyst process is called spent FCC catalyst (sFCC), or equilibrium catalyst (Ecat).…”

Section: Introductionmentioning

confidence: 99%

Lanthanum Oxide Obtention from Different Spent Fluid Catalytic Cracking Catalysts

Alcaraz¹,

Largo²,

Montes³

et al. 2021

Preprint

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An laboratory procedure has been developed to obtain lanthanum oxide from spent fluid catalytic cracking catalyst, commonly used in the cracking the heavy crude oil process. Two different spent fluid catalytic cracking catalysts, which are mainly formed by silica and alumina, and a certain amount of rare earths were leached under several conditions to recover the rare earth from the solids waste. Subsequently, liquid phases were subjected to a liquid-liquid extraction process, and lanthanum was quantitatively stripped using oxalic acid to obtain the corresponding lanthanum oxalates. After the corresponding thermal treatment, these solids were transformed into lanthanum oxide. Both, lanthanum oxalates and oxides solids have been characterized by wide techniques in order to investigate the purity of the phases.

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Nanohydrometallurgy with superparamagnetic nanoparticles for selective separation of lanthanum from a real spent catalyst

Pavoski,

Toma,

Espinosa

et al. 2024

J Mater Cycles Waste Manag

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Lanthanum recycling from spent FCC catalyst through leaching assisted by electrokinetic remediation: Influence of the process conditions on mass transfer

Cited by 14 publications

References 19 publications

Extraction of Lanthanum Oxide from Different Spent Fluid Catalytic Cracking Catalysts by Nitric Acid Leaching and Cyanex 923 Solvent Extraction Methods

Extraction of Lanthanum Oxide from Different Spent Fluid Catalytic Cracking Catalysts by Nitric Acid Leaching and Cyanex 923 Solvent Extraction Methods

Lanthanum Oxide Obtention from Different Spent Fluid Catalytic Cracking Catalysts

Nanohydrometallurgy with superparamagnetic nanoparticles for selective separation of lanthanum from a real spent catalyst

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