Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Lanthanum Oxide Obtention from Different Spent Fluid Catalytic Cracking Catalysts

Version 1 : Received: 3 December 2021 / Approved: 6 December 2021 / Online: 6 December 2021 (12:04:43 CET)

How to cite: Alcaraz, L.; Largo, O.R.; Alguacil, F.J.; Montes, M.A.; Baudín, C.; López, F.A. Lanthanum Oxide Obtention from Different Spent Fluid Catalytic Cracking Catalysts. Preprints 2021, 2021120064 (doi: 10.20944/preprints202112.0064.v1). Alcaraz, L.; Largo, O.R.; Alguacil, F.J.; Montes, M.A.; Baudín, C.; López, F.A. Lanthanum Oxide Obtention from Different Spent Fluid Catalytic Cracking Catalysts. Preprints 2021, 2021120064 (doi: 10.20944/preprints202112.0064.v1).

Abstract

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.

Keywords

spent fluid catalytic cracking catalyst; waste slag; leaching; lanthanum oxide; rare earths recovery

Subject

CHEMISTRY, Applied Chemistry

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