Facile molybdenum and aluminum recovery from spent hydrogenation catalyst

Lv, Zhenhui; Li, Jianan; Xue, Dong; Yang, Tao; Wang, Gang; Peng, Chong

doi:10.1016/j.cjche.2024.01.006

Cited by 2 publications

(2 citation statements)

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“…Since the leaching paths of NaAlO 2 and NiO in the roasting product overlap with that of molybdenum, which also occurs in pyrometallurgical and biometallurgical recovery routes, further means for separating Mo are necessary. 7,8 Solvent extraction, ion exchange, and adsorption are feasible approaches. Based on the fact that Mo exists as anions (MoO , and H 2 Mo 7 O 24 4− ) in weakly acidic to alkaline solutions, primary-/tertiary-/quaternary-amine, organo-phosphoric, amine resins, and bifunctional ionic liquids have effectively extracted Mo.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Among hydrometallurgical routes, to drive the Mo present as MoS 2 /MoO x in spent HDS catalysts into the aqueous phase maximally, roasting assisted by sodium salts becomes an enabler for reconstruction of Mo phase into a soluble salt. Since the leaching paths of NaAlO 2 and NiO in the roasting product overlap with that of molybdenum, which also occurs in pyrometallurgical and biometallurgical recovery routes, further means for separating Mo are necessary. , Solvent extraction, ion exchange, and adsorption are feasible approaches. Based on the fact that Mo exists as anions (MoO 4 2– , Mo 7 O 24 6– , HMo 7 O 24 5– , and H 2 Mo 7 O 24 4– ) in weakly acidic to alkaline solutions, primary-/tertiary-/quaternary-amine, organo-phosphoric, amine resins, and bifunctional ionic liquids have effectively extracted Mo. − Subsequently, stripping/elution and evaporation-crystallization processes are indispensable for recovery.…”

Section: Introductionmentioning

confidence: 99%

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Highly Selective Separation and Recovery of Molybdenum from Spent Catalysts by Constructing a Glass-Phase Extraction System

Cai,

Nie,

et al. 2024

ACS Sustainable Chem. Eng.

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Separation and recovery of molybdenum (Mo) with high concentrations from spent catalysts is a strategy for avoiding the environmental footprint by metal mining and the disposal of hazardous wastes, while alleviating resource shortage. In this paper, a method for constructing a binary (SiO 2 −Na 2 O)/ternary (SiO 2 − Na 2 O−B 2 O 3 ) glass phase extraction (GPE) system to selectively extract the impurity metal ions from spent catalysts as well as simultaneously separate and recover Mo is presented. Based on experimental studies and classical molecular dynamics simulations, compared with the binary glass network, 99.4% of Al 3+ and Ni 2+ in spent catalysts were extracted in a more stable tetra-coordinated form at a lower melting temperature (1200 °C) by the ternary GPE system introducing B 2 O 3 , accompanied by Na 2 MoO 4 precipitated as the recovery product. The recovery efficiency of Mo was 98.1%, realizing an efficient separation and short-process recovery. Moreover, the separation of Na 2 MoO 4 melt and glassy liquid during the melting process was visually observed online. Therefore, this approach of constructing glass GPE systems for the one-step separation of metals during the melting process is expected to contribute to the sustainable supply of critical metals.

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Section: ■ Introductionmentioning

confidence: 99%