Investigations on a Novel Process to Recycle Valuable Metals from Spent Al2O3-Based Catalyst

Yan Hai Shao; Ming Ming Li; Xiong Tong

doi:10.4028/www.scientific.net/AMR.634-638.3222

Paper Titles

Crystal Structure of bi(1,10-phenanthroline)- copper-Cl chlorine hydrate, [CuCl(C1₂H₈N₂)₂]Cl_0.5(H₂O)_5.5
p.3201

Effect of Out-Phase Electromagnetic Field on the HDC Casting Process of Commercial Aluminum
p.3205

Experimental Investigation of Indium Extraction by Sulfuric Acid Precure Pressure-Atmospheriation Leaching from Tin Dust
p.3211

Extraction of Vanadium in the Comprehensive Recycling of Spent Al₂O₃-Based Catalyst
p.3216

Investigations on a Novel Process to Recycle Valuable Metals from Spent Al₂O₃-Based Catalyst
p.3222

Research on the Gold Ore Leaching in Iodine-Iodide System
p.3227

Study on Effect of Complexing Agent Addition on Flotation Index of Copper-Nickel Sulfide Ore
p.3234

Review of Arsenic Pollution and Treatment Progress in Nonferrous Metallurgy Industry
p.3239

Study on Continuous Leaching Process of Vanadium Bearing Clinker
p.3244

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Investigations on a Novel Process to Recycle Valuable Metals from Spent Al₂O₃-Based Catalyst

Abstract:

Based on X-ray phase analysis and exploratory experiments, a novel process was proposed to recycle multiple valuable metals like Al, V, Mo, Ni and Co from spent Al₂O₃-based catalyst. The spent catalyst was roasted by adding sodium carbonate with certain mol ratio, after water leaching, Al, V and Mo could be extracted into leach liquor, whereas Ni and Co were enriched in the leaching residue. V and Mo were precipitated in step from leach liquor by adding CaO and BaAl2O4, respectively. After removal of V and Mo, Al(OH)₃ was prepared from sodium aluminate solution with carbonation decomposition process, and the purity of Al₂O₃ is 99.98%. With sodium bicarbonate leaching-purification-precipitation-calcination process, V₂O₅ could be prepared from V-bearing residue. Ni and Co were leached from water leaching residue with sulfuric acid. Recoveries of Al, V, Mo, Ni and Co from spent catalyst are 87.0%, 88.7%, 92.1%, 97.8% and 98.6%, respectively.