Recovery of Co, Ni, Mo, and V from unroasted spent hydrorefining catalysts by selective chlorination

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Metallurgical Transactions, B (Process Metallurgy); (United States)

DOI:https://doi.org/10.1007/BF02648975· OSTI ID:6534975

Gaballah, I; Djona, M ^[1]

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1. Inst. National Polytechnique de Lorraine, Vandoeuvre (France)

Spent hydrorefining catalysts may contain 4 to 6% of CoO and/or NiO, 8 to 16% of MoO[sub 3], and up to 10% of V[sub 2]O[sub 5], generally supported by alumina. They also contain up to 25% of carbon, hydrocarbons, and sulfur. Selective chlorination of raw, unroasted samples with Cl[sub 2] + air, Cl[sub 2] + N[sub 2], and Cl[sub 2] + CO + N[sub 2] gas mixtures have been investigated for the recovery of valuable elements. The fastest chlorination kinetics are obtained using the Cl[sub 2] + CO + N[sub 2] gas mixture, followed by Cl[sub 2] + N[sub 2]. The best selective chlorination of spent hydrorefining catalysts is obtained using a Cl[sub 2] + air gas mixture. At temperatures lower than 600 C, it is possible to recover more than 90% of the Ni and Co, about 99% of the Mo, and up to 75% of the V compounds. Cobalt and Nickel chlorides are extracted from the chlorination residues by their dissolution with water. Molybdenum and vanadium chlorides and/or oxychlorides are recovered by selective condensation from the vapor phase. The chlorination of the catalyst support, Al[sub 2]O[sub 3], can be limited to less than about 6%. A flow sheet is proposed.

• OSTI ID: 6534975
• Journal Information: Metallurgical Transactions, B (Process Metallurgy); (United States), Journal Name: Metallurgical Transactions, B (Process Metallurgy); (United States) Vol. 26:1; ISSN MTTBCR; ISSN 0360-2141
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
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32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
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CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHLORINATION
CHLORINE
COBALT
DISPERSIONS
EFFICIENCY
ELEMENTS
HALOGENATION
HALOGENS
INDUSTRIAL PLANTS
KINETICS
MANAGEMENT
MATERIALS RECOVERY
METALS
MIXTURES
MOLYBDENUM
NICKEL
NITROGEN
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM REFINERIES
PROCESSING
REACTION KINETICS
THERMODYNAMICS
TRANSITION ELEMENTS
VANADIUM
WASTE MANAGEMENT
WASTE PROCESSING