Recovery of metal values from spent hydrodesulfurization catalysts

Patent · Tue Jan 22 00:00:00 EST 1985

OSTI ID:5765909

Sebenik, R F; Laferty, J M; LaValle, P P; May, W A

A process is provided for recovering metal values from spent hydrodesulfurization catalyst, the process comprising forming in a pressure reactor an aqueous slurry of finely divided spent catalyst and sodium carbonate, the spent catalyst containing by weight about 2 to 10% Mo, up to about 12% V (e.g., about 2 to 10%), about 0.5 to 4% Co, up to about 10% Ni(e.g., about 0.5 to 5%), occluded oil, coke, sulfide sulfur and the balance essentially alumina. The amount of sodium carbonate employed is at least sufficient under oxidizing conditions to convert molybdenum and any vanadium present to soluble Na/sub 2/MoO/sub 4/ and NaVO/sub 3/ and to neutralize SO/sub 3/ produced during oxidation, the amount of sodium carbonate being at least that required stoichiometrically. The slurry is heated to a temperature of about 200/sup 0/ C. to 350/sup 0/ C. (e.g., 275/sup 0/ C. to 325/sup 0/ C.) and a pressure of about 800 psig to 2500 psig (e.g., about 1500 psig to 2500 psig) for a time at least sufficient to solubilize the molybdenum and vanadium present, the amount of oxygen employed being over about 1.1 times the stoichiometric amount sufficient to oxidize the metal values and sulfur to the maximum oxidized state, and to oxidize the oil and free carbon to CO/sub 2/ and H/sub 2/O. The solubilized Mo and V are thereafter separated from each other.

• Assignee: Amax Inc.
• Patent Number(s): US 4495157
• OSTI ID: 5765909
• Resource Relation: Patent File Date: Filed date 2 Sep 1983; Other Information: PAT-APPL-528884
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CATALYSTS
DEMETALLIZATION
HYDROCRACKING
PETROLEUM
DESULFURIZATION
AQUEOUS SOLUTIONS
CHEMICAL COMPOSITION
COBALT
HEATING
HIGH TEMPERATURE
MATERIALS RECOVERY
MOLYBDENUM
NICKEL
SLURRIES
SODIUM CARBONATES
VANADIUM
WASTE WATER
WATER TREATMENT
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DISPERSIONS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
METALS
MIXTURES
OXYGEN COMPOUNDS
PROCESSING
PYROLYSIS
RECOVERY
SEPARATION PROCESSES
SODIUM COMPOUNDS
SOLUTIONS
SUSPENSIONS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER
020400* - Petroleum- Processing