Recovering metals from spent hydroprocessing catalysts

Patent · Tue Feb 19 00:00:00 EST 1985

OSTI ID:5566840

Hubred, G L; Van Leirshurg, D A

A process for recovering the metal values from spent hydroprocessing catalyst particles. The metal values will include at least one metal of Group VIII of the Periodic Table and at least one metal of Group Vb or Group VIb of the Periodic Table. The spent catalyst particles are first roasted at between 400/sup 0/ C. and 600/sup 0/ C. and then contacted with a first aqueous solution of ammonia and an ammonium salt forming a first pregnant liquor. The once-leached spent hydroprocessing catalysts are contacted with a second aqueous solution of sulfur dioxide forming a second pregnant liquor. The metal values are precipitated from the second pregnant liquor with hydrogen sulfide and the precipitate is roasted with unroasted spent hydroprocessing catalysts. The metal values of Group Vb and Group VIb in the first pregnant liquor are transferred into a first organic solution by liquid ion exchange. The first organic solution is stripped by an aqueous strip solution and the metal values separated by sequential precipitation. The metals of Group VIII are separated and purified by serial liquid ion exchange.

• Assignee: Chevron Research Co.
• Patent Number(s): US 4500495
• OSTI ID: 5566840
• Resource Relation: Patent File Date: Filed date 1 Aug 1983; Other Information: PAT-APPL-519180
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CATALYSTS
MATERIALS RECOVERY
METALS
REMOVAL
AMMONIA
AMMONIUM COMPOUNDS
CHEMICAL REACTIONS
HYDROCARBONS
HYDROGEN SULFIDES
LEACHING
PRECIPITATION
ROASTING
SALTS
CHALCOGENIDES
DISSOLUTION
ELEMENTS
HYDRIDES
HYDROGEN COMPOUNDS
MANAGEMENT
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC COMPOUNDS
OXIDATION
PROCESSING
RECOVERY
SEPARATION PROCESSES
SULFIDES
SULFUR COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management