Value recovery from spent alumina-base catalyst
A process for the recovery of aluminum and at least one other metal selected from the group consisting of molybdenum, nickel and cobalt from a spent hydrogenation catalyst comprises (1) adding about 1 to 3 parts H[sub 2]SO[sub 4] to each part of spent catalyst in a reaction zone of about 20 to 200 C under sulfide gas pressure between about 1 and about 35 atmospheres, (2) separating the resultant Al[sub 2](SO[sub 4])[sub 3] solution from the sulfide precipitate in the mixture, (3) oxidizing the remaining sulfide precipitate as an aqueous slurry at about 20 to 200 C in an oxygen-containing atmosphere at a pressure between about 1 and about 35 atmospheres, (4) separating the slurry to obtain solid molybdic acid and a sulfate liquor containing said at least one metal, and (5) recovering said at least one metal from the sulfate liquor in marketable form. 2 figs.
- Assignee:
- Chemical Metal Industries, Inc., Denver, CO (United States)
- Patent Number(s):
- US 4657745; A
- Application Number:
- PPN: US 6-846125
- OSTI ID:
- 7259809
- Resource Relation:
- Patent File Date: 31 Mar 1986
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ALUMINIUM
MATERIALS RECOVERY
CATALYSTS
COBALT
MOLYBDENUM
NICKEL
ALUMINIUM SULFATES
BY-PRODUCTS
HYDROGENATION
OXIDATION
PRESSURIZATION
SULFIDES
SULFURIC ACID
WASTE MANAGEMENT
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MANAGEMENT
METALS
OXYGEN COMPOUNDS
PROCESSING
SULFATES
SULFUR COMPOUNDS
TRANSITION ELEMENTS
WASTE PROCESSING
020800* - Petroleum- Waste Management
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management