Metal recovery from porous materials
Patent
·
OSTI ID:7278897
A method is described for recovering plutonium and other metals from materials by leaching comprising the steps of incinerating the materials to form a porous matrix as the residue of incineration, immersing the matrix into acid in a microwave-transparent pressure vessel, sealing the pressure vessel, and applying microwaves so that the temperature and the pressure in the pressure vessel increase. The acid for recovering plutonium can be a mixture of HBF[sub 4] and HNO[sub 3] and preferably the pressure is increased to at least 100 PSI and the temperature to at least 200 C. The porous material can be pulverized before immersion to further increase the leach rate.
- DOE Contract Number:
- AC09-89SR18035
- Assignee:
- PTO; EDB-94-086786
- Patent Number(s):
- US 5154899; A
- Application Number:
- PPN: US 7-723122
- OSTI ID:
- 7278897
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACTINIDES
BORON COMPOUNDS
CHEMICAL REACTIONS
COMBUSTION
DISSOLUTION
ELEMENTS
FLUORINE COMPOUNDS
FLUOROBORIC ACID
HALOGEN COMPOUNDS
HEATING
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LEACHING
MANAGEMENT
MATERIALS
MATERIALS RECOVERY
METALS
MICROWAVE HEATING
NITRIC ACID
OXIDATION
PLUTONIUM
PRESSURIZATION
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTES
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
TRANSURANIUM ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACTINIDES
BORON COMPOUNDS
CHEMICAL REACTIONS
COMBUSTION
DISSOLUTION
ELEMENTS
FLUORINE COMPOUNDS
FLUOROBORIC ACID
HALOGEN COMPOUNDS
HEATING
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LEACHING
MANAGEMENT
MATERIALS
MATERIALS RECOVERY
METALS
MICROWAVE HEATING
NITRIC ACID
OXIDATION
PLUTONIUM
PRESSURIZATION
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTES
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
TRANSURANIUM ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES