Process for the selective removal of arsenic in the course of the oxidizing attack by means of a carbonated liquor on a uraniferous ore containing same
Patent
·
OSTI ID:6861104
A process for the selective removal of arsenical materials, in the course of a continuous hot oxidizing attack process, comprises attacking a uraniferous ore containing arsenical materials as impurities in the presence of an oxidizing agent in the reaction medium by means of an aqueous liquor formed by a recycling solution containing alkali metal carbonate and bicarbonate, and uranium close to the limit of solubility thereof, under concentration, temperature and pressure conditions which causes solubilization of the uranium present in the ore, and re-precipitation thereof in the attack medium. A suspension of a solid phase in a liquid phase is collected which, after cooling, is subjected to a separation operation. The liquid phase is recycled to the attack operation, and the separated solid phase is treated by means of an aqueous liquor to re-dissolve the precipitated uranium which is characterized in that the arsenic which is solubilized in the attack operation is extracted by means of a magnesium compound which is introduced in an amount that is at least equal to the stoichiometric amount required to cause precipitation of magnesium arsenate.
- Assignee:
- Aluminium Pechiney (France)
- Patent Number(s):
- US 4423010
- OSTI ID:
- 6861104
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
050400* -- Nuclear Fuels-- Feed Processing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ACID CARBONATES
ACTINIDES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
ARSENATES
ARSENIC
ARSENIC COMPOUNDS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CHEMICAL REACTIONS
CONTROL
DISPERSIONS
DISSOLUTION
ELEMENTS
EXTRACTION
MAGNESIUM COMPOUNDS
MATERIALS
METALS
MIXTURES
ORE PROCESSING
ORES
OXIDATION
OXYGEN COMPOUNDS
PRECIPITATION
PRESSURE CONTROL
PROCESS SOLUTIONS
PROCESSING
PURIFICATION
QUANTITY RATIO
RECYCLING
REMOVAL
SEMIMETALS
SEPARATION PROCESSES
SOLUBILITY
SOLUTIONS
SOLVENT EXTRACTION
TEMPERATURE CONTROL
URANIUM
URANIUM ORES
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ACID CARBONATES
ACTINIDES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
ARSENATES
ARSENIC
ARSENIC COMPOUNDS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CHEMICAL REACTIONS
CONTROL
DISPERSIONS
DISSOLUTION
ELEMENTS
EXTRACTION
MAGNESIUM COMPOUNDS
MATERIALS
METALS
MIXTURES
ORE PROCESSING
ORES
OXIDATION
OXYGEN COMPOUNDS
PRECIPITATION
PRESSURE CONTROL
PROCESS SOLUTIONS
PROCESSING
PURIFICATION
QUANTITY RATIO
RECYCLING
REMOVAL
SEMIMETALS
SEPARATION PROCESSES
SOLUBILITY
SOLUTIONS
SOLVENT EXTRACTION
TEMPERATURE CONTROL
URANIUM
URANIUM ORES