Non-polluting treatment of alkaline uraniferous effluents containing SO/sub 4/ ions
A cyclic process for the treatment of a uraniferous liquor containing, in addition to the desired metal, sodium carbonate and/or bicarbonate and sodium sulphate, obtained by the alkaline attack of a sulphur-containing uraniferous ore, the said process comprising the neutralization of the uraniferous liquor then the fixation of the uranium and the SO/sub 4/ ions over a strong anion exchange resin, the elution thereof with an ammonium carbonate and/or bicarbonate solution in the form of an ammonium uranyl carbonate which is subsequently decomposed and ammonium sulphate, the precipitation and the calcination of the precipitated uranates and/or diuranates with regeneration of the eluent solution of ammonium carbonate and/or bicarbonate, the causticiation of the liquor freed from uranium which leaves the anion-exchange resin to eliminate the SO/sub 4/ ions in calcium form, recycling a carbonated and/or bicarbonated liquor which is free from SO/sub 4/ ions to the attack of the ore, finally the regeneration of the elution liquor of the SO/sub 4/ ions and of the uranium.
- Assignee:
- Pechiney Ugine Kulhmann
- Patent Number(s):
- US 4349512
- OSTI ID:
- 6477486
- Resource Relation:
- Patent Priority Date: Priority date 8 Feb 1978, France; Other Information: PAT-APPL-006332
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FEED MATERIALS PLANTS
POLLUTION CONTROL
URANIUM ORES
ORE PROCESSING
URANIUM OXIDES
RECOVERY
AMMONIA
ANIONS
CALCINATION
DECOMPOSITION
HEATING
ION EXCHANGE MATERIALS
RECYCLING
SEPARATION PROCESSES
SODIUM CARBONATES
SODIUM SULFATES
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL REACTIONS
CONTROL
HYDRIDES
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
IONS
MATERIALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NUCLEAR FACILITIES
ORES
OXIDES
OXYGEN COMPOUNDS
PROCESSING
PYROLYSIS
SODIUM COMPOUNDS
SULFATES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
URANIUM COMPOUNDS
050400* - Nuclear Fuels- Feed Processing