Non-polluting treatment of uraniferous effluents originating from an alkaline attack of a sulphur-containing uranium ore

Patent · Tue Dec 15 00:00:00 EST 1981

OSTI ID:5649564

Berger, B

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 fixing the uranium over a first strong anion-exchange resin, eluting it with an ammonium carbonate and/or bicarbonate solution in the form of an ammonium uranyl tricarbonate which is subsequently decomplexed, precipitating and calcinating the precipitated uranates and/or diuranates with regeneration of the eluant solution of ammonium carbonate and/or bicarbonate, passing the liquor which is freed from uranium and leaves the first strong anion-exchange resin into a neutralization zone then over a second anion-exchange resin, eliminating the SO/sub 4/= ions which are subsequently precipitated in calcium form, recycling a carbonate and/or bicarbonated liquor which is free from SO/sub 4/= ions to the attack of the ore, finally regenerating the elution liquor of SO/sub 4/= ions.

• Assignee: Pechiney Ugine Kulhmann
• Patent Number(s): US 4305911
• OSTI ID: 5649564
• Resource Relation: Patent Priority Date: Priority date 8 Feb 1978, France; Other Information: PAT-APPL-006331
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
SULFATES
REMOVAL
URANIUM
SOLVENT EXTRACTION
URANIUM ORES
ORE PROCESSING
CALCINATION
CHEMICAL EFFLUENTS
ION EXCHANGE MATERIALS
LEACHING
LIQUID WASTES
PRECIPITATION
RECOVERY
RECYCLING
REGENERATION
RESINS
SEPARATION PROCESSES
ACTINIDES
CHEMICAL REACTIONS
DECOMPOSITION
DISSOLUTION
ELEMENTS
EXTRACTION
MATERIALS
METALS
ORES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
PROCESSING
PYROLYSIS
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
WASTES
050400* - Nuclear Fuels- Feed Processing