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Application of liquid-liquid extraction in uranium hydrometallurgy (Paper No. : V-1)

Abstract

Uranium recovery from the ores is carried out exclusively by hydrometallurgical techniques. The initial solubilisation of uranium is achieved by either sodium carbonate or sulphuric acid leaching, the latter being more common. Further purification and upgrading of uranium from the sulphate liquors is carried out by an ion-exchange process. Solid resin type anion exchangers or liquid ion-exchangers are employed. The processing of uranium liquors is, perhaps, the first major application of liquid-liquid extraction in metal recovery. Organophosphoric acids were initially used but later the long-chain aliphatic amines have superseded them. The amine extraction system has been widely studied and several variations are now known. Chloride, nitrate, carbonate or sulphate or acid stripping can be used for getting back the uranium into the aqueous phase. Combination of ion exchange (resin type) and solvent extraction processes called Eluex processes are developed for special applications. Studies have also been made of solvent extraction of uranium from leach pulps instead of clear liquors. Tributylphosphate has found wide application in the refining of uranium concentrates to meet the stringent needs of nuclear purity. liquid-liquid extraction is, perhaps, the only successful technique for the recovery of uranium, as by-product, from wet-process phosphoric acid. This has opened  More>>
Publication Date:
Jan 01, 1979
Product Type:
Conference
Reference Number:
AIX-13-713600; EDB-83-022750
Resource Relation:
Conference: Symposium on solvent extraction of metals, Bombay, India, 1 - 2 Feb 1979; Related Information: Symposium on solvent extraction of metals (held at Bombay, February 1-2, 1979) : pre-prints of invited talks and contributed papers
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; URANIUM; SOLVENT EXTRACTION; URANIUM ORES; HYDROMETALLURGY; AMINES; FLOWSHEETS; HDEHP; ION EXCHANGE; KEROSENE; ORE PROCESSING; PHOSPHATE ROCKS; PHOSPHORIC ACID; PURIFICATION; URANIUM OXIDES U3O8; URANYL SULFATES; ACTINIDE COMPOUNDS; ACTINIDES; CHALCOGENIDES; DIAGRAMS; ELEMENTS; ESTERS; EXTRACTION; EXTRACTIVE METALLURGY; FUELS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; LIQUID FUELS; METALLURGY; METALS; ORES; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PETROLEUM PRODUCTS; PHOSPHORIC ACID ESTERS; PROCESSING; ROCKS; SEDIMENTARY ROCKS; SEPARATION PROCESSES; SULFATES; SULFUR COMPOUNDS; URANIUM COMPOUNDS; URANIUM OXIDES; URANYL COMPOUNDS; 050400* - Nuclear Fuels- Feed Processing
OSTI ID:
6634212
Country of Origin:
India
Language:
English
Submitting Site:
INIS
Size:
Pages: 18
Announcement Date:

Citation Formats

Murthy, T K.S., and Koppiker, K S. Application of liquid-liquid extraction in uranium hydrometallurgy (Paper No. : V-1). India: N. p., 1979. Web.
Murthy, T K.S., & Koppiker, K S. Application of liquid-liquid extraction in uranium hydrometallurgy (Paper No. : V-1). India.
Murthy, T K.S., and Koppiker, K S. 1979. "Application of liquid-liquid extraction in uranium hydrometallurgy (Paper No. : V-1)." India.
@misc{etde_6634212,
title = {Application of liquid-liquid extraction in uranium hydrometallurgy (Paper No. : V-1)}
author = {Murthy, T K.S., and Koppiker, K S}
abstractNote = {Uranium recovery from the ores is carried out exclusively by hydrometallurgical techniques. The initial solubilisation of uranium is achieved by either sodium carbonate or sulphuric acid leaching, the latter being more common. Further purification and upgrading of uranium from the sulphate liquors is carried out by an ion-exchange process. Solid resin type anion exchangers or liquid ion-exchangers are employed. The processing of uranium liquors is, perhaps, the first major application of liquid-liquid extraction in metal recovery. Organophosphoric acids were initially used but later the long-chain aliphatic amines have superseded them. The amine extraction system has been widely studied and several variations are now known. Chloride, nitrate, carbonate or sulphate or acid stripping can be used for getting back the uranium into the aqueous phase. Combination of ion exchange (resin type) and solvent extraction processes called Eluex processes are developed for special applications. Studies have also been made of solvent extraction of uranium from leach pulps instead of clear liquors. Tributylphosphate has found wide application in the refining of uranium concentrates to meet the stringent needs of nuclear purity. liquid-liquid extraction is, perhaps, the only successful technique for the recovery of uranium, as by-product, from wet-process phosphoric acid. This has opened up a new source of uranium.}
place = {India}
year = {1979}
month = {Jan}
}