EXTRACTION OF THORIUM BY A MIXTURE OF ETHYL ACETATE AND ACETONE
A method for extraction of thorium by a mixture of ethyl acetate and acetone, applicable to a wide range of thorium concentrations, was worked out. For this process quantities from 13 to 53 micrograms of thorium were used. The behavior of various cations and anions was examined, and a system for avoiding difficulties caused by zirconium was worked out. The method for determination of thorium is particularly efficient for materials with a low thorium content, using extraction by a mixture of ethyl acetate and acetone as separation method and the Thomason's colorimetric method for final determination. As the material contains larger quantities of thorium, the final determination can be done by the gravimetric method. Besides thorium, only uranium, zirconium, and bismuth were extracted among all the elements analyzed. To avoid difficulties caused by zirconium, the authors exploited its property to form complexes with tartaric acid which are not extracted. Uranium is extracted quantitatively, but during the determination of thorium by thorin it can be present in twenty times greater amounts. Bismuth does not interfere with the final determination. The method is simple, sufficiently rapid, and applicable to routine work. From materials with a complex composition, microgram quantities of thorium can be determined with an error usually below plus or minus 5%. This method has been used for more than one year and has given satisfactory results. (auth)
- Research Organization:
- Inst. for Tech. of Mineral Raw Materials, Belgrade
- NSA Number:
- NSA-13-006346
- OSTI ID:
- 4269983
- Report Number(s):
- A/CONF.15/P/474
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ACETATES
ACETONE
ALCOHOLS
ANIONS
BISMUTH
BISMUTH COMPOUNDS
CALORIMETERS
CATIONS
CHEMICALS
CHEMISTRY
COLOR
COMPLEXES
ENRICHMENT
ERRORS
ESTERS
ETHYL RADICALS
GRAVIMETRY
INTERFERING ELEMENTS
LIGHT
MINERALS
MIXING
OPERATION
ORGANIC ACIDS
PHOTOMETRY
QUALITATIVE ANALYSIS
QUANTITY RATIO
SOLVENT EXTRACTION
SOLVENTS
SPECTROSCOPY
TARTARIC ACID
THORIN
THORIUM
THORIUM COMPOUNDS
THORIUM ORES
TRACE AMOUNTS
URANIUM
URANIUM COMPOUNDS
URANIUM ORES
USES
ZIRCONIUM
ZIRCONIUM COMPOUNDS