THE ABSORPTIOMETRIC DETERMINATION OF THORIUM IN MISCELLANEOUS PLANT PRODUCTS INCLUDING ORES, CHEMICAL AND GRAVITY CONCENTRATES, URANIUM TRIOXIDE, AND VARIOUS PLANT STREAMS

Technical Report · Thu Apr 19 00:00:00 EST 1956

OSTI ID:4207363

Sackville, R C

This method covers the various initial treatments involved for each type of sample, and the common absorptiometric finish on the correctly adjusted final solutions that result. Ores, gravity concentrates, and mine leach precipitate are fused with sodium peroxide and three individual separations carried out involving causticperoxide,- ammonium hydroxide, and potassium iodate. Uranium trioxide and diuranate chemical precipitates are simply dissolved in acid and diluted to volume. Aqueous samples such as slurries, raffinates, scrub liquors, and 0. K. Liquors can generally be diluted and treated directly providing the rare earths are low relative to the thorium content. Solvent samples are stripped twice with water and diluted as required. Aliquots from these prepared solutions are then taken and the thorium precipitated as the fluoride on a lanthanum carrier. A large dilution factor and the fluoride precipitation serve to reduce or eliminate the majority of interfering cations. Fuming to dryness with perchloric acid removes the remaining anion interferences. The residue is taken up with HCl, hydroxylamine hydrochloride is added, and the orange-red color developed by the addition of thorin reagent. The absorbance of this thorium- thorin complex is measured at 545 m f UO/sub 2/ on a spectrophotometer. (auth)

• Research Organization: Eldorado Mining and Refining Ltd., Eldorado, Saskatchewan
• NSA Number: NSA-13-021956
• OSTI ID: 4207363
• Report Number(s): NP-7932; AM-117
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-59
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
ABSORPTION
ACIDITY
AMINES
AMMONIA
ANIONS
ARSENIC COMPOUNDS
CARRIERS
CATIONS
CHEMICAL REACTIONS
CHEMICALS
CHROMATOGRAPHY
COLOR
COMPLEXES
EXTRACTION COLUMNS
HIGH TEMPERATURE
HYDROCHLORIC ACID
HYDROXIDES
HYDROXYLAMINE
INTERFERING ELEMENTS
IODATES
ION EXCHANGE MATERIALS
LANTHANUM COMPOUNDS
LEACHING
LIGHT
MECHANICAL STRUCTURES
MELTING
MINERAL ACIDS
NAPHTHOL
ORE PROCESSING
ORES
ORGANIC NITROGEN COMPOUNDS
OXIDES
PERCHLORIC ACID
PEROXIDES
PHENYL RADICALS
PHOTOMETRY
POTASSIUM COMPOUNDS
PRECIPITATION
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
QUANTITY RATIO
RARE EARTHS
RECOVERY
SAMPLING
SEPARATION PROCESSES