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Selective leaching of uranium, vanadium and phosphorus from phosphate ore with hydrochloric acid

Journal Article · · Metall. Trans., B; (United States)
DOI:https://doi.org/10.1007/BF02668415· OSTI ID:5114901
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The selective leaching of uranium, vanadium, and phosphorus from phosphate ore may be useful in by-product recovery. Experimental results have shown that it is possible to preferentially remove uranium from phosphate ore using dilute HCl (0.05 M). 93% of the uranium is leached within 90 min, leaving 94% of the phosphorus and 82% of the vanadium unattacked. Phosphorus may then be removed by increasing the pH. The apparent activation energies and orders for the leaching reactions were found. For uranium, the apparent order with respect to H/sup +/ is 1.05 and the apparent activation energy is 7750 J. The apparent order for the leaching of the vanadium minerals with respect to H/sup +/ is 1.93 and the apparent activation energy is 12,800 J. The phosphorus reaction has an apparent order, with respect to H/sup +/, of 1.98 and an apparent activation energy of 10,200 J. The uranium readsorbs at longer times. The readsorption reaction is a function of temperature, particle size, and H/sup +/ concentration. Two methods of selectivity analysis were used in the analysis of the data - end point analysis and initial rate analysis. 17 figures.
Research Organization:
Univ. of Idaho, Moscow
OSTI ID:
5114901
Journal Information:
Metall. Trans., B; (United States), Journal Name: Metall. Trans., B; (United States) Vol. 11B:2; ISSN MTTBC
Country of Publication:
United States
Language:
English

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Related Subjects

050400* -- Nuclear Fuels-- Feed Processing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
ACTINIDES
ACTIVATION ENERGY
BY-PRODUCTS
DISSOLUTION
ELEMENTS
ENERGY
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LEACHING
METALS
NONMETALS
ORE PROCESSING
PH VALUE
PHOSPHATE ROCKS
PHOSPHORUS
PROCESSING
RECOVERY
ROCKS
SEDIMENTARY ROCKS
SEPARATION PROCESSES
TRANSITION ELEMENTS
URANIUM
VANADIUM