الفهرس 
Main compositions of Vanadium-bearing solution.Only 14 pages are availabe for public view
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Abstract
The work provides a hydrometallurgical study for the extraction of Vanadium and Nickel from boiler ash of El-Korimat thermal power station-Egypt. The boiler ash contains mainly 10%Vanadium and 7.3% Nickel. Two leaching routes acidic and alkaline have been applied. Using 1.5 M H2SO4 and 0.5 M H2O2 in a solid/liquid ratio of 1:5 for only 2 h at 95ºC the extraction efficiency reach 98.5% for Vanadium and about 61% for Nickel. While working with 2 M KOH together with 2% KClO3 in a solid/liquid ratio 1:5 for 3 h at 95ºC, the extraction efficiency of Vanadium become 99% with no co-extraction of nickel.
Several experimental series of both leaching experiments have also been oriented to study the leaching kinetics of the acidic circuit. It was thus revealed that the leaching kinetics of Vanadium is chemically controlled with apparent activation energy of 34.25kJ/mol.
While the leaching process has been simultaneously dissolved both Vanadium and Nickel, they have been successively extracted from their leach liquor. For this purpose, LIX 664N-LV diluted in kerosene was applied for Vanadium extraction at pH 1.5 and O/A 1:1 followed by Nickel extraction at pH 5.