Many chemical compounds (bases, inorganic acids, salts) have been used to find a suitable
solvent for vanadium oxide And determine optimal conditions for its Dissolution.The best
of them was sodium hydroxide at 2M concentration. The solubility was
100% at 90 °C and
the solubilitys time was 30 min. The number of motor cycles was 800 cycles / min and the
liquid / solid ratio was 200 g / L.
In addition,the best amino protonadted compounds were used to precipitate vanadates from
their solutions (monoethanolamine, diphenylamine, hydrazine, hydroxide amine
hydrochloride, urea) with several inorganic acids (HCl, H2SO4, HNO3) and 1: 1 acid/base
was monoethanolamine protonated with concentrated sulfur acid .
A new acyclic Schiff Base(II), containing nitrogen-oxygen donor atoms was
synthesized by reaction of 1,2-Bis (5-bromo-2-formyl-phenoxy) ethane with 2-
(2-Aminoethyl)pyridine and characterized. The liquid-liquid extraction of
transition metals such
as Cu+2, Cr+3 and Uranyl-picrate (UO2)+2 from aqueous
phase to the organic phase was carried out using the novel ligand. The effect of
chloroform and nitrobenzene as organic solvents on the metal extractions was
investigated at 20oC by using Atomic Absorption and UV-visible
Spectrophotometry. The influence of pH, ligand concentration, ionic strength,
shaking time and ratio of aqueous-to-organic phases on extraction yield was
tested at 20oC. The extractability of the tested metal ions were valuated.
