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 .
