| 摘要 |
<p>A process for the high-yield recovery of vanadium from petroleum combustion residues, wherein these residues are: (a) subjected to attach with sodium hydroxide in the presence of an oxidizer, or (b) impregnated with sodium hydroxide, dried at 100 DEG -250 DEG C. and leached with water, to selectively extract vanadium with high yields. The vanadium is precipitated from the alkaline extract by adding H2SO4 up to pH APPROX 2 and an ammonium salt. The precipitated ammonium polyvanadate is calcinated to vanadium pentoxide.</p> |
