Changes in Vanadium Acid Radical Ions During Leaching From Petroleum Coke

摘要

The infrared spectrogram of vanadium leachate from petroleum coke was studied under different conditions. The change in vanadium acid radical ions in leachate was analyzed, and the three kinds of vanadate ions can be transformed while leaching condition was changed. When the leaching time was prolonged, the ion of vanadium dimer acid radical ions was formed to V-O chemical bond by depolymerization; when the leaching temperature increased, the ion of vanadium dimer V-O-V was exploded to V-O and V-OH chemical bond; when the leaching environment was under medium and low NaOH concentration, the V-OH was partly turned to vanadium dimer acid radical ions and V-O; and when the leaching environment was under high NaOH concentration, the leaching rate did not change essentially, and the ions remained unchanged. At last, the ions changing rules were further verified through the Raman spectrum of leachate under different NaOH concentrations.