Separation, recovery high purity V2O5 and MoO3 from waste catalyst of petrochemisty with vanadium and molybdenum

摘要

A method for separating and recovering high purity V2O5 and MoO3 from waste petrochemical catalysts containing vanadium and molybdenum is provided to recover V2O5 and MoO3 having a high purity of 99% or more at a lower energy cost compared with a conventional method by introducing a solvent extraction process that is capable of selectively extracting and concentrating molybdenum and vanadium at room temperature and atmospheric pressure. A method for separating and recovering high purity V2O5 and MoO3 from waste petrochemical catalysts containing vanadium and molybdenum comprises: roasting a waste petrochemical catalyst such as a desulfurization catalyst containing vanadium and molybdenum at a high temperature; water leaching the roasted waste petrochemical catalyst into an aqueous solution; and selectively extracting vanadium and molybdenum from the aqueous solution at a room temperature and an atmospheric pressure through a solvent extraction process and a concentration process to obtain effectively V2O5 and MoO3 with a high purity of at least 99% at a recovery ratio of at least 99%. The solvent extraction process comprises extracting vanadium and molybdenum selectively and continuously at room temperature and atmospheric pressure by using a solvent at solvent extraction conditions including 2 to 3 extraction stages, 2 to 3 reverse extraction stages, mixing time of 1 to 2 minutes, and a layer separation time of 10 to 30 minutes, the solvent being prepared by diluting 20 to 30 wt.% of TIOA(tri-isooctylamine) into kerosene as a diluent, thereby obtaining a diluted solution in which a phase ratio of the solvent to the aqueous solution is 1:1.