Selective Leaching of Valuable Metals from Spent Fluid Catalytic Cracking Catalyst with Oxalic Acid

The problem of spent fluid catalytic cracking (SFCC) catalyst resource utilization, draws more and attention to system analysis. SFCC was leached in an oxalic solution for comprehensive utilization. results showed that a D50 ≤ 17.34 μm, the 240 min at 95 °C presence 2 mol/L acid solution, extent leaching V, Ni, Fe, Al 73.4%, 32.4%, 48.2%, 36.8%, respectively. Studies on occurrence state main ions (V, Al) were presented. Additionally, separation from such by “solvent extraction-stripping-hydrothermal precipitation-comprehensive recovery valuable metal” process studied. immobilization rates vanadium nickel geopolymers can be obtained using toxicity characteristic procedure (TCLP) test, prepared residues considered non-hazardous material. A diagram utilization catalysts is