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An oxalic acid (H2C2O4) and hydrogen peroxide (H2O2) leaching–chemical precipitation process was developed to recover valuable metals from the spent acrylonitrile catalysts that primarily contain Mo, Ni, Fe and Bi. H2C2O4 and H2O2 leaching studies indicated good leaching efficiencies for Mo and very low efficiencies for Ni because of the formation of soluble molybdenum oxalate complexes and a nickel...
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