Molybdenum, tungsten, vanadium, cobalt, nickel spent catalyst
Bismuth Oxide, Cobalt Oxide, Nickel Oxide, Indium Oxide, Tin Oxide, Tellurium Oxide, Antimony Oxide, Cadmium Oxide, Ferric Oxide, Manganese Oxide, Silicon Oxide, Molybdenum Oxide, Antimony Tin Oxide
Copper sheet & cathodes, copper , silica, cobalt , sulphur , manganese , lead, tellurium, nickel, aluminum, selenium, magnesium, antimony, zinc