ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,392,012, issued on Aug. 19, was assigned to EURECAT S.A. (La Voulte-sur-Rhone, France) and ECO'RING (Chambeon, France).
"Method for recovering metals contained in spent catalysts from ferro-alloys" was invented by Lionel Picard (Feurs, France) and Jean-Luc Roth (Metz, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention includes a method for treating a spent catalyst containing at least one refractory mineral oxide, one or more metals in the form of sulfide(s) chosen from the following metals: molybdenum, nickel, cobalt, tungsten, vanadium, and carbon compounds, the method comprising: a) in a smelting furnace preparing a melt of cast iron...