ALEXANDRIA, Va., May 19 -- United States Patent no. 12,630,900, issued on May 19, was assigned to ENGITEC TECHNOLOGIES S.P.A. (Novate Milanese, Italy).
"Method for recovering metal zinc from solid metallurgical wastes" was invented by Massimo Giuseppe Maccagni (Sesto San Giovanni, Italy), Edoardo Guerrini (Chiari, Italy) and Andrea Grassi (Sedriano, Italy).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for recovering metal zinc from a solid metallurgical waste containing zinc and manganese, may include: (a) bringing the solid metallurgical waste into contact with an aqueous leaching solution comprising chloride ions and ammonium ions to produce at least one leachate including zinc ions and manganese ...