ALEXANDRIA, Va., July 9 -- United States Patent no. 12,351,891, issued on July 8.
"Effective utilization of jarosite waste" was invented by Vinod Chintamani Malshe (Mumbai, India).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for recovery of metals from Jarosite waste for its effective utilization wherein, the treatment of nitric acid to jarosite waste extracts the nitrates of lead, cadmium, iron, copper, nickel, zinc, aluminum, manganese, cobalt, magnesium and calcium in the filtrate; the treatment of sulfuric acid to the residue obtained from step (a) extracts the metal in the form of ferrous sulfate, aluminum sulfate, zinc sulfate and calcium sulfate in the filtrate; and the treatment of alkali t...