ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,434,973, issued on Oct. 7, was assigned to TALGA TECHNOLOGIES Ltd. (Cambridge, Great Britain).
"Graphite material purification process" was invented by Duncan Turner (Buderim, Australia).
According to the abstract* released by the U.S. Patent & Trademark Office: "A graphite material purification process comprising a pelletisation step, a caustic baking step providing a sintered product, a water leach step whereby impurity minerals are solubilised, forwarded for effluent treatment, and separated, a first sulphuric acid leach step wherein remaining impurity minerals are solubilised, forwarded for effluent treatment, and separated from leach solids, a hydrofluoric acid leach step wherein...