US Patent Issued to KOREA ZINC, KEMCO on Dec. 30 for "Method for preparing nickel sulfate aqueous solution from nickel-containing raw material" (South Korean Inventors)

ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,744, issued on Dec. 30, was assigned to KOREA ZINC Co. LTD. (Seoul, South Korea) and KEMCO (South Korea).

"Method for preparing nickel sulfate aqueous solution from nickel-containing raw material" was invented by Heon Sik Choi (Ulsan, South Korea) and Je Joong Lee (Seoul, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided herein is a method for preparing a nickel sulfate aqueous solution, comprising: (A-i) a reduction heat treatment process for thermally treating a first raw material containing nickel and lithium; (B) a first leaching process for leaching the heat-treated product produced by the reduction heat treatment process; (A-...