US Patent Issued to Ailin Dai on Aug. 19 for "Method for directly producing lithium carbonate and reducing sulfate radical content from lithium sulfate and sodium (potassium) carbonate" (Chinese Inventors)

ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,391,565, issued on Aug. 19, was assigned to Ailin Dai (Shanghai).

"Method for directly producing lithium carbonate and reducing sulfate radical content from lithium sulfate and sodium (potassium) carbonate" was invented by Qingsheng Wang (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for reducing sulphate content in various levels of lithium carbonate in spodumene sulfuric acid method includes the steps of using a process of "reverse feeding, no circulation of mother liquor" on the basis of various impurity removal methods for existing industrial grade and battery grade products; using a "supplementary pre-precipitation impurity remov...