ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,370, issued on Nov. 3, was assigned to UMICORE (Brussels).
"Copper electrowinning process" was invented by Tom Hennebel (Hoboken, Belgium), Hans Grade (Hoboken, Belgium), Daan Hofman (Hoboken, Belgium) and Frederik Verhaeghe (Hoboken, Belgium).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention concerns a copper electrowinning process suitable for the production of enhanced-quality cathodes from highly contaminated electrolytes. The process is performed in electrowinning cells including a plurality of anodes and cathodes, equipped with gas sparging elements at their bottom. It comprises the step of sparging gas across the cathodes, an...