Disclosed on November 9 (grant announcement date October 16), Sino-Platinum Metals and Yunnan Precious Metals Laboratory have obtained an invention patent (CN117921021B) for a method of recovering and preparing high-purity iridium powder from iridium residual targets and their machining waste. This adds another achievement to the patent portfolio for precious metal powder recovery processes, linking the high-purity demand for iridium powder in superalloys and precious metal catalysis to a closed-loop waste recovery pathway.