US Patent Issued on Nov. 25 for "Noxious gas purificant and its preparation and purification method thereof" (Chinese Inventor)

ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,478,945, issued on Nov. 25.

"Noxious gas purificant and its preparation and purification method thereof" was invented by Liwei Huang (Hangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a noxious gas purificant and its preparation and purification method for removing nitrogen oxides from gas streams thereof. The preparing method is characterized in that: mixing, according to a predetermined ratio and a process, a salt of iron, manganese, cobalt, or copper, and a related derivative thereof, an alkali or alkaline substance and a related derivative thereof, water and a forming agent, so as to obtain a solid compound or m...