ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,133, issued on Dec. 9, was assigned to LG Chem Ltd. (Seoul, South Korea).
"Method for purifying of waste water" was invented by Suk Yung Oh (Daejeon, South Korea), Yong Heon Cho (Daejeon, South Korea), Joo Sik Oh (Daejeon, South Korea), Jun Seok Ko (Daejeon, South Korea), Kyeong Hyeon Jo (Daejeon, South Korea) and Seung Whan Oh (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for purifying of waste water includes: supplying a mixed stream, in which wastewater including water, a nitrile-based monomer, and ammonia and an acid component are mixed, to a first column; condensing an upper discharge stream of the first column, s...