ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,545,634, issued on Feb. 10, was assigned to LG CHEM Ltd. (Seoul, South Korea).
"Method for preparing acrylic acid" was invented by Byeong Gil Lyu (Daejeon, South Korea), Mi Kyung Kim (Daejeon, South Korea), Eun Kyo Kim (Daejeon, South Korea) and Hye Bin Kim (Daejeon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a method for preparing an acrylic acid including: dehydrating a lactic acid aqueous solution in a reaction unit to prepare a reaction product stream; passing the reaction product stream through a cooling unit and a refining unit sequentially and supplying a discharge stream from the refining unit to an acrylic acid separ...