ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,528,757, issued on Jan. 20, was assigned to TORAY INDUSTRIES Inc. (Tokyo).
"Method for producing adipic acid" was invented by Daijiro Tsukamoto (Kanagawa, Japan), Kenji Kawamura (Kanagawa, Japan), Katsushige Yamada (Kanagawa, Japan), Masato Akahira (Aichi, Japan) and Daisuke Yamamoto (Aichi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a method of producing adipic acid, including a step (hydrogenation step) of reacting 3-hydroxyadipic acid-3,6-lactone with hydrogen in an aqueous solvent in a presence of a hydrogenation catalyst. The hydrogenation catalyst preferably includes one kind or two or more kinds of trans...