US Patent Issued to Changzhou Ruihua Chemical Engineering Techonology Co. on May 27 for "Method for direct hydrogenation of maleic anhydride to produce 1,4-butanediol and co-produce succinic anhydride" (Chinese Inventors)

ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,321, issued on May 27, was assigned to Changzhou Ruihua Chemical Engineering Techonology Co. Ltd. (Changzhou, China).

"Method for direct hydrogenation of maleic anhydride to produce 1,4-butanediol and co-produce succinic anhydride" was invented by Juncheng Zhu (Changzhou, China), Zhigang Xu (Changzhou, China), Feike Wu (Changzhou, China), Chenggang He (Changzhou, China) and Zunliang Zhang (Changzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention discloses a method for direct hydrogenation of maleic anhydride to produce 1,4-butanediol and co-produce succinic anhydride, 1,4-butanediol is obtained by two-step hydrogenation using ma...