ALEXANDRIA, Va., July 3 -- United States Patent no. 12,344,593, issued on July 1.
"Method melt crystallization for preparing high-purity glabridin" was invented by Anzhang Li (Guangzhou, China), Anning Wang (Guangzhou, China) and Lushi Cheng (Guangzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a melt crystallization method for preparing high-purity glabridin, belonging to the field of chemical purification technology. The method mainly includes steps of melt crystallization, sweating, and material melting. This invention adopts a fractionating melt crystallization method to purify glabridin. The melt crystallization method was utilized in the present invention for p...