US Patent Issued to POLYWIN on Oct. 27 for "Process for the production of lactide" (Singaporean Inventor)

ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,774,271, issued on Oct. 27, was assigned to POLYWIN PTE. LTD. (Singapore).

"Process for the production of lactide" was invented by Jianjun Sui (Singapore).

According to the abstract* released by the U.S. Patent & Trademark Office: "This invention relates to a process for the continuous production of optically pure lactide from an aqueous solution of lactic acid by means of two reactive distillations followed by a main distillation column with a side-draw refluxer. The first reactive distillation is used for the preparation of lactic acid oligomers and the second reactive distillation used for the depolymerization of the thus obtained lactic acid oligomers to lactide. The crude lactid...