公开(公告)号：US20210230352A1

公开(公告)日：2021-07-29

申请号：US15734645

申请日：2019-06-05

申请人： WOORI FINE CHEM CO., LTD.

发明人： Dal Seong KIM ,  Oh Joon KWON ,  Sung Gi LEE ,  Gyeong Ha CHOI ,  Junghwan SHIN

IPC分类号： C08G18/76 ,  G02B1/04 ,  C07C263/10 ,  C08F2/06

摘要： Provided is a method for manufacturing diisocyanate and an optical lens in which, during the manufacture of diisocyanate from diamine via diamine hydrochloride, use is made of an aqueous hydrochloric acid solution and an organic solvent instead of hydrogen chloride gas and solid-phase triphosgen instead of phosgen gas while reaction conditions are controlled, whereby the diisocyanate of high quality can be manufactured at excellent yield, with the causation of less environmental problems.