公开(公告)号：KR1020130112462A

公开(公告)日：2013-10-14

申请号：KR1020120034860

申请日：2012-04-04

Applicant: 현대자동차주식회사

Inventor： 홍채환 ,  김시환 ,  서지연 ,  한도석

IPC: C07D319/12 ,  B01J23/10

CPC classification number: C07D319/12

Abstract: PURPOSE: A method for producing lactide form lactate is provided to obtain high purity lactide with high yield by treating lactate with a specific solvent, adding a catalyst, and phase separation, thereby largely lowering costs of polylactide acid. CONSTITUTION: A method for producing lactide comprises the steps of: converting a lactate solution into lactide under the presence of a first organic solvent which enables azeotropic distillation with water; performing phase separation of the converted product into a second organic solvent and a water mixture; and extracting an isolated organic phase and evaporating the solvents. [Reference numerals] (AA) Lactate solution; (BB) Mix the lactate solution and xylene; (CC) Catalysis of lactate solution and xylene compound; (DD) Mix reactant of the previous step, ethyl acetate and water; (EE) Phase separation after extract reaction and evaporation; (FF) Collect solid phase lactide

Abstract translation: 目的：提供一种生产丙交酯乳酸盐的方法，通过用特定溶剂处理乳酸盐，加入催化剂和相分离，从而大大降低聚丙交酯酸的成本，以高产率获得高纯度丙交酯。 构成：生产丙交酯的方法包括以下步骤：在与水共沸蒸馏的第一有机溶剂的存在下将乳酸盐溶液转化为丙交酯; 将转化产物相分离成第二有机溶剂和水混合物; 并萃取分离的有机相并蒸发溶剂。 （AA）乳酸盐溶液; （BB）混合乳酸溶液和二甲苯; （CC）乳酸溶液和二甲苯化合物的催化; （DD）混合前一步反应物，乙酸乙酯和水; （EE）提取反应和蒸发后的相分离; （FF）收集固相丙交酯