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    • 1. 发明申请
    • Catalyst For Direct Conversion Of Esters Of Lactic Acid To Lactide And The Method For Producing Lactide Using The Same
    • 用于将乳酸酯直接转化为丙交酯的催化剂以及使用该乳酸的乳酸的制备方法
    • US20100298578A1
    • 2010-11-25
    • US12563885
    • 2009-09-21
    • Jong-San ChangYoung-Kyu HwangJung-Ho LeeJong-Min LeeMin-Hee Jung
    • Jong-San ChangYoung-Kyu HwangJung-Ho LeeJong-Min LeeMin-Hee Jung
    • C07D319/12C07F7/28C01G23/02B01J21/06
    • C07D319/12
    • The present disclosure discloses a catalyst for directly producing a lactide which is a cyclic ester used as a monomer for polylactides, and a method for directly producing a lactide using the catalyst, the method including the transesterification reaction between two molecules of an ester of lactic acid or a mixture containing the ester of lactic acid with a small amount of lactic acid and oligomer of lactic acid under an inert environment in the presence of a titanium-based catalyst or a catalyst mixture containing the titanium-based catalyst so as to produce lactide while simultaneously removing an alcohol (ROH) generated as a by-product. As compared to a conventional commercialized process, since the method for producing a lactide in accordance with the present disclosure is a novel process capable of directly producing the lactide from the ester of lactic acid, energy consumption is low and the lactide can be produced through a simple process showing a high yield while maintaining optical property (D-form or L-form optical isomer).
    • 本公开公开了一种用于直接生产丙交酯的催化剂,其是用作聚交酯的单体的环状酯,以及使用该催化剂直接生产丙交酯的方法,包括两分子乳酸酯之间的酯交换反应的方法 或含有乳酸酯与少量乳酸和乳酸低聚物的混合物在惰性环境下,在钛基催化剂或含有钛基催化剂的催化剂混合物存在下,以产生丙交酯,同时 同时除去作为副产物产生的醇(ROH)。 与传统的商业化方法相比,由于根据本公开的制备丙交酯的方法是能够从乳酸酯直接生产丙交酯的新方法,能量消耗低,并且丙交酯可以通过 简单的方法在保持光学性质(D型或L型光学异构体)下显示高产率。
    • 2. 发明授权
    • Catalyst for direct conversion of esters of lactic acid to lactide and the method for producing lactide using the same
    • 用于将乳酸酯直接转化为丙交酯的催化剂以及使用其制备丙交酯的方法
    • US08258317B2
    • 2012-09-04
    • US12563885
    • 2009-09-21
    • Jong-San ChangYoung-Kyu HwangJung-Ho LeeJong-Min LeeMin-Hee Jung
    • Jong-San ChangYoung-Kyu HwangJung-Ho LeeJong-Min LeeMin-Hee Jung
    • C07D319/00
    • C07D319/12
    • The present disclosure discloses a catalyst for directly producing a lactide which is a cyclic ester used as a monomer for polylactides, and a method for directly producing a lactide using the catalyst, the method including the transesterification reaction between two molecules of an ester of lactic acid or a mixture containing the ester of lactic acid with a small amount of lactic acid and oligomer of lactic acid under an inert environment in the presence of a titanium-based catalyst or a catalyst mixture containing the titanium-based catalyst so as to produce lactide while simultaneously removing an alcohol (ROH) generated as a by-product. As compared to a conventional commercialized process, since the method for producing a lactide in accordance with the present disclosure is a novel process capable of directly producing the lactide from the ester of lactic acid, energy consumption is low and the lactide can be produced through a simple process showing a high yield while maintaining optical property (D-form or L-form optical isomer).
    • 本公开公开了一种用于直接生产丙交酯的催化剂,其是用作聚交酯的单体的环状酯,以及使用该催化剂直接生产丙交酯的方法,包括两分子乳酸酯之间的酯交换反应的方法 或含有乳酸酯与少量乳酸和乳酸低聚物的混合物在惰性环境下,在钛基催化剂或含有钛基催化剂的催化剂混合物存在下,以产生丙交酯,同时 同时除去作为副产物产生的醇(ROH)。 与传统的商业化方法相比,由于根据本公开的制备丙交酯的方法是能够从乳酸酯直接生产丙交酯的新方法,能量消耗低,并且丙交酯可以通过 简单的方法在保持光学性质(D型或L型光学异构体)下显示高产率。