基本信息:
- 专利标题： GLYCOLIDE PRODUCTION PROCESS, AND GLYCOLIC ACID COMPOSITION
- 专利标题（中）：甘醇酸生产方法和甘醇酸组合物
- 申请号：PCT/JP0202025 申请日：2002-03-05
- 公开(公告)号：WO02070508A3 公开(公告)日：2002-12-19
- 发明人： YAMANE KAZUYUKI , KAWAKAMI YUKICHIKA
- 申请人： KUREHA CHEMICAL IND CO LTD , YAMANE KAZUYUKI , KAWAKAMI YUKICHIKA
- 专利权人： KUREHA CHEMICAL IND CO LTD,YAMANE KAZUYUKI,KAWAKAMI YUKICHIKA
- 当前专利权人： KUREHA CHEMICAL IND CO LTD,YAMANE KAZUYUKI,KAWAKAMI YUKICHIKA
- 优先权： JP2001062436 2001-03-06
- 主分类号： C07B61/00
- IPC分类号： C07B61/00 ; C07D319/12 ; C08G63/08 ; C08G63/00 ; C08G63/06
摘要：
The invention provides a process for producing glycolide by depolymerization by heating of a glycolic acid oligomer in the presence or absence of a solvent, which process ensures stable depolymerization. The depolymerization reaction is carried out while the content of alkaline metal ions in a glycolic acid oligomer-containing depolymerization reaction system is controlled to 0.001% by mass or lower; a sulfate or an organic acid salt, each in the form of di- or poly-valent cations, or a mixture thereof is allowed to be present as a stabilizer in the depolymerization reaction system; or the content of alkaline metal ions in the depolymerization reaction system is controlled to 0.001% by mass or lower, and a sulfate or an organic acid salt, each in the form of di- or poly-valent cations, or a mixture thereof is allowed to be present as a stabilizer in the depolymerization reaction system.
摘要（中）：
本发明提供了通过在存在或不存在溶剂的情况下通过加热乙醇酸低聚物进行解聚来生产乙交酯的方法，该方法确保了稳定的解聚。 解聚反应在将含有羟基乙酸低聚物的解聚反应体系中的碱金属离子的含量控制在0.001质量％以下的同时进行; 各自为二价或多价阳离子形式的硫酸盐或有机酸盐或其混合物允许在解聚反应体系中作为稳定剂存在; 或解聚反应体系中的碱金属离子的含量被控制为0.001质量％以下，并且允许各自以二价或多价阳离子形式或其混合物形式的硫酸盐或有机酸盐 在解聚反应体系中作为稳定剂存在。