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    • 32. 发明申请
    • Production Process of Glycolide
    • 乙交酯的生产工艺
    • US20110263875A1
    • 2011-10-27
    • US13142012
    • 2009-12-09
    • Shigeru SuzukiKazuyuki YamaneToshihiko OnoKazuhiko Sunagawa
    • Shigeru SuzukiKazuyuki YamaneToshihiko OnoKazuhiko Sunagawa
    • C07D319/12
    • C07D319/12
    • The invention provides a production process of glycolide comprising the respective steps of: Step 1 of heating a mixture containing a glycolic acid oligomer and a high boiling polar organic under normal or reduced pressure to reflux the mixture and at that time, conducting a total reflux operation in a reflux time within a range of 0.1 to 20 hours under conditions that substantially the whole amount of a distillate distilled out of a reflux system containing the mixture is refluxed into the reflux system; Step 2 of heating the mixture after the total reflux operation or a mixture obtained by adding the high boiling polar organic solvent to a glycolic acid oligomer component recovered from the mixture after the total reflux operation to conduct depolymerization; and Step 3 of collecting glycolide from a co-distillate.
    • 本发明提供了一种乙交酯的制备方法,其包括以下各步骤:步骤1,在正常或减压下加热含有乙醇酸低聚物和高沸点极性有机物的混合物以回流混合物,并且此时进行总的回流操作 在从含有该混合物的回流系统蒸馏出的基本上全部量的馏出物回流至回流系统的条件下,在0.1至20小时的范围内的回流时间内, 在全部回流操作之后加热混合物的步骤2或通过在完全回流操作后从混合物中回收的乙醇酸低聚物组分加入高沸点极性有机溶剂而获得的混合物进行解聚; 和从共馏出物收集乙交酯的步骤3。
    • 37. 发明授权
    • Production process of glycolide
    • 乙交酯的生产过程
    • US08722907B2
    • 2014-05-13
    • US13142012
    • 2009-12-09
    • Shigeru SuzukiKazuyuki YamaneToshihiko OnoKazuhiko Sunagawa
    • Shigeru SuzukiKazuyuki YamaneToshihiko OnoKazuhiko Sunagawa
    • C07D319/00
    • C07D319/12
    • The invention provides a production process of glycolide comprising the respective steps of: Step 1 of heating a mixture containing a glycolic acid oligomer and a high boiling polar organic under normal or reduced pressure to reflux the mixture and at that time, conducting a total reflux operation in a reflux time within a range of 0.1 to 20 hours under conditions that substantially the whole amount of a distillate distilled out of a reflux system containing the mixture is refluxed into the reflux system; Step 2 of heating the mixture after the total reflux operation or a mixture obtained by adding the high boiling polar organic solvent to a glycolic acid oligomer component recovered from the mixture after the total reflux operation to conduct depolymerization; and Step 3 of collecting glycolide from a co-distillate.
    • 本发明提供了一种乙交酯的制备方法,其包括以下各步骤:步骤1,在正常或减压下加热含有乙醇酸低聚物和高沸点极性有机物的混合物以回流混合物,并且此时进行总的回流操作 在从含有该混合物的回流系统蒸馏出的基本上全部量的馏出物回流至回流系统的条件下,在0.1至20小时的范围内的回流时间内, 在全部回流操作之后加热混合物的步骤2或通过在完全回流操作后从混合物中回收的乙醇酸低聚物组分加入高沸点极性有机溶剂而获得的混合物进行解聚; 和从共馏出物收集乙交酯的步骤3。
    • 39. 发明申请
    • METHOD FOR PURIFICATION OF CYCLIC ESTER
    • 循环酶纯化方法
    • US20100168446A1
    • 2010-07-01
    • US12449669
    • 2008-01-28
    • Kazuyuki YamaneTomohiro HoshiTomoyuki Ogawa
    • Kazuyuki YamaneTomohiro HoshiTomoyuki Ogawa
    • C07D319/12
    • C07D319/12
    • A method of purifying a cyclic ester, comprising: mixing a co-distillated liquid comprising a cyclic ester produced by heating depolymerization of a hydroxycarboxylic acid oligomer in the presence of a depolymerization solvent and the depolymerization solvent with an organic solvent for washing which is mutually soluble with the depolymerization solvent and has a lower boiling point than the cyclic ester; subjecting the resultant mixture liquid to liquid-liquid separation into an organic solvent phase containing the depolymerization solvent and a cyclic ester phase containing the organic solvent; and then evaporating the organic solvent from the cyclic ester phase containing the organic solvent to recover the cyclic ester containing a reduced amount of the depolymerization solvent. As a result, purified cyclic ester is recovered at high heat efficiency, purification efficiency and operation efficiency, from the co-distillate liquid containing the depolymerization solvent and the cyclic ester from the depolymerization system for thermal decomposition of the hydroxycarboxylic acid oligomer in the presence of the depolymerization solvent.
    • 一种环状酯的提纯方法,其特征在于,包括:在解聚溶剂和解聚溶剂的存在下,通过将羟基羧酸低聚物的解聚反应与溶解有机溶剂进行溶解而得到的包含环状酯的共蒸馏液, 具有解聚溶剂并且具有比环酯低的沸点; 将所得混合液进行液 - 液分离成含有解聚溶剂的有机溶剂相和含有有机溶剂的环状酯相; 然后从含有机溶剂的环状酯相中蒸发有机溶剂,回收含有减少量的解聚溶剂的环状酯。 结果,从含有解聚溶剂的共馏出液和来自用于羟基羧酸低聚物的热分解的解聚体系的环状酯在高热效率,净化效率和操作效率下,在存在 解聚溶剂。
    • 40. 发明授权
    • Polyhydroxycarboxylic acid and its production process
    • 聚羟基羧酸及其生产工艺
    • US07067611B2
    • 2006-06-27
    • US10483039
    • 2002-07-05
    • Kazuyuki YamaneYukichika Kawakami
    • Kazuyuki YamaneYukichika Kawakami
    • C08G63/02
    • C08G63/80C08G63/08
    • Polyhydroxycarhoxylic acids are provided, which are controlled in terms of the rate of biodegradability, and give molded or otherwise formed articles that are of uniform quality with neither premature strength drop nor premature deterioration of retention of outside shape, and their production process is provided as well. The poly-hydroxycarboxylic acids are obtained by ring-opening polymerization of cyclic esters. The polyhydroxy-carboxylic acids have a weight-average molecular weight (Mw) in the range of 10,000 to 1,000,000, a molecular weight distribution in the range of 1.0 to 2.5 as represented by the weight-average molecular weight-to-number-average molecular weight ratio (Mw/Mn) and a yellowness index (YI) of 40 or less, and have a precisely controlled rate of biodegradability.
    • 提供了多羟基甲氧基酸,其以生物降解性的速率进行控制,并且得到具有均匀质量的成型制品或其它成型制品,既不过早强度下降也不会使外部形状保持力过早劣化,并且还提供其制造方法 。 多羟基羧酸通过环状酯的开环聚合得到。 多羟基羧酸的重均分子量(Mw)为10,000〜1,000,000,分子量分布范围为1.0〜2.5,以重均分子量与数均分子量 重量比(Mw / Mn)和黄色指数(YI)为40以下,具有精确控制的生物降解率。