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    • 14. 发明申请
    • Purification method of high-molecular-weight polyethylene glycol compound
    • 高分子量聚乙二醇化合物的纯化方法
    • US20100292515A1
    • 2010-11-18
    • US12751195
    • 2010-03-31
    • Yuji YamamotoHiroki Yoshioka
    • Yuji YamamotoHiroki Yoshioka
    • C07C43/178C07C43/11
    • C08G65/30
    • An impurity derived from a high-molecular-weight polyethylene glycol compound is removed from a high-molecular-weight polyethylene glycol compound whose total average number of moles of ethylene oxide units added in the molecule is 220 to 4500. In a state where the high-molecular-weight polyethylene glycol compound is dissolved in at least one of water and an organic solvent selected from aromatic hydrocarbon solvents having 8 or less carbon atoms in total and ester compound solvents having 5 or less carbon atoms in total, the water and the organic solvent are mixed. The resulting mixture was separated into an organic layer and an aqueous layer, and the organic layer is separated from the aqueous layer.
    • 从分子中加入的环氧乙烷单元的总平均摩尔数为220〜4500的高分子量聚乙二醇化合物除去来自高分子量聚乙二醇化合物的杂质。在高分子量聚乙二醇化合物 分子量的聚乙二醇化合物溶解在选自总共具有8个或更少碳原子的芳族烃溶剂和总共具有5个或更少碳原子的酯化合物溶剂的水和有机溶剂中的至少一种中,水和有机物 溶剂混合。 将所得混合物分离成有机层和水层,并将有机层与水层分离。