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    • 3. 发明授权
    • Process for producing ethylene glycol catalyzed by ionic liquid
    • 由离子液体催化生产乙二醇的方法
    • US08658842B2
    • 2014-02-25
    • US13520008
    • 2010-06-07
    • Suojiang ZhangJian SunWeiguo ChengJinquan WangJianxin ZhangZengzeng FuXiangping Zhang
    • Suojiang ZhangJian SunWeiguo ChengJinquan WangJianxin ZhangZengzeng FuXiangping Zhang
    • C07C29/09
    • C07C29/106C07C29/12Y02P20/52C07C31/202
    • Disclosed is a process for producing ethylene glycol catalyzed by an ionic liquid, characterized in that the process includes the following three steps: (a) a carbonylation step of ethylene oxide and CO2 catalyzed by an ionic liquid composite catalyst comprising a hydroxyl functionalized ionic liquid and an alkali metal salt under an aqueous condition to produce ethylene carbonate and ethylene glycol; (b) a hydrolysis step of reacting the reaction solution containing ethylene carbonate and the ionic liquid composite catalyst obtained in step (a) with water to produce ethylene glycol; (c) a purification step of dehydrating and refining ethylene glycol from the aqueous solution containing ethylene glycol and the catalyst produced in step (b). The present process has the following advantages: the catalyst has high activity, high suitability, and good stability, the reaction condition is wild, the conversion of ethylene oxide is high, the selectivity of ethylene glycol is high, and the process is simple.
    • 公开了一种由离子液体催化的生产乙二醇的方法,其特征在于该方法包括以下三个步骤:(a)由包含羟基官能化的离子液体的离子液体复合催化剂催化的环氧乙烷和CO 2的羰基化步骤,和 在水溶液条件下制备碱金属盐以制备碳酸亚乙酯和乙二醇; (b)使含有碳酸亚乙酯的反应溶液和步骤(a)中得到的离子液体复合催化剂与水反应以产生乙二醇的水解步骤; (c)从含有乙二醇的水溶液和步骤(b)中制备的催化剂中脱水和精制乙二醇的纯化步骤。 本方法具有以下优点:催化剂活性高,适用性好,稳定性好,反应条件野生,环氧乙烷转化率高,乙二醇选择性高,工艺简单。