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    • 65. 发明授权
    • Process for the preparation of ethylene glycol carbonate
    • 制备乙二醇碳酸酯的方法
    • US5350862A
    • 1994-09-27
    • US984789
    • 1992-12-03
    • Paul WagnerHans-Josef BuyschAlexander KlausenerFranz-Josef MaisChristine Mendoza-Frohn
    • Paul WagnerHans-Josef BuyschAlexander KlausenerFranz-Josef MaisChristine Mendoza-Frohn
    • C07B61/00C07D317/38C07D317/36
    • C07D317/38
    • A process is described for the catalytic preparation of ethylene glycol carbonate by reaction of ethylene oxide and CO.sub.2 in ethylene glycol carbonate as the reaction medium at elevated temperature and at elevated pressure with work-up by distillation to separate the resulting ethylene glycol carbonate from the catalyst. The process is carried out continuously under adiabatic temperature conditions. Per unit of time, ethylene glycol carbonate as reaction medium runs into the reactor in a amount 10 to 120 times that of ethylene glycol carbonate formed per unit of time. A CO.sub.2 excess over the other reaction partner ethylene oxide is maintained at all sites of the reactor. 80 to 98% by weight of the reaction mixture flowing out is returned to the inlet of the reactor, while the remainder is worked up by distillation to give ethylene glycol carbonate. The sensible heat produced in the reaction product as a result of the adiabatic temperature conditions, is used for the work-up.
    • 描述了通过环氧乙烷和CO 2在乙二醇碳酸酯中作为反应介质在升高的温度和升高的压力下反应制备乙二醇碳酸酯的方法,通过蒸馏进行后处理以将所得的乙二醇碳酸酯与催化剂分离 。 该过程在绝热温度条件下连续进行。 每单位时间,作为反应介质的乙二醇碳酸酯以每单位时间形成的乙二醇碳酸酯的量的10至120倍的量进入反应器。 在反应器的所有位置保持超过其他反应对象环氧乙烷的二氧化碳剩余量。 将流出的反应混合物的80〜98重量%返回到反应器的入口,其余部分通过蒸馏处理得到乙二醇碳酸酯。 作为绝热温度条件的结果,在反应产物中产生的显热用于后处理。