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    • 3. 发明申请
    • PROCESS FOR THE DESTILLATIVE PURIFICATION OF FLUOROETHYLENE CARBONATE
    • 氟代乙烯碳酸酯的目的化学纯化方法
    • WO2011020830A1
    • 2011-02-24
    • PCT/EP2010/061973
    • 2010-08-17
    • SOLVAY FLUOR GMBHLAMBERT, AlainSOMMER, ChristophKRUEGER, HaraldOLSCHIMKE, Jens
    • LAMBERT, AlainSOMMER, ChristophKRUEGER, HaraldOLSCHIMKE, Jens
    • C07D317/42
    • C07D317/42
    • Process for the destillative purification of fluoroethylene carbonate Crude fluoroethylene carbonate obtained by the fluorination of ethylene carbonate and elemental fluorine containing not more than 5 % by weight of HF is purified by at least two subsequent distillation steps. The bulk of HF can be removed, if desired,in a preliminary HF removal step, e.g. by stripping,before performing the distillation. Further,if desired, a second HF removal step can be performed by contacting the crude mixture or the distillate obtained after the first distillation step with an adsorbent for HF, e.g. silica gel. The distillation can be performed batch wise. It is preferred to perform it continuously. It yields purified fluoroethylene carbonate with an HF content of equal to or less than 30 ppm. The purified fluoroethylene carbonate can be applied as solvent additive for lithium ion batteries.
    • 氟代碳酸亚乙酯的游离纯化方法通过氟化碳酸亚乙酯和含有不超过5重量%HF的元素氟获得的粗氟代碳酸亚乙酯通过至少两个随后的蒸馏步骤纯化。 如果需要,可以在初步HF去除步骤中除去大部分HF。 通过汽提,然后进行蒸馏。 此外,如果需要,可以通过使在第一蒸馏步骤后获得的粗混合物或蒸馏物与HF的吸附剂接触来进行第二HF去除步骤,例如。 硅胶。 蒸馏可以分批进行。 优选连续执行。 产生HF含量等于或小于30ppm的纯化氟代碳酸亚乙酯。 纯化的碳酸亚乙酯可用作锂离子电池的溶剂添加剂。