氟代碳酸乙烯酯的提纯工艺研究

Study on Purification Process of Fluoroethylene Carbonate

氟代碳酸乙烯酯(FEC)的纯度对锂电池电解液的性能发挥有很大影响。通过考察不同溶剂的选择及用量、结晶方式、结晶温度、精馏方法、除水剂对提纯效果的影响,采用两次精馏处理或选取一次结晶处理后再进行精馏,均可制得满足市场需求的主含量为99.95%的高纯FEC产品。

The purity of fluoroethylene carbonate(FEC)has a great influence on the performance of lithium battery electrolyte.The effects of different solvent selection and dosage,crystallization method,crystallization temperature,distillation method and water removal agent on the purification effect are investigated.It can also choose two distillation treatment or select a crystallization treatment after distillation and can be prepared to meet the market demand of the main content of 99.95%high purity FEC products.