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二氟草酸硼酸锂的提纯工艺

Henan Chemical Industry(2020)

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Abstract
二氟草酸硼酸锂(LiDFOB)生产过程的副产物四氟硼酸锂(LiBF4)难以去除,现有方案为多次结晶提高纯度,但产品收率低且成本高.研究了溶剂、溶剂用量、溶解温度、析晶方式对提纯效果的影响.结果表明:乙酸乙酯作为提纯溶剂,1.3倍添加量、溶解温度55℃、二氯甲烷作为析晶剂条件下,一次结晶即可得到纯度99.8%,收率为93.5%的LiDFOB.通过优化工艺,能够实现降本增效.
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