- New process of bis-trifluoro sulfonimide salt
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The invention provides a preparation method of a bis-trifluoro sulfonimide salt. The method comprises the following steps of S1, preparing corresponding N-alkyl-substituted bis-trifloromethane sulfonimide with primary amine and trifluoromethyl sulfonic anhydride; S2, reacting the N-alkyl-substituted bis-trifloromethane sulfonimide with a salt to obtain a crude product; S3, crystallizing the crudeproduct and then drying the crude product in vacuum to obtain the bis-trifloromethane sulfonimide salt. The method has the advantages that N-alkyl-substituted bis-trifloromethane sulfonimide is stablein property and does not generate corrosive substances in a whole reaction process, three wastes are hardly generated, the method is suitable for large-scale production, the high-purity battery-gradebis-trifloromethane sulfonimide salt can be obtained, and a high implementation value and considerable social and economic benefits are acquired.
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Paragraph 0075; 0076; 0077; 0078
(2019/06/12)
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- Preparation method of LiN(CF3SO2)2 salt
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The invention discloses a preparation method of LiN(CF3SO2)2 salt. The preparation method comprises the following steps: benzene methanamine is dissolved in an organic solvent and subjected to a sulfonamide reaction with trifluoromethyl sulfonyl chloride or trifluoromethyl sulfonyl fluoride, benzyl bis(trifluoromethyl sulfamide) is obtained and reduced, and bis(trifluoromethyl sulfamide) is obtained; the obtained bis(trifluoromethyl sulfamide) and resin lithium are subjected to ion exchange in an anhydrous solvent, and a final product LiN(CF3SO2)2 salt is obtained. According to the method, raw materials are low in price and easy to obtain, reaction procedures are simple, the yield is high, nearly no pollution is caused, rigid and dangerous reaction conditions are avoided, the product is easy to purify, and the method is suitable for large-scale production in China.
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Paragraph 0050; 0051; 0054
(2018/02/04)
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- A simple access to metallic or onium bistrifluoromethanesulfonimide salts
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Numerous salts of the (CF3SO2)2N- anion, called TFSI, were prepared according to an original one-pot procedure. First, N-benzyl trifluoromethanesulfonimide (N-benzyl triflimide) was treated with ethanol to form
- Arvai, Roman,Toulgoat, Fabien,Langlois, Bernard R.,Sanchez, Jean-Yves,Médebielle, Maurice
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experimental part
p. 5361 - 5368
(2009/12/01)
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