Method for preparing bis(fluorosulfonyl)imide

A technology of lithium bisfluorosulfonimide and lithium bisfluorosulfonimide is applied in the field of preparation of lithium bisfluorosulfonimide, which can solve the problems of difficult purification, difficult separation, and potential safety hazards of products, and achieves The effect of easy industrial preparation and simple process route

Active Publication Date: 2014-07-09
浙江盛美リ電材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it has the following disadvantages: lithium perchlorate and lithium tetrafluoroborate as the reaction raw materials have great solubility in the solvent, resulting in lithium perchlorate and lithium tetrafluoroborate contained in the final lithium bisfluorosulfonyl imide product. Lithium fluoroborate is difficult to separate, and the product is not easy to purify
Moreover, friction or impact of lithium perchlorate can easily cause combustion or explosion, which brings greater safety hazards

Method used

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  • Method for preparing bis(fluorosulfonyl)imide
  • Method for preparing bis(fluorosulfonyl)imide
  • Method for preparing bis(fluorosulfonyl)imide

Examples

Experimental program
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Embodiment 1

[0031] Under the protection of dry nitrogen, add 219g (1mol) of bisfluorosulfonimide potassium salt, 194g (1mol) of lithium bisoxalate borate and 1000ml dimethyl carbonate into the three-necked flask, stir and react at room temperature for 12 hours, and filter under reduced pressure to remove insoluble After the filtrate was concentrated to about 150ml under reduced pressure, an equal volume of dichloromethane was added, and after cooling down to room temperature, 150g of lithium bisfluorosulfonimide was obtained after filtration, washing and drying.

[0032] The product has been tested by infrared, at 1387cm -1 ,1223cm -1 ,1185cm -1 ,852cm -1 ,777cm -1 , 573cm -1 By comparing the standard spectrum of bisfluorosulfonimide, it was determined to be the characteristic group of lithium bisfluorosulfonimide.

Embodiment 2

[0034] Under the protection of dry nitrogen, add 219g (1mol) of bisfluorosulfonimide potassium salt, 144g (1mol) of lithium oxalate difluoroborate and 1000ml dimethyl carbonate into the three-necked flask, stir and react at room temperature for 12 hours, and remove by filtration under reduced pressure For insoluble matter, the filtrate was concentrated to about 150ml under reduced pressure, then an equal volume of dichloromethane was added, and after cooling down to room temperature, 138g of lithium bisfluorosulfonyl imide was obtained after filtration, washing and drying.

[0035] The product has been tested by infrared, at 1387cm -1 ,1223cm -1 ,1185cm -1 ,852cm -1 ,777cm -1 ,573cm -1 By comparing the standard spectrum of bisfluorosulfonimide, it was determined to be the characteristic group of lithium bisfluorosulfonimide.

Embodiment 3

[0037] Under the protection of dry nitrogen, add 219g (1mol) of bisfluorosulfonimide potassium salt, 194g (1mol) of lithium bisoxalate borate and 1200ml of ethyl methyl carbonate to the three-necked flask, stir and react at room temperature for 12 hours, and filter under reduced pressure to remove insoluble After the filtrate was concentrated to about 165ml under reduced pressure, an equal volume of dichloromethane was added, and after cooling down to room temperature, 158g of lithium bisfluorosulfonimide was obtained after filtration, washing and drying.

[0038] The product has been tested by infrared, at 1387cm -1 ,1223cm -1 ,1185cm -1 ,852cm -1 ,777cm -1 , 573cm -1 By comparing the standard spectrum of bisfluorosulfonimide, it was determined to be the characteristic group of lithium bisfluorosulfonimide.

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Abstract

The invention relates to a method for preparing bis(fluorosulfonyl)imide, which is characterized in that double oxalate lithium borate or oxalate fluoboric acid lithium enables a metathesis exchange reaction with double fluorine sulfonyl imide potash to obtain the bis(fluorosulfonyl)imide product. The method for preparing bis(fluorosulfonyl)imide has a simple process route, and the industrialized production is easy to realize.

Description

technical field [0001] The present invention relates to a preparation method of lithium bisfluorosulfonyl imide, in particular to the preparation of bisfluorosulfonyl imide through the metathesis exchange reaction of lithium bisoxalate borate or lithium oxalate difluoroborate and potassium salt of bisfluorosulfonyl imide lithium amide. Background technique [0002] Lithium bisfluorosulfonyl imide can be used in various fields, for example, it can be used as an electrolyte additive for lithium-ion batteries to improve the cycle performance of lithium-ion batteries, it can also be used as an electrolyte for primary batteries; it can be used as a catalyst for polymerization reactions; it can also be used for Used as antistatic agent in industrial field. [0003] Lithium bisfluorosulfonimide referred to in the present invention is a compound with the following structure: [0004] [0005] Now studies have shown that lithium bisfluorosulfonyl imide is used in the electrolyte...

Claims

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Application Information

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IPC IPC(8): C01B21/093
CPCC01B21/0935C01P2002/82C01P2002/86
Inventor 张先林沈鸣杨志勇吴国栋周立星
Owner 浙江盛美リ電材料有限公司
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