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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  • 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 lithi

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
Comparison scheme
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Example Embodiment

[0030] Example 1

[0031] Under the protection of dry nitrogen, add 219g (1mol) of bisfluorosulfonimide potassium salt, 194g (1mol) of lithium bisoxalate borate, and 1000ml of dimethyl carbonate into a three-necked flask. Stir and react at room temperature for 12 hours. Filter under reduced pressure to remove insoluble After the filtrate is concentrated to about 150 ml under reduced pressure, an equal volume of dichloromethane is added, and the mixture is cooled to room temperature and filtered, washed, and dried to obtain 150 g of lithium bisfluorosulfonimide.

[0032] The product has been inspected by infrared, at 1387cm -1 ,1223cm -1 ,1185cm -1 ,852cm -1 ,777cm -1 , 573cm -1 By comparing the standard spectra of bisfluorosulfonimide, it is determined as the characteristic group of bisfluorosulfonimide lithium.

Example Embodiment

[0033] Example 2

[0034] Under the protection of dry nitrogen, add 219g (1mol) of bisfluorosulfonimide potassium salt, 144g (1mol) of lithium oxalate difluoroborate and 1000ml of dimethyl carbonate into a three-necked flask, stir and react at room temperature for 12 hours, and remove by filtration under reduced pressure. Insoluble matter, the filtrate was concentrated to about 150ml under reduced pressure, and then an equal volume of dichloromethane was added. After cooling to room temperature, it was filtered, washed, and dried to obtain 138g of lithium bisfluorosulfonimide.

[0035] The product has been inspected by infrared, at 1387cm -1 ,1223cm -1 ,1185cm -1 ,852cm -1 ,777cm -1 ,573cm -1 By comparing the standard spectra of bisfluorosulfonimide, it is determined as the characteristic group of bisfluorosulfonimide lithium.

Example Embodiment

[0036] Example 3

[0037] Add 219g (1mol) of bisfluorosulfonimide potassium salt, 194g (1mol) of lithium bisoxalate borate and 1200ml of ethyl methyl carbonate to a three-necked flask under the protection of dry nitrogen. Stir and react at room temperature for 12 hours. 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 the mixture was cooled to room temperature and filtered, washed, and dried to obtain 158g of lithium bisfluorosulfonimide.

[0038] The product has been inspected by infrared, at 1387cm -1 ,1223cm -1 ,1185cm -1 ,852cm -1 ,777cm -1 , 573cm -1 By comparing the standard spectra of bisfluorosulfonimide, it is determined as the characteristic group of bisfluorosulfonimide lithium.

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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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