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Preparation method of bis(trifluoromethane)sulfonimide-based lithium

A technology of lithium trifluoromethanesulfonyl imide and trifluoromethanesulfonyl, which is applied in the field of lithium battery electrolyte preparation, and can solve the problems such as the preparation method of bistrifluoromethanesulfonimide lithium that has not been retrieved

Inactive Publication Date: 2019-06-14
NANTONG ZHENGDA AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since lithium bistrifluoromethanesulfonyl imide can be used in lithium battery electrolyte, it is in great demand in China, but no related preparation method of lithium bistrifluoromethanesulfonyl imide has been retrieved at present.

Method used

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Embodiment

[0022] The preparation method of the bistrifluoromethanesulfonimide lithium of the present embodiment, the preparation method comprises the following steps:

[0023] Step 1: Dry and clean the 300L stainless steel autoclave, put 60.85kg of triethylamine into the autoclave under nitrogen protection, and turn on the cooling water to 20°C;

[0024] Step 2: When the temperature in the autoclave reaches 20°C, feed 50kg of trifluoromethanesulfonyl fluoride under stirring, the temperature in the autoclave is controlled at 25-30°C, and the pressure is 3kg; Inject 5kg of anhydrous ammonia, the temperature in the autoclave is controlled <35°C, the pressure is <5kg, intermittently introduced, and stirred for 18 hours after completion;

[0025] Step 3: After the stirring reaction in step 2 is completed, there is no pressure in the autoclave. Under cooling conditions, 70kg of water is added into the autoclave, and stirred rapidly for 1 hour to obtain material A;

[0026] Step 4: Discharge ...

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PUM

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Abstract

The invention relates to a preparation method of bis(trifluoromethane)sulfonimide-based lithium. The preparation method comprises the following steps: conveying triethylamine, anhydrous ammonia, trifluoromethyl sulfonyl fluoride, water, lithium hydroxide, methylbenzene and water to a stainless steel reaction kettle for reacting under a specific reaction condition to generate the bis(trifluoromethane)sulfonimide-based lithium. The preparation method of the bis(trifluoromethane)sulfonimide-based lithium has the advantages that appropriate raw materials are selected and reaction conditions are effectively controlled, so that the prepared bis(trifluoromethane)sulfonimide-based lithium can meet the requirements of large demand and can be used for lithium battery electrolytes.

Description

technical field [0001] The invention belongs to the technical field of lithium battery electrolyte preparation, and in particular relates to a preparation method of lithium bistrifluoromethanesulfonimide. Background technique [0002] Lithium bistrifluoromethanesulfonyl imide, molecular formula C 2 f 6 LiNO 4 S 2 , It needs to be used for lithium battery electrolyte in a dry, cool, airtight place, and inert gas environment. [0003] Since lithium bistrifluoromethanesulfonyl imide can be used in lithium battery electrolyte, it is in great demand in China, but no related preparation method of lithium bistrifluoromethanesulfonyl imide has been retrieved at present. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a method for preparing lithium bistrifluoromethanesulfonyl imide, and the prepared lithium bistrifluoromethanesulfonyl imide can meet the requirement of large demand. [0005] In order to solve the abov...

Claims

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Application Information

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IPC IPC(8): C07C303/38C07C303/44C07C311/48H01M10/0568
CPCY02E60/10
Inventor 钱灿明
Owner NANTONG ZHENGDA AGROCHEM
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