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Preparation method of 1,4,5,8-octane tetranitrile

A technology of octane tetranitrile and succinonitrile, which is applied in the field of compound preparation, can solve the problems of industrialization difficulties, influence on battery performance, and low safety of preparation process, and achieve low battery life, prevent capacity reduction, and high acid value Effect

Active Publication Date: 2016-04-13
盘锦鑫百途新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional carbonate electrolyte will decompose above 4.5V, and the continuous decomposition of the electrolyte will seriously affect the performance of the battery. It is imminent to add electrolyte additives to the electrolyte to improve the performance of the battery.
In the prior art, metal sodium is used to participate in the reaction, which will lead to low safety of the entire preparation process and difficulty in industrialization

Method used

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  • Preparation method of 1,4,5,8-octane tetranitrile
  • Preparation method of 1,4,5,8-octane tetranitrile
  • Preparation method of 1,4,5,8-octane tetranitrile

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Step 1, adding potassium tert-butoxide and toluene into a reaction vessel, and dispersing into a uniform suspension, and then heating the suspension to 70°C;

[0028] Step 2, add succinonitrile to the suspension, keep the temperature of the suspension consistent with the temperature of step 1 during the process of adding succinonitrile, when a light yellow solid is precipitated, heat the reaction system to 100°C and continue the reaction for 5 hours , after the reaction is finished, add ice water to cool down to 5 degrees Celsius, then filter and wash the filter cake with water;

[0029] Step 3, add the filter cake obtained in step 2 to aqueous sodium hydroxide solution, then add toluene, tert-butylcatecholammonium chloride, and benzyltriethylammonium chloride in sequence and stir to obtain a mixed solution, and then add to the mixed solution Acrylonitrile, in the process of adding toluene, tert-butylcatecholammonium chloride, benzyltriethylammonium chloride and acrylon...

Embodiment 2

[0035] Step 1, adding potassium tert-butoxide and toluene into a reaction vessel, and dispersing into a uniform suspension, and then heating the suspension to 50°C;

[0036] Step 2, add succinonitrile to the suspension, keep the temperature of the suspension consistent with the temperature of step 1 during the process of adding succinonitrile, when a light yellow solid is precipitated, heat the reaction system to 80°C and continue the reaction for 1 hour , after the reaction is finished, add ice water to cool down to 10 degrees Celsius, then filter and wash the filter cake with water;

[0037] Step 3, add the filter cake obtained in step 2 to aqueous sodium hydroxide solution, then add toluene, tert-butylcatecholammonium chloride, and benzyltriethylammonium chloride in sequence and stir to obtain a mixed solution, and then add Acrylonitrile, in the process of adding toluene, tert-butylcatecholammonium chloride, benzyltriethylammonium chloride and acrylonitrile, the temperature...

Embodiment 3

[0043] Step 1, adding potassium tert-butoxide and toluene into a reaction vessel, and dispersing into a uniform suspension, and then heating the suspension to 60°C;

[0044] Step 2, add succinonitrile to the suspension, keep the temperature of the suspension consistent with the temperature of step 1 during the process of adding succinonitrile, when a light yellow solid is precipitated, heat the reaction system to 90°C and continue the reaction for 3 hours , after the reaction is finished, add ice water to cool down to 8 degrees Celsius, then filter and wash the filter cake with water;

[0045] Step 3, add the filter cake obtained in step 2 to aqueous sodium hydroxide solution, then add toluene, tert-butylcatecholammonium chloride, and benzyltriethylammonium chloride in sequence and stir to obtain a mixed solution, and then add to the mixed solution Acrylonitrile, in the process of adding toluene, tert-butylcatecholammonium chloride, benzyltriethylammonium chloride and acryloni...

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Abstract

The invention discloses a preparation method of 1,4,5,8-octane tetranitrile. 1,4,5,8-octane tetranitrile is prepared by adopting acrylonitrile and butanedinitrile as raw materials. The preparation method also has the advantages of high yield, easily-available raw materials, simplicity in reaction control, high product purity, and the like. The prepared material can form a film on the positive electrode surface to prevent transition metal ions from catalyzing electrolyte decomposition under high voltage, thus improving the battery performances.

Description

technical field [0001] The invention belongs to the technical field of compound preparation, and in particular relates to a preparation method of 1,4,5,8-octanetetranitrile. Background technique [0002] 1, 4, 5, 8-octane tetranitrile is mainly used as organic synthesis intermediate, high boiling point solvent, and electrolyte additive. At present, with the development of pure electric vehicles and electric bicycles, the energy density of lithium-ion batteries can no longer meet the demand. The development of high voltage is one of the future research directions. The traditional carbonate electrolyte will decompose above 4.5V, and the continuous decomposition of the electrolyte will seriously affect the performance of the battery. It is imminent to add electrolyte additives to the electrolyte to improve the performance of the battery. In the prior art, sodium metal is used to participate in the reaction, which will lead to low safety of the entire preparation process and d...

Claims

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Application Information

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IPC IPC(8): C07C253/30C07C253/34C07C255/05H01M10/0567
CPCC07C253/30C07C253/34H01M10/0567C07C255/05Y02E60/10Y02P20/52
Inventor 赵林桂
Owner 盘锦鑫百途新材料科技有限公司
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