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Hydrogen eliminating agent, preparation method thereof, and aluminum electrolytic capacitor electrolyte

A hydrogen elimination agent and solvent technology, which is applied in the field of electrochemical capacitor electrolyte, can solve the problems of poor solubility, flash fire voltage influence, etc., and achieve excellent hydrogen elimination effect, good stability, and excellent solubility.

Active Publication Date: 2019-02-26
HUIZHOU CAPCHEM CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The object of the present invention is to provide a hydrogen getter, aiming to solve the problems of poor solubility and influence on the flash voltage of the existing hydrogen getter in the electrolytic solution of aluminum electrolytic capacitors, etc.

Method used

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  • Hydrogen eliminating agent, preparation method thereof, and aluminum electrolytic capacitor electrolyte
  • Hydrogen eliminating agent, preparation method thereof, and aluminum electrolytic capacitor electrolyte
  • Hydrogen eliminating agent, preparation method thereof, and aluminum electrolytic capacitor electrolyte

Examples

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preparation example Construction

[0083] The preparation method of described hydrogen remover comprises the following steps at least:

[0084] In the presence of a catalyst, the first reaction raw material and the second reaction raw material are added to the solvent, and the reaction is carried out at 60°C to 160°C;

[0085] Subsequently, the solvent is removed, and the reaction product containing the hydrogen suppressant is obtained through cooling and separation;

[0086] Wherein, the structural formula of the first reaction raw material is shown in formula IV,

[0087] (R 14 ) m -Ph-R 15 COR 16 ...Formula IV;

[0088] Among them, R 14 for nitro, R 15 An organic group selected from 0 to 5 carbon atoms; R 16 An organic group with 1 to 5 carbon atoms; m=1 or 2;

[0089] The second reaction raw material is polyhydric alcohol.

[0090] Next, the above preparation method will be further explained.

[0091] Specifically, the preparation route of the hydrogen remover of the present invention is as follo...

Embodiment 1

[0111] A preparation method of a hydrogen remover for aluminum electrolytic capacitors, comprising the following steps:

[0112] Weigh 60g of xylene, 44.6g (0.2mol) of 2,4-dinitropropiophenone, and 13.6g (0.22mol) of ethylene glycol into a 250ml three-neck flask, stir well and add 1.7g of p-toluenesulfonic acid (0.01mol), add a reflux dewatering device at the mouth of the flask, and heat to 110°C for reflux reaction for 5h;

[0113] Solvent was distilled off after completion;

[0114] The reaction product was distilled under reduced pressure, and the resulting product was 47g. After sampling and detection, the product was mainly 2-methyl-2-(2-nitrotoluene)-1,3-dioxolane, which was denoted as S1, and the total The yield is about 88%.

Embodiment 2

[0116] A preparation method of a hydrogen remover for aluminum electrolytic capacitors, comprising the following steps:

[0117] Weigh 60g of xylene, 33g (0.2mol) of 4-nitroacetophenone, and 16.7g (0.22mol) of 1,3-propanediol and add them to a 250ml three-neck flask, stir well and add 4g (0.01mol) of iron sulfate, Add a reflux dewatering device at the mouth of the flask, and heat to 120°C for reflux reaction for 6 hours;

[0118] Solvent was distilled off after completion;

[0119] The reactant was stirred and cooled to room temperature, and filtered out after the solid precipitated to the maximum;

[0120] The filtrate was stirred in a suitable solvent for extraction and layered, the extractant was separated and removed, washed with pure water for 3 times, and dried to remove water to obtain 40 g of the product.

[0121] After sampling and detection, the product is mainly 2-methyl-2-(4-nitrobenzene)-1,3-dioxane, which is denoted as S2, and the total yield is about 89%.

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Abstract

In order to solve problems that the dissolving performance of the current hydrogen eliminating agent for an aluminum electrolytic capacitor is poor and flash fire voltage will be affected, the invention provides a hydrogen eliminating agent. The structural formula of the hydrogen eliminating agent comprises at least one kind of a compound A shown in the formula I and a compound B shown in the formula II. The solubility of the hydrogen eliminating agent in the aluminum electrolytic capacitor electrolyte reaches 7% or more. When the additive amount of the electrolyte reaches 7%, the hydrogen eliminating agent will not be separated out from the electrolyte and other components in the electrolytic will not be separated out. By adding the hydrogen eliminating agent in the electrolyte, the conductivity and flash fire voltage of the electrolyte will not be affected at all; the gas production quantity is small; and electrolyte shows good hydrogen elimination performance.

Description

technical field [0001] The invention belongs to the technical field of electrochemical capacitor electrolyte, and in particular relates to a hydrogen remover, a preparation method thereof, and an aluminum electrolytic capacitor electrolyte. Background technique [0002] The oxygen needed for the repair of the anodic oxide film of the capacitor comes from the electrolysis of water, so hydrogen gas will inevitably be precipitated at the cathode. When the capacitor has too much hydrogen evolution, it will cause the internal pressure of the capacitor to rise, and in severe cases, the bottom of the drum will be caused, and even the explosion-proof valve will be opened. Therefore, in existing capacitors, it is necessary to add a hydrogen remover that can effectively suppress or eliminate hydrogen to the electrolyte. [0003] Hydrogen remover for capacitors is also called hydrogen absorber or getter or explosion-proof agent. There are many types of such additives, such as compoun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/035H01G9/145C07D317/16C07D319/06C07C205/34
CPCC07C205/34C07D317/16C07D319/06H01G9/035H01G9/145
Inventor 郑仲天何天虔
Owner HUIZHOU CAPCHEM CHEM CO LTD
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