Production method of electrolyte 2-butyl ammonium octanedioic acid
A technology of ammonium butyl suberate and a production method, applied in electrolytic capacitors, capacitor electrolytes/absorbents, organic material conductors and other directions, can solve the problems of low flash voltage, easy crystallization, increased electrolyte moisture, etc., and achieves wide operation. Temperature range, high flash voltage, improved purity effect
Inactive Publication Date: 2010-10-06
SHENZHEN CAPCHEM TECH CO LTD
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Problems solved by technology
After more than 20 years of development, these linear electrolytes cannot meet the needs of the production and development of electrolytic capacitors
Practice has shown that these electrolytes have the following defects in terms of performance: (1) their solubility in ethylene glycol is not more than 5%, and the low-temperature electrolyte is easy to crystallize, which affects the high-temperature life and low-temperature performance of the capacitor; (2) it is used to prepare The electrolyte has low conductivity and low flash fire voltage; (3) These organic ammonium salts are unstable and easily lose ammonia at high temperature and are reduced to organic acids, resulting in an increase in electrolyte moisture, a decrease in conductivity, and an increase in PH value
Method used
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Embodiment
[0015] ① The cyclohexanone raw material and excess anhydrous methanol are reacted by concentrated sulfuric acid and hydrogen peroxide to undergo nucleophilic addition, followed by ring opening to form free radicals. The molar ratio of the material is "cyclohexanone: anhydrous methanol: concentrated sulfuric acid: hydrogen peroxide=1: 5~6: 0.04: 0.8" (anhydrous methanol can adopt 5, 5.25, 5.5, 5.75, 6). The content requirements of raw materials are: cyclohexanone ≥ 99.5%, anhydrous methanol ≥ 99.5%, anhydrous methanol ≥ 99.5%, concentrated sulfuric acid ≥ 98%, and hydrogen peroxide = 30%. Reaction temperature is controlled at 50~60 ℃ (example 50,55,60 ℃), and reaction time is controlled at 40~60 minutes (example 40,50,60 minutes).
[0016] ② The reaction solution obtained in step ① is subjected to free radical polymerization in the presence of metal salts to obtain various polymers. The metal salt adopts ferrous sulfate with content ≥ 98%, and its feeding amount is "ferrous su...
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Abstract
The disclosed preparation method for 2-butyl ammonium suberate comprises: free radical polymerizing, rectifying, saponifying, adsorbing, reducing, drying and adding ammonia. This branched-chain product with 12 carbon atoms is fit to prepare the working electrolyte with 20.0+-0.5% concentration with high conductivity, high igniting voltage and other better performance, and is environmental friendly.
Description
(1) Technical field [0001] The invention relates to a production method for preparing a working electrolyte for an electrolytic capacitor, in particular to a production method for an electrolyte containing 2-butylammonium suberate. (2) Background technology [0002] Since the early 1980s, when most domestic enterprises produced medium and high voltage aluminum electrolytic capacitors, they generally used straight-chain organic acids with 10 to 20 carbon atoms and their ammonium salts to prepare working electrolytes, such as ammonium sebacate ( 10 carbons), ammonium dodecanoate (12 carbons), etc. After more than 20 years of development, these linear electrolytes cannot meet the needs of the production and development of electrolytic capacitors. Practice has shown that these electrolytes have the following defects in terms of performance: (1) their solubility in ethylene glycol is not more than 5%, and the low-temperature electrolyte is easy to crystallize, which affects the ...
Claims
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IPC IPC(8): H01G9/022H01G9/035C07C55/02H01B1/12
Inventor 李三华陈志锋
Owner SHENZHEN CAPCHEM TECH CO LTD