Electrolyte of medium-high voltage aluminum electrolytic capacitor and preparation method of solute thereof
A technology for aluminum electrolytic capacitors and electrolytes, which is applied in the field of preparation of electrolytes and their solutes, can solve the problems of affecting the performance and life of capacitors, affecting the life of capacitors, and poor low-temperature performance, achieving good low-temperature performance, high flashover voltage, The effect of good thermal stability
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[0062] Example 1:
[0063] 210g of dimethyl hexylmalonate (ie 0.97mol), 100g of methyl methacrylate (ie 1mol), 5g of sodium methoxide (ie 0.093mol), mix and stir, react at 90°C for 14 hours, neutralize to neutral After saponification, acidification, decarboxylation, and cleaning, 150g of 2-methyl-4-hexylglutaric acid was obtained by distillation under reduced pressure, with a yield of 67% (calculated as dimethyl hexylmalonate);
Example Embodiment
[0064] Example 2:
[0065] 435g (ie 2.3mol) of dimethyl butylmalonate, 250g (ie 2.5mol) of methyl methacrylate, 13.5g (ie 0.25mol) of sodium methoxide, mix and stir, and react at 85°C for 10 hours. After neutralization, distillation under reduced pressure, saponification, acidification, decarboxylation, and washing to obtain 360g of 2-methyl-4-butylglutaric acid, with a yield of 77% (calculated as dimethyl butylmalonate) ;
Example Embodiment
[0066] Example 3:
[0067] Make 2-methyl-4-hexylglutaric acid and ammonia into a normal ammonium salt, prepare a 5% ethylene glycol solution as an electrolyte, add 0.1% ammonium hypophosphite and 0.4% p-nitrobenzyl alcohol, and seal Constant temperature at 105℃ in stainless steel bottle;
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