Insulating oil for low-chloride capacitor and preparing method for conductive oil
A capacitor and insulating oil technology, which is applied in the field of preparation of low-chlorine capacitor insulating oil and heat transfer oil, can solve problems such as the adverse effects of insulating oil and heat transfer oil, and achieve a mild and easy-to-control reaction process, few by-products, and easy adjustment of the ratio Effect
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Embodiment 1
[0034] This embodiment is used to illustrate the preparation method of the capacitor insulating oil provided by the present invention.
[0035] Put 8kg of benzyltoluene mixture with a chlorine content of 690ppm and 800g of sodium hydride catalyst into a 10L reactor, start stirring at a stirring speed of 250r / min, turn on the heater, raise the temperature to 120°C, and keep the temperature for 24 hours; The material in the kettle was cooled to below 50°C, and the reaction liquid was filtered; the filtrate was refined to obtain low-chlorine capacitor insulating oil, with a chlorine content of 12.0ppm, and other physical and chemical performance indicators and electrical performance indicators were all qualified.
Embodiment 2
[0037] This embodiment is used to illustrate the preparation method of the capacitor insulating oil provided by the present invention.
[0038] Put 8kg of benzyltoluene mixture with a chlorine content of 690ppm and 800g of sodium hydride catalyst into a 10L reactor, start stirring at a stirring speed of 300r / min, turn on the heater, raise the temperature to 120°C, and keep the temperature for 24 hours; The material in the kettle is cooled to below 50°C, and the reaction liquid is filtered; the filtrate is refined to obtain low-chlorine capacitor insulating oil, the chlorine content is 9.0ppm, and other physical and chemical performance indicators and electrical performance indicators are all qualified.
Embodiment 3
[0040] This embodiment is used to illustrate the preparation method of the capacitor insulating oil provided by the present invention.
[0041] Put 8kg of benzyltoluene mixture with a chlorine content of 690ppm and 800g of sodium hydride catalyst into a 10L reactor, start stirring at a stirring speed of 300r / min, turn on the heater, and raise the temperature to 120°C, and keep the temperature for 16 hours; The material in the kettle is cooled to below 50°C, and the reaction liquid is filtered; the filtrate is refined to obtain low-chlorine capacitor insulating oil, the chlorine content is 10.0ppm, and other physical and chemical performance indicators and electrical performance indicators are all qualified.
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