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

Inactive Publication Date: 2017-01-25
江西天一特种油有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The present invention aims to solve the adverse effects of chlorobenzene compounds existing in the synthesis process of benzyltoluene on insulating oil and heat transfer oil, and further provide a preparation of low-chloride capacitor insulating oil and heat transfer oil different from traditional synthesis methods method

Method used

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  • Insulating oil for low-chloride capacitor and preparing method for conductive oil
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  • Insulating oil for low-chloride capacitor and preparing method for conductive oil

Examples

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Effect test

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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Abstract

The invention provides low-chloride capacitor insulation oil, conduction oil and a preparing method thereof. The capacitor insulation oil preparing method comprises the steps of mixing monobenzyl toluene and dibenzyl toluene by proportion evenly; making the mixture react with sodium hydride for 8-24h in temperature of 120-160oC and mixing rate of 250-300r/min; after completing the reaction, standing the reaction liquor and making it naturally cool down to room temperature, filtering materials and and recycling excessive sodium cyanide; slowly infusing water in some amount to the filter liquor in mixing and washing, drying and refining organic phase to get capacitor insulation oil. The insulation oil prepared in the method in the low-chloride capacitor insulation oil, conduction oil and preparing method thereof contains less than 15ppm of chloride and has good physical and chemical properties and electrical properties. Besides, the process of reaction is mild and easily controlled and the used catalyst is recyclable so as to prevent environmental pollution and reduce production cost.

Description

technical field [0001] The invention relates to a method for preparing low-chlorine capacitor insulating oil and heat-conducting oil, and belongs to the technical field of fine chemicals. Background technique [0002] In recent years, with the rapid expansion of the national grid, the country's investment in UHV power transmission and transformation has grown rapidly, and the national insulating oil consumption has continued to increase. Benzyltoluene has excellent physical, chemical and electrical properties, especially excellent partial discharge performance at low temperature, suitable for all-film capacitors and cold regions; it can also increase the design field strength, increase the capacity of the capacitor, and improve the specific characteristics of the capacitor , is currently the most widely used capacitor insulating oil. Due to the synthesis route and process, benzyltoluene inevitably contains a certain amount of chlorine. [0003] Benzyltoluene reacts benzyl ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M105/06C07C7/148C07C15/16C09K5/10B01J31/02C10N40/16
CPCB01J31/0279C07C7/148C09K5/10C10M105/06C10M2211/024C10N2030/41C10N2030/64C10N2040/16C10N2060/02C07C15/16Y02P20/584
Inventor 郑尧军
Owner 江西天一特种油有限公司
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