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Preparation method of vegetable insulating oil

A vegetable insulating oil, insulating oil technology, applied in insulators, organic insulators, organic liquid insulators and other directions, can solve the problems of high viscosity, high freezing point, low flash point, etc., to improve high viscosity, reduce freezing point, and comprehensive performance. Effect

Inactive Publication Date: 2015-01-07
CHINA ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vegetable insulating oil provided by the invention has good physical and chemical properties and electrical properties. While meeting the basic requirements of transformer oil, it solves the problems of high viscosity and high freezing point of refined vegetable oil in patents CN101538505A and CN101538500A, and solves the problems of patent In CN101230304A, the problem of low flash point of esterified alcoholyzed vegetable oil further optimizes the process, saves raw materials and improves operability

Method used

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  • Preparation method of vegetable insulating oil

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Refined soybean oil and methanol are selected as raw materials, and the ratio of alcohol to oil is 4:1. Add 5% vegetable oil quality sodium hydroxide into methanol, heat to 60°C, and stir for 30 minutes until the sodium hydroxide is completely dissolved in the alcohol. Add soybean oil, install a condensing reflux device, control the temperature at 60°C, and react for 30 minutes. After the reaction was completed, the layers were left to stand, the lower glycerin phase was discarded, the upper liquid was repeatedly washed with water and separated until the eluate was neutral, and the residual saponins were filtered off. Distill under reduced pressure for 30min at a pressure of 0.5~10mmHg at a temperature of 90°C. Add activated clay with 3% oil quality, heat under reduced pressure for 30min at 90°C and 0.5~10mmHg, and filter. Add activated clay with 1% oil mass, heat under reduced pressure at 90°C and 0.5~10mmHg for 30min, and filter. Add basic alumina with 2% oil quali...

Embodiment 2

[0040] The refined rapeseed oil and tert-butanol are selected as raw materials, and the ratio of alcohol to oil is 8:1. Add 5% vegetable oil quality sodium hydroxide into methanol, heat to 60°C, and stir for 30 minutes until the sodium hydroxide is completely dissolved in the alcohol. Add rapeseed oil, install a condensing reflux device, control the temperature at 80°C, and react for 6 hours. After the reaction, the liquid was repeatedly washed with water until the eluate was neutral, and the residual saponins were filtered off. Distill under reduced pressure for 30 minutes under the pressure of 0.5~10mmHg, and the temperature is 110℃. Add activated clay with 5% oil mass, heat under reduced pressure at 90°C and 0.5~10mmHg for 30min, and filter. Add activated clay with 3% oil quality, heat under reduced pressure for 30min at 110°C and 0.5~10mmHg, and filter. Add alkaline montmorillonite with 2% oil quality, stir at 80°C for 60min, and filter. Add 0.2% of oil quality 2,6-di-...

Embodiment 3

[0042] The refined peanut oil and ethanol are selected as raw materials, and the ratio of alcohol to oil is 4:1. Add 5% vegetable oil quality sodium hydroxide into methanol, heat to 60°C, and stir for 30 minutes until the sodium hydroxide is completely dissolved in the alcohol. Add peanut oil, install a condensing reflux device, control the temperature at 70°C, and react for 1 hour. After the reaction, the liquid was repeatedly washed with water until the eluate was neutral, and the residual saponins were filtered off. Distill under reduced pressure for 30min at a pressure of 0.5~10mmHg at a temperature of 90°C. Add activated clay with 5% oil mass, heat under reduced pressure at 90°C and 0.5~10mmHg for 30min, and filter. Add activated clay with 5% oil mass, heat under reduced pressure at 90°C and 0.5~10mmHg for 30min, and filter. Add oil quality 3% triethanolamine, stir at 40°C for 120min, and filter. Add 0.15% tert-butyl hydroquinone, 0.05% citric acid and 0.2% polymethac...

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Abstract

The invention relates to vegetable insulating oil based on vegetable oil, and a preparation method of the vegetable insulating oil. The insulating oil is prepared by the steps of using refined vegetable oil as raw material, carrying out ester exchange reaction on low-molecular alcohol, refining and washing after the reaction, rinsing, distilling under reduced pressure in order to remove water and alcohol, de-coloring, de-acidifying, filtering, de-watering deeply, finally adding antioxidant and pour point depressant. The insulating oil prepared by the method has the characteristics of high flashing point, low viscosity, low pour point, low acidity, low brackish water content, excellent dielectric constant, low dielectric loss and high breakdown voltage and has good physical and chemical performance and electrical performance.

Description

Technical field [0001] The invention involves a plant insulation oil and preparation method with vegetable oil as the raw material. Background technique [0002] Insulation oil is an important liquid insulation material. It is mainly used in electrical equipment such as various electrical resistors, transformers, oil immersed power transformers, etc., and eliminating the air gap in the equipment through immersion and filling to eliminate the strength of the insulation electrical strength.At the same time, it can improve the heat dissipation performance of the equipment and has a direct impact on the safe operation of the power system. [0003] At present, the most widely used insulating oil in power equipment in various countries is mineral insulation oil.Mineral insulating oil is mainly made of natural oil.The electrical insulation and cooling properties of mineral insulation oil are good, and the cost is not high. Therefore, it has a history of more than 100 years of applicatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B3/20H01B19/00C10M105/40C10N40/16
Inventor 陈江波蔡胜伟周翠娟郭慧浩张曦杜砚伍志荣尹晶邵苠峰
Owner CHINA ELECTRIC POWER RES INST
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