A low pour point environment-friendly transformer oil with good oxidation resistance

A technology of anti-oxidation performance and transformer oil, which is applied in the petroleum industry, fat oil/fat refining, lubricating composition, etc., can solve the problems of complicated preparation methods, unsuitable for large-scale production, and long cycle, etc., to improve the anti-oxidation performance , improve the structure and characteristics, improve the effect of the effect

Active Publication Date: 2022-02-22
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, "catalytic esterification" has involved the modification of insulating oil, and the oxidation resistance still needs to be further improved, and the preparation method is complicated and the cycle is too long, so it is not suitable for large-scale production

Method used

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  • A low pour point environment-friendly transformer oil with good oxidation resistance
  • A low pour point environment-friendly transformer oil with good oxidation resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A low pour point environment-friendly transformer oil with good anti-oxidation performance is composed of refined soybean insulating oil, polymethacrylate accounting for 1.0% of oil weight, 4,4-methylene (2.6-dimethacrylate) accounting for 0.5% of oil weight tert-butylphenol), the specific performance parameters are shown in Table 1.

[0032] The preparation process of the low pour point environment-friendly transformer oil with good oxidation resistance includes the following steps:

[0033] 1) Heat the refined soybean insulating oil to 72°C under 50r / min and -0.1Mpa vacuum conditions, add diatomaceous earth with an oil weight of 0.4%, and use the cycle mode of "ultrasonic dispersion for 2 minutes, stop for 3 minutes" for short-term ultrasonic dispersion Treatment, ultrasonic power 100W, ultrasonic frequency 24kHz, ultrasonic treatment time 10min, continuous stirring 30min, to obtain a mixture;

[0034] 2) Cool the mixture to 20°C at a cooling rate of 10°C / h under the...

Embodiment 2

[0039] A low pour point environment-friendly transformer oil with good oxidation resistance is composed of refined rapeseed insulating oil, polymethacrylate accounting for 1.2% of oil weight, 4,4-methylene (2.6- Di-tert-butylphenol) additive composition, specific performance parameters are shown in Table 1.

[0040] The preparation process of the low pour point environment-friendly transformer oil with good oxidation resistance includes the following steps:

[0041] 1) Heat the refined rapeseed insulating oil to 70°C under 45r / min and -0.098Mpa vacuum conditions, add diatomaceous earth with an oil weight of 0.5%, and use the cycle mode of "ultrasonic dispersion for 2 minutes, stop for 3 minutes" for short-term ultrasonic Dispersion treatment, ultrasonic power 120W, ultrasonic frequency 20kHz, ultrasonic treatment time 10min, continuous stirring 40min, to obtain a mixture;

[0042] 2) Cool the mixture to 22°C at a cooling rate of 8°C / h under the stirring condition of 25r / min. ...

Embodiment 3

[0047] A low pour point environment-friendly transformer oil with good oxidation resistance is composed of refined rapeseed insulating oil, polymethacrylate accounting for 0.5% of oil weight, alcohol ester type maleic anhydride-vinyl acetate accounting for 0.8% of oil weight - Styrene polymer, tert-butylhydroquinone 0.35% by weight of oil, 4,4-methylene (2.6-di-tert-butylphenol) 0.25% by weight of oil, sulfur 0.4% by weight of oil The additive composition of substituting dilauryl dipropionate, the specific performance parameters are shown in Table 1.

[0048] The preparation process of the low pour point environment-friendly transformer oil with good oxidation resistance includes the following steps:

[0049] 1) Heat the refined rapeseed insulating oil to 70°C under 40r / min and -0.096Mpa vacuum conditions, add diatomaceous earth with an oil weight of 0.35%, and use the cycle mode of "ultrasonic dispersion for 2 minutes, stop for 3 minutes" for short-term ultrasonic Dispersion...

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Abstract

The invention discloses a low pour point environment-friendly transformer oil with good oxidation resistance, which belongs to the technical field of insulating oil for transformers. 0.35-0.8% of 4,4-methylene (2.6-di-tert-butylphenol), can also be composed of natural ester insulating oil, polymethacrylate accounting for 0.5-0.75% of oil weight, accounting for 0.5% of oil weight ~0.8% alcohol ester type maleic anhydride-vinyl acetate-styrene polymer, 0.35-0.5% tert-butyl hydroquinone by weight of oil, 4,4-methylene by 0.2-0.5% by weight of oil (2.6-di-tert-butylphenol) and dilauryl thiodipropionate accounting for 0.2-0.4% of the oil weight. The invention has excellent physical, chemical and electrical properties, a pour point of less than -25°C, a total acid value of less than 0.3mgKOH / g after a 48h oxidation stability test, a dielectric loss factor (90°C) of less than 8%, good stability, and a simple preparation process. The technical advantages are obvious, fully meeting its application needs in most areas of my country, and the prospect of popularization and application is good.

Description

technical field [0001] The invention belongs to the technical field of insulating oil for transformers, and in particular relates to a low pour point environment-friendly transformer oil with good oxidation resistance. Background technique [0002] Insulating oil has the functions of insulation, heat dissipation and arc extinguishing in liquid-immersed high-voltage electrical equipment such as power transformers. Mineral insulating oil has excellent electrical insulation and cooling properties, and is inexpensive, and is widely used in power transformers. However, the flash point of mineral insulating oil is low, which cannot meet the high fire performance requirements of electrical equipment; the biodegradability is poor, and once leakage occurs, it will cause serious damage to the surrounding environment; and it is not renewable, and its future use and development are severely restricted. . Therefore, it is of great significance to seek a new insulating medium with high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04C10M171/00C11B3/10C11B3/00C10N40/16C10N30/10
CPCC10M169/044C10M171/00C11B3/10C11B3/001C11B3/008C10M2207/401C10M2207/026C10M2209/08C10M2205/04C10M2209/06C10M2209/062C10M2219/062
Inventor 杨涛王吉寇晓适杨威王栋李强吴明孝王震宇赵理孙鹏李雪桓付海金王广周
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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