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A kind of high-performance composite additive for natural ester insulating oil and preparation method thereof

A compound additive and high-performance technology, applied in the petroleum industry, lubricating compositions, etc., can solve the problems of not effectively improving the performance of natural ester insulating oil, achieve good oxidation resistance, simple preparation process, and easy industrial production.

Active Publication Date: 2022-07-19
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

[0007] However, the above-mentioned patents only improve the anti-oxidation performance of natural ester insulating oil by simply adding antioxidants, and do not effectively improve other properties of natural ester insulating oil, such as low-temperature characteristics (pour point), etc.

Method used

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  • A kind of high-performance composite additive for natural ester insulating oil and preparation method thereof

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Embodiment 1

[0030] A high-performance composite additive for natural ester insulating oil, which is composed of naphthenic transformer oil, antioxidant, pour point depressant and metal passivator, wherein the antioxidant tert-butyl hydroquinone accounts for 10% of the weight of the additive, and the anti-oxidant Oxidant 4,4 methylene (2.6-di-tert-butylphenol) accounts for 8% of the additive weight, pour point depressant hexylnaphthalene accounts for 8% of the additive weight, pour point depressant polymethacrylate accounts for 5% of the additive weight, The metal deactivator benzotriazole derivatives accounted for 8% by weight of the additive.

[0031] The preparation method is as follows:

[0032] 1) Under the vacuum conditions of 100r / min and -0.096Mpa, the naphthenic transformer oil was heated to 75℃, and after stirring for 30min, the antioxidant of the above proportion was slowly added. Ultrasonic dispersion treatment, ultrasonic power 100W, ultrasonic frequency 30kHz, ultrasonic tre...

Embodiment 2

[0037] A high-performance composite additive for natural ester insulating oil, which is composed of naphthenic transformer oil, antioxidant, pour point depressant and metal passivator, wherein the antioxidant tert-butyl hydroquinone accounts for 11% of the weight of the additive, and the anti-oxidant The oxidant tetrakis[beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol accounts for 8% of the additive weight, the pour point depressant octylnaphthalene accounts for 9% of the additive weight, the pour point depressant polymer Acrylic acid higher alcohol ester accounts for 5% by weight of the additive, and the metal deactivator benzotriazole derivative accounts for 8% by weight of the additive.

[0038] The preparation method is as follows:

[0039] 1) Under the vacuum conditions of 80r / min and -0.1Mpa, heat naphthenic transformer oil to 72℃, and after stirring for 35min, slowly add the antioxidant in the above proportion, and at the same time adopt the cycle...

Embodiment 3

[0044] A high-performance composite additive for natural ester insulating oil, which is composed of polyalphaolefin synthetic oil, antioxidant, pour point depressant and metal passivator, wherein antioxidant tetrakis[beta-(3,5-di-tert-butyl-4 -Hydroxyphenyl) propionic acid] pentaerythritol ester accounts for 10% by weight of additives, antioxidant 4,4 methylene (2.6-di-tert-butylphenol) accounts for 10% by weight of additives, pour point depressant octyl naphthalene accounts for 10% by weight of additives 15% of the metal passivator methyl benzotriazole derivative accounts for 8.5% of the additive weight;

[0045] The preparation method is as follows:

[0046] 1) Heat the polyalphaolefin synthetic oil to 72°C under vacuum conditions of 100r / min and -0.1Mpa, stir for 30min and slowly add the antioxidants in the above proportions. Ultrasonic dispersion treatment, ultrasonic power 160W, ultrasonic frequency 36kHz, ultrasonic treatment time 15min, continuous stirring for 40min; ...

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Abstract

The invention discloses a high-performance composite additive for natural ester insulating oil and a preparation method thereof, belonging to the technical field of insulating oil additives. The invention is composed of base oil, antioxidant, pour point depressant and metal passivator. 18-25% by weight, the pour point depressant accounts for 13-20% by weight of the additive, and the metal passivator accounts for 8-10% by weight of the additive. The antioxidant, metal passivator and pour point depressant of the invention can effectively improve the anti-oxidation performance and low-temperature characteristics of the natural ester insulating oil, inhibit metal corrosion, and the synergistic effect between the additives can further improve the efficiency of the additives , prolong the service life of additives.

Description

technical field [0001] The invention relates to the technical field of insulating oil additives, in particular to a high-performance composite additive for natural ester insulating oil and a preparation method thereof. Background technique [0002] As an important liquid insulating medium, insulating oil is mainly used in high-voltage equipment such as transformers, circuit breakers and bushings to improve the electrical insulation strength of the equipment, improve the heat dissipation performance of the equipment and extinguish the arc. The insulating oil widely used in the power system at present is a petroleum product obtained by refining a specific fraction, that is, mineral insulating oil. However, mineral insulating oil has low flash point, poor biodegradability, non-renewable, and faces the threat of oil shortage, which severely restricts its future use and development. [0003] In recent years, with the gradual enhancement of people's awareness of environmental pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04C10N40/16C10N30/08C10N30/10C10N30/12
CPCC10M169/048C10M2203/1065C10M2207/026C10M2203/06C10M2209/08C10M2215/223C10M2207/2805C10M2207/289C10M2209/084C10M2205/0206
Inventor 杨涛王吉付刚杨晓辉王天姚德贵郭磊赵书杰王伟肖寒姚伟马德英任欢
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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