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Antioxidant of a class of natural ester insulating oil and its application

A technology of antioxidants and natural esters, applied in the direction of additives, petroleum industry, lubricating compositions, etc., to achieve the effect of improving antioxidant capacity

Active Publication Date: 2020-09-18
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these antioxidants often only quench the free radicals generated during the oxidation of insulating oil, and do not block the free radical chain reaction from the source

Method used

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  • Antioxidant of a class of natural ester insulating oil and its application
  • Antioxidant of a class of natural ester insulating oil and its application
  • Antioxidant of a class of natural ester insulating oil and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Oil sample: soybean oil; antioxidant: benzoquinone

[0028] Add 1% benzoquinone by mass to the re-steamed soybean oil, stir evenly, place it in an ultrasonic oscillator with a frequency of 100kHz for 30min, and use the insulating oil oxidation stability test method (NB / SH / T0811-2010) to test evaluate. According to the NB / SH / T 0811-2010 standard, first clean the oxidation tube and dry it for later use; select a copper wire with a length of 91cm and a diameter of 1mm, polish the surface, and then wind it into a spiral shape and put it into the oxidation tube; Inject (25±0.1)g insulating oil test sample into each oxidation tube, pass dry air at a constant speed at a flow rate of (2.5±0.25)mL / min, continue oxidation at 120°C for 48h, and measure the total amount of the oxidized oil product. The acid value, kinematic viscosity increase value and dielectric loss factor were used to evaluate its antioxidant capacity.

Embodiment 2

[0030] Oil sample: soybean oil; antioxidant: 3,5-di-tert-butyl-1,2-p-benzoquinone

[0031]Add 1% by mass of 3,5-di-tert-butyl-1,2-p-benzoquinone to the re-distilled soybean oil, stir evenly, put it into an ultrasonic oscillator with a frequency of 100kHz for 30min, and oxidize it with insulating oil Stability test method (NB / SH / T 0811-2010) for evaluation. Change the reaction temperature to 80 degrees, the duration is 48h, and react with air bubbling. After the reaction, the acid value, viscosity and dielectric loss of the oil sample were measured.

Embodiment 3

[0033] Oil sample: soybean oil; antioxidant: tetramethyl-1,4-benzoquinone

[0034] Add 1% tetramethyl-1,4-benzoquinone by mass to the re-distilled soybean oil, stir evenly, place it in an ultrasonic oscillator with a frequency of 100kHz for 30min, and use the insulating oil oxidation stability test method (NB / SH / T 0811—2010) for evaluation. Change the reaction temperature to 40 degrees, the duration is 48h, and react with air bubbling. After the reaction, the acid value, viscosity and dielectric loss of the oil sample were measured.

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PUM

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Abstract

The invention belongs to the field of insulating oil additives, and particularly discloses natural ester insulating oil antioxidants and an application thereof, in particular to an application of benzoquinone or a derivative of benzoquinone as antioxidants to improvement of oil insulativity. Correspondingly, natural ester insulating oil with improved oxidation resistance can be obtained and comprises a natural ester insulating oil matrix and the antioxidant added to the natural ester insulating oil matrix; specifically, the antioxidant is benzoquinone or the derivative of benzoquinone. Benzoquinone or the derivative of benzoquinone is adopted as the antioxidants for application, oxidation resistance and insulativity of oil can be improved when the antioxidants are added to oil substances,particularly, oxidation resistance of insulating oil such as the natural ester insulating oil and the like can be improved, so that degeneration of insulativity and heat dissipation performance of theinsulating oil is delayed, and normal use of the insulating oil is guaranteed; besides, the natural ester insulating oil antioxidants such as benzoquinone or the derivative of benzoquinone require asmall adding quantity, are convenient to add and have a good antioxidant effect when applied.

Description

technical field [0001] The invention belongs to the field of insulating oil additives, and more specifically relates to a class of natural ester insulating oil antioxidants and applications thereof. Background technique [0002] Insulating oil is widely used in various high-voltage equipment, which can effectively improve the heat dissipation capacity and insulation strength of the equipment, and at the same time isolate the air to prevent the equipment from being oxidized and soaked in moisture. At present, the insulating oil used in the power system of various countries is derived from a specific fraction of petroleum products, that is, mineral insulating oil. With the rapid depletion of fossil raw materials, it is urgent to seek renewable resources to replace insulating oil based on petroleum products. Natural ester insulating oils derived from vegetable oils have attracted widespread attention due to their good fire performance, high biodegradability, delaying the aging...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M129/24C10N30/10C10N40/16
CPCC10M129/24C10M2207/08C10M2207/401C10N2030/10C10N2040/16
Inventor 尹国川陈江波曾淼蔡胜伟陈程邵苠峰
Owner HUAZHONG UNIV OF SCI & TECH