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Synthetic plant type insulation oil and preparation method thereof

An insulating oil, plant-based technology, applied in the field of synthetic plant-based insulating oil and its preparation, can solve the problems of different quality and performance differences of plant-derived oil products

Inactive Publication Date: 2018-08-28
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plant-based transformer oil is derived from natural oil crops. Although the sources are extensive and the price is cheap, the quality and performance of plant-derived oils vary.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The present invention provides a kind of preparation method of synthetic plant type insulating oil described in above-mentioned technical solution, comprises the following steps:

[0036] Mix the mixed straight-chain fatty acid, polyol and catalyst, and carry out the esterification reaction at 160-200°C and vacuum degree of -0.04--0.06MPa to obtain the esterified product;

[0037] The esterification product and the additive are mixed, prepared at 100-120° C., and the vacuum degree is not greater than -0.093 MPa to obtain a synthetic vegetable type insulating oil.

[0038] The invention mixes the mixed straight-chain fatty acid, polyhydric alcohol and catalyst, carries out esterification reaction at 160-200 DEG C and a vacuum degree of -0.04-0.06 MPa, and obtains an esterification product. In the present invention, the types and amounts of the mixed straight-chain fatty acids, polyols and catalysts are consistent with the types and amounts of the mixed straight-chain fat...

Embodiment 1

[0044] Mix n-decanoic acid, n-octadecanoic acid, oleic acid, linoleic acid, linolenic acid, monopentaerythritol and sodium bisulfate to obtain the first mixture, and put the first mixture into the reaction kettle at 180°C with a vacuum of -0.05 The esterification reaction under MPa is 8-12 hours, and the esterification product is obtained; wherein, the molar ratio of n-decanoic acid, n-octadecanoic acid, oleic acid, linoleic acid, linolenic acid and monopentaerythritol is 1:2.9:0.6:0.2:0.1 : 1, the mass fraction of sodium bisulfate in the first mixture obtained by mixing is 0.1%.

[0045] The additive tert-butyl-p-diphenylamine, octylated phenyl-α-naphthylamine and benzotriazole are mixed with the esterification product obtained from the esterification reaction in a weight ratio of 1:1:0.1 to obtain a second mixture, The second mixture is adjusted and reacted at 100-120° C. with a vacuum degree of -0.097 MPa for 2-4 hours to obtain a synthetic vegetable type insulating oil; th...

Embodiment 2

[0048] Mix n-hexadecanoic acid, oleic acid, linoleic acid, linolenic acid, monopentaerythritol, dipentaerythritol and stannous oxalate to obtain the first mixture, and put the first mixture into the reaction kettle at 180°C with a vacuum of -0.06MPa The esterification reaction is carried out for 8-12 hours to obtain the esterified product; wherein, the molar ratio of n-hexadecanoic acid, oleic acid, linoleic acid, linolenic acid, monopentaerythritol and dipentaerythritol is 1.5:2.8:0.8:0.2:1:0.1 , the mass fraction of stannous oxalate in the first mixture obtained by mixing is 0.1%.

[0049] The additive diisooctyl diphenylamine, octylated phenyl-α-naphthylamine and benzotriazole are mixed with the esterification product obtained from the esterification reaction in a weight ratio of 1:1:0.1 to obtain a second mixture, The second mixture is adjusted and reacted at 100-120° C. with a vacuum degree of -0.097 MPa for 2-4 hours to obtain a synthetic vegetable type insulating oil; t...

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Abstract

The invention provides synthetic plant type insulation oil and a preparation method thereof. The insulation oil is prepared from an esterification product and additives, wherein the esterification product is prepared by reacting mixed straight-chain fatty acid and polyols under a catalyst according to a mass ratio of (2-6) to 1; the mixed straight-chain fatty acids are selected from any two or more of n-capric acid, n-hexadecanoic acid, n-octadecanoic acid, oleic acid, linoleic acid and linolenic acid; the polyols are selected from one or more of mono-pentaerythritol, dipentaerythritol, glycerinum and neopentyl glycol; the additives are selected from one or more of tert-butyl p-diphenylamine, di-iso-octyldiphenylamine, octylphenyl-alpha-naphthylamine, 2,6-di-tert-butyl-p-cresol, tetra(beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) pentaerythritol ester, di-iso-octyldiphenylamine polymer, benzotriazole, 2,5-di(tert-dodecyldithio)-1,3,4-thiadiazole and benzotriazole polymer. The synthetic plant type insulation oil has good low-temperature property, electrical property and oxidation stability.

Description

technical field [0001] The invention belongs to the technical field of plant-type insulating oil, and in particular relates to a synthetic plant-type insulating oil and a preparation method thereof. Background technique [0002] As an important liquid insulating material, transformer oil is compared to the blood in power generation and power supply equipment. It is mainly used for oil-immersed insulation of high-voltage equipment and has a history of more than 100 years. Mineral oil has the largest share in transformer oil, which has good insulation performance and thermal conductivity, and the cost is not high. However, with the improvement of the performance requirements of transformer oil, the shortcomings of mineral transformer oil such as low flash point, poor biodegradability, and non-renewability are gradually exposed. It cannot meet the requirements of high fire performance in places such as mines, military facilities and high-rise buildings. People have also been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M177/00C10N30/08C10N30/10C10N30/02C10N40/16
CPCC10M169/04C10M177/00C10M2207/283C10M2215/064C10M2215/065C10M2215/223C10M2219/106C10N2030/02C10N2030/08C10N2030/10C10N2040/16
Inventor 汤倩云刘月皞李萍赵玉贞马楷
Owner CHINA PETROLEUM & CHEM CORP
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