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Natural ester insulating liquid

A technology of insulating liquid and natural ester, applied in the petroleum industry, lubricating composition, etc., can solve the problems of low flash point and low freezing point

Active Publication Date: 2022-01-04
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are technologies that disclose environmentally friendly insulating oils that use vegetable oil as raw materials. Although some environmentally friendly insulating oils prepared have high ignition points and flash points, their freezing point (pour point) ) is low, and some environmentally friendly insulating oils have low flash points even though they have low pour points

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] This example provides a natural ester insulating liquid, the specific formula of which is shown in Table 1. The natural ester insulating liquid is prepared by the following steps:

[0088] In terms of mass percentage, heat 98.1% soybean oil to 50-60°C, add 0.1% tocopherol, 0.3% sterol, 0.6% antioxidant T501, 0.2% citric acid, 0.2% pour point depressant Mix and stir with 0.5% auxiliary agent for 20-30min, cool to room temperature, wherein, the tocopherol is composed of 10% α-tocopherol, 3% β-tocopherol, 72% γ-tocopherol and 25% δ-tocopherol, The sterols consisted of 5% campesterol, 25% stigmasterol and 70% β-sitosterol to prepare natural ester insulating oil.

[0089] Table 1

[0090]

Embodiment 2

[0092] This embodiment provides a natural ester insulating liquid, the specific formula of which is as described in Table 2. The natural ester insulating liquid is prepared by the following steps:

[0093]In mass percentage, heat 97.9% soybean oil to 50-60°C, add 0.2% tocopherol, 0.4% sterol, 0.5% antioxidant T501, 0.1% citric acid, 0.1% pour point depressant Mix and stir with 0.8% auxiliary agent for 20-30min, cool to room temperature, wherein, the tocopherol is composed of 13% α-tocopherol, 5% β-tocopherol, 64% γ-tocopherol and 18% δ-tocopherol, The sterols consisted of 4% campesterol, 28% stigmasterol and 68% β-sitosterol to prepare a natural ester insulating oil.

[0094] Table 2

[0095]

Embodiment 3

[0097] This embodiment provides a natural ester insulating liquid, the specific formula of which is shown in Table 2. The natural ester insulating liquid is prepared by the following steps:

[0098] In terms of mass percentage, heat 98.3% soybean oil to 50-60°C, add 0.15% tocopherol, 0.35% sterol, 0.3% antioxidant T501, 0.2% citric acid, and 0.3% pour point depressant Mix and stir with 0.4% auxiliary agent for 20-30min, cool to room temperature, wherein, the tocopherol is composed of 8% α-tocopherol, 4% β-tocopherol, 75% γ-tocopherol and 13% δ-tocopherol, The sterols consisted of 2% campesterol, 25% stigmasterol and 73% β-sitosterol to prepare natural ester insulating oil.

[0099] table 3

[0100]

[0101]

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Abstract

The invention belongs to the technical field of insulating materials. The invention especially relates to a natural ester insulating liquid. The natural ester insulating liquid is prepared from the following raw materials in percentage by mass: 96.0%-99.0% of soybean oil, 0.4%-2.5% of an antioxidant, 0.1%-0.5% of a pour point depressant and 0.1%-1.0% of an auxiliary agent, the antioxidant is prepared from tocopherol, sterol, an antioxidant T501 and citric acid; d nathe mass ratio of the tocopherol to the sterol to the antioxidant T501 to the citric acid is (0.1 to 0.5) to (0.1 to 0.5) to (0.1 to 1.0) to (0.1 to 0.5). The insulating liquid has good electrical insulation performance, and also has the advantages of high ignition point, high flash point, low pour point, no toxicity, harmlessness, good biodegradability and oxidation stability.

Description

technical field [0001] The invention belongs to the technical field of insulating materials. In particular, it relates to a natural ester insulating liquid. Background technique [0002] Insulating oil plays an important role in the operation of power equipment. It is compared to the blood in power generation and power supply equipment. It is mainly used for oil-immersed insulation of high-voltage equipment, such as oil-immersed transformers, circuit breakers, and transformers. And filling to eliminate the insulating air gap in the equipment, it plays the role of insulation, heat dissipation and cooling, and arc extinguishing. [0003] Traditional electrical equipment insulating oils use mineral oils, as well as synthetic compound insulating oils such as biphenyl, siloxane, and phthalates. Mineral oil has good oxidation resistance, good dielectric strength and heat dissipation ability, so it has been widely used in power systems. However, mineral oil has a low ignition po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N40/16C10N30/10
CPCC10M169/044C10N2040/16C10N2030/10C10M2207/044C10M2207/046C10M2207/021C10M2207/144C10M2207/022C10M2227/09C10M2205/028C10M2209/084C10N2030/64C10N2030/08C10M2207/026C10M2207/401
Inventor 莫文雄王勇黄青丹宋浩永王炜陈于晴黄慧红赵崇智刘静李助亚吴培伟魏晓东
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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