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Insulating oil and preparation method thereof

A technology of insulating oil and oil samples, which is applied in the petroleum industry, base materials, lubricating compositions, etc., can solve problems such as threats to human health, environmental pollution of waste oil, etc., and achieve lower viscosity and pour point, and lower cold-state operation temperature , the effect of huge economic benefits

Active Publication Date: 2022-03-01
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

At present, there is no reasonable technology to utilize waste oil, making waste oil an environmental pollutant and a serious threat to people's health

Method used

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  • Insulating oil and preparation method thereof
  • Insulating oil and preparation method thereof
  • Insulating oil and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0037] In order to solve the above problems, an embodiment of the present invention provides a method for preparing insulating oil, which includes the following steps S10-S40.

[0038] Step S10: after the waste oil and sulfuric acid are subjected to the first modification treatment in the organic alcohol solvent, the water and the organic alcohol solvent are removed to obtain the first modified waste oil. The condition of the first modification treatment is at 75-95°C React at high temperature for 4-6 hours.

[0039] In this way, by step S10, the waste oil is modified in sulfuric acid under the above-mentioned specific conditions, the aliphatic chain of the waste oil can be cut off, and then the length and content of the large functional group aliphatic chain in the waste oil are reduced, and the waste oil containing more Modified waste oil with multiple short chains.

[0040] In some of the embodiments, in the first modification treatment, the mass concentration of sulfuric ...

Embodiment 1

[0072] A kind of waste oil is the method for making insulating oil as raw material, and concrete steps are as follows:

[0073] 1) The waste oil is removed from impurities, and the waste oil is filtered by a physical filtration method to obtain clean waste oil.

[0074] 2) the waste oil that described step 1) obtains carries out modified treatment, and concrete technological process is:

[0075] 1. Add ethanol to the waste oil, and add 65wt% sulfuric acid according to the ratio of 1% by volume of the waste oil, react at a temperature of 75 to 95° C. for 4 to 6 hours, and distill under reduced pressure after the reaction to remove water and ethanol.

[0076] 2. Add 30wt% hydrochloric acid to the product obtained in step 1. according to the ratio of 1% oil volume, and react at 85° C. for 5 hours. After the reaction, the water is distilled under reduced pressure to obtain modified waste oil.

[0077] 3) The modified waste oil obtained in the step 2) is transferred to an open rea...

Embodiment 2

[0086] The preparation process of embodiment 2 is basically the same as embodiment 1, and the difference is only: the consumption of the sulfuric acid in step 1. of step 2) in this embodiment is to add 70wt% sulfuric acid according to the ratio of waste oil volume 0.5%;

[0087] The consumption of hydrochloric acid in step 2. is to add 35wt% hydrochloric acid according to the ratio of oil volume 0.5%;

[0088] Step 4) adding 70wt% phosphoric acid solution of 4% volume of the washed oil sample;

[0089] Step 6) add the lye of 8 times of theoretical alkali amount of the acidic substance in neutralizing the oil;

[0090] Step 10) Add 0.03% antioxidant (dibutylhydroxytoluene) by oil weight.

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Abstract

The invention relates to insulating oil and a preparation method thereof, and the preparation method comprises the following steps: after illegal cooking oil and sulfuric acid are subjected to first modification treatment in an organic alcohol solvent, water and the organic alcohol solvent are removed, first modified illegal cooking oil is prepared, and the condition of the first modification treatment is that reaction is performed for 4-6 hours at the temperature of 75-95 DEG C; after the first modified illegal cooking oil and hydrochloric acid are subjected to second modification treatment, water is removed, second modified illegal cooking oil is prepared, and the condition of the second modification treatment is that reaction is carried out for 4-6 h at the temperature of 80-90 DEG C; mixing the second modified illegal cooking oil with water at 60-80 DEG C, carrying out first water washing, and standing for layering to obtain a first water-washed oil sample; and sequentially carrying out degumming treatment, decoloring treatment and alkali refining treatment on the first water-washed oil sample, and then mixing with an antioxidant. According to the preparation method, the swill-cooked dirty oil is taken as a raw material, the length and the content of aliphatic chains of large functional groups in the prepared insulating oil are reduced, and the prepared insulating oil has relatively low viscosity and pour point.

Description

technical field [0001] The invention relates to the field of electrical technology, in particular to an insulating oil and a preparation method thereof. Background technique [0002] Insulating oil is a synthetic liquid insulating material, referred to as synthetic oil. Since mineral insulating oil is a mixture of various hydrocarbons, it is difficult to remove the components that reduce the insulation performance, and the preparation process is complex, easy to burn, low in heat resistance, and low in dielectric constant. Therefore, people have researched and developed many A synthetic oil with excellent properties. The pour point of insulating oil determines the minimum cold operating temperature of the transformer; at present, the pour point of insulating oil is high, and the corresponding minimum cold operating temperature is also high, which will limit its use in cold regions. How to reduce the pour point of insulating oil has become the focus of attention. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M101/04C10M169/04C10M177/00C10N40/16
CPCC10M101/04C10M169/04C10M177/00C10M2207/401C10M2207/046C10M2207/023C10N2030/02C10N2040/16Y02W30/74
Inventor 黄慧红莫文雄宋浩永王勇黄青丹陈于晴王炜赵崇智刘静李助亚
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD