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Method for measuring insulation oleic acid value of plant

A technology of vegetable insulating oil and acid value, which is applied in chemical analysis by titration, material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc., can solve the problem of low volume resistivity, low volume resistivity, Vegetable insulating oil has problems such as high dielectric loss factor and weak dielectric properties, and achieves the effects of high acid value accuracy, excellent dielectric properties, and simple method.

Inactive Publication Date: 2016-12-14
CHINA ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the dielectric loss factor of vegetable insulating oil is higher, the volume resistivity is lower, and the dielectric property is relatively weaker than that of mineral insulating oil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A) Weighing 8.327g of vegetable insulating oil with an electronic balance and injecting it into the Erlenmeyer flask 1;

[0017] B) Measure 95% ethanol with a graduated cylinder and put it into Erlenmeyer flask 2, place it under the reflux condenser, boil in a water bath at 85°C for 5 minutes, add 0.5mL alkali blue 6B solution to Erlenmeyer flask 2, and quickly use 0.05mol / L potassium hydroxide ethanol solution to neutralize until the solution changes from blue to light red, and the pH meter reads 7;

[0018] C) inject the solution obtained in step B) into the Erlenmeyer flask 1 equipped with the oil sample to be tested, then place the Erlenmeyer flask 1 under the reflux condenser, and boil in a water bath at 85° C. for 5 minutes;

[0019] D) The mixed solution of step C) is quickly titrated with 0.05mol / L potassium hydroxide ethanol solution until the solution changes from blue to light red, and the pH meter reads 7, and records the required volume of potassium hydrox...

Embodiment 2

[0023] Weigh 9.957 g of plant insulating oil with an electronic balance and inject it into the Erlenmeyer flask 1;

[0024] B) Measure 95% ethanol with a graduated cylinder and put it into conical flask 2, place it under the reflux condenser, boil in a water bath at 85°C for 5 minutes, add 0.5mL alkali blue 6B solution to conical flask 2, and use 0.05 mol / L potassium hydroxide ethanol solution, until the solution changes from blue to light red, and the pH meter reads 7;

[0025] C) inject the solution obtained in step B) into the Erlenmeyer flask 1 equipped with the oil sample to be tested, then place the Erlenmeyer flask 1 under the reflux condenser, and boil in a water bath at 85° C. for 5 minutes;

[0026] D) Titrate the mixed solution of step C) with 0.05mol / L potassium hydroxide ethanol solution while it is hot until the solution changes from blue to light red, and the pH meter reads 7, and records the required potassium hydroxide ethanol solution The volume is 160 μL. ...

Embodiment 3

[0030] Weigh 11.128 g of plant insulating oil with an electronic balance and inject it into the Erlenmeyer flask 1;

[0031] B) Measure 95% ethanol with a graduated cylinder and put it into conical flask 2, place it under the reflux condenser, boil in a water bath at 85°C for 5 minutes, add 0.5mL alkali blue 6B solution to conical flask 2, and use 0.05 mol / L potassium hydroxide ethanol solution, until the solution changes from blue to light red, and the pH meter reads 7;

[0032] C) inject the solution obtained in step B) into the Erlenmeyer flask 1 equipped with the oil sample to be tested, then place the Erlenmeyer flask 1 under the reflux condenser, and boil in a water bath at 85° C. for 5 minutes;

[0033] D) Titrate the mixed solution of step C) with 0.05mol / L potassium hydroxide ethanol solution while it is hot until the solution changes from blue to light red, and the pH meter reads 7, and records the required potassium hydroxide ethanol solution The volume is 147 μL. ...

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Abstract

The invention discloses a method for measuring the insulation oleic acid value of a plant. The mass range of an oil sample to be tested is reduced to be 8-12 g; the titration end point is strictly controlled by observing the color of the oil sample and using a pH meter in the test process. The method is directly used for testing the insulation oleic acid value of the plant and the accuracy is 0.01 mgKOH / g; the method has simple steps and does not need the step of dividing different sampling masses according to the acid value range.

Description

technical field [0001] The invention belongs to the field of vegetable insulating oil, and in particular relates to a method for measuring the acid value of vegetable insulating oil. Background technique [0002] Insulating oil is the liquid insulating medium of traditional Chinese medicine, which is widely used in electrical equipment such as transformers. Vegetable insulating oil is a new type of environmentally friendly liquid insulating medium. It has a high ignition point, good insulation performance and a very high natural degradation rate. It is an excellent green substitute for traditional mineral insulating oil. The electrical performance and life characteristics of vegetable insulating oil are directly related to the stable operation of vegetable insulating oil transformers. Insulation breakdown caused by the deterioration of the insulation medium inside the transformer is often the main cause of transformer failure. Vegetable insulating oil has good dielectric p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16G01N21/78
CPCG01N31/16G01N21/78
Inventor 陈江波何妍蔡胜伟陈程李剑王飞鹏吴俐亚文刚刘芮彤杨滢璇范维
Owner CHINA ELECTRIC POWER RES INST
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