Method for reducing acid value of novel plant insulating oil

A plant insulating oil and a new type of plant technology, applied in the treatment field of acid value reduction in recycling, can solve the problems of increasing post-processing difficulty, increasing cost, accelerating hydrolysis, etc., achieving low production cost, saving production cost, and short reaction time Effect

Inactive Publication Date: 2018-11-30
STATE GRID HUBEI ELECTRIC POWER CO XIAOGAN POWER SUPPLY CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the reaction process, since water can participate in the reaction, the vegetable insulating oil is further hydrolyzed, which accelerates hydrolysis, consumes raw materials, and increases the difficulty of post-processing
The waste liquid after alkali refining needs further post-processing, which increases the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 4 g of 100-200 mesh basic alumina, add it to 100 g of vegetable insulating oil, and stir evenly. React at 50°C for 2 hours. Cool to room temperature, filter under reduced pressure, and the filtrate is the product. Using the GB7599-87 standard method, the acid value of the product after the reaction is 0.013 mg / g KOH, and the acid value before the reaction is 0.160 mg / g KOH. Breakdown voltage: before reaction: 25.5KV; after reaction: 22.0KV. The product recovery rate is 95.34%.

Embodiment 2

[0022] Weigh 2 g of 100-200 mesh basic alumina, add it to 100 g of vegetable insulating oil, and stir evenly. React at 60°C for 2 hours. Cool to room temperature, filter under reduced pressure, and the filtrate is the product. Using the GB7599-87 standard method, the acid value of the product after the reaction is 0.022 mg / g KOH, and the acid value before the reaction is 0.160 mg / g KOH. Breakdown voltage: before reaction: 25.5KV; after reaction: 26.0KV. The product recovery rate is 96.79%.

Embodiment 3

[0024] Weigh 2 g of 100-200 mesh basic alumina, add it to 100 g of vegetable insulating oil, and stir evenly. React at 40°C for 2 hours. Cool to room temperature, filter under reduced pressure, and the filtrate is the product. Using the GB7599-87 method, the acid value of the product after the reaction is 0.036 mg / g KOH, and the acid value before the reaction is 0.160 mg / g KOH. Breakdown voltage: before reaction: 25.5KV; after reaction: 29.3KV. The product recovery rate is 97.44%.

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PUM

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Abstract

The invention relates to a method for reducing an acid value in plant insulating oil refining and plant insulating oil waste oil recycling process. An adsorbent used in the method is alkaline alumina,and the mass percentage of the adsorbent added to the plant insulating oil is 2% to 4%. The method for reducing the acid value of the invention has the advantages of simple production process, low production cost, high efficiency and low environmental pollution, can save production cost for enterprises, and saves energy for the country.

Description

technical field [0001] The invention relates to a novel method for reducing the acid value of vegetable insulating oil, which is mainly used in the refining of vegetable insulating oil and the treatment of reducing the acid value in the recovery and utilization of vegetable insulating oil. Background technique [0002] Compared with mineral insulating oil as transformer oil, vegetable insulating oil has a wide range of sources and is a renewable resource. After use, the waste oil can be degraded by itself and has no pollution to the environment. Mineral oil is derived from petroleum, and waste oil pollutes the environment. At present, countries are trying to replace traditional mineral insulating oil with renewable vegetable oil as raw material. The main component of vegetable insulating oil is unsaturated fatty acid methyl ester, which is more hydrophilic than mineral insulating oil whose main component is saturated fatty acid ester. It is easier to adopt the traditional a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/10
CPCC11B3/10
Inventor 任乔林付伯桥张涛肖洒覃彩芹付梅芳周晗鲁伟梅阳肖亚平李芳亚任贝婷胡雯胡恒宇
Owner STATE GRID HUBEI ELECTRIC POWER CO XIAOGAN POWER SUPPLY CO
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