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Transformer oil gassing-resistant additive and preparation method thereof

A transformer oil, anti-gassing technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of difficult operation, high pour point, low yield of target products, etc., and achieve single-ring and double-ring aromatics High content, low acid value and polycyclic aromatic hydrocarbon content, excellent anti-gassing performance

Active Publication Date: 2015-08-26
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN103113963A uses dodecylbenzene as an anti-gassing additive to produce ultra-high voltage transformer oil. Dodecylbenzene is expensive and has a high pour point
CN102676215A uses transformer oil solvent refining to extract oil or its mixed oil with naphthenic transformer oil fractions as raw material, and produces anti-gassing additive through solvent refining-liquid phase denitrification and clay refining process, which has a low yield of target products , Difficult operation, too much white clay and denitrification agent

Method used

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  • Transformer oil gassing-resistant additive and preparation method thereof
  • Transformer oil gassing-resistant additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1, preparation of transformer oil anti-gassing additive

[0026] Using the extracted oil refined from transformer oil furfural produced by the industrial plant of China National Oil and Gas Development and Utilization Company as raw material (see Table 1 for detailed properties), liquid-phase denitrification was carried out in a three-necked glass bottle, and 0.8% of commercially available WSQ-2 denitrification agent was added ( mass percentage, the same below), vigorously stirred, maintained at a temperature of 85° C. for 30 minutes, allowed to stand for separation, and removed residues. The oil phase was continued to be purified by adsorption in a three-neck glass bottle, 5% alkaline clay was added, stirred vigorously, maintained at a temperature of 85°C for 40 minutes, separated by filtration, and the residue was removed to obtain a denitrified refined oil. Using denitrified refined oil as the raw material, the hydrogenation test was carried out in the hydrog...

Embodiment 2

[0034] Embodiment 2, preparation of transformer oil anti-gassing additive

[0035] Example 2 has the same process flow as Example 1, and the raw oil, hydrogenation test device, hydrotreating catalyst, hydrogenation supplementary refining catalyst, denitrification agent, and adsorbent are also the same, and the specific operating parameters are different from Example 1 (details See Table 2).

[0036] It can be seen from the data in Table 2 that the total content of monocyclic and bicyclic aromatic hydrocarbons in transformer oil anti-gassing additives is 54.7% (C A Value is 22.9%), gas evolution is less than -40uL / min, sulfur content is 120ug / g, nitrogen content is less than 2ug / g, pour point reaches -54°C, PCA is less than 1%, excellent oxidation stability.

Embodiment 3

[0040] Example 3, preparation of transformer oil anti-gassing additive

[0041] Example 3 has the same processing flow as Example 1, and the raw oil, hydrogenation test device, hydrotreating catalyst, hydrogenation supplementary refining catalyst, denitrification agent, and adsorbent are also the same, and the specific operating parameters are different from Example 1 (details See Table 2).

[0042] It can be seen from the data in Table 2 that the total content of monocyclic and bicyclic aromatic hydrocarbons in the anti-gassing additive of transformer oil is 54.1%, the gassing property is less than -40uL / min, the sulfur content is 126ug / g, the nitrogen content is less than 2ug / g, and the pour point reaches -54℃, PCA content is less than 1%, excellent oxidation stability.

[0043] Table 1 Raw Oil Properties

[0044] Analysis Project

Raw oil

Analytical method

Viscosity (40℃), mm 2 / s

14.5

GB / T265

Pour point, °C

-50

GB / T 3535 ...

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Abstract

The invention provides a transformer oil gassing-resistant additive and a preparation method thereof. The preparation method comprises steps as follows: extract oil refined by a naphthenic base transformer oil fraction solvent is taken as a raw material and is sequentially subjected to liquid phase denitrification processing and adsorption refining to obtain denitrified and refined oil; the denitrified and refined oil is subjected to hydroprocessing-hydrofinishing processing to obtain hydrofinished oil, the hydrofinished oil is redistilled, and distillate at the temperature higher than 280 DEG C is collected to obtain the transformer oil gassing-resistant additive. According to the method, the extract oil refined by the naphthenic base transformer oil fraction solvent with low additional value is taken as the raw material to prepare the transformer oil gassing-resistant additive with high additional value, and the transformer oil gassing-resistant additive has the characteristics of high content of monocyclic and dicyclic aromatic hydrocarbon, excellent gassing resistance, extremely low content of sulfur, nitrogen and polycyclic aromatic hydrocarbon, extremely low acid value and excellent oxidation stability and can be used in a blending component of high-grade transformer oil.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to a transformer oil anti-gassing additive and a preparation method thereof. Background technique [0002] Transformer oil is the most important variety of electrical insulation oil. With the development of economy, China has become the world's largest producer of transformers, accounting for about half of the world's total output. At the same time, due to the national conditions of power transmission from west to east, a number of power transmission and transformation lines with the highest voltage level in the world have been built in China and will be further developed. Transformer oil has become a lubricating oil product with rapid growth in output, continuous improvement in quality, and continuous emergence of new varieties in China. [0003] Under the action of a high-voltage electric field in transformer oil, the straight-chain alkanes in the oil will relea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/14
Inventor 杨文中蔡烈奎马莉莉张海洪秦一鸣
Owner CHINA NAT OFFSHORE OIL CORP
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