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Transformer oil antigassing 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 target product yield, etc., and achieve monocyclic and bicyclic aromatic hydrocarbons. The effect of high content, low acid value and polycyclic aromatic hydrocarbon content, and excellent anti-gassing performance

Active Publication Date: 2015-09-16
CHINA NAT OFFSHORE OIL CORP +3
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  • Description
  • Claims
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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 antigassing additive and preparation method thereof
  • Transformer oil antigassing additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, preparation of transformer oil anti-gassing additive

[0027] Using the extract oil refined from transformer oil furfural produced by the industrial plant of China Shipping Asphalt Co., Ltd. as raw material (see Table 1 for detailed properties), the hydrogenation test was carried out in the hydrogenation pilot plant (produced by Beijing Tuochuan Petrochemical Evaluation Equipment Technology Development Co., Ltd., Two reactors are connected in series, the maximum catalyst loading capacity of a single reactor is 200ml, and the new hydrogen is passed once), the first reactor is filled with a hydrogenation treatment catalyst (CH-15), and the second reactor is filled with a hydrogenation make-up Refined catalyst (HJ-14), see Table 2 for detailed operating parameters. Distill the hydrotreated oil, use the distillate above 280°C as the raw material for denitrification, add 0.05% (mass percentage, the same below) of commercially available WSQ-2 denitrification age...

Embodiment 2

[0035] Embodiment 2, preparation of transformer oil anti-gassing additive

[0036] Embodiment 2 is exactly the same as embodiment 1 processing flow, feedstock oil, hydrogenation test device, hydrotreating catalyst, hydrogenation supplementary refining catalyst, denitrification agent are also identical, and adsorbent is light magnesia and alkaline clay (mass Ratio 6:4), specific operating parameters are different from Example 1 (see Table 2 for details).

[0037] It can be seen from the data in Table 2 that the yield of the transformer oil anti-gassing additive relative to the raw material oil is 92.7%, and the content of monocyclic and bicyclic aromatic hydrocarbons in the transformer oil anti-gassing additive is 60.1% (C A Value is 25.2%), gas evolution is less than -40uL / min, sulfur content is 204ug / g, nitrogen content is less than 2ug / g, pour point reaches -48°C, PCA is 1.2%, excellent oxidation stability.

Embodiment 3

[0041] Embodiment 3, preparation of transformer oil anti-gassing additive

[0042] Embodiment 3 is exactly the same as embodiment 1 processing flow, feedstock oil, hydrogenation test device, hydrotreating catalyst, hydrogenation supplementary refining catalyst, denitrification agent are also identical, and adsorbent is light magnesia and alkaline clay (mass Ratio 4:6), specific operating parameters are different from Example 1 (see Table 2 for details).

[0043] It can be seen from the data in Table 2 that the yield of the transformer oil anti-gassing additive relative to the raw material oil is 93.6%, and the content of monocyclic and bicyclic aromatic hydrocarbons in the transformer oil anti-gassing additive is 63.5% (C A Value is 26.7%), gas evolution is less than -40uL / min, sulfur content is 290ug / g, nitrogen content is less than 2ug / g, pour point reaches -48°C, PCA is 1.5%, excellent oxidation stability.

[0044] Table 1 Properties of raw oil

[0045] Analysis ...

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Abstract

The invention provides a transformer oil antigassing additive and a preparation method thereof. According to the invention, extract oil obtained by solvent refining of a cycloalkyl transformer oil fraction is adopted as a raw material, and is subjected to hydrotreating-hydrofinishing, such that hydrofinished oil is obtained; the oil is distilled; a fraction at the temperature higher than 280 DEG C is collected; and the fraction is subjected to liquid-phase denitrification treatment and then the fraction obtained after liquid-phase denitrification treatment is subjected to adsorption refining, such that the additive is obtained. With the method, the transformer oil antigassing additive with a high added value is obtained. The additive has the characteristics of high monocyclic and bicyclic aromatic hydrocarbon content, excellent antigassing performance, low sulfur content, low nitrogen content, low acid value, low polycyclic aromatic hydrocarbon content, and excellent oxidation stability. The additive 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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IPC IPC(8): C10G67/14
Inventor 杨文中马莉莉蔡烈奎张海洪秦一鸣
Owner CHINA NAT OFFSHORE OIL CORP
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