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Preparation method of base oil of transformer oil

A technology for transformer oil and transformers, which is applied in the field of preparing transformer oil base oil by utilizing a heavy hydrocarbon oil thermal cracking process, can solve the problems of poor oxidation stability of polycyclic aromatic hydrocarbons, easy oxidative discoloration, and formation of precipitation, and achieves widening the source of raw materials. , good viscosity-temperature performance, solve the effect of a single source

Active Publication Date: 2012-06-06
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Linear alkanes in oil products have poor low-temperature fluidity and are prone to hydrogen evolution. They are non-ideal components in transformer oils. Aromatic hydrocarbons have good gas evolution resistance, but polycyclic aromatic hydrocarbons have poor oxidation stability and are prone to oxidative discoloration and precipitation. The content is removed or reduced during processing, so the production process needs to be selected according to the properties of different transformer oil base raw materials

Method used

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  • Preparation method of base oil of transformer oil
  • Preparation method of base oil of transformer oil
  • Preparation method of base oil of transformer oil

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Effect test

Embodiment 1

[0019] The naphthenic residual oil is used as the raw material, and the properties of the raw material are shown in Table 1. The thermal cracking process is carried out, and the operating conditions of the thermal cracking process are shown in Table 2. The raw material of transformer oil base oil is obtained by fractional cutting, and the raw material is processed by hydrogenation, furfural, decondensation and clay production process to obtain transformer base oil. The operating parameters of each production process are shown in Table 3, Table 4, Table 5, and Table 6. The viscosity-temperature performance of the base oil is shown in Table 6, and the properties of the hydrogenation catalyst are shown in Table 7. The base oil complies with IEC60296(2003), ASTM D3487, GB 2536-90 and SH0040-91 standards.

Embodiment 2

[0021]Using naphthenic-based reduced residual oil as raw material, the properties of the raw material are shown in Table 1, and the thermal cracking process is carried out, and the operating conditions of the thermal cracking process are shown in Table 2. The raw material of transformer oil base oil is obtained by fractional cutting, and the raw material is processed by hydrogenation, furfural, decondensation and clay production process to obtain transformer base oil. The operating parameters of each production process are shown in Table 3, Table 4, Table 5, and Table 6. The viscosity-temperature properties of the base oil are shown in Table 6, and the property analysis of the hydrogenation catalyst is shown in Table 7. The base oil complies with IEC60296(2003), ASTM D3487, GB 2536-90 and SH0040-91 standards.

Embodiment 3

[0023] Inferior heavy oil A is used as raw material, and the properties of the raw material are shown in Table 1, and a thermal cracking process is carried out, and the operating conditions of the thermal cracking process are shown in Table 2. The raw material of transformer oil base oil is obtained by fractional cutting, and the raw material is processed by hydrogenation, furfural, decondensation and clay production process to obtain transformer base oil. The operating parameters of each production process are shown in Table 3, Table 4, Table 5, and Table 6. The viscosity-temperature properties of the base oil are shown in Table 6, and the property analysis of the hydrogenation catalyst is shown in Table 7. The base oil complies with IEC60296(2003), ASTM D3487, GB 2536-90 and SH0040-91 standards.

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Abstract

The invention relates to a preparation method of base oil of transformer oil. The preparation method utilizes inferior heavy oil and naphthenic atmospheric / reduced pressure residuum and / or paraffin-based atmospheric / reduced pressure residuum as raw materials and comprises the following steps of heating the raw materials, feeding the heated raw materials into a reactor, carrying out cooling and fractionation of the reaction products to obtain a fraction of 260 to 360, carrying out hydrofinishing of the fraction of 260 to 360 to remove S atoms, N atoms and O atoms, carrying out an olefin saturating process and an aromatic hydrocarbon hydrogenation process, carrying out solvent-based refining of the hydrofinished oil obtained by the previous step to remove polycyclic short-side chain aromatic hydrocarbons, compounds containing S, O and N, and colloid asphalt so that refined oil is obtained, carrying out hydrogenation sedimentation of the refined oil to remove a high-pour point component, and carrying out white clay-based refining of the hydrogenation sedimentation product oil obtained by the previous step to obtain white clay refined oil, wherein the white clay refined oil is the base oil of transformer oil. The preparation method provided by the invention widens raw material sources of base oil of transformer oil. Through the preparation method, the base oil of transformer oil has good viscosity-temperature characteristics and accords with standards of the IEC60296 (2003) standard, the ASTM D3487 standard, the GB 2536-90 standard and the SH0040-91 standard.

Description

technical field [0001] The invention relates to a preparation method of transformer oil base oil, in particular to a preparation method of producing transformer oil base oil by using a heavy hydrocarbon oil thermal cracking process. Background technique [0002] Transformer oil is a necessary medium for the transformer to work. It mainly plays the role of insulation and heat dissipation. Its quality is directly related to the safe operation of the transformer. Since Professor Elihu Thomson first obtained the patent for paraffin mineral transformer oil used in transformers in 1887, with the upgrading of transformers, the performance requirements of mineral transformer oil have become more and more stringent, and there has been a trend of replacing paraffin base oil with naphthenic transformer oil . Naphthenic transformer oil has the characteristics of low pour point, excellent solubility, good thermal stability, and good gas evolution, and its performance largely depends on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G69/06H01B3/22
Inventor 汪军平田凌燕熊春珠甄新平熊良铨王华蔡烈奎
Owner PETROCHINA CO LTD
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