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Transformer oil base oil and preparation method and applications thereof

A technology for transformer oil and base oil, which is applied in the base material, petroleum industry, and multi-stage series-connected refining process treatment, etc. Mild, excellent electrical performance

Active Publication Date: 2012-03-21
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At first, naphthenic crude oil was used as raw material, and the sulfuric acid-clay refining process was used to produce transformer oil base oil. However, this method has high cost, low yield, small processing capacity, and the most important thing is that a large amount of acid residue is produced to pollute the environment.

Method used

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  • Transformer oil base oil and preparation method and applications thereof
  • Transformer oil base oil and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1. Preparation and performance detection of transformer oil base oil

[0041] The test was repeated three times, and the average value of the three product A was taken as the performance test result.

[0042] 1. Preparation of transformer oil base oil

[0043] 1. Purification of furfural

[0044] The above-mentioned QHD32-6 normal second-line distillate oil is purified by furfural, the mass ratio of furfural and QHD32-6 normal second-line distillate oil is 1.5:1, the temperature at the top of the tower is 70°C, and the temperature at the bottom of the tower is 40°C to obtain refined oil.

[0045] The furfural solvent in the refined oil is removed by vacuum distillation, and the conditions of vacuum distillation are: 2 kpa, 130° C., to obtain the dealdehyded refined oil.

[0046] 2. Refinement of white clay

[0047] Take the refined oil and then add 12% (mass percent) of clay to refine the clay for 30 min at 160°C under nitrogen protection, filter out the clay...

Embodiment 2

[0050] Example 2. Preparation and performance detection of transformer oil base oil

[0051] The test was repeated three times, and the average value of the three products B was taken as the performance test result.

[0052] 1. Preparation of transformer oil base oil

[0053] 1. Purification of furfural

[0054] The above-mentioned QHD32-6 normal second-line distillate oil is purified by furfural, the mass ratio of furfural and QHD32-6 normal second-line distillate oil is 1.8:1, the temperature at the top of the tower is 80°C, and the temperature at the bottom of the tower is 50°C to obtain refined oil.

[0055] The furfural solvent in the refined oil is removed by vacuum distillation, and the conditions of vacuum distillation are: 1 kpa, 125° C., to obtain the dealdehyded refined oil.

[0056] 2. Refinement of white clay

[0057] Add 8% (mass percent) clay to the dealdehyded refined oil, and carry out clay refining at 140° C. under nitrogen protection for 45 minutes.

[0...

Embodiment 3

[0060] Example 3. Preparation and performance detection of transformer oil base oil

[0061] The test was repeated three times, and the average value of the three products C was taken as the performance test result.

[0062] 1. Preparation of transformer oil base oil

[0063] 1. Purification of furfural

[0064] The above-mentioned QHD32-6 normal second-line distillate oil is purified by furfural, the mass ratio of furfural and QHD32-6 normal second-line distillate oil is 3:1, the temperature at the top of the column is 100°C, and the temperature at the bottom of the column is 70°C to obtain refined oil.

[0065]The furfural solvent in the refined oil is removed by vacuum distillation, and the conditions of vacuum distillation are: 0.1 kpa and 120° C. to obtain the dealdehyded refined oil.

[0066] 2. Refinement of white clay

[0067] Add 5% (mass percent) clay to the dealdehyded refined oil, and carry out clay refining at 120° C. under nitrogen protection for 60 min.

[0...

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Abstract

The invention discloses base oil of transformer oil and a preparation method as well as application thereof. The preparation method for the base oil of the transformer oil comprises the following steps: 1) performing furfural refining on QHD32-6 common cut 2 distillate oil to obtain refined oil, and obtaining furfural removed refined oil after removing furfural; and 2) adding clay to the furfuralremoved refined oil for clay refining to obtain the base oil of the transformer oil. The preparation method widens raw material source of the base oil of the domestic transformer oil, and can providebrand-new base oil of high-grade No. 45 transformer oil for the market. In addition, the method has the advantages of simple technological process flow, mild operating conditions, and high yield of target objects; and the base oil of the transformer oil has wide market application space.

Description

technical field [0001] The present invention relates to a transformer oil base oil, its preparation method and its application. Background technique [0002] Transformer oil refers to a class of transformer oil used for insulation, cooling and arc extinguishing in oil-filled electrical equipment such as transformers, reactors, transformers, bushings, and oil switches. There are three requirements for the performance of transformer oil: ① good physical properties; ② good electrical properties; ③ good oxidation stability. [0003] Transformer oil base oil is the raw material for the production of transformer oil. The performance of transformer oil depends to a large extent on the performance of the transformer oil base oil. Generally, paraffin-based transformer oil has a high pour point, is easily oxidized to generate a large amount of acidic compounds, and has a small content of aromatic hydrocarbons. The naphthenic base transformer oil can not only meet the insulation and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/02C10M101/00
Inventor 付玉娥孙元碧袁慧刘维群李军李文赵元欣
Owner CHINA NAT OFFSHORE OIL CORP
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