Production method for high-grade naphthenic transformer oil

A technology of transformer oil and production method, which is applied in the direction of base material, petroleum industry, lubricating composition, etc., can solve the problems of poor anti-gassing performance, poor solubility performance, low content of aromatics, etc., and achieve good solubility performance, electrical performance and Good anti-gassing performance and excellent anti-oxidation performance

Inactive Publication Date: 2015-06-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Transformer oil produced by "high-pressure hydrogenation combined process" has high refining depth, low aromatic content and high aniline point. Although it has good anti-oxidation performance after adding antioxidants, it can meet GB2536-2011 and IEC60296-2012 standards I-30°C transformer oil (special) anti-oxidation stability index requirements, but the gassing performance is +50-60μL / min, 30-40μL / min higher than the traditional solvent refining process, the anti-gassing performance is poor, aniline The point is 5-8℃ higher than the traditional solvent refining process, and the solubility is poor, which affects the long-term safe operation of electrical equipment

Method used

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  • Production method for high-grade naphthenic transformer oil
  • Production method for high-grade naphthenic transformer oil
  • Production method for high-grade naphthenic transformer oil

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Using the atmospheric and vacuum distillate of naphthenic crude oil as raw material, the base oil A obtained by adopting the combined process of "high pressure hydrotreating-high pressure hydrogen decondensation-high pressure hydrogenation supplementary refining-distillation"; using naphthenic crude oil propane deasphalting Oil is used as raw material, and the combined process of "high-pressure hydrocracking-high-pressure hydroisomerization-high-pressure hydrogenation supplementary refining-distillation" is used to obtain base oil C; base oil A and base oil C are blended at a ratio of 20:80, and then added 0.35% 2,6-di-tert-butyl-p-cresol (DBPC) antioxidant is blended to obtain high-grade transformer oil.

[0020] The transformer oil complies with the I-30°C transformer oil (special) index requirements in the GB2536-2011 and IEC60296-2012 standards, with a gas evolution of +34μL / min, aniline point of 83.8°C, and carbon type analysis of C P The value is less than 50%, wh...

Embodiment 2

[0022] Using the atmospheric and vacuum distillate of naphthenic crude oil as raw material, the base oil B obtained by adopting the combined process of "high pressure hydrotreating-high pressure hydrodecondensation-high pressure hydrogenation supplementary refining-distillation"; using the vacuum distillate of paraffinic crude oil as Raw materials, using the combined process of "high-pressure hydrocracking-high-pressure hydroisomerization-high-pressure hydrogenation supplementary refining-distillation" to obtain base oil D; base oil B and base oil D are blended at a ratio of 50:50, and then 0.35% The 2,6-di-tert-butyl-p-cresol (DBPC) antioxidant is blended to obtain high-grade transformer oil.

[0023] The transformer oil complies with the I-30°C transformer oil (special) index requirements in the GB2536-2011 and IEC60296-2012 standards, the gas evolution is +29μL / min, the aniline point is 82.9°C, and the carbon type analysis is C P The value is less than 50%, which has good s...

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Abstract

The invention relates to a production method for high-grade naphthenic transformer oil. The production method comprises the following steps: preparing base oil 1 from naphthenic crude atmospheric and vacuum fraction by using combined process of high pressure hydrotreatment-high pressure hydrodewaxing-high pressure hydrofinishing-distillation; preparing base oil 2 from naphthenic crude or paraffinic crude fraction by using combined process of high pressure hydrotreatment or cracking-high pressure hydroisomerization-high pressure hydrofinishing-distillation; and blending the base oil 1 with the base oil 2 in proportion, adding 0.3 to 0.40% of 2,6-di-t-butyl p-cresol (DBPC) anti-oxidant and carrying out blending. The high-grade naphthenic transformer oil meets requirements on I -30 DEG C transformer oil (special) prescribed in the standards GB2536-2011 and IEC60296-2012; and the produced transformer oil has the gassing property of + 35 mu L/min, an aniline point of no more than 84 DEG C, a CP value in carbon type analysis of less than 50%, good electrical performance and anti-gassing performance, excellent antioxidation performance and good dissolving performance.

Description

technical field [0001] The invention relates to a production method of high-grade naphthenic transformer oil, which belongs to hydrogenation lubricating oil. Background technique [0002] Transformer oil mainly plays the role of insulation and cooling in electrical equipment such as transformers and reactors. In order to ensure the long-term safe operation of electrical equipment, transformer oil must have excellent low-temperature performance to meet the low-temperature start-up requirements of electrical equipment; low kinematic viscosity and viscosity index are conducive to heat dissipation and cooling of electrical equipment; excellent electrical performance; meet the requirements of electrical equipment Insulation requirements; good anti-gassing performance, absorbing hydrogen generated by partial discharge to prevent air gap discharge from destroying the insulation of electrical equipment; good oxidation stability, slowing down the oxidation of oil as much as possible,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M109/02C10N40/16C10N30/10
Inventor 马书杰张绮王会娟于会民郭春梅王鹏张培恒
Owner PETROCHINA CO LTD
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