High-flash-point low-condensation-point transformer oil and preparation method thereof

A technology of transformer oil and low freezing point, applied in the petroleum industry, lubricating composition and other directions, can solve the problems of poor gassing property and low flash point of transformer oil, and achieve the effect of improving insulation capacity, high safety performance and low freezing point

Active Publication Date: 2016-08-17
上海中孚油品集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high flash point low freezing point transformer oil and its preparation method, which will solve the technical problems of low flash point and poor gassing performance of transformer oil in the prior art

Method used

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  • High-flash-point low-condensation-point transformer oil and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] The invention provides a transformer oil with high flash point and low freezing point, which is composed of naphthenic oil with narrow fraction, antioxidant, pour point depressant, light sensitive agent and metal passivator. The weight percent of the narrow fraction naphthenic oil in the transformer oil is 97%. Put the naphthenic oil into the distillation tower and carry out atmospheric and vacuum distillation. The distillate oil at ~350°C is then subjected to hydrofining. During the hydrofinishing process, the reaction pressure of the reactor is 12MPa, the reaction temperature is 320°C, the total space velocity of oil feed is 0.5 / h, and the volume ratio of hydrogen to oil is 850. Relative to the hydrotreating catalyst space velocity of 0.65 / h, relative to the hydrotreating catalyst space velocity of 1.5 / h, the catalyst in the hydrotreating process is Mo-W / Al 2 o 3 , to obtain narrow cut naphthenic oil.

[0032] Take narrow-cut naphthenic oil, antioxidant, pour point ...

Embodiment 2

[0041] The invention provides a transformer oil with high flash point and low freezing point, which is composed of naphthenic oil with narrow fraction, antioxidant, pour point depressant, light sensitive agent and metal passivator. The weight percent of the narrow fraction naphthenic oil in the transformer oil is 98%. Put the naphthenic oil into the distillation tower and carry out atmospheric and vacuum distillation. The distillate oil at ~350°C is then subjected to hydrofining. During the hydrofining process, the reaction pressure of the reactor is 10MPa, the reaction temperature is 350°C, the total space velocity of the oil feed is 0.45 / h, and the reaction hydrogen oil volume ratio is 900. Relative to the hydrotreating catalyst space velocity of 0.7 / h, relative to the hydrotreating catalyst space velocity of 1.2 / h, the catalyst in the hydrotreating process is Co-Mo-W / Al 2 o 3 , to obtain narrow cut naphthenic oil.

[0042] Take narrow-cut naphthenic oil, antioxidant, pour...

Embodiment 3

[0051] The invention provides a transformer oil with high flash point and low freezing point, which is composed of naphthenic oil with narrow fraction, antioxidant, pour point depressant, light sensitive agent and metal passivator. The weight percent of the narrow fraction naphthenic oil in the transformer oil is 97.5%. Put the naphthenic oil into the distillation tower and carry out atmospheric and vacuum distillation. The distillate oil at ~350°C is then subjected to hydrofining. During the hydrofinishing process, the reaction pressure of the reactor is 15MPa, the reaction temperature is 330°C, the total space velocity of oil feed is 0.55 / h, and the volume ratio of hydrogen to oil is 930. Relative to the hydrotreating catalyst space velocity of 0.75 / h, relative to the hydrotreating catalyst space velocity of 1.2 / h, the catalyst in the hydrotreating process is Ni-W-Co / Al 2 o 3 , to obtain narrow cut naphthenic oil.

[0052] Take narrow-cut naphthenic oil, antioxidant, pour ...

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Abstract

The invention provides high-flash-point low-condensation-point transformer oil. Narrow fraction naphthenic oil is taken as basic oil, and an antioxidant, a condensation depressant, a photosensitizing agent and a metal deactivator are added, wherein the narrow fraction naphthenic oil accounts for 97-98% of the transformer oil in percentage by weight, the antioxidant accounts for 0.5-1.0% of the transformer oil in percentage by weight, the condensation depressant accounts for 0.5-1.0% of the transformer oil in percentage by weight, the photosensitizing agent accounts for 0.1-0.5% of the transformer oil in percentage by weight, and the metal deactivator accounts for 0.1-0.5% of the transformer oil in percentage by weight. The invention further provides a preparation method of the high-flash-point low-condensation-point transformer oil. The closed-cup flash point of the transformer oil provided by the invention can be 195-220 DEG C, the condensation point of the transformer oil can be up to minus 55 DEG C, the security property of the transformer oil is greatly better than that of the conventional transformer oil, and the transformer oil is applicable to extremely cold areas because of the low condensation point. The transformer oil is excellent in gassing performance, and no gas can be easily generated after the transformer oil is used.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to transformer oil, in particular to a transformer oil with high flash point and low freezing point and a preparation method thereof. Background technique [0002] Transformer oil refers to a type of insulating oil used for insulation, cooling, information carrier and protection in oil-filled electrical equipment such as transformers, reactors, transformers, bushings, and oil switches. At present, mineral insulating oil is mainly used in transformers. This kind of transformer oil has good insulation and electrical properties, and the cost is not high. Therefore, it is widely used in the transformer market at present, but the closed flash point of mineral insulating oil is low (generally 145 ℃ Around), the freezing point is between -25 and -45°C, the gas evolution of this kind of oil is not good, and it is easy to produce acetylene and hydrogen after it is put into operation. With t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M177/00C10N40/16
CPCC10M169/04C10M169/044C10M177/00C10M2203/06C10M2203/1065C10M2205/02C10M2207/026C10M2209/084C10M2215/065C10M2215/223C10M2219/106C10N2030/00C10N2030/18C10N2040/16C10N2020/015C10N2060/02
Inventor 汪志刚沈庆
Owner 上海中孚油品集团有限公司
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