Production method for extra high voltage transformer oil

A technology for transformer oil and production method, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process and other directions, can solve the problems of reducing the yield of the target product, environmental problems, etc., and achieve the effect of improving the product yield

Active Publication Date: 2007-07-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alkali washing in this method will not only bring a large amount of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example illustrates the effect of the method provided by the present invention.

[0026] The feed oil is naphthenic distillate at atmospheric pressure, and its properties are shown in Table 1. 300 ml of hydrotreating catalyst A and 150 ml of hydrotreating catalyst B were loaded into two fixed-bed hydrogenation reactors I and II respectively. Catalysts A and B are presulfurized before the raw material oil is passed through. The vulcanized oil is kerosene containing 2.0% by weight of carbon disulfide. The vulcanization conditions are: hydrogen partial pressure 12 MPa, temperature 370°C, total space velocity 1.0h 400, curing time 15 hours.

[0027] After presulfurization, the feed oil is switched through reactors I and II in sequence. The reaction conditions in the controlled hydrotreating reaction zone are: hydrogen partial pressure 12 MPa, temperature 340°C, space velocity 0.6h -1 , the ratio of hydrogen to oil is 800:1; the reaction conditions in the controlled ...

Embodiment 2

[0034] The feed oil is naphthenic distillate at atmospheric pressure, and its properties are shown in Table 3. 375 g of hydrotreating catalyst A and 110 g of hydrofinishing catalyst B were respectively loaded into two series-connected fixed-bed hydrogenation reactors I (300 ml) and II (150 ml). Catalysts A and B were presulfurized according to the method in Example 1 before the raw material oil was passed through.

[0035] After presulfurization, the feed oil is switched through reactors I and II in sequence. The reaction conditions in the controlled hydrotreating reaction zone are: hydrogen partial pressure 12 MPa, temperature 355°C, space velocity 0.4h -1 , the ratio of hydrogen to oil is 800:1; the reaction conditions in the controlled hydrofining reaction zone are: hydrogen partial pressure 12 MPa, reaction temperature 240°C, space velocity 0.8h -1 , the ratio of hydrogen to oil is 800:1, and the total space velocity is 0.27h -1 . The resulting oil is distilled to obta...

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Abstract

The invention provides a method for preparing super- voltage transformer oil. It comprises following steps: making naphthenic base oil contact with hydrogenation treatment catalyst and hydrogenation refining catalyst in sequence under hydrogenation process condition; said hydrogenation treatment catalyst contains a thermal- resistant inorganic oxidant carrier and cobalt and/ or nickel, molybdenum and/ or tungsten and fluoride or phosphorus that loaded on said carrier, the total airspeed of said naphthenic base oil is 0.2- 1 h-1, and the relative airspeed of hydrogenation treatment catalyst is 0.3- 1.2 h-1, the relative airspeed of hydrogenation refining catalyst is 0.3- 2h-1.

Description

technical field [0001] The invention relates to a production method of transformer oil, more specifically to a production method of ultra-high voltage transformer oil. Background technique [0002] Transformer oil is a liquid insulating and heat-conducting material produced from mineral oil, and its performance is related to the composition of the contained hydrocarbons. For example, straight-chain alkanes have poor low-temperature fluidity and are prone to hydrogen evolution, and are non-ideal components in transformer oil; aromatics have good anti-gassing performance, but polycyclic aromatic hydrocarbons have poor oxidation stability, are prone to oxidative discoloration and precipitate formation, and usually must be processed during processing remove or reduce its content. [0003] In the prior art, transformer oil can be produced by various techniques. For example, transformer oil is produced by hydrofining-furfural refining-clay refining proc...

Claims

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Application Information

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IPC IPC(8): C10G65/02
Inventor 刘广元王雪梅康小洪王奎郭庆洲王亚丽王鲁强
Owner CHINA PETROLEUM & CHEM CORP
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