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Low temperature switch oil and preparation method thereof

A switching oil, low temperature technology, used in the petroleum industry, base materials, lubricating compositions, etc., can solve the problems of less electrical switching oil, poor arc extinguishing effect, carbonization of oil products, etc., to achieve fast flow speed, reduce burning loss, Low pour point effect

Active Publication Date: 2021-09-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are few electrical switch oils in China, and most of them are not environmentally friendly, and the pour point is high, so they are not suitable for use in cold climate areas. Therefore, mineral transformer oil is often used instead of electrical switch oil, but mineral transformer oil has problems The arc extinguishing effect is poor, and the carbonization tendency of the oil is serious

Method used

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  • Low temperature switch oil and preparation method thereof
  • Low temperature switch oil and preparation method thereof
  • Low temperature switch oil and preparation method thereof

Examples

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preparation example Construction

[0027] The following example is the preparation method of the low-temperature switch oil of the present invention, wherein the raw material is naphthenic crude oil and / or paraffin-based crude oil, and the relevant parameters of naphthenic crude oil and paraffin-based crude oil are shown in Table 1 below.

[0028] Table 1 Relevant parameters of naphthenic crude oil and paraffinic base crude oil

[0029] project naphthenic oil paraffinic base oil experiment method Kinematic viscosity at 40℃, mm 2 / s

Embodiment 1

[0031] 1. Catalyst presulfidation

[0032] The catalyst in this embodiment includes 4% of nickel oxide, 5% of molybdenum oxide, 3% of cobalt oxide, 3% of tungsten oxide and 85% of silicon oxide carrier according to weight percentage. Among them, the average pore diameter of the catalyst is The average pore volume is 0.2cm 3 / g, the average specific surface area is 190m 3 / g, the average strength is 100N / mm.

[0033] The above-mentioned catalyst is loaded into the hydrogenation reaction fixed-bed reactor and utilizes sulfurized oil to contain carbon disulfide CS 2 The kerosene is vulcanized, and the vulcanization process conditions are: hydrogen sulfide partial pressure 4MPa, vulcanization temperature 380°C, total space velocity 0.2h -1 , the volume ratio of hydrogen to oil is 800:1, and the vulcanization time is 15 hours. The presulfided catalyst is ready for use.

[0034] 2. Catalytic hydrogenation

[0035] This embodiment selects naphthenic crude oil as raw material, a...

Embodiment 2

[0043] 1. Catalyst presulfidation

[0044] The catalyst in this embodiment includes 10% of nickel oxide, 4% of molybdenum oxide, 2% of cobalt oxide, 7% of tungsten oxide and 77% of silicon oxide carrier according to weight percentage. Among them, the average pore diameter of the catalyst is The average pore volume is 1.5cm 3 / g, the average specific surface area is 250m 3 / g, the average strength is 60N / mm.

[0045] The above-mentioned catalyst is loaded into the hydrogenation reaction fixed-bed reactor and utilizes sulfurized oil to contain carbon disulfide CS 2 The kerosene is vulcanized, and the vulcanization process conditions are: hydrogen sulfide partial pressure 10MPa, vulcanization temperature 300°C, and total space velocity 1.5h -1 , the volume ratio of hydrogen to oil is 700:1, and the vulcanization time is 20 hours. The presulfided catalyst is ready for use.

[0046] 2. Catalytic hydrogenation

[0047] This embodiment selects naphthenic crude oil as raw mate...

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Abstract

The invention provides a low-temperature switch oil and a preparation method thereof. The low-temperature switch oil comprises the following components: a low-temperature switch base oil and a phenolic antioxidant, and the weight of the phenolic antioxidant accounts for the weight of the low-temperature switch base oil. 0.1%-0.4%; the low-temperature switch base oil is prepared according to the following method: catalytic hydrogenation of naphthenic crude oil and / or paraffin-based crude oil to generate crude product oil, collecting the fraction of the crude product oil at 220-290 ° C, The fraction is the low temperature switch base oil. The low-temperature switch oil of the present invention has low kinematic viscosity at high and low temperatures, excellent oxidation stability, low oil carbonization tendency, low pour point, is suitable for low-temperature environments, has good solubility to oil sludge produced by oil deterioration, and is environmentally friendly. Require.

Description

technical field [0001] The invention relates to insulating oil technology for power equipment, in particular to a low-temperature switch oil and a preparation method thereof, belonging to the technical field of power equipment. Background technique [0002] Transformer oil switch, also known as high-voltage circuit breaker, is an important electrical device in a transformer device. Its main function is to cut off or connect the circuit with load, and to automatically cut off the short-circuit current when a short circuit occurs. When the transformer oil switch cuts off the current circuit, the moving and static contacts in the switch are separated, and an arc is generated between the static and moving contacts. The arc temperature can reach thousands of degrees Celsius, and high temperature will cause damage to conductive parts and insulators , threatening the safe operation of electrical equipment. Therefore, it is required that the high-voltage switch can quickly extingui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M101/02C10M169/04C10N30/02C10N30/10C10N40/16
CPCC10M101/02C10M101/025C10M169/04C10M2203/1065C10M2205/163C10M2207/026C10N2030/02C10N2030/10C10N2040/16C10N2030/64
Inventor 柯友胜马蕊燕张静何军
Owner PETROCHINA CO LTD