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Modifier of airproof oil for dry type gas tank

A dry gas cabinet and sealing oil technology, applied in the petroleum industry, lubricating compositions, etc., can solve the problems of low safety factor, short service life of sealing oil, equipment corrosion, etc., to improve viscosity-temperature performance, prolong service life, The effect of retarding viscosity

Active Publication Date: 2008-01-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in order to improve the performance of sealing oil in China, measures to raise the temperature are usually adopted. There are disadvantages such as low safety factor, high energy consumption, serious equipment corrosion, and short service life of sealing oil, which lead to high consumption quota and production cost of sealing oil.
No patent has been applied for the addition of seal oil modifiers during the use of seal oil at home and abroad

Method used

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  • Modifier of airproof oil for dry type gas tank
  • Modifier of airproof oil for dry type gas tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 50 parts by weight of lubricating oil are placed in the reactor, and 7 parts by weight of polymethacrylate, 10 parts by weight of ethylene-propylene copolymer, 30 parts by weight of polyisobutylene and 3 parts by weight of dialkyl disulfide are added Substitute zinc phosphate, mix thoroughly in the reactor, pass nitrogen into the reactor, stir at 70-90°C for 2 hours, cool to room temperature and collect.

[0033] Conduct industrial tests in gas cabinet installations:

[0034] The change of the flash point of the sealing oil before and after adding the agent is shown in Figure 1 and Figure 2:

[0035] It can be seen from Figure 1 and Figure 2 that before the modifier is added, the flash point of the sealing oil shows a clear downward trend with the prolongation of the service time, and the flash point of the sealing oil has dropped by 46.97% in 5 months, which is close to the service limit of 60 °C. After adding the modifier, the decay of the flash point of the sealing ...

Embodiment 2

[0040] 20 parts by weight of lubricating oil are placed in the reactor, 5 parts by weight of polymethacrylate, 7 parts by weight of ethylene-propylene copolymer, 15 parts by weight of polyisobutylene and 2 parts by weight of dialkyl disulfide Substitute zinc phosphate, mix well in the reactor, pass nitrogen into the reactor, stir at 70-90°C for 1 hour, cool to room temperature and collect.

[0041] Carry out industrial test in gas cabinet device: result is as embodiment 1.

Embodiment 3

[0043] The lubricating oil of 80 parts by weight is placed in reactor, adds the polymethacrylate of 10 parts by weight, the ethylene-propylene copolymer of 15 parts by weight, the polyisobutylene of 45 parts by weight and the dialkyl disulfide of 5 parts by weight Substitute zinc phosphate, mix well in the reactor, pass nitrogen into the reactor, stir at 50-70°C for 3 hours, cool to room temperature and collect.

[0044] Carry out industrial test in gas cabinet device: result is as embodiment 1.

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Abstract

This invention relates to a modifier for sealing oil used in dry gas cabinet for sealing and preventing gas leakage. The modifier comprises: polymethacrylate 5-10 parts, ethylene-propylene copolymer 7-15 parts, polyisobutylene 10-50 parts, zinc dialkyldithiophosphate 2-5 parts, and lubricating oil 20-80 parts. The modifier can be in situ added to the sealing oil for sealing dry gas cabinet and increasing its service life. The modifier as such advantages as simple operation, low energy consumption, low cost, and high safety.

Description

Technical field: [0001] The invention relates to a modifier for the seal oil of dry gas cabinets used in refinery dry gas cabinets to seal and prevent gas leakage. Background technique: [0002] Gas holder sealing oil is a kind of lubricating oil, which can be used in dry gas holders of refineries to seal and prevent gas leakage. The sealing oil of the gas cabinet belongs to the mineral oil type sealing oil, and the absorption of petroleum gas is the disadvantage of the mineral oil type sealing oil. With the prolongation of the use time, a large amount of light components will be dissolved in the sealing oil, resulting in the flash point and viscosity of the sealing oil. , Density and other properties have dropped significantly, threatening the safe production and smooth operation of the gas holder device. This is an urgent problem to be solved in our factory, and it is also a common problem in domestic refineries. In order to solve the above problems, the methods commonly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M145/14C10N40/34
Inventor 范丽莉孟伟
Owner PETROCHINA CO LTD
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