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Antioxidant composition and preparation method thereof

A composition and antioxidant technology, applied in the directions of lubricating compositions, additives, petroleum industry, etc., can solve the problems of increased lubricating oil viscosity, increased total acid value, strong corrosion, etc.

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the development of the aviation industry and the increase of aircraft flight speed, the temperature of the main body of turbojet engine lubricating oil has increased from 80°C in the early stage to the current 220°C. When the outlet temperature of the aeroengine oil is above 200°C, the oxidation of ordinary engine lubricating oil The speed will multiply, resulting in increased viscosity of the lubricating oil, increased total acid number, high corrosion, and large deposits at the same time

Method used

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  • Antioxidant composition and preparation method thereof
  • Antioxidant composition and preparation method thereof
  • Antioxidant composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Add 66.2g of N-(p-tert-octylphenyl)-1-naphthylamine to 72.2g 100°C kinematic viscosity=3.8mm 2 / s of trimethylolpropane saturated fatty acid ester, add 7.2g paraformaldehyde to the mixed system; under nitrogen environment, heat, stir and dissolve the mixed reaction system, keep the mixed system within the range of 80°C, and start to react Add 18g of reaction catalyst glacial acetic acid to the system; carry out the reaction at 100°C for 3h, and conduct vacuum distillation of the mixed reaction system at 110°C and vacuum <500Pa for 60mins, and continue to carry out sufficient decompression at no higher than 160°C and vacuum <500Pa. Distill under reduced pressure for 30mins to 180mins to obtain 142g of reaction product A1; the reaction product A1 mainly contains compounds of structural formula P-1, structural formula P-2, and structural formula P-3, and also contains a small amount of structural formula II'-1 and structural formula II' -2. The compound of structural formu...

Embodiment 2

[0133] Add 99g of N-(p-tert-octylphenyl)-1-naphthylamine into 108g of mixed polyol saturated fatty acid esters (81g of trimethylolpropane esters, 27g of dipentaerythritol esters), and add to the mixing system Add 12g of paraformaldehyde; heat, stir and dissolve the mixed reaction system under nitrogen atmosphere, keep the mixed system at about 90°C, start adding 22g of reaction catalyst glacial acetic acid to the reaction system; At 110°C, vacuum <500Pa vacuum distillation for 60mins, continue to carry out sufficient vacuum distillation at no higher than 160°C, vacuum <500Pa for 30mins to 180mins, to obtain 210g of reaction product A2; reaction product A2 mainly contains Structural formula P-1, structural formula P-2, the compound of structural formula P-3 similar structure (the difference is that the ester group wherein is the ester group of the mixed polyhydric alcohol saturated fatty acid ester used in this embodiment), contains relatively A small amount of compounds of str...

Embodiment 3

[0137] The N-(p-tert-octylphenyl)-1-naphthylamine of 132g is added to 156g four centistein polyol saturated fatty acid esters (wherein trimethylolpropane ester 78g, pentaerythritol ester 78g, both mass ratios are 1:1), add 30g of paraformaldehyde to the mixed system; heat, stir and dissolve the mixed reaction system under nitrogen environment, keep the mixed system at about 100°C, and start adding 30g of reaction catalyst glacial acetic acid to the reaction system; Carry out 3h at 100°C, carry out vacuum distillation of the mixed reaction system at 110°C, vacuum <500Pa for 60mins, continue to carry out sufficient vacuum distillation at no higher than 160°C, vacuum <500Pa for 30mins to 180mins, and obtain 153.5g Reaction product A3; Reaction product A3 mainly comprises the compound (difference is that the ester group wherein is the polyhydric alcohol saturated fatty acid ester used in this example) with structural formula P-1, structural formula P-2, structural formula P-3 simil...

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Abstract

The invention provides an antioxidant composition, a preparation method thereof and a lubricating oil composition containing the antioxidant composition. The antioxidant composition comprises an ester compound, a multifunctional oiliness agent and an optional amine compound, the structure of the ester compound is shown as a formula (I), and in the formula (I), at least one A group is selected from a monovalent group shown as a formula (II); wherein the definition of each group is shown in the specification. The antioxidant composition provided by the invention can significantly improve the oxidation stability and high-temperature corrosion resistance of lubricating oil, especially synthetic lubricating oil, and is especially suitable for aviation synthetic ester lubricating oil.

Description

Technical field [0001] The present invention relates to an antioxidant composition, in particular to an antioxidant composition that can be used in aviation synthetic ester lubricating oil and has high-temperature antioxidant and anti-corrosion properties. Background technique [0002] The high-temperature corrosion and oxidation stability of aircraft engine lubricants are important manifestations of the high-temperature oxidation resistance of aircraft engine oils. Lubricating oil undergoes a series of chemical changes under high-temperature oxygen induction and metal catalysis for a long time, producing a large amount of deposits such as sludge, which seriously affects the normal operation of aeroengines. Improving the high-temperature corrosion and oxidation stability of aircraft engine oil is of great significance to improving the working efficiency and service life of lubrication system equipment. [0003] With the development of the aviation industry and the increase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M141/06C10M169/04C10M177/00C10N40/25C10N30/08C10N30/10C10N30/12
CPCC10M141/06C10M169/045C10M177/00C10M2207/283C10M2215/065C10M2215/223C10M2223/041C10M2207/2835
Inventor 唐红金梁宇翔尹开吉贺景坚刘辉王玉睿涵
Owner CHINA PETROLEUM & CHEM CORP
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