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High temperature antioxidant for lubricating oil and preparation method thereof

A catalyst and high-boiling-point solvent technology, which is applied in the field of high-temperature antioxidants for lubricating oil and its preparation, can solve problems such as severe sludge and defects in the working range of single amine-type antioxidants, and achieve strong anti-oxidation ability, excellent performance, and work. The time-prolonged effect of

Active Publication Date: 2018-04-03
道骐科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned antioxidants have defects in varying degrees, such as: amine-type polymers have dispersibility problems in lubricating oil, and the sludge is serious
Although the alkylation of diphenylamine can better solve the problem of oil sludge, the single amine antioxidant has defects in the wide temperature range with low temperature

Method used

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  • High temperature antioxidant for lubricating oil and preparation method thereof
  • High temperature antioxidant for lubricating oil and preparation method thereof
  • High temperature antioxidant for lubricating oil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of high-temperature antioxidant for lubricating oil, specifically: add 30ml of n-decane into a 100ml three-necked reaction bottle, add 3g of diphenylamine and 3.6g of 2,6-di-tert-butylphenol under stirring, , slowly warm up to 140°C, add 8.5ml of di-tert-butyl peroxide dropwise, after the addition, continue to react for 3h, distill off unreacted di-tert-butyl peroxide, cool to room temperature naturally, refrigerate for 30min, and filter with suction , a small amount of n-decane was washed 3 times, dried to obtain 4.8g of the product of Example 1, the appearance of which was light yellow needle-like crystals, and the column chromatography quickly eluted the raw materials to obtain a high-purity compound (developing agent: V 环己烷 :V 二氯甲烷 =20:1) that is, 2,6-di-tert-butyl-4-dianilinophenol, its structural formula is as follows:

[0032] .

[0033] like figure 1 IR (KBr, vmax) spectrum shows: 3637 cm -1 The left and right sharp peaks are the stre...

Embodiment 2

[0042] A preparation method of high-temperature antioxidant for lubricating oil, specifically: add 30ml of n-decane into a 100ml three-necked reaction bottle, add 3.25g of 3-methyldiphenylamine and 3.6g of 2,6-di-tert-butylphenol under stirring , under the protection of nitrogen atmosphere, slowly raise the temperature to 140°C, add 8.5ml of di-tert-butyl peroxide dropwise, after the addition is complete, continue the reaction for 3h, distill off unreacted di-tert-butyl peroxide, and cool naturally to room temperature. Freeze for 30 minutes, filter with suction, wash with a small amount of n-decane three times, and dry to obtain 5.2 g of light yellow needle-like crystals.

Embodiment 3

[0044] A preparation method of high-temperature antioxidant for lubricating oil, specifically: add 30ml of n-decane into a 100ml three-necked reaction bottle, add 3.5g of 3-methoxydiphenylamine and 3.6g of 2,6-di-tert-butyl under stirring Phenol, under the protection of nitrogen atmosphere, slowly heat up to 140°C, add 8.5ml of di-tert-butyl peroxide dropwise, after the addition is complete, continue to react for 3h, distill off unreacted di-tert-butyl peroxide, and cool naturally to room temperature , frozen for 30 min, suction filtered, washed with a small amount of n-decane three times, and dried to obtain 5.6 g of powdery white solid.

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Abstract

The invention discloses a preparation method of a high-temperature antioxidant for lubricating oil, which uses 2,6-di-tert-butylphenol and substituted diphenylamine as raw materials, uses n-decane as a high-boiling solvent, and acts as a catalyst under an inert gas atmosphere. React at 120-170°C for 2-4 hours, and the product is post-processed to obtain the target product. The invention uses an antioxidant with excellent high-temperature anti-oxidation ability to replace diphenylamine and 2,6-di-tert-butylphenol to react, and can greatly prolong the working time of the lubricating oil under the condition of increasing the use temperature of the antioxidant. The product of the invention has the advantages of high temperature resistance, strong oxygen resistance, good solubility in lubricating oil, etc.; the high temperature and oxygen resistance test of lubricating oil proves that it has excellent performance and has broad application prospects.

Description

technical field [0001] The invention belongs to the field of lubricating oil additives, in particular to a high-temperature antioxidant for lubricating oil and a preparation method thereof. Background technique [0002] Lubricating oil is a liquid or semi-solid lubricant used on various mechanical equipment to reduce friction and protect machinery and processed parts. It mainly plays the roles of lubrication, cooling, rust prevention, cleaning, sealing and buffering. Lubricating oil generally consists of two parts: base oil and additives. The performance of lubricating oil can be effectively improved by adding appropriate additives, but it will undergo oxidation reactions under the action of air, water, metal, etc., especially in high-temperature working environments, and will quickly fail and deteriorate. So antioxidants must be added to prolong its working life. Antioxidants can effectively prolong the service life of lubricating oil and ensure the oxidation stability of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M133/14C07C215/82C07C213/02C10N30/10
Inventor 张晟卯苗长庆张玉娟杨广彬张平余张治军
Owner 道骐科技有限公司
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