High-temperature anti-oxidant for lubricating oil and preparation method of high-temperature anti-oxidant

An anti-oxidant and lubricating oil technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of amino hydroxyl compounds, etc., can solve problems such as severe oil sludge, defects in the working range of single amine antioxidants, etc., and achieve anti-oxidation ability Strong, excellent performance, easy post-processing effect

Active Publication Date: 2015-11-11
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 anti-oxidant for lubricating oil and preparation method of high-temperature anti-oxidant
  • High-temperature anti-oxidant for lubricating oil and preparation method of high-temperature anti-oxidant
  • High-temperature anti-oxidant for lubricating oil and preparation method of high-temperature anti-oxidant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a 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, and 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 3 hours, distill off the unreacted di-tert-butyl peroxide, naturally cool to room temperature, refrigerate for 30 minutes, and filter with suction. A small amount of n-decane was washed 3 times and dried to obtain 4.8g of the product of Example 1. The appearance was light yellow needle-like crystals, and the column chromatography quickly eluted the raw materials to obtain a high-purity compound (developer: 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] Such as figure 1 IR (KB...

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 flask, add 3.25g of 3-methyldiphenylamine and 3.6g of 2,6-di-tert-butylphenol under stirring, nitrogen Under the protection of the 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 the unreacted di-tert-butyl peroxide, cool naturally to room temperature, and freeze for 30min , filtered with suction, washed with a small amount of n-decane three times, and dried to obtain 5.2 g of light yellow needle crystals.

Embodiment 3

[0044] A preparation method for high-temperature antioxidants for lubricating oils, specifically: add 30ml of n-decane into a 100ml three-necked reaction flask, add 3.5g of 3-methoxydiphenylamine 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 the unreacted di-tert-butyl peroxide, cool naturally to room temperature, freeze After 30 minutes, filter with suction, wash with a small amount of n-decane three times, and dry to obtain 5.6 g of powdery white solid.

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Abstract

The invention discloses a preparation method of a high-temperature anti-oxidant for lubricating oil. 2,6-di-tert-butyl phenol and substituted diphenylamine are taken as raw materials, and n-decane is taken as a high-boiling-point solvent. The materials above are reacted at 120-170 DEG C for 2-4 h under the action of a catalyst and in the presence of a noble gas to obtain a product, and the product is treated to obtain the target product. Anti-oxidants, of 2,6-di-tert-butyl phenol and substituted diphenylamine, with excellent antioxidant performance are used in the invention. The use temperature of the anti-oxidant is increased, and the working time of lubricating oil is greatly prolonged. The high-temperature anti-oxidant for lubricating oil has advantages of high temperature resistance, good anti-oxidant performance, and good solubility in lubricating oil. It is proved through a high-temperature antioxidant experiment that the high-temperature anti-oxidant has excellent properties and a bright application prospect.

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 Applications(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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