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Prepn of antioxidant for lubricant oil

An antioxidant and lubricating oil technology, applied in the field of preparation of lubricating oil antioxidants, can solve the problems of influence, dosage limit, oil oxidation stability and oil anti-wear performance decline, etc., to achieve convenient use, Easy-to-dissolve effect

Inactive Publication Date: 2003-11-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to environmental protection requirements, oil tends to have low ash and low phosphating, so the dosage of this agent is limited. Affected by it, the oil oxidation stability and oil anti-wear performance of the oil also decrease with the reduction of its dosage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 67 grams (0.32mol) of mixed phenol T502, 36 grams of formaldehyde solution (0.45mol), and 27 grams (0.36mol) of carbon disulfide were added successively in a 250ml glass reaction bottle equipped with a condenser, stirring and a thermometer, heated and stirred for 40 At ℃, add 41.2 grams (0.32mol) of di-n-butylamine dropwise, heat is released during the dropwise addition, and the dropping temperature is controlled at 40-45°C. After adding di-n-butylamine dropwise in 1 hour, after stirring for 30 minutes, the temperature rises to 85± 2°C, react for 5 hours, after the reaction, cool down to 50°C, extract the reaction product with 75 grams of gasoline, stir for 5 minutes, then pour it into a 250ml separating funnel, remove the lower layer of water, add 50ml of water, wash and extract The product was separated by standing, and the water layer was separated. Repeat the washing process three times until the pH value is neutral, pour it into a 250ml distillation bottle, and dis...

Embodiment 2

[0016] Add 62 grams (0.3mol) of 2,6-di-tert-butylphenol, 25 grams (0.3mol) of formaldehyde solution, and 23 grams (0.3mol) of carbon disulfide into a 250ml glass reaction bottle equipped with a condenser, agitator and a thermometer in sequence. During heating and stirring, when the temperature rises to 40°C, the material melts, and 47.1 grams (0.3mol) of diamylamine is added dropwise, and the reaction temperature is controlled at 40-45°C. After 1 hour of dropping, stir for 30 minutes, and heat up to 85±2°C to react 6 Hours, after the reaction, cool down to 50°C, add 70 grams of gasoline to extract the reaction product, then pour it into a 250ml separatory funnel, separate the water layer, then add 75ml of water, wash the reaction product, let stand to separate layers, and separate the water layer. The process of washing with water was repeated three times until the pH value was neutral, poured into a 250ml distillation bottle, and subjected to normal and reduced pressure disti...

Embodiment 3

[0018] Add 67 grams (0.32mol) of mixed phenol (T502), 32.4 grams (0.40mol) of formaldehyde solution, and 27 grams (0.36mol) of carbon disulfide into a 250ml glass reaction bottle equipped with a condenser, stirring and thermometer, and stir to raise the temperature to 40°C 47.1 grams (0.32mol) of diamylamine was added dropwise, and the temperature was controlled at 40-45°C. After adding dropwise for 1 hour, stirred for 30 minutes, raised the temperature to 85±2°C, and condensed for 6 hours. After the reaction, the temperature was lowered for 50 ℃, add gasoline to extract the reaction product, then pour it into a 250ml separatory funnel, remove the lower layer of water, add 75ml of water to wash the product, let stand to separate layers, and remove the water layer. Repeated washing with water three times, pH value to neutral, poured into a 250ml distillation bottle, and distilled under normal and reduced pressure to obtain a brown viscous liquid product. Product yield 96%. The...

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PUM

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Abstract

The preparation of antioxidant for lubricant oil includes the condensation reaction between the mixture liquid containing shielding phenol, aldehyde and CS2 and added dialkyl amine at 40-120 deg.c and product separation and collection. The prepared antioxidant has the integrated structure of both free radical terminator and peroxide decomposing agent and has the capacity of trapping free radicaland decomposing hydrogen peroxide to protect the oxidation safety of oil product. Containing S element in its structure makes it possess certain antiwear effect. The product of the present invention is liquid, easy to dissolve and compatible with other functional additives, and may be used in industrial lubricant oil and internal combustion engine oil.

Description

technical field [0001] The invention belongs to lubricating oil additives, in particular to the preparation of a lubricating oil antioxidant. technical background [0002] As a lubricating oil, it should be able to meet the requirements of use. Usually, mechanical equipment needs to be lubricated to reduce friction during operation. During use, lubricating oil is easily oxidized and deteriorated by factors such as ambient temperature, oxygen in the air, and metal catalysis, and produces alcohol. Low-molecular-weight compounds such as esters, ketones, and acids will further generate high-molecular-weight polymers, that is, deposits, through polycondensation reaction, resulting in increased oil viscosity, poor lubricating performance, increased wear, and greatly reduced lubrication. The function of the oil will shorten the service life of the oil, and even seriously corrode the mechanical equipment. Therefore, the oxidation stability of oil is a particularly important indicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M135/00
Inventor 李新华杨永璧李华张玉淑吴湘洪
Owner CHINA PETROLEUM & CHEM CORP
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