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Diester base oil and preparation method thereof

A technology of base oil and diester, applied in the field of lubricating oil, can solve the problem of no technical breakthrough in viscosity index, and achieve the effect of high application value

Active Publication Date: 2021-01-12
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent is mainly aimed at low-temperature performance, by mixing dibasic acid and a single alcohol component (2-ethyl-1-hexanol) to synthesize a diester as a base oil, and there is no technical breakthrough in viscosity index

Method used

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preparation example Construction

[0033] The present invention also provides a kind of preparation method of above-mentioned diester base oil, comprises the following steps:

[0034] Under the condition of catalyst, dibasic acid and isomeric alcohol are subjected to esterification reaction at 140-200°C to obtain diester base oil.

[0035] In the preparation method of the diester base oil provided by the present invention, the components and proportions of the raw materials used are the same as above, and will not be repeated here.

[0036] In some embodiments of the present invention, the preparation method includes:

[0037] After mixing dibasic acid and isomeric alcohol, esterification reaction is carried out under the action of catalyst to obtain diester base oil.

[0038] In some embodiments of the present invention, the catalyst includes one or more of concentrated sulfuric acid, stannous oxide, sodium bisulfate, activated carbon, titanate and zinc oxide. In some embodiments of the present invention, th...

Embodiment 1

[0052] Add 277.67g (1.9mol) of adipic acid, 20.23g (0.1mol) of sebacic acid, and 169.30g (1.3mol) of isooctyl alcohol into a 1500mL three-necked flask equipped with a thermometer, stirring paddle, condenser, and water separator. , 701.26g (3.5mol) of isotridecanol, 2.4g of stannous oxide, start stirring and start heating, raise the temperature to 180°C, and keep the temperature constant for 6 hours. After no more reaction water is produced, start the vacuum pump and adjust the vacuum degree to 0.096MPa. Dealcoholization was carried out at 220°C for 1 hour, the temperature was lowered to 65°C, and the reaction solution was distilled and filtered to obtain 940 g of the product diester base oil.

Embodiment 2

[0054]Add 292.28g (2.0mol) of adipic acid, 20.23g (0.1mol) of sebacic acid, and 192.44g (1.33mol) of isononyl alcohol into a 1500mL three-necked flask equipped with a thermometer, stirring paddle, condenser, and water separator. , Isotridecanol 742.51g (3.71mol), stannous oxide 2.0g, start stirring and start heating, gradually raise the temperature to 200°C, keep the temperature constant for 8h, after no more reaction water is produced, start the vacuum pump, adjust the vacuum degree to 0.09MPa, Dealcoholization was carried out at 220°C for 1 hour, the temperature was lowered to 65°C, and the reaction liquid was distilled and filtered to obtain 860 g of the product diester base oil.

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Abstract

The invention relates to the technical field of lubricating oil, in particular to diester base oil and a preparation method thereof. The diester base oil is prepared from raw materials including binary acid and isomeric alcohol through esterification reaction; the binary acid comprises one or two of adipic acid and sebacic acid; and the isomeric alcohol comprises one or more of isooctyl alcohol, isononyl alcohol, isodecyl alcohol and isotridecanol. The diester base oil provided by the invention has a high viscosity index and a low pour point, the low pour point can ensure good low-temperatureperformance, the high viscosity index can be used for a high operating temperature, and the diester base oil can be widely applied to production of lubricants in aviation, turbines, compressors and other industries. Particularly, the lubricating oil has high application value in the field of engine lubrication with high requirements on low-temperature performance and high operating temperature. Experiments show that the pour point of the diester base oil provided by the invention is not higher than 60 DEG C, and the viscosity index is not less than 140.

Description

technical field [0001] The invention relates to the technical field of lubricating oil, in particular to a diester base oil and a preparation method thereof. Background technique [0002] The emergence of diester is to solve the problem of low-temperature start-up of the lubrication systems of tanks and aircrafts during the two world wars. With the continuous advancement of science and technology, the working conditions of lubricating parts of mechanical equipment are becoming increasingly harsh, and the performance requirements for lubricating oil are also continuously improving. The performance advantage of diesters is good low-temperature performance, and has been widely used in lubrication devices in aviation, aerospace, manufacturing and other fields. Now that the application environment is increasingly harsh, there is a higher demand for the high-temperature viscosity of diesters. Realizing the high viscosity index of diester is the current research difficulty, so the...

Claims

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Application Information

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IPC IPC(8): C10M105/36C10N30/02C10N30/08C10N30/06
CPCC10M105/36C10M2207/2825
Inventor 彭良溢李志涛赵玉贞吴旭东刘月皞汤倩云
Owner CHINA PETROLEUM & CHEM CORP
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