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Durable anti-oxidation and anti-coking synthetic ester for high temperature chain oil and preparation method thereof

A chain oil, anti-oxidation technology, applied in the reaction preparation of ester group and hydroxyl group, organic chemistry, petroleum industry, etc., can solve the problems of no anti-oxidation performance, loss of anti-oxidation performance, easy inactivation to form carbides, etc. Excellent anti-oxidation and long-lasting anti-coking performance, meeting the effect of energy saving and long-lasting anti-oxidation ability

Active Publication Date: 2022-05-06
黄山市强力化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthetic ester product itself does not have anti-oxidation properties, and the added antioxidants are easily deactivated at high temperatures to form carbides, resulting in precipitation in the synthetic esters and loss of anti-oxidation properties, so it cannot be used for a long time (more than 8 months) For higher temperature such as 240 ~ 280 ℃

Method used

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  • Durable anti-oxidation and anti-coking synthetic ester for high temperature chain oil and preparation method thereof
  • Durable anti-oxidation and anti-coking synthetic ester for high temperature chain oil and preparation method thereof
  • Durable anti-oxidation and anti-coking synthetic ester for high temperature chain oil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of durable anti-oxidation and anti-coking type synthetic ester for high-temperature chain oil comprises the following steps:

[0041] (1) Fully mix 8 mol of trimethylolpropane, 8 mol of 1,6-hexanediol, 5 mol of pentaerythritol and sodium hydroxide, heat to 115°C so that it can melt and flow, and obtain a reaction mixture;

[0042] (2) Add 20 mol of methyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate to the reaction mixture in step (1), continue to heat up to 145°C, and then start the vacuum to carry out the transesterification reaction 3h, vacuum degree ≤ -0.095Mpa;

[0043] (3) When the hydroxyl value of the alcoholic hydroxyl group of the mixture obtained in the transesterification reaction in (2) is less than 350mgKOH / g, stop the reaction, add water to the mixture in (2) for washing, layering, and separate the water phase to remove sodium hydroxide ;

[0044] (4) When the pH of the mixture in (3)<9, remove the remaining washing water in the ...

Embodiment 2

[0049] The method of embodiment 2 is the same as that of embodiment 1, and the difference is that the consumption of raw materials is slightly different, specifically as shown in table 1 below:

[0050] The raw material consumption of table 1 embodiment 2~5

[0051]

[0052]

[0053] Viscosity and acid value detection result of product in the embodiment of table 2

[0054] Viscosity(100℃) / mm 2 / s

[0055] As can be seen from Table 2, the appearance of the products in Examples 2 to 5 is light yellow transparent liquid, and the viscosity is equivalent to the acid value. This illustrates that the performance of the synthetic ester product produced by the method of the present invention is relatively stable.

Embodiment 6

[0073] Regarding the acid value, viscosity index, thermal stability and carbonization of the product of the present invention, and the color of the oil product after the high-temperature test, the inventor has carried out the following detection experiments.

[0074] Test Methods:

[0075] Determination of acid value is based on GB / T7304-2014 "Potentiometric titration method for the determination of acid value of petroleum products";

[0076] Viscosity index is determined according to GB / T1995-1998 "Calculation Method of Viscosity Index of Petroleum Products";

[0077] Thermal stability, carbon formation and oil color after high temperature test are tested according to SH / T0300-92 "Crankcase Simulation Test Method (QZX Method);

[0078] The anti-oxidation performance is tested according to SH / T0193-2008 "Determination of Oxidation Stability of Lubricating Oil by Rotary Oxygen Bomb Method" at 240°C. The longer the oxidation induction period, the better the anti-oxidation perfo...

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Abstract

The invention belongs to the technical field of synthetic ester preparation, and in particular relates to a durable anti-oxidation and anti-coking synthetic ester for high-temperature chain oil and a preparation method thereof. The synthetic ester product provided by the present invention is composed of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) methyl propionate, trimethylolpropane, 1,6-hexanediol, pentaerythritol, hydrogen Sodium oxide, tetrabutyl titanate, trifluoroheptanoic acid, and xylene are the main raw materials for step-by-step reaction. The synthetic ester product has its own hindered phenolic group, which has long-lasting anti-oxidation ability, and the synthetic ester chain contains fluorine element, and its own anti-oxidation and long-lasting anti-coking performance are also relatively excellent, and the synthetic ester is not easy to coke at high temperature, so it can be widely used in Used in high temperature chain oils that require high anti-coking.

Description

technical field [0001] The invention belongs to the technical field of synthetic ester preparation, and in particular relates to a durable anti-oxidation and anti-coking synthetic ester for high-temperature chain oil and a preparation method thereof. Background technique [0002] As a common natural phenomenon, friction and wear not only consume energy during operation, but also affect the life of machinery, causing huge economic losses and environmental impact. Lubrication is an effective means to reduce friction, reduce or even avoid wear. Good lubrication can reduce friction, reduce energy consumption, reduce wear, prolong the life of mechanical equipment, and produce good social and economic benefits. [0003] As a main lubricant, lubricating oil is widely used in mechanical equipment. In addition to the basic functions such as lubrication, the lubricating oil is mainly reflected in the following aspects. (1) Increase lubrication and control friction; (2) Anti-oxidatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/03C07C69/732C10M129/76
CPCC07C67/03C10M129/76C10M2207/281C07C69/732
Inventor 叶光华王永垒叶震南姚武方少平
Owner 黄山市强力化工有限公司