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Synthetic ester lubricating oil base oil with high viscosity index and preparation method thereof

A lubricating oil base oil and synthetic ester technology, applied in the field of lubricating oil base oil, can solve problems such as high pour point and unsatisfactory

Active Publication Date: 2018-02-13
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

[0005] For example, CN102911726A obtains a high-viscosity index base oil product with a viscosity index of about 110 through deep hydroisomerization, and CN 103773442A obtains a high-viscosity index base oil with a viscosity index greater than 120 through hydrogenation to make ring-opening reactions of naphthenes; CN106590837A uses Add phosphite di-n-propyl fat, ethopabate and other substances in the lubricating oil formula to improve the viscosity index of the lubricating oil; CN102089270A discloses a kind of oleic acid-based synthetic ester base oil with oleic acid as the main raw material, Has a high viscosity index, but the pour point of the product obtained by this method is too high to be satisfactory

Method used

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  • Synthetic ester lubricating oil base oil with high viscosity index and preparation method thereof
  • Synthetic ester lubricating oil base oil with high viscosity index and preparation method thereof
  • Synthetic ester lubricating oil base oil with high viscosity index and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] A synthetic ester lubricant base oil with a high viscosity index, the main raw materials are 5mol of pyromellitic acid; 2mol of triethanolamine; 3mol of dihydroxy polyether; 20mol of 1,10-decanediol; 10mol of tetraethylene glycol; 20mol of n-octanoic acid; 20 mol of cyclohexanecarboxylic acid; 20 mol of xylene; 0.1 mol of monobutyl tin triisooctanoate, prepared by the following method:

[0049] (1) Add xylene, pyromellitic acid, triethanolamine, dihydroxy polyether, 1,10-decanediol, tetraethylene glycol, and catalyst into the reactor and mix them thoroughly, then heat to 140-150°C for dehydration and esterification reaction;

[0050] (2) Stop heating when the acid value is less than or equal to 4mgKOH / g, add n-octanoic acid and cyclohexanecarboxylic acid in step (1), and continue to heat up to 150-170°C for secondary esterification;

[0051] (3) When the acid value of the reaction mixture is reduced to ≤1mgKOH / g, the reaction is stopped, the xylene solvent and unreacte...

Embodiment 2

[0055] A synthetic ester lubricant base oil with a high viscosity index, the main raw materials are 12mol of pyromellitic acid; 5mol of triethanolamine; 8mol of dihydroxy polyether; 5mol of 1,10-decanediol; 22mol of tetraethylene glycol; 35mol of n-octanoic acid; 8 mol of cyclohexanecarboxylic acid; 5 mol of xylene; 0.5 mol of monobutyl tin triisooctanoate, prepared by the following method:

[0056] (1) Add xylene, pyromellitic acid, triethanolamine, dihydroxy polyether, 1,10-decanediol, tetraethylene glycol, and catalyst into the reactor and mix them thoroughly, then heat to 140-150°C for dehydration and esterification reaction;

[0057] (2) Stop heating when the acid value is less than or equal to 4mgKOH / g, add n-octanoic acid and cyclohexanecarboxylic acid in step (1), and continue to heat up to 150-170°C for secondary esterification;

[0058] (3) When the acid value of the reaction mixture is reduced to ≤1mgKOH / g, the reaction is stopped, the xylene solvent and unreacted ...

Embodiment 3

[0062] A synthetic ester lubricant base oil with a high viscosity index, the main raw materials are 3mol of pyromellitic acid; 3mol of triethanolamine; 6mol of dihydroxy polyether; 16mol of 1,10-decanediol; 20mol of tetraethylene glycol; 12mol of n-octanoic acid; 25 mol of cyclohexanecarboxylic acid; 15 mol of toluene; 0.2 mol of monobutyl tin triisooctanoate, prepared by the following method:

[0063] (1) Add toluene, pyromellitic acid, triethanolamine, dihydroxy polyether, 1,10-decanediol, tetraethylene glycol, and catalyst into the reactor and mix them thoroughly, then heat to 140-150°C for dehydration esterification reaction ;

[0064] (2) Stop heating when the acid value is less than or equal to 4mgKOH / g, add n-octanoic acid and cyclohexanecarboxylic acid in step (1), and continue to heat up to 150-170°C for secondary esterification;

[0065] (3) When the acid value of the reaction mixture is reduced to ≤1mgKOH / g, the reaction is stopped, the toluene solvent and unreacte...

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Abstract

The invention provides synthetic ester lubricating oil base oil with a high viscosity index and a preparation method thereof. The synthetic ester lubricating oil base oil is prepared by taking pyromellitic acid, triethanolamine, dihydroxy polyether, 1,10-decanediol, tetraethylene glycol, n-octanoic acid, cyclohexanecarboxylic acid and an organic solvent as main raw materials and carrying out sub-step esterification reaction. The synthetic ester lubricating oil base oil provided by the invention has a very high viscosity index and a relatively low pour point and the pour point can reach -45 DEGC; in a lubricating oil formula, a viscosity index modifier does not need to be additionally added and the requirements on high-viscosity lubricating oil can be met.

Description

technical field [0001] The invention belongs to the field of lubricating oil base oils, in particular to a synthetic ester lubricating oil base oil with high viscosity index and a preparation method thereof. Background technique [0002] Lubricating oil is a liquid or semi-solid lubricant used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and processed parts. It mainly plays the roles of lubrication, auxiliary cooling, rust prevention, cleaning, sealing and buffering. The mechanism of action of lubricating oil is to reduce friction and reduce wear when added between two relative moving surfaces. In our country alone, the cost of materials lost due to mechanical wear caused by friction is immeasurable. Therefore, lubricating oil has a wide range of applications in social development and progress, and is a necessity for any mechanical operation. [0003] At present, the common types of lubricating oil are: 1. Mechanical oil;...

Claims

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Application Information

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IPC IPC(8): C10M111/04C10M177/00C10N20/02
CPCC10M111/04C10M177/00C10M2207/2805C10M2209/1033C10M2215/041C10N2020/02
Inventor 叶光华王永垒吴福义方少平冯凯
Owner 黄山市强力化工有限公司
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