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A kind of 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 the problems of unsatisfactory, high pour point, etc.

Active Publication Date: 2020-09-04
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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  • A kind of synthetic ester lubricating oil base oil with high viscosity index and preparation method thereof
  • A kind of synthetic ester lubricating oil base oil with high viscosity index and preparation method thereof
  • A kind of synthetic ester lubricating oil base oil with high viscosity index and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

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

[0051] (3) When the acid value of the reaction mixture decreases to ≤1mgKOH / g, stop the reaction, remove the xylene solvent and unreacted small molecule materials under reduced pressure, an...

Embodiment 2

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

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

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

[0058] (3) When the acid value of the reaction mixture decreases to ≤1mgKOH / g, stop the reaction, remove the xylene solvent and unreacted small molecule materials under reduced pressure, and th...

Embodiment 3

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

[0063] (1) Toluene, pyromellitic acid, triethanolamine, dihydroxy polyether, 1,10-decanediol, tetraethylene glycol, and catalyst are added to the reactor and mixed thoroughly and heated 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 cyclohexanoic acid to step (1), and continue to heat up to 150-170°C for secondary esterification reaction;

[0065] (3) When the acid value of the reaction mixture decreases to ≤1mgKOH / g, stop the reaction, remove the toluene solvent and unreacted small molecule materials under ...

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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, and specifically relates to a synthetic ester lubricating oil base oil with a 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 is mainly used for lubrication, auxiliary cooling, rust prevention, cleaning, sealing and buffering. The mechanism of action of lubricating oil is to reduce friction and wear between two relatively moving surfaces. In my country alone, the cost of materials lost due to mechanical wear caused by friction each year is also 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 lubricants are: 1. Mechanical oil; 2. Turb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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