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Lithium-based lubricating grease composition and preparation method for same

A grease composition and technology of lithium-based grease are applied in the field of grease to achieve the effects of increasing service life, improving product performance and improving structural stability.

Inactive Publication Date: 2014-01-22
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no public report on the use of mineral base oils with high acid value to prepare lithium-based greases

Method used

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  • Lithium-based lubricating grease composition and preparation method for same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Lithium base lubricating grease composition component and mass percent are as follows:

[0029] (1) Lithium 12-hydroxystearate soap 9.0%;

[0030] (2) Lithium stearate soap 2.5%;

[0031] (3) High acid value mineral base oil 10.0%;

[0032] (4) Ordinary mineral base oil 78.0%;

[0033] (5) Diphenylamine 0.46%;

[0034] (6) Benzotriazole 0.04%.

[0035] The process is: high acid value mineral base oil (acid value 7.5mgKOH / g, 100°C kinematic viscosity 10-12mm 2 / s) 100.0g, 300.0g of common mineral base oil were put into the kettle, 90.0g of 12-hydroxy lithium stearate soap and 25.0g of lithium stearate soap were added. Add 200.0g of ordinary mineral base oil and heat up and stir. When the temperature rises to 210-220°C, stop heating and keep the temperature for 5 minutes; stir and add 280.0g of ordinary mineral base oil, and perform rapid cooling; when the temperature is 140-150°C, add 4.6g of diphenylamine , Benzotriazole 0.4g; Stir evenly, take out of the kettle, ...

Embodiment 2

[0037] Lithium base lubricating grease composition component and mass percent are as follows:

[0038] (1) Lithium 12-hydroxystearate soap 8.1%;

[0039] (2) Lithium stearate soap 2.25%;

[0040] (3) High acid value mineral base oil 35.0%;

[0041] (4) Ordinary mineral base oil 54.4%;

[0042] (5) Diphenylamine 0.2%;

[0043] (6) Benzotriazole 0.05%.

[0044] The process is: high acid value mineral base oil (acid value 3.26mgKOH / g, 100°C kinematic viscosity 19.96mm 2 / s) 350.0g, 50.0g of ordinary mineral base oil were put into the kettle, 81.0g of 12-hydroxy lithium stearate soap and 22.5g of lithium stearate soap were added. Add 200.0g of ordinary mineral base oil and heat up and stir. When the temperature rises to 210-220°C, stop heating and keep the temperature for 5 minutes; stir and add 294.0g of ordinary mineral base oil for rapid cooling; when the temperature is 140-150°C, add 2.0g of diphenylamine , Benzotriazole 0.5g. Stir evenly, take it out of the kettle, and...

Embodiment 3

[0046] Lithium base lubricating grease composition component and mass percent are as follows:

[0047] (1) Lithium 12-hydroxystearate soap 7.7%;

[0048] (2) Lithium stearate soap 2.13%;

[0049] (3) High acid value mineral base oil 28.0%;

[0050] (4) Ordinary mineral base oil 61.35%;

[0051] (5) Diphenylamine 0.8%;

[0052] (6) Benzotriazole 0.02%.

[0053] The process is: high acid value mineral base oil (acid value 2.41mgKOH / g, 100°C kinematic viscosity 23.61mm 2 / s) 280.0g, 120.0g of ordinary mineral base oil were put into the kettle, 77.0g of 12-hydroxy lithium stearate soap and 21.3g of lithium stearate soap were added. Add 200.0g of ordinary mineral base oil and heat up and stir. When the temperature rises to 210-220°C, stop heating and keep the temperature for 5 minutes; stir and add 293.5g of ordinary mineral base oil for rapid cooling; when the temperature is 140-150°C, add 8.0g of diphenylamine , Benzotriazole 0.2g; Stir evenly, take out of the kettle, and gr...

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Abstract

The invention provides a lithium-based lubricating grease composition and a preparation method for the lithium-based lubricating grease composition. The lithium-based lubricating grease is prepared by saponifying special high-acid value mineral base oil. The preparation method comprises the following steps of putting the high-acid value mineral base oil into a kettle, adding 12-lithium hydroxyl-stearate soap and lithium stearate soap, and performing stirring and heating; when temperature rises to 210 to 220 DEG C, keeping the temperature, and performing stirring for 1 to 5 minutes; putting ordinary mineral base oil into the kettle, quickly cooling the materials, and adding an additive when the temperature reaches 140 to 150 DEG C; uniformly stirring the materials, and discharging the materials from the kettle; grinding the materials to obtain a finished product by using a three-roller grinding machine. According to the lubricating grease composition, conventional base oil resources in China are reasonably utilized instead of a naphthenic acid raw material, so that the production cost of the lubricating grease is remarkably lowered; the lubricating grease has high mechanical stability, colloid stability and lubricating performance, and the friction and abrasion conditions of mechanical equipment during operation can also be effectively improved; the produced lubricating grease can be used for lubricating automobiles, construction machinery and other mechanical equipment.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, in particular to a lithium-based lubricating grease composition with high acid value mineral oil as base oil and a preparation method thereof. Background technique [0002] Lithium-based grease is a grease made from lithium soap of natural fatty acids (including 12-hydroxystearic acid and stearic acid) thickened with medium-viscosity mineral base oil. The basic raw materials for the production of lithium-based grease are fatty acid, lithium hydroxide and base oil. [0003] In mineral base oils used in lithium-based greases, aromatics and naphthenes in the base oils are more capable of forming a stable grease structure than alkanes. Lithium-based grease prepared with fatty acid lithium soap, if paraffin-based lubricating oil is used as the base oil, the product stability is better; when naphthenic lubricating oil is used as the base oil, the consistency of the product is greater than t...

Claims

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Application Information

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IPC IPC(8): C10M101/02
Inventor 王兆坤王先会吴宝杰冯强高艳青
Owner CHINA PETROLEUM & CHEM CORP
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