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High-temperature, water-resistant, long-life complex lithium-calcium-based lubricating grease and preparation method thereof

A calcium-based grease, long-life technology, applied in the field of grease, can solve the problems of less complex lithium-based grease, short grease soap fibers, weak ability of fibers to agglomerate into grease, etc., to achieve water resistance and extreme pressure resistance. The effect of improving grinding capacity, saving energy consumption and stable product quality

Active Publication Date: 2011-12-21
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the acid destruction of the small molecule structure C 12 ~C 24 The thickening ability of the monobasic organic acid leads to shorter grease soap fibers, so that the fiber agglomeration makes the fat-forming ability weaker
Therefore, although there are currently many patents on the formulation process that can be used to form fat under laboratory conditions, there are still few lithium-complex greases that can be mass-produced through this formulation process.

Method used

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  • High-temperature, water-resistant, long-life complex lithium-calcium-based lubricating grease and preparation method thereof
  • High-temperature, water-resistant, long-life complex lithium-calcium-based lubricating grease and preparation method thereof
  • High-temperature, water-resistant, long-life complex lithium-calcium-based lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 300g (parts by mass of 15.1%) 12 hydroxystearic acid and 61g (parts by mass of 3.1%) salicylic acid into 1600g (parts by mass of 80.4%) base oil, mix and heat to 60~90℃ , Adding 28g (1.4% by mass) of boric acid and 70g of monohydrate lithium hydroxide saponification compound for 1.5 to 2 hours; heating up to 185 to 190°C in 2 hours, and the temperature is kept constant for 1.5 hours; continue heating to 220 to 240°C, Then the desired product can be obtained by natural cooling. Sample number A.

Embodiment 2

[0025] 300g (parts by mass is 14.5%) 12 hydroxystearic acid, 61g (parts by mass is 2.9%) salicylic acid, and 80g (parts by mass is 3.9%) calcium alkyl benzenesulfonate with high base value are added to 1600g (77.3% by mass) base oil, mix and heat to 60~90℃, add 28g (1.4% by mass) boric acid and 63.5g monohydrate lithium hydroxide saponification compound for 1.5~2 hours; use 2 hours to heat up When it reaches 185~190℃, the temperature is kept constant for 1.5 hours; continue to heat up to 220~240℃, and then naturally cool down to obtain the desired product. Sample number B. From the analysis data in Table 1, it can be seen that the bearing life of sample B is significantly longer than that of sample A and traditional lithium complex base grease after adding calcium alkyl benzene sulfonate with high base value. The roller test shows that sample A and traditional The lithium complex base grease is completely emulsified in contact with water, and the micro cones soften about 30, w...

Embodiment 3

[0027] 300g (parts by mass is 14.5%) 12 hydroxystearic acid, 61g (parts by mass is 2.9%) salicylic acid, and 80g (parts by mass is 3.9%) calcium alkyl benzenesulfonate with high base value are added to 1600g (77.3% by mass) base oil, mix and heat to 60~90℃, add 28g (1.4% by mass) boric acid, 63.5g lithium hydroxide monohydrate and 18.6g calcium hydroxide saponification compound 1.5~2 Hours; It takes 2 hours to heat up to 185~190℃, the temperature is kept constant for 1.5 hours; continue to heat up to 220~240℃, and then naturally cool down to obtain the desired product. Sample number C. After adding calcium hydroxide on the basis of the formulation process of sample B, it can be seen from Table 1 that the drop point of the prepared sample is greatly improved, while other bearing life and drum test performance have little change.

[0028] (The molar amount of 12 hydroxystearic acid: the molar amount of salicylic acid: the molar amount of boric acid = 1:0.44:0.45; lithium hydroxide...

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Abstract

The invention provides a high-temperature water-resistance long-service-life composite lithium calcium base lubricating grease and a preparation method. A thickening agent consists of 12-hydroxy stearic acid, boracic acid, salicylic acid and reactants of lithium hydroxide and calcium hydroxide, and additives comprise high-alkaline-value calcium alkyl benzene sulfonate and thiadiazole derivatives as extreme pressure agents and anti-rust agents. The 12-hydroxy stearic acid, the salicylic acid and the high-alkaline-value calcium alkyl benzene sulfonate are added into basic oil, the lithium hydroxide monohydrate of the boracic acid and the calcium hydroxide are added for carrying out saponification composition, the extreme pressure agents of thiadiazole derivatives and the anti-rust agents are sequentially added, and products are obtained after the post treatment. Because of the adoption of the proper raw material mixing ratio, the lubricating grease has good high-temperature performance,the drop point is higher than 280 DEG C, and the high-temperature long-service-life lubricating effect is reached. Simultaneously, the water-resistance capability and the extreme pressure wear resistance capability of the lubricating grease are obviously improved. The cooperative effect of the composite additives is sufficiently realized, so the high-temperature water-resistance long-service-lifecomposite lithium calcium base lubricating grease can meet the requirements of lubricating positions with the severe requirements on high and lower temperature performance, wear resistance extreme pressure performance, water resistance, mechanical stability and the like of the lubricating grease.

Description

Technical field [0001] The invention belongs to the technical field of lubricating grease, and particularly relates to a high-temperature, water-resistant and long-life lubricating grease and a preparation method thereof. Background technique [0002] Grease is a kind of lubricant often used in the lubrication of machinery and equipment, and it occupies a very important position in industrial production applications. Lithium complex grease came out in 1962 and has developed into a very important type of grease now, and the proportion of annual output is increasing year by year. Traditional domestic lithium complex greases mainly contain at least one C such as sebacic acid and azelaic acid 4 ~C 18 Dibasic organic acids and C 12 ~C 24 The monobasic organic acid compound, this kind of grease has a higher dropping point generally greater than 260 ℃, but the CRC test under the high temperature condition of 160 ℃ shows that the high temperature life of this type of grease is not superi...

Claims

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Application Information

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IPC IPC(8): C10M169/06C10M177/00C10N50/10C10N30/06
Inventor 李勇刘庆廉吴宝杰高艳青马爱民刘志颖莫林和董禄虎
Owner CHINA PETROLEUM & CHEM CORP
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