Composite lithium base lubricant and its preparing method

A technology of complex lithium base and grease, applied in lubricating compositions, base materials, petroleum industry, etc., can solve the problem of compound use of complex lithium base grease and overbased calcium sulfonate that has not been found, and achieve good mechanical properties. The effect of stability

Active Publication Date: 2005-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Afterwards, many patents have improved the performance of calcium sulfonate grease. For example, CN1414076...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 400g of overbasic calcium sulfonate with a base value of 280mgKOH / g to 200g of 500SN mineral oil, heat to 80-95°C, add 38.5g of water and 5.4g of acetic acid, and wait until the material thickens, use a Fourier transform infrared spectrometer Tested at 881-886cm -1 There is an absorption peak of calcite-type calcium carbonate, add 150g of 500SN mineral oil, add 37.5g of 12 hydroxystearic acid and 12.5g of sebacic acid, slowly add 10.8g of lithium hydroxide aqueous solution dropwise at 90-100°C, After saponification and dehydration, heat up to 200°C, add 160g of 500SN mineral oil, stir evenly, cool to room temperature, and grind evenly. The physical and chemical performance analysis results of the lubricating grease are shown in Table 1.

Embodiment 2

[0033] Add 300g of overbasic calcium sulfonate with a base value of 300mgKOH / g to 180g of 500SN mineral oil, heat to 80-95°C, add 40g of water and 6g of ethanol, and wait for the material to thicken, then test it with a Fourier transform infrared spectrometer. at 881-886cm -1 There is an absorption peak of calcite-type calcium carbonate, add 150g of 750ZN mineral oil, add 54.4g of stearic acid and 27.2g of adipic acid, slowly add 20.9g of lithium hydroxide aqueous solution dropwise at 90-100°C, saponification and dehydration Finally, heat up to 210°C, add 200g of 150BS mineral oil, stir evenly, cool to room temperature, and grind evenly. The physical and chemical performance analysis results of the lubricating grease are shown in Table 1.

Embodiment 3

[0035] Add 280g of overbased calcium sulfonate with a base value of 280mgKOH / g to 200g of polyalphaolefin oil, heat to 80-95°C, add 50g of water, 11.2g of acetic acid and 14.3g of ethylene glycol monomethyl ether, and wait The material becomes thicker, tested with a Fourier transform infrared spectrometer, at 881-886cm -1 There is an absorption peak of calcite-type calcium carbonate, add 90g of polyalphaolefin oil, add 42.6g of 12-hydroxystearic acid and 20.6g of azelaic acid, slowly add 21.8g of lithium hydroxide aqueous solution dropwise at 90-100°C After saponification and dehydration, heat up to 200°C, add 200g of 500SN mineral oil, stir evenly, cool to room temperature, and grind evenly. The physical and chemical performance analysis results of the lubricating grease are shown in Table 1.

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Abstract

The composite lithium-base lubricating grease consists of the following components: high alkality calcium sulfonate with calcium carbonate existing in calcite crystal and dispersed colloid particle form in 20-60 wt%; thickener comprising composite lithium soap in 3-15 wt%; and lubricating base oil in the rest amount. The preparation process of the lubricating grease includes mixing and heating Newtonian fluid high alkality calcium sulfonate, converting agent and base oil until thickening; adding C12-C24 fatty acid and auxiliary acid and producing saponification with lithium hydroxide aqua; heating to dewater and cooling to form grease. The composite lithium-base lubricating grease of the present invention has excellent mechanical stability, colloid stability, water resistance, rust resistance and high temperature use performance.

Description

technical field [0001] The invention relates to a lubricant, in particular to a lithium complex grease and a preparation method thereof. Background technique [0002] Grease is a lubricant that is often used in the lubrication of mechanical equipment and plays an important role in industrial production applications. Lithium-complex grease came out in 1962, and it has become a very important type of lubricating grease, and the proportion of annual output is increasing year by year. The thickener of lithium complex grease is formed by the co-crystallization of high-molecular fatty acid lithium soap and low-molecular acid lithium salt. However, the performance of the base grease often cannot meet the actual needs, so there are a large number of documents and patents discussing the addition of other compounds or various An additive to improve the performance of lithium complex grease. [0003] The complex lithium-based grease mentioned in Chinese patent CN1055384A is composed ...

Claims

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Application Information

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IPC IPC(8): C10M105/32
Inventor 刘显秋李茂森王平
Owner CHINA PETROLEUM & CHEM CORP
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