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Lithium-calcium complex lubricating grease composition and preparation method

A technology of complex calcium lubricating grease and composition, which is applied in the field of lubricating grease to achieve good mechanical stability and good water resistance

Inactive Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent No. CN101031181A has carried out a composite calcium-based grease made of long-chain molecular acids and different small molecular acids; the surface hardening phenomenon has been alleviated, but the surface hardening phenomenon still exists

Method used

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  • Lithium-calcium complex lubricating grease composition and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put 2200KG of 650SN base oil into the reaction kettle, add 170KG of lauryl hydroxystearic acid, heat to 90°C, add 31KG of lithium hydroxide (dissolved in hot water) after the material is fully dissolved, and react at a constant temperature of 95°C for 40 minutes; after the reaction is completed Add 70KG of calcium hydroxide, keep the temperature at 110-115°C and slowly add glacial acetic acid 85KG (99%) dropwise after stirring evenly. After the dropwise addition is completed, react at a constant temperature of 115°C for 60 minutes. After the reaction is completed, the temperature is raised, and the maximum temperature is controlled at 200-210°C , the maximum temperature is constant for 30Min, and after the constant temperature is completed, 1000KG of 650SN base oil is used for cooling in the reactor. After cooling, the temperature is controlled above 170°C, and the temperature is naturally lowered. 3KG, sulfurized isobutylene: 25KG. When the temperature is lowered to 40...

Embodiment 2

[0026] Add 1000KG of 650SN and 1000KG of 150BS base oil into the reactor, add 300g of dodecyl hydroxystearic acid, heat to 90°C, add 43.2KG of lithium hydroxide (dissolved in hot water) after the materials are fully dissolved, and react at a constant temperature of 95°C for 40 minutes; After the reaction was completed, 660KG (99%) of glacial acetic acid and 500KG of calcium hydroxide were added, and the reaction was carried out at a constant temperature of 105°C for 120 minutes; the temperature was raised after the reaction was completed. The maximum temperature is controlled at 200-210°C, and the maximum temperature is constant for 30Min; after the constant temperature is completed, use 300KG of 650SN base oil and 300KG of 150BS base oil to cool in the reactor. ℃ Add T501: 50KG, T705: 35KG, T706: 6KG. When the temperature is lowered to 40-60°C, it will be packed in cans after being oil-pressed three times by a three-roller machine.

Embodiment 3

[0028] Add 1000KG of 650SN and 1000KG of 150BS base oil into the reactor, add 300g of dodecyl hydroxystearic acid, heat to 90°C, add 43.2KG of lithium hydroxide (dissolved in hot water) after the materials are fully dissolved, and react at a constant temperature of 95°C for 40 minutes; After the reaction, add 760KG of salicylic acid and 250KG of calcium hydroxide, and react at a constant temperature of 100°C for 120 minutes. After the reaction, the temperature rises. The maximum temperature is controlled at 200-210°C. After cooling, the temperature is controlled above 170°C, and the temperature is naturally lowered to 60-90°C, adding T501: 120KG, T705: 200KG, T706: 140KG. When the temperature is lowered to 40-60°C, it will be packed in cans after being oil-pressed three times by a three-roller machine.

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Abstract

The invention relates to a lithium-calcium complex lubricating grease composition and a preparation method. The lubricating grease comprises the following components: (1) 60%-87% of base oil; (2) 10%-38% of a thickening agent; and (3) 1.5%-11% of an additive, wherein the thickening agent disclosed by the invention is a lithium-calcium complex thickening agent, comprises one or more long-chain fatty acid lithium soap and one or more micromolecular acid calcium soap, and is obtained from the reactants of acid and lithium hydroxide and calcium hydroxide. The lithium-calcium complex lubricating grease prepared by the method has good mechanical stability, colloid stability, water resistance and good extreme pressure antiwear property; and above all, the hardening phenomenon is not generated under room-temperature long-term storage and high-temperature (120 DEG C) conditions on the basis that excellent performances of the original lithium-calcium complex lubricating grease are reserved.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, and relates to a high-temperature extreme-pressure lubricating grease composition and a preparation method. Background technique [0002] Calcium complex grease has been produced and used for decades. This grease has good properties such as high dropping point, extreme pressure resistance and excellent water resistance, and has been widely used in the past for a long time. However, this lubricating grease itself has serious quality defects, namely storage and surface hardening under high temperature conditions. Due to the existence of this problem, there is a greater risk of quality problems for the manufacturer, and for the final customer, it will be very inconvenient to use. [0003] For a long time, people have been trying to solve this problem through various methods and approaches such as formula design and process tests. Although some tests have achieved certain results, they ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10M169/06C10M177/00C10N50/10C10N30/06
Inventor 谷校英栗志彬高艳青董禄虎李通
Owner CHINA PETROLEUM & CHEM CORP
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