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Composition of four-component lithium complex grease and preparation method thereof

A technology of base grease and lithium complex, applied in the field of grease, can solve the problems of poor bearing life, poor adhesion and high bearing life, and achieve excellent high temperature leakage prevention performance, high temperature leakage prevention and outstanding high temperature bearing life. Effect

Active Publication Date: 2013-03-06
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art refers to the lubricating grease compounded by lithium 12 hydroxystearate and two or three components of dibasic acid, boric acid, and salicylic acid. There are certain defects in bearing life and high temperature leakage resistance at 160°C. Some have high dropping points and high adhesion, but poor leakage resistance at high temperature 160°C; some have good high temperature leakage resistance but poor bearing life. High life, but poor adhesion; some high temperature 160 ℃ leakage resistance is good, but the bearing life is poor

Method used

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  • Composition of four-component lithium complex grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Add 500 grams of 12-hydroxystearic acid and 1900 grams of base oil 500SN into the reactor, heat to 80°C, put 31 grams of boric acid and 90 grams of lithium hydroxide into the alkali tank, dissolve it with 600 grams of water and heat to 80°C, put it into the reaction kettle, under the condition of 97°C, the reaction kettle is saponified and compounded in one step for 1.5 hours, and the saponified material is rapidly heated to 120°C, and the temperature is kept constant for half an hour. 69 grams of salicylic acid, stirred for 10 minutes, 121.5 grams of two-step alkali lithium hydroxide was dropped into an alkali tank and dissolved in 4 times of water to make an alkali solution, and the aqueous solution of the two-step alkali was added at 120° C. to carry out two-step saponification and compounding, adding After the lye is finished, the reaction kettle is heated slowly, and the temperature is kept at 134°C for one hour to ensure that the materials are fully mixed...

Embodiment 2

[0037] Example 2 Add 500 grams of 12-hydroxystearic acid and 1900 grams of base oil 500SN to the reactor, heat to 70°C, put 31 grams of boric acid and 90 grams of lithium hydroxide into the alkali tank, dissolve it with 600 grams of water and heat to 80°C, put it into the reaction kettle, under the condition of 97°C, the reaction kettle is saponified and compounded in one step for 1.5 hours, and the saponified material is rapidly heated to 120°C, and the temperature is kept constant for half an hour. 69 grams of salicylic acid, stirred for 20 minutes, 58 grams of the two-step alkali lithium hydroxide was dropped into the alkali tank and dissolved in 4 times of water to make an alkali solution, and the aqueous solution of the two-step alkali was added at 120 ° C to carry out two-step saponification and compounding. After the lye is finished, the temperature of the reaction kettle is raised slowly, and the temperature is kept at 134°C for one hour to ensure that the materials are...

Embodiment 3

[0051]Example 3 Add 500 grams of 12-hydroxystearic acid and 1900 grams of base oil 500SN into the reactor, heat to 90°C, put 31 grams of boric acid and 90 grams of lithium hydroxide into the alkali tank, dissolve and heat with 600 grams of water to 80°C, put it into the reaction kettle, and saponify and compound at 98°C for 1.5 hours. The saponified material is rapidly heated to 120°C, and the temperature is kept constant for half an hour. After the constant temperature is completed, 157 grams of azelaic acid and salicylic acid 69 grams of acid, stirred for 10 minutes, 96.5 grams of two-step alkali lithium hydroxide was put into the alkali tank and dissolved with 4 times of water to make an alkali solution. After the liquid, the reaction kettle is heated slowly, and kept at 131°C for one hour to ensure that the materials are fully mixed and dispersed to achieve the purpose of composite co-crystallization. It takes 3 hours to raise the temperature of the reaction kettle to 185°C...

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Abstract

The invention belongs to a composition of four-component lithium complex grease and a preparation method thereof. 12-lithium hydroxyl stearate, lithium azelaic acid or lithium sebacic acid, lithium boric acid and lithium salicylate are added into base oil. Four-component complex lithium prepared by controlling complex saponification temperature and time in a first step, alkali adding temperature in a second step, complex co-crystallization temperature and time and the highest temperature by a two-step saponification process has the advantages of high adhesion property, excellent high temperature leakage resistance, long high-temperature bearing service life, high comprehensive performance and capability of meeting the requirement of the lubricating of high-temperature environment equipment and high-temperature centralized pumping and lubricating. The lithium complex grease of the invention belongs to high-temperature grease of which the dropping point is not less than 260 DEG C and which has the prominent advantages of high adhesion property, excellent high temperature leakage resistance and long high-temperature bearing service life at the temperature of 160 DEG C. Compared with polyurea grease, the lithium complex grease cannot be hardened at a high temperature; and compared with the ordinary two-component or three-component complex lithium, the lithium complex grease has the advantages of high adhesion property, excellent high temperature leakage resistance and long high-temperature bearing service life.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, and relates to a composition and a preparation method of a four-component composite lithium-based lubricating grease. Background technique [0002] Compared with lithium-based grease, lithium-composite grease has the advantage of increasing the service temperature. It is applied to various fields of the national economy. The increase in service temperature of lithium-complex grease solves many problems in equipment maintenance and prolongs the life cycle of equipment maintenance in a certain sense. . It is widely used in high-temperature parts of steel mills, such as continuous casting equipment, elastic slideways of sintering machines, hot rolling mill bearings, and lubrication of heavy-duty automobile wheel bearings. In addition, it is also used in cement plants, ceramic plants, printing and dyeing plants, and glass plants. Lithium complex grease products are used on the equipment. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M123/02C10M177/00C10N50/10C10N40/02
Inventor 马爱民吴宝杰高艳青刘庆廉莫林和李勇谷校英董禄虎
Owner CHINA PETROLEUM & CHEM CORP
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