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Precursor of nano soap base thickener for grease and its preparation method and application

A thickening agent and precursor technology, applied in thickeners, lubricating compositions, petroleum industry, etc., can solve the problems of unstable product quality, easy formation of soap particles, increased energy consumption, etc., to avoid equipment renovation and investment , The effect of shortening the saponification reaction time and improving the reactivity

Active Publication Date: 2022-05-10
湖南华能新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the production process of the above-mentioned documents, several key problems have been highlighted: due to the Ca(OH)2 solid particles of calcium-based grease Slightly soluble in water, and its solubility decreases with the rise of temperature, so water needs to be added to participate in the saponification reaction; in the saponification reaction, undissolved calcium hydroxide solids cannot participate in the reaction, and soap particles are easily formed, making filtration difficult; on the other hand, calcium hydroxide is in In base oils, the saponification reaction with fatty acids needs to be carried out at a temperature above 100°C, and acid-base neutralization is an exothermic reaction, and the water generated in the reaction vaporizes, causing tank swelling; at the same time, in order to prevent the formation of soap particles, a large amount of water needs to be added. Difficulty in pressure relief and soap running out; the drainage process also increases energy consumption and prolongs working hours; in addition, due to water in the product or unclean drainage, the lubricating grease is often soft or not fattening
[0008] There is a common step in the production process of the above-mentioned documents, that is, water must be added in the production process, and the problems such as unstable product quality and increased energy consumption caused by adding water have not been well resolved.
However, the use of nano-materials to participate in the saponification of thickeners, which are the main components of grease, has hardly been reported.

Method used

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  • Precursor of nano soap base thickener for grease and its preparation method and application
  • Precursor of nano soap base thickener for grease and its preparation method and application
  • Precursor of nano soap base thickener for grease and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Prepare 680 grams of base oil (SN500), 300 grams of commercially available high-purity calcium hydroxide powder, 9 grams of oleic acid, and 11 grams of 12-hydroxystearic acid.

[0053] After mixing 600 grams of base oil and calcium hydroxide powder evenly with a high-speed shear emulsifier, add oleic acid and continue high-speed stirring for 0.5 hr, and the temperature of the system rises slightly. Stop high-speed stirring, transfer the oil phase suspension to a planetary ball mill, coarsely grind for 2 hours, and then finely grind for 2 hours. For fine grinding, choose 0.2mm zirconium beads, and the filling factor is 60%. The modified calcium hydroxide dispersion is taken out and transferred to a kettle equipped with a high-speed shear emulsifier, and then the mixed solution of 80 grams of base oil and 12-hydroxystearic acid preheated to 85 ° C is placed in the emulsifier at a high speed. Put it into the kettle under the condition of running, and continue to emulsify a...

Embodiment 2

[0055] Prepare 680 grams of base oil (SN500), 300 grams of commercially available high-purity calcium hydroxide powder, 11 grams of 12-hydroxystearic acid, 9 grams of benzenesulfonic acid, and 700 grams of cyclohexane.

[0056] 300 grams of calcium hydroxide powder, 700 g of cyclohexane and 9 grams of benzenesulfonic acid are ball milled in a planetary ball mill for 2.0hr (the ball mill selects 0.2mm zirconium beads, and the filling factor is 60%), and then 600g of base oil is added to the mixed mixture after ball milling. Suspended system, rotary evaporation, steamed all cyclohexane. Then transfer the mixed system from which cyclohexane has been removed to a high-speed shear emulsifier for high-speed stirring. While stirring at high speed, add hydrogen to 91 g of the base oil and 12-hydroxystearic acid mixture that has been heated to 80 ° C and fully mixed. In the system of calcium oxide and base oil, continue stirring at high speed for 1.0 hr. The modified calcium hydroxide...

Embodiment 3

[0058] Prepare 580 grams of base oil (SN150), 400 grams of commercially available high-purity lithium hydroxide monohydrate, 20 grams of benzenesulfonic acid, and 700 grams of cyclohexane.

[0059] 400 grams of lithium hydroxide monohydrate, 700 g of cyclohexane and 20 grams of benzenesulfonic acid were ball milled in a planetary ball mill for 3.0 hr (the ball mill selected 0.2 mm zirconium beads, and the filling factor was 60%), and then 580 g of base oil was added to the ball milled mixture. Suspend the system, and rotate to evaporate to evaporate part of the crystallization water of all cyclohexane and lithium hydroxide. The modified lithium hydroxide dispersion is taken out, which is the lithium-containing soap-based thickener precursor. The thickener precursor has good stability, and there is no sedimentation at room temperature for 3 months. The content of lithium hydroxide in the thickener precursor is 35wt%, the particle size is about 300nm, and the particles are irre...

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Abstract

The invention belongs to the technical field of lubricating grease, and in particular relates to a nano-soap-based thickener precursor used for lubricating grease, a preparation method and application thereof. The nano-soap-based thickener precursor for grease is a dispersion composed of nano-metal hydroxide particles, surfactants and liquid solvents. The application of the nano-soap thickener precursor for grease is to prepare grease with fatty acid, nano-soap thickener precursor, base oil and additives. The nano-soap-based thickener precursor of the present invention participates in saponification during the preparation of grease, and achieves a good reaction effect, but does not change the current preparation process of grease at all, thus avoiding the production of grease production plants due to product upgrades. The required equipment modification and investment can also improve product performance.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, and in particular relates to a nano-soap-based thickener precursor used for lubricating grease and its preparation method and application. Background technique [0002] As an independent industrial part of lubricants, grease is widely used in industrial machinery, agricultural machinery, transportation industry, Electronic information industry and other fields. Grease is mainly made by thickening base oil with thickener and adding additives. According to the type of thickener used, it can be divided into metal soap-based grease, organic grease, hydrocarbon-based grease and inorganic grease. [0003] In recent years, global grease production has remained basically stable. In 2017, the global grease production was 1.167 million tons, and China's grease production accounted for 34.97% of the global production. According to statistics, the output of lithium-based grease in China reached...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M123/02C10N50/10C10N30/08C10N30/06
CPCC10M123/02C10M2201/0626C10M2207/1265C10M2207/1285C10M2219/0445
Inventor 沈志刚杨程黄斌
Owner 湖南华能新材料科技有限公司