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Method for synthesizing ester lubricating oil by using molybdenum disulfide nanoparticles for catalysis and lubrication

A technology of molybdenum disulfide and nanoparticles, applied in the direction of molybdenum sulfide, lubricating compositions, chemical instruments and methods, etc., can solve the problems of difficult dispersion of molybdenum disulfide nanoparticles, high manufacturing cost, complicated reaction steps, etc., and achieve good economical Benefits and environmental protection value, improved lubrication performance, simple operation

Active Publication Date: 2019-06-21
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Molybdenum disulfide is an important solid lubricant additive. Molybdenum disulfide nanoparticles generally have better performance than micron-sized particles, but the problem of difficult dispersion of molybdenum disulfide nanoparticles in lubricating oil limits industrial applications.
These preparation methods all have the disadvantages of high manufacturing cost and complicated reaction steps.

Method used

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  • Method for synthesizing ester lubricating oil by using molybdenum disulfide nanoparticles for catalysis and lubrication
  • Method for synthesizing ester lubricating oil by using molybdenum disulfide nanoparticles for catalysis and lubrication
  • Method for synthesizing ester lubricating oil by using molybdenum disulfide nanoparticles for catalysis and lubrication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] ① Preparation of molybdenum disulfide nanoparticles

[0025] Weigh 1.5g of ammonium dodecamolybdenum phosphopolyacid, dissolve in 50g, 12% potassium hydroxide solution, fully mix 3g of thioacetamide and the above solution under heating and stirring, and then use 5.5mol / L hydrochloric acid to adjust the pH value to 4. After the reaction, the obtained precipitated product was washed, filtered and dried to obtain molybdenum disulfide nanoparticles.

[0026] figure 1 , 2 They are the XRD pattern and scanning electron microscope pattern of the product obtained by reacting molybdenum disulfide with ammonium dodecamolybdenum phosphopolyacid and thioacetamide in Example 1, respectively. figure 1 Among the main diffraction peaks, there are 4 can be attributed to (002), (100), (103), (110) of molybdenum disulfide particles, indicating that molybdenum disulfide has been successfully prepared. figure 2 It is shown that the molybdenum disulfide is granular, and the average size ...

Embodiment 2

[0031] ① Preparation of molybdenum disulfide nanoparticles

[0032] Weigh 1.5g of ammonium dodecamolybdenum phosphopolyacid, dissolve in 75g, 10% potassium hydroxide solution, fully mix 3.75g of thioacetamide and the above solution under heating and stirring, and then use 4mol / L Phosphoric acid was used to adjust the pH value to 3. After the reaction, the precipitated product obtained was washed, filtered and dried to obtain molybdenum disulfide nanoparticles.

[0033] ② Synthesis of ester lubricating oil

[0034] Take a total of 100g of polyethylene glycol and oleic acid as raw materials, wherein the molar ratio of alcohol to acid is 1:2, add 10g of molybdenum disulfide nanoparticles to the raw material mixture, and use the surface active center of molybdenum disulfide nanoparticles as a catalyst. The esterification reaction was carried out under the condition of stirring at 150°C for 6 hours, and the water generated was removed by a water separator. Because the raw material...

Embodiment 3

[0036] ① Preparation of molybdenum disulfide nanoparticles

[0037] Weigh 1.5g of ammonium dodecamolybdenum phosphopolyacid, dissolve in 37.5g, 15% potassium hydroxide solution, fully mix 2.25g of thioacetamide and the above solution under heating and stirring, then use 7mol / L of hydrochloric acid to adjust the pH value to 3.5. After the reaction, the obtained precipitated product was washed, filtered and dried to obtain molybdenum disulfide nanoparticles.

[0038] ② Synthesis of ester lubricating oil

[0039]Take a total of 100g of raw materials octanol and sebacic acid, wherein the molar ratio of alcohol to acid is 2:1, add 1g of molybdenum disulfide nanoparticles to the raw material mixture, use the surface active center of molybdenum disulfide nanoparticles as a catalyst, and stir Carry out the esterification reaction at 100°C for 15 hours, and use a water separator to remove the generated water. Because the raw material is reacted on the surface of the catalyst, the sol...

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Abstract

The invention discloses a method for synthesizing ester lubricating oil by using molybdenum disulfide nanoparticles for catalysis and lubrication, and relates to the technical field of solid catalysts, lubricating additives, ester oil synthesis and lubrication modification. Molybdenum disulfide nanoparticles are mixed with alcohol and acid, the surface active centers of the nanoparticles are usedas a catalyst to carry out esterification reaction, the raw materials are reacted on the surface of the catalyst, the solid catalyst particles can be well combined with a product ester after catalysisis finished to form a stable dispersion system, the molybdenum disulfide nanoparticles do not need to be separated, and the molybdenum disulfide nanoparticles can be directly used as a lubricant in synthesized ester lubricating oil. The molybdenum disulfide nanoparticles firstly have the activity of catalyzing esterification reaction, and then have excellent lubricating performance. After the reaction is finished, the surface of the catalyst can be fully wrapped by the product ester, the dispersion condition of the molybdenum disulfide nanoparticles can be obviously improved, and it ensures that the particles can be well dispersed in an oil product so as to improve the lubricating performance of the oil product.

Description

technical field [0001] The invention relates to the technical fields of solid catalyst, lubricating additive, ester oil synthesis and lubricating modification, in particular to a method for synthesizing ester lubricating oil using molybdenum disulfide nanoparticles for catalysis and lubricating functions. Background technique [0002] Molybdenum disulfide is an important solid lubricant additive. Molybdenum disulfide nanoparticles generally have better performance than micron-sized particles, but the problem of difficult dispersion of molybdenum disulfide nanoparticles in lubricating oil limits industrial applications. With the increasing shortage of petroleum resources and the refractory biodegradability of mineral oils, mineral base oils are gradually being replaced by synthetic lubricating base oils such as ester oils. The synthesis of ester oil is generally carried out through the esterification reaction of acid and alcohol. The reaction requires a catalyst. The catalyst...

Claims

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Application Information

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IPC IPC(8): C10M125/22C10M177/00C01G39/06B82Y40/00C07C67/08C07C69/50C08G65/332C10N30/06
Inventor 胡坤宏石永杰原治坤胡恩柱王磊
Owner HEFEI UNIV
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