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
View PDF9 Cites 0 Cited by
  • 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 disper

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Example Embodiment

[0023] Example 1

[0024] ①, preparation of molybdenum disulfide nanoparticles

[0025] Weigh 1.5g of ammonium dodecamolybdenum phosphatopolyacid, dissolve it 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 The pH value of the hydrochloric acid was adjusted 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 preparing molybdenum disulfide by reacting ammonium dodecamolybdenum phosphatopolyacid with thioacetamide in Example 1, respectively. figure 1 There are 4 main diffraction peaks in (002), (100), (103) and (110) which can be assigned to molybdenum disulfide particles, indicating that molybdenum disulfide has been successfully prepared. figure 2 The molybdenum disulfide is shown...

Example Embodiment

[0030] Example 2

[0031] ①, preparation of molybdenum disulfide nanoparticles

[0032] Weigh 1.5g of ammonium dodecamolybdenum phosphatopolyacid, 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 The pH value of the phosphoric acid is adjusted to 3. After the reaction, the obtained precipitated product is washed, filtered and dried to obtain molybdenum disulfide nanoparticles.

[0033] ②. Synthesis of ester lubricating oil

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

Example Embodiment

[0035] Example 3

[0036] ①, preparation of molybdenum disulfide nanoparticles

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

[0038] ②. Synthesis of ester lubricating oil

[0039]Take a total of 100 g of raw material octanol and sebacic acid, wherein the molar ratio of alcohol and acid is 2:1, add 1 g of molybdenum disulfide nanoparticles to the raw material mixture, and use the surface active center of the molybdenum disulfide nanoparticles as a catalyst. The esterification reaction is carried out under the heating condition of 100℃ for 15h, and the generated water is removed by a water separator. Since the raw ma...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap