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Rare earth oxysulfide taken as lubricating oil additive, and preparation method thereof

A technology of lubricating oil additives and rare earth oxides, applied in rare earth metal compounds, additives, lubricating compositions, etc., can solve the problems of unsatisfactory anti-wear effect, easy chemical reaction of compounds, destruction of lubricating effect, etc., to improve lubricating friction Environment, both antioxidant capacity and lubricity, good overall performance

Active Publication Date: 2019-09-06
NANYANG NORMAL UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a rare earth oxysulfide used as a lubricating oil additive and its preparation method to solve the problems that the existing lubricating oil additives have unsatisfactory anti-friction effects, or the compounds are prone to chemical reactions and damage the lubricating effect

Method used

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  • Rare earth oxysulfide taken as lubricating oil additive, and preparation method thereof
  • Rare earth oxysulfide taken as lubricating oil additive, and preparation method thereof
  • Rare earth oxysulfide taken as lubricating oil additive, and preparation method thereof

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preparation example Construction

[0039] The present invention provides a method for preparing rare earth oxysulfides used as lubricating oil additives. The rare earth oxysulfides have the general formula Ln 2 o 2 S, wherein Ln is a rare earth element, specifically one of La, Ce, Pr, Nd, Gd, Yb, Y and Eu, and the preparation method of rare earth oxysulfide comprises the following steps:

[0040] (1) Weigh the raw material rare earth oxide Ln 2 o 3 Put it into a ball mill, then add the first organic solvent to obtain the first mixture, perform ball milling on the first mixture, and obtain the first slurry after the ball milling is completed; weigh the raw material rare earth sulfide Ln 2 S 3 adding to the first slurry to obtain a second mixture, and performing ball milling on the second mixture to obtain a second slurry;

[0041] In a specific embodiment of the present invention, the rare earth oxide Ln 2 o 3 and rare earth sulfide Ln 2 S 3 The molar ratio is 2:1.

[0042] In a specific embodiment of t...

Embodiment 1

[0060] The preparation method of a rare earth oxysulfide as a lubricating oil additive provided in this embodiment comprises the following steps:

[0061] Weigh 6.52g La 2 o 3 Put the coarse particles into the stainless steel ball mill jar, then weigh 50g of stainless steel balls into the ball mill jar, add 150mL of absolute ethanol, then seal the ball mill jar with a sealing gasket and fix it on the planetary ball mill, set the ball mill parameters: speed 2400r / min, ball mill 72h, adjust the direction of forward and reverse every 10 minutes. After ball milling, weigh 3.74g La 2 S 3 Add it into the slurry formed by the above mixture, then set the rotation speed at 300r / min, and ball mill for 3h.

[0062] After ball milling, transfer the above slurry and steel balls to a constant temperature oil bath, set the temperature at 80°C, complete the volatilization of anhydrous ethanol through slow stirring, and then sieve the obtained solid mixture to obtain the initial mixture. ...

Embodiment 2

[0072] The difference between this embodiment and embodiment 1 is that the rare earth oxide La 2 o 3 After ball milling, weigh 3.74g La 2 S 3 and 0.156g Na 2 S was added to the slurry formed by the mixture after rare earth oxide ball milling, and the temperature was raised to 700° C. in a vacuum tube furnace, and the temperature was kept for 2 hours. The other steps were the same as those in Example 1 and will not be repeated here.

[0073] The surface-modified rare earth oxysulfide La prepared in this example 2 o 2 S carried out the same friction test as in Example 1, and after the anti-wear and anti-friction performance test, the surface-modified rare earth oxysulfide La prepared in this example was obtained. 2 o 2 S is used as a lubricating oil additive, and the friction coefficient and wear amount are shown in Table 1 below.

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Abstract

The invention provides a rare earth oxysulfide taken as a lubricating oil additive, and a preparation method thereof. The rare earth oxysulfide comprises a general formula Ln2O2S, wherein Ln is used for representing a rare earth element. The preparation method comprises following steps: 1, rare earth oxide Ln2O3 is weighed, and is introduced into a ball milling machine for ball milling, after ballmilling, rare earth sulfide Ln2S3 is weighed, and is added for continuous ball milling; 2, a slurry obtained in step is heated until complete evaporation of an organic solvent is realized, and sieving is carried out so as to obtain an initial mixture; 3, the initial mixture is introduced into a sintering furnace for sintering, and then grinding and sieving are carried out so as to obtain a singlephase rare earth oxysulfide Ln2O2S; and 4, the single phase rare earth oxysulfide Ln2O2S is added into an organic solvent, a surfactant is added, centrifugation, washing, and drying are carried out so as to obtain the rare earth oxysulfide taken as a lubricating oil additive. The Ln2O2S is convenient to prepare; bath production can be realized; the product is suitable for high temperature friction environment; and the friction coefficient is low.

Description

technical field [0001] The invention belongs to the field of lubricating oil additives, and in particular relates to a rare earth oxysulfide used as a lubricating oil additive and a preparation method thereof. Background technique [0002] Lubricating oils are used in automotive engines, transmissions, bearings, gears, industrial gears and other machinery to reduce friction and wear and improve fuel economy. Many components, including, but not limited to, dispersants, detergents, friction modifiers, antiwear agents, antioxidants, and anticorrosion agents are typically present in well formulated lubricating oils. [0003] During the use of lubricating oil, due to the movement of the friction surface or changes in environmental factors, such as temperature, pressure, etc., the physical properties of the liquid are greatly affected, and it is difficult to maintain the carrying capacity of the liquid film on the friction surface, thus making the rough surface slightly convex Bo...

Claims

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Application Information

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IPC IPC(8): C01F17/00C10M125/22C10N30/06C10N30/08C10N30/10
CPCC10M125/22C10M2201/065C10M2201/14C10N2030/10C10N2030/08C10N2030/06C01F17/294
Inventor 李良马世榜杜志豪张聪正刘任峰左研
Owner NANYANG NORMAL UNIV
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