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Lubricant dispersant

A lubricating oil dispersant and glycerin technology, applied in lubricating compositions, additives, petroleum industry, etc., can solve the problems of black sludge dispersion and poor adsorption, achieve effective adsorption and control, good peptization and dispersion, and reduce the impact Effect

Inactive Publication Date: 2012-07-04
河北鑫达能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the succinimide dispersant commonly used in lubricating oils is not good at dispersing and adsorbing black sludge, this product provides a good sludge and paint film control ability, excellent soot dispersing ability lubricating oil dispersant

Method used

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  • Lubricant dispersant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Add 26.7g (about 0.12mol) phosphorus pentasulfide, 0.9g sulfur powder and 2000g toluene to 420g (number average molecular weight about 4200, about 0.1mol) polyisobutylene, heat up to 120-150°C, reflux for 6 hours;

[0014] (2) Maintain the above reaction solution at 170~180℃, bubbling with 100℃ water vapor for 10 hours, and cool to 50~60℃ to obtain about 500g solution, and then use 700g absolute ethanol at 50~60℃ to extract 6 Hours, remove the upper liquid layer by layer;

[0015] (3) Add 9.2g (about 0.1mol) of glycerol and 31.8g (about 0.3mol) of xylene to the lower layer liquid obtained in step (2), heat to 160~180℃, reflux for 4 hours, and distill off the xylene to obtain The lubricant dispersant A of the present invention.

Embodiment 2

[0017] (1) Add 22.2g (about 0.1mol) phosphorus pentasulfide, 0.74g sulfur powder and 1500g toluene to 350g (number average molecular weight about 3500, about 0.1mol) polyisobutylene, heat up to 120~150℃, reflux for 6 hours, and steam Toluene

[0018] (2) Maintain the above reaction solution at 170~180℃, bubbling with 100℃ water vapor for 10 hours, and cool to 50~60℃ to obtain about 420g solution, and then use 500g absolute ethanol at 50~60℃ to extract 6 Hours, remove the upper liquid layer by layer;

[0019] (3) Add 11g (about 0.12mol) of glycerin and 31.8g (about 0.3mol) of xylene to the lower liquid obtained in step (2), heat to 160~180℃ and reflux for 4 hours, and distill off the xylene to obtain the product Invented lubricant dispersant B.

Embodiment 3

[0021] (1) Add 0.45g sulfur powder and 1200g toluene to 215g (number average molecular weight about 2150, about 0.1mol) polyisobutylene and 17.8g (about 0.08mol) phosphorus pentasulfide, heat up to 120~150℃, reflux for 6 hours;

[0022] (2) Maintain the above reaction solution at 170~180℃, bubbling with 100℃ water vapor for 10 hours, and cool to 50~60℃ to obtain about 280g solution, and then use 350g absolute ethanol to extract 6 at 50~60℃. Hours, remove the upper liquid layer by layer;

[0023] (3) Add 13.8g (about 0.15mol) of glycerin and 31.8g (about 0.3mol) of xylene to the lower layer liquid obtained in step (2), heat to 160~180℃, reflux for 4 hours, and distill off the xylene to obtain Lubricating oil dispersant C of the present invention.

[0024] Lubricating oil will accelerate oxidation when it is used under heating. The result of oxidation is the formation of deposits on the reactor wall. The deposits are mainly carbon deposits. The deposition amount M per unit volume of f...

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Abstract

The invention discloses a lubricant dispersant. The preparation method of the lubricant dispersant comprises the following steps: firstly adding phosphorus pentasulfide, sulfur powder and toluene in polyisobutylene, heating and refluxing to perform a reaction for 5-8 hours and evaporate toluene, then maintaining the above reaction solution to 170-180 DEG C to bubble with steam for 10 hours, cooling to 50-60 DEG C, then extracting with absolute ethanol for layering, removing the liquid on the upper layer, then adding glycerin and xylene, heating and refluxing to perform a reaction for 4 hours,and evaporating to remove xylene and obtain the finished product. The lubricant dispersant of the invention has good heat resistance, strong solubilization to the initial oxidation product of the liquid lubricant and good peptization and dispersion functions to solid particles such as carbon deposit and fly ash; and can reduce the influence on the low temperature viscosity of the lubricant so that the low temperature viscosity of the lubricant is low and can effectively absorb the black oil sludge and paint film and control the dispersion of black oil sludge.

Description

Technical field [0001] The invention relates to a lubricating oil dispersant for internal combustion engines. Background technique [0002] During the operation of the internal combustion engine, a lot of paint film, sludge and carbon deposits may be formed, causing blockage of the oil circuit and filter screen, wear of the piston, and adhesion of the piston ring. Moreover, because the sludge contains a lot of water, the internal combustion engine is easily rusted. Shorten the service life of the internal combustion engine. In order to solve the above problems, people widely use the method of adding a dispersant to the lubricating oil. The function of the dispersant is to disperse the precursors of sludge, paint film and carbon deposits in the oil to prevent them from forming sludge, paint film and carbon deposits. Extend the oil change period, thereby extending the service life of the internal combustion engine. Succinimide-type ashless dispersants are mainly used in the formu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M153/02C10N30/04C10N40/25
Inventor 张成如
Owner 河北鑫达能源股份有限公司
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