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Engine lubricating oil and preparation method thereof

A technology for lubricating oil and engine, applied in the field of lubricating oil, can solve the problem of oxidation resistance, high temperature resistance, wear resistance, poor sealing performance, oil cleanliness, dispersibility and wear resistance damage, piston ring and cylinder liner corrosion and other problems, to achieve the effect of reducing friction coefficient, good high temperature deposit formation, and prolonging service life

Inactive Publication Date: 2021-06-29
雅士盾(天津)石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lubricating oil is affected by factors such as operating temperature, metal catalysis, combustion products and blow-by gas during use, and gradually loses its antioxidant activity and is prone to oxidative deterioration; resulting in detergency, dispersibility and wear resistance of the oil. Destruction, increased viscosity, increased acid products, formation of varnish and deposits, harmful to engine components
Due to the poor oxidation resistance, high temperature resistance, wear resistance and sealing performance of the existing engine lubricating oil, the wear of the engine is aggravated, the corrosion of the piston ring and the cylinder liner is serious, the filter screen is blocked, and the oil change period is shortened

Method used

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  • Engine lubricating oil and preparation method thereof
  • Engine lubricating oil and preparation method thereof
  • Engine lubricating oil and preparation method thereof

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preparation example Construction

[0048] The present invention also provides a kind of preparation method of described engine lubricating oil, comprises the following steps:

[0049] 1) mixing base oil, antioxidant and pour point depressant to obtain the first mixture;

[0050] 2) mixing the first mixture, the friction modifier, the viscosity index modifier and the ashless dispersant to obtain a second mixture;

[0051] 3) Mixing the second mixture, the defoamer and the metal detergent to obtain the engine lubricating oil.

[0052] The mixing temperature in step 1) of the present invention is preferably 40-50°C, more preferably 42-47°C, more preferably 44-45°C; the mixing time is preferably 1-2h, more preferably 1.5h; Step 2) the mixing temperature is preferably 45-55°C, more preferably 48-52°C, more preferably 50°C; the mixing time is preferably 0.5-1.5h, more preferably 1h; step 3) The mixing temperature is preferably 60-70°C, more preferably 63-68°C, more preferably 65-66°C; the mixing time is preferably ...

Embodiment 1

[0057] 75kg base oil (in the base oil, PAO6, PAO10 and pentaerythritol ester are 30kg, 35kg, 10kg respectively), 0.3kg n-butyl, 2-ethylhexyl zinc dithiophosphate, 0.2kg n-butyl, 4-ethyl Add 2-hexyl zinc dithiophosphate and 0.03kg polyalphaolefin into the reaction kettle, and mix for 2 hours at 40°C and 1000r / min. Then add 5kg molybdenum dialkyldithiophosphate, 0.3kg polymethacrylate, 3kg polyisobutylene monosuccinimide, 3kg polyisobutylene bisuccinimide (polyisobutylene monosuccinimide and polyisobutylene monosuccinimide) The number-average molecular weight of the polyisobutylene part of isobutylene bis-succinimide is 1500), and mixed at 45°C and 1000r / min for 1.5h. Finally, 0.03 kg of silicone oil and 3 kg of sulfurized calcium alkylphenate were added and mixed for 1 hour at 60° C. at a speed of 1000 r / min to obtain engine lubricating oil.

[0058] The engine lubricating oil of Example 1 has a phosphorus content of 0.075wt%, a sulfur content of 0.25wt%, a sulfate ash content...

Embodiment 2

[0060] 90kg base oil (in the base oil, PAO6, PAO10 and pentaerythritol ester are 35kg, 40kg, 15kg respectively), 2kg tert-butyl diphenylamine, 2kg2,2'-thiobis[3-(3,5-di-tert-butyl Base-4-hydroxyphenyl) ethyl propionate] and 3kg polymethacrylate were added into the reaction kettle, and mixed at 50°C and 2000r / min for 1h. Then add 4kg molybdenum xanthate, 4kg molybdate, 13kg styrene-isoprene copolymer, 9kg polyisobutylene bis-succinimide (the number average molecular weight of the polyisobutylene part is 4000), at 55 ℃, 2000r / min speed of mixing for 0.5h. Finally, 0.8 kg of polydimethylsiloxane, 2.5 kg of overbased magnesium sulfonate and 2.5 kg of overbased magnesium sulfonate were added, and mixed for 0.5 h at 70° C. at a speed of 2000 r / min to obtain engine lubricating oil.

[0061] The engine lubricating oil of Example 2 has a phosphorus content of 0.07wt%, a sulfur content of 0.2wt%, a sulfate ash content of 0.75wt%, a nitrogen content of 0.08wt%, and a base value of 9.5m...

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Abstract

The invention belongs to the technical field of lubricating oil. The invention provides engine lubricating oil. The engine lubricating oil comprises the following components in parts by weight: 75-90 parts of base oil; 0.5-4 parts of an antioxidant; 5-8 parts of a friction modifier; 0.3-13 parts of a viscosity index modifier; 0.03-3 parts of a pour point depressant; 0.03-0.8 part of a defoaming agent; 3-5 parts of a metal detergent; and 6-9 parts of an ashless dispersant. The invention also provides a preparation method of the engine lubricating oil. The lubricating oil disclosed by the invention is high in flash point and initial oxidation temperature, long in oxidation induction period and outstanding in high-temperature resistance and oxidation resistance; the pour point is low and the volatility is small; carbon deposit is not easy to generate at high temperature, and good capability of inhibiting generation of high-temperature sediments is achieved; the friction coefficient and the wear scar diameter are remarkably reduced, and excellent corrosion resistance and rust resistance are achieved; the service life of equipment is prolonged; the noise is low; fuel is saved, emission is reduced, and pollution is small.

Description

technical field [0001] The invention relates to the technical field of lubricating oil, in particular to an engine lubricating oil and a preparation method thereof. Background technique [0002] The engine is the heart of automobiles and many industrial equipments, and its lubricating oil consumption accounts for about 50% of the total lubricating oil. It is the most concerned type of lubricating oil industry and the fastest replacement type. Engine lubricating oil is the blood of the engine. Its performance directly affects the power, safety and reliability of the engine. functional liquid. [0003] As the manufacture of engines becomes more and more sophisticated, the requirements for the performance of lubricating oils such as oxidation resistance, sealing, high temperature resistance, piston cleaning, and wear resistance are getting higher and higher. The oxidation stability of engine lubricating oil is an extremely important control index. Lubricating oil is affected...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N30/06C10N30/12
CPCC10M169/048C10M2223/045C10M2215/064C10M2219/024C10M2219/068C10M2227/08C10M2201/087C10M2209/084C10M2205/04C10M2205/06C10M2205/024C10M2205/022C10M2203/06C10M2229/041C10M2219/046C10M2219/02C10M2217/024C10M2229/00
Inventor 唐滔
Owner 雅士盾(天津)石油科技有限公司
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