CN113046159A - Engine lubricating oil and preparation method thereof - Google Patents
Engine lubricating oil and preparation method thereof Download PDFInfo
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- CN113046159A CN113046159A CN202110315623.8A CN202110315623A CN113046159A CN 113046159 A CN113046159 A CN 113046159A CN 202110315623 A CN202110315623 A CN 202110315623A CN 113046159 A CN113046159 A CN 113046159A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/048—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution, non-macromolecular and macromolecular compounds
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/087—Boron oxides, acids or salts
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/06—Well-defined aromatic compounds
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/022—Ethene
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/024—Propene
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/06—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/024—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an amido or imido group
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
- C10M2219/024—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of esters, e.g. fats
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/046—Overbasedsulfonic acid salts
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
- C10M2219/068—Thiocarbamate metal salts
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
- C10M2227/08—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions having metal-to-carbon bonds
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
- C10M2229/04—Siloxanes with specific structure
- C10M2229/041—Siloxanes with specific structure containing aliphatic substituents
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Abstract
The invention belongs to the technical field of lubricating oil. The invention provides engine lubricating oil which 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 pour point depressant; 0.03-0.8 part of defoaming agent; 3-5 parts of a metal detergent; 6-9 parts of an ashless dispersant. The invention also provides a preparation method of the engine lubricating oil. The lubricating oil has high flash point and initial oxidation temperature, long oxidation induction period and outstanding high-temperature resistance and oxidation resistance; low pour point and low volatility; carbon deposit is not easy to generate at high temperature, and the capability of inhibiting the generation of high-temperature sediments is good; the friction coefficient and the wear scar diameter are obviously reduced, and the antirust paint has excellent corrosion resistance and rust resistance; the service life of the equipment is prolonged; the noise is small; saving fuel, reducing discharge and having little pollution.
Description
Technical Field
The invention relates to the technical field of lubricating oil, in particular to engine lubricating oil and a preparation method thereof.
Background
Engines are the heart of automobiles and many industrial equipment, and the consumption of lubricating oil accounts for about 50% of the total amount of lubricating oil, which is the most interesting and most updated kind of lubricating oil industry. The engine lubricating oil is used as the blood of the engine, the performance of the engine lubricating oil directly affects the dynamic property, the safety and the reliability of the engine, plays roles in lubrication, cooling, sealing, cleaning, rust prevention, corrosion prevention and the like, and is a functional liquid for keeping the long service life and the high-efficiency running of the engine.
With the increasing precision of the manufacture of engines, the requirements on the performances of the lubricating oil, such as oxidation resistance, sealing property, high temperature resistance, piston cleanliness, abrasion resistance and the like, are higher and higher. The oxidation stability of engine lubricating oils is an extremely important control index. The lubricating oil is affected by factors such as operating temperature, metal catalysis, combustion products, blow-by gas and the like in the using process, the antioxidant activity is gradually lost, and the oxidation deterioration is easy to occur; so that the detergency, dispersancy, abrasion resistance and the like of the oil are damaged, the viscosity is increased, acid products are increased, paint films and deposits are formed, and the damage is caused to engine parts. The existing engine lubricating oil has poor oxidation resistance, high temperature resistance, abrasion resistance, sealing property and the like, so that the abrasion of an engine is aggravated, the corrosion of a piston ring and a cylinder sleeve is serious, a filter screen is blocked, and the oil change period is shortened.
Therefore, the research and development of the engine lubricating oil for improving the oxidation resistance, the sealing property, the high temperature resistance, the detergency and the abrasion resistance can prolong the service life of an engine and reduce the noise, and the engine lubricating oil has very important economic and social values.
Disclosure of Invention
The invention aims to provide engine lubricating oil and a preparation method thereof aiming at the defects of the prior art. The engine lubricating oil has outstanding high-temperature resistance and oxidation resistance; good ability to inhibit the formation of high temperature deposits; excellent corrosion resistance, rust resistance and abrasion resistance; the service life of the equipment can be prolonged; the noise is small.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides engine lubricating oil which comprises the following components in parts by weight:
preferably, the base oil comprises PAO6, PAO10 and synthetic esters in a weight ratio of 30-35: 35-45: 10-25.
Preferably, the antioxidant comprises one or more of zinc dialkyl dithiophosphate, alkyl diphenylamine and a thiophenol ester type antioxidant.
Preferably, the friction modifier comprises one or more of molybdenum dialkyl dithiophosphate, molybdenum dialkyl dithiocarbamate, molybdenum xanthate, molybdate ester, nano borate and nano boric acid.
Preferably, the viscosity index modifier comprises one or more of polymethacrylate, styrene-isoprene copolymer and ethylene propylene copolymer.
Preferably, the pour point depressant comprises one or more of poly alpha-olefin, polymethacrylate and alkyl naphthalene; the defoaming agent is a polysiloxane type defoaming agent.
Preferably, the metal detergent contains one or more of high-base-number calcium sulfonate, sulfurized calcium alkyl phenate and high-base-number magnesium sulfonate; the base numbers of the high-base-number calcium sulfonate and the high-base-number magnesium sulfonate are both 300-450 mgKOH/g.
Preferably, the ashless dispersant comprises one or more of polyisobutylene mono-succinimide, polyisobutylene bis-succinimide and boronized polyisobutylene succinimide; in the polyisobutylene mono-succinimide, polyisobutylene bis-succinimide and boronized polyisobutylene succinimide, the number average molecular weight of the polyisobutylene part is 600-4500.
The invention also provides a preparation method of the engine lubricating oil, which comprises the following steps:
1) mixing base oil, an antioxidant and a pour point depressant to obtain a first mixture;
2) mixing the first mixture, a friction modifier, a viscosity index modifier and an ashless dispersant to obtain a second mixture;
3) and mixing the second mixture, the defoaming agent and the metal detergent to obtain the engine lubricating oil.
Preferably, the mixing temperature in the step 1) is 40-50 ℃, and the time is 1-2 h; the mixing temperature in the step 2) is 45-55 ℃, and the mixing time is 0.5-1.5 h; the mixing temperature in the step 3) is 60-70 ℃, and the mixing time is 0.5-1 h.
The beneficial effects of the invention include the following:
1) the lubricating oil has high flash point and initial oxidation temperature, long oxidation induction period and outstanding high-temperature resistance and oxidation resistance; low pour point and low volatility; carbon deposit is not easy to generate at high temperature, and the capability of inhibiting the generation of high-temperature deposit is good.
2) The lubricating oil provided by the invention has the advantages that the friction coefficient and the wear scar diameter are obviously reduced, the anti-corrosion and anti-rust performance is excellent, and the abrasion of equipment is slowed down; the service life of the equipment is prolonged.
3) The lubricating oil has low noise; the fuel is saved, the emission is reduced, and the pollution is low; the automobile using the lubricating oil of the invention has the driving mileage of over 50 kilometers and no oil leakage.
Detailed Description
The invention provides engine lubricating oil which comprises the following components in parts by weight:
the engine lubricating oil comprises 75-90 parts of base oil, preferably 80-88 parts of base oil, and further preferably 82-85 parts of base oil.
The base oil preferably comprises PAO6, PAO10 and synthetic esters, wherein the weight ratio of the PAO6 to the PAO10 to the synthetic esters is preferably 30-35: 35-45: 10-25, more preferably 32-34: 38-42: 15-22, and even more preferably 33:40: 18-20; the synthetic ester is preferably pentaerythritol ester, and the viscosity of the pentaerythritol is preferably 7-9 mm at 90 DEG C2/s。
The base oil is fully synthetic base oil, and has high viscosity index, excellent low-temperature performance, oxidation resistance and thermal stability; the problem of oxidation of lubricating oil with high power density and the problem of engine knocking caused by high-temperature sediment brought by a turbocharger can be effectively solved; the base oil can effectively improve the swelling property of an engine sealing element, prevent oil leakage, reduce noise and improve the oil film strength of an engine during operation.
The engine lubricating oil disclosed by the invention comprises 0.5-4 parts of antioxidant, preferably 1-3 parts, and further preferably 2 parts.
The antioxidant preferably comprises one or more of zinc dialkyl dithiophosphate, alkyl diphenylamine and a thiophenol ester type antioxidant; when the antioxidant contains several components at the same time, the components are mixed in equal mass proportions; the zinc dialkyl dithiophosphate preferably comprises zinc n-butyl, 2-ethylhexyl dithiophosphate and zinc n-butyl, 4-ethyl-2-hexyl dithiophosphate, wherein the mass ratio of the zinc n-butyl, 2-ethylhexyl dithiophosphate to the zinc n-butyl, 4-ethyl-2-hexyl dithiophosphate is preferably 0.5-2: 1, and more preferably 1-1.5: 1; the sulfophenol ester type antioxidant is preferably 2, 2' -thiobis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate ]; the alkyl diphenylamine is preferably tert-butyl diphenylamine or isooctyl diphenylamine.
The zinc dithiophosphate of the invention has excellent oxidation resistance, abrasion resistance and corrosion resistance, and generally has an oxidation resistance effect by trapping free radicals and decomposing hydroperoxides. The common use of the thiophenol ester antioxidant and the alkyl diphenylamine has an obvious synergistic effect, can reduce the phenomenon that the lubricating oil generates foam due to mechanical stirring in the actual use process, and avoids the problem that the oil film of parts of engine parts is broken and abraded due to generation of a large amount of foam.
The engine lubricating oil disclosed by the invention comprises 5-8 parts of friction modifier, preferably 6-7 parts.
The friction modifier preferably comprises one or more of molybdenum dialkyl dithiophosphate, molybdenum dialkyl dithiocarbamate, molybdenum xanthate, molybdate ester, nano borate and nano boric acid; the molybdenum dialkyl dithiocarbamate is preferably 4-5: 2-3: 0.5-1, and the nano boric acid is preferably 4:2: 1.
The engine lubricating oil comprises 0.3-13 parts of viscosity index modifier, preferably 1-10 parts, more preferably 3-8 parts, and more preferably 5-7 parts.
The viscosity index modifier preferably comprises one or more of polymethacrylate, styrene-isoprene copolymer and ethylene-propylene copolymer; when the viscosity index modifier contains several components at the same time, the components are mixed in an equal mass ratio.
The engine lubricating oil comprises 0.03-3 parts of pour point depressant, preferably 0.1-2 parts, more preferably 0.5-1.5 parts, and even more preferably 1 part.
The pour point depressant of the invention preferably comprises one or more of poly alpha-olefin, polymethacrylate and alkyl naphthalene; when the pour point depressant contains several components at the same time, the components are mixed in equal mass proportions.
The engine lubricating oil comprises 0.03-0.8 part of defoaming agent, preferably 0.1-0.5 part, more preferably 0.2-0.4 part, and more preferably 0.3 part.
The defoaming agent of the present invention is preferably a polysiloxane-type defoaming agent, and more preferably silicone oil or polydimethylsiloxane.
The engine lubricating oil comprises 3-5 parts of metal detergent, preferably 3.5-4.5 parts, and more preferably 4 parts.
The metal detergent disclosed by the invention preferably comprises one or more of high-base-number calcium sulfonate, sulfurized calcium alkyl phenate and high-base-number magnesium sulfonate; further preferably contains high-base-number calcium sulfonate and high-base-number magnesium sulfonate; when the metal detergent contains several components at the same time, the components are mixed in an equal mass ratio; the base numbers of the high-base-number calcium sulfonate and the high-base-number magnesium sulfonate are preferably 300-450 mgKOH/g, and more preferably 350-400 mgKOH/g.
The high-base-number calcium sulfonate and the high-base-number magnesium sulfonate have high base numbers and excellent acid neutralization capacity. Since general engine oil contains sulfur, sulfur compounds generated after combustion and water are mixed to form acidic substances, which corrode metal exhaust pipes. The metal detergent disclosed by the invention can effectively neutralize acidic substances generated during engine oil combustion, so that the formation of the acidic substances is remarkably reduced, and the corrosion problem of metal devices is effectively avoided. The metal detergent disclosed by the invention has better detergency and antirust property besides ensuring that lubricating oil has a certain base number to neutralize acidic substances.
The engine lubricating oil comprises 6-9 parts of an ashless dispersant, preferably 6.5-8.5 parts, and more preferably 7-8 parts.
The ashless dispersant of the invention preferably comprises one or more of polyisobutylene mono-succinimide, polyisobutylene di-succinimide and boronized polyisobutylene succinimide; when the ashless dispersant contains several components at the same time, the components are mixed in equal mass proportions; in the polyisobutylene mono-succinimide, polyisobutylene bis-succinimide and boronized polyisobutylene succinimide, the number average molecular weight of the polyisobutylene part is preferably 600-4500, more preferably 1000-3500, and even more preferably 1500-2500.
The ashless dispersant disclosed by the invention has good dispersibility, thermal stability, oxidation resistance, wear resistance and rubber swelling property.
The invention also provides a preparation method of the engine lubricating oil, which comprises the following steps:
1) mixing base oil, an antioxidant and a pour point depressant to obtain a first mixture;
2) mixing the first mixture, a friction modifier, a viscosity index modifier and an ashless dispersant to obtain a second mixture;
3) and mixing the second mixture, the defoaming agent and the metal detergent to obtain the engine lubricating oil.
The mixing temperature in the step 1) of the invention is preferably 40-50 ℃, more preferably 42-47 ℃, and more preferably 44-45 ℃; the mixing time is preferably 1-2 h, and more preferably 1.5 h; the mixing temperature in the step 2) is preferably 45-55 ℃, more preferably 48-52 ℃, and more preferably 50 ℃; the mixing time is preferably 0.5-1.5 h, and more preferably 1 h; the mixing temperature in the step 3) is preferably 60-70 ℃, more preferably 63-68 ℃, and more preferably 65-66 ℃; the mixing time is preferably 0.5-1 h, and more preferably 0.75 h; the mixing in the steps 1) to 3) is preferably carried out under stirring conditions, and the stirring speed is preferably 500-2500 r/min, more preferably 1000-2000 r/min, and even more preferably 1500 r/min.
In the lubricating oil, the phosphorus content is not more than 0.08 wt%, the sulfur content is not more than 0.25 wt%, the sulfated ash content is not more than 0.85 wt%, and the nitrogen content is not more than 0.09 wt%; the base number is 8.5-10 mgKOH/g; can meet the requirement of high-performance engine lubricating oil.
The engine lubricating oil has the compatibility adaptability of the outstanding rubber sealing ring, can prevent engine oil leakage and gas blowby of gas of the engine, and improves the dynamic property of the engine; the lubricating oil can obviously reduce the oil consumption of the engine, improve the emission of the engine, and prolong the oil change period of the engine oil and the service life of the engine.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
75kg of base oil (30 kg, 35kg, 10kg of PAO6, PAO10 and pentaerythritol ester in the base oil, respectively), 0.3kg of n-butyl, 2-ethylhexyl zinc dithiophosphate, 0.2kg of n-butyl, 4-ethyl-2-hexyl zinc dithiophosphate and 0.03kg of polyalpha olefin were added to a reaction vessel and mixed at 40 ℃ and 1000r/min for 2 hours. Then 5kg of molybdenum dialkyldithiophosphate, 0.3kg of polymethacrylate, 3kg of polyisobutylene mono-succinimide, 3kg of polyisobutylene bis-succinimide (both polyisobutylene mono-succinimide and polyisobutylene bis-succinimide have a number average molecular weight of 1500 in the polyisobutylene moiety) were added and mixed at 45 ℃ and 1000r/min for 1.5 hours. And finally, adding 0.03kg of silicone oil and 3kg of sulfurized calcium alkyl phenate, and mixing for 1h at the temperature of 60 ℃ and the rotating speed of 1000r/min to obtain the engine lubricating oil.
The engine lubricating oil of example 1 had a phosphorus content of 0.075 wt.%, a sulfur content of 0.25 wt.%, a sulfated ash content of 0.8 wt.%, and a nitrogen content of 0.09 wt.%; the base number was 8.5 mgKOH/g.
Example 2
90kg of base oil (35 kg, 40kg and 15kg of PAO6, PAO10 and pentaerythritol ester in the base oil, respectively), 2kg of tert-butyldiphenylamine, 2kg of 2, 2' -thiobis [ ethyl 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and 3kg of polymethacrylate were added to a reaction kettle and mixed at 50 ℃ and 2000r/min for 1 hour. Then, 4kg of molybdenum xanthate, 4kg of molybdate ester, 13kg of styrene-isoprene copolymer and 9kg of polyisobutylene bis-succinimide (number average molecular weight of polyisobutylene portion: 4000) were added and mixed at 55 ℃ and 2000r/min for 0.5 hour. And finally, adding 0.8kg of polydimethylsiloxane, 2.5kg of high-base-number magnesium sulfonate and 2.5kg of high-base-number magnesium sulfonate, and mixing at 70 ℃ and 2000r/min for 0.5h to obtain the engine lubricating oil.
The engine lubricating oil of example 2 had a phosphorus content of 0.07 wt.%, a sulfur content of 0.2 wt.%, a sulfated ash content of 0.75 wt.%, and a nitrogen content of 0.08 wt.%; the base number was 9.5 mgKOH/g.
Example 3
80kg of base oil (30 kg, 38kg, 12kg of the base oil, PAO6, PAO10 and pentaerythritol ester, respectively), 1kg of n-butyl, 2-ethylhexyl zinc dithiophosphate, 1kg of n-butyl, 4-ethyl-2-hexyl zinc dithiophosphate, 1kg of polyalpha olefin and 0.5kg of alkylnaphthalene were charged into a reaction vessel and mixed at 45 ℃ and 1500r/min for 1.5 hours. Then 4kg of molybdenum dialkyldithiocarbamate, 2kg of nano borate, 1kg of nano boric acid, 2.5kg of styrene-isoprene copolymer, 2.5kg of ethylene-propylene copolymer and 7kg of boronized polyisobutylene succinimide (number average molecular weight of polyisobutylene moiety is 3000) were added and mixed at 50 ℃ and 1500r/min for 1 hour. And finally, adding 0.5kg of polydimethylsiloxane, 2kg of high-base-number magnesium sulfonate and 2kg of high-base-number magnesium sulfonate, and mixing at 65 ℃ and 1500r/min for 0.75h to obtain the engine lubricating oil.
The engine lubricating oil of example 3 had a phosphorus content of 0.065 wt.%, a sulfur content of 0.18 wt.%, a sulfated ash content of 0.75 wt.%, and a nitrogen content of 0.08 wt.%; the base number was 9 mgKOH/g.
The engine lubricating oils of examples 1 to 3 were subjected to the following performance tests:
the test method for viscosity index is GB/T1995;
the pour point test method is GB/T3535;
the test method of the flash point is GB/T3536;
the high-temperature abrasion resistance test adopts a high-frequency reciprocating friction tester, and the test conditions are that the load is 1000g, the frequency is 40Hz, the temperature is 150 ℃, and the duration time is 60 minutes;
high temperature deposit assessment test (TEOST-MHT);
the initial oxidation temperature is measured by a TA5000-DSC2910 differential thermal analyzer;
the oxidation induction period is measured by a high Pressure Differential Scanning Calorimetry (PDSC);
the test method of noise measurement is GB/T4214, 12000, 60 km/h;
the results of the performance tests are shown in table 1.
TABLE 1 Performance test values for lubricating oils of examples 1 to 3
| Sample (I) | Example 1 | Example 2 | Example 3 |
| Viscosity index | 132 | 136 | 139 |
| Pour point/. degree.C | -43 | -45 | -47 |
| Flash point/. degree.C | 250 | 255 | 260 |
| Abrasive grain diameter/mum | 230 | 225 | 220 |
| Amount of deposit formed/mg | 17.2 | 16.3 | 14.5 |
| Initial oxidation temperature/. degree.C | 250 | 256 | 260 |
| Oxidative induction period/min | 62 | 63.5 | 64.3 |
| Noise/decibel | 45 | 43 | 42 |
The lubricating oil has high flash point and initial oxidation temperature, long oxidation induction period and outstanding high-temperature resistance and oxidation resistance; low pour point and low volatility; carbon deposit is not easy to generate at high temperature, and the capability of inhibiting the generation of high-temperature deposit is good.
The lubricating oil provided by the invention has the advantages that the friction coefficient and the wear scar diameter are obviously reduced, the anti-corrosion and anti-rust performance is excellent, and the abrasion of equipment is slowed down; the service life of the equipment is prolonged.
The lubricating oil has low noise; the fuel is saved, the emission is reduced, and the pollution is low; the automobile using the lubricating oil of the invention has the driving mileage of over 50 kilometers and no oil leakage.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The engine lubricating oil is characterized by comprising the following components in parts by weight:
2. the engine lubricant according to claim 1, wherein the base oil comprises PAO6, PAO10, and synthetic esters in a weight ratio of 30-35: 35-45: 10-25.
3. The engine oil of claim 1 or 2, wherein the antioxidant comprises one or more of zinc dialkyldithiophosphate, alkyl diphenylamine and a thiophenol ester type antioxidant.
4. The engine lubricating oil of claim 3, wherein the friction modifier comprises one or more of molybdenum dialkyldithiophosphates, molybdenum dialkyldithiocarbamates, molybdenum xanthates, molybdates, nanoborates, and nanoboric acids.
5. The engine lubricating oil of claim 4, wherein the viscosity index modifier comprises one or more of polymethacrylate, styrene-isoprene copolymer and ethylene propylene copolymer.
6. The engine lubricating oil of claim 4 or 5, wherein the pour point depressant comprises one or more of a poly-alpha-olefin, a polymethacrylate, and an alkylnaphthalene; the defoaming agent is a polysiloxane type defoaming agent.
7. The engine lubricating oil of claim 6, wherein the metal detergent comprises one or more of an overbased calcium sulfonate, a sulfurized calcium alkyl phenate, and an overbased magnesium sulfonate; the base numbers of the high-base-number calcium sulfonate and the high-base-number magnesium sulfonate are both 300-450 mgKOH/g.
8. The engine lubricating oil of claim 7, wherein the ashless dispersant comprises one or more of polyisobutylene mono-succinimide, polyisobutylene di-succinimide, and borated polyisobutylene succinimide; in the polyisobutylene mono-succinimide, polyisobutylene bis-succinimide and boronized polyisobutylene succinimide, the number average molecular weight of the polyisobutylene part is 600-4500.
9. The method for producing the engine lubricating oil according to any one of claims 1 to 8, characterized by comprising the steps of:
1) mixing base oil, an antioxidant and a pour point depressant to obtain a first mixture;
2) mixing the first mixture, a friction modifier, a viscosity index modifier and an ashless dispersant to obtain a second mixture;
3) and mixing the second mixture, the defoaming agent and the metal detergent to obtain the engine lubricating oil.
10. The engine lubricating oil of claim 9, wherein the temperature of the mixing in step 1) is 40-50 ℃ and the time is 1-2 h; the mixing temperature in the step 2) is 45-55 ℃, and the mixing time is 0.5-1.5 h; the mixing temperature in the step 3) is 60-70 ℃, and the mixing time is 0.5-1 h.
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| CN115537254A (en) * | 2021-12-13 | 2022-12-30 | 湖北金曼利石化有限公司 | High-temperature-resistant wear-resistant engine lubricating oil composition and preparation method thereof |
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| CN114958463A (en) * | 2022-01-28 | 2022-08-30 | 浙江丽境环保科技工程有限公司 | Preparation method and product of energy-saving emission-reducing engine oil composition additive |
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