CN116948724A - Low-ash car engine lubricating oil composition and preparation method thereof - Google Patents
Low-ash car engine lubricating oil composition and preparation method thereof Download PDFInfo
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- CN116948724A CN116948724A CN202210395322.5A CN202210395322A CN116948724A CN 116948724 A CN116948724 A CN 116948724A CN 202210395322 A CN202210395322 A CN 202210395322A CN 116948724 A CN116948724 A CN 116948724A
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- lubricating oil
- ashless
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- 239000010687 lubricating oil Substances 0.000 title claims abstract description 78
- 239000000203 mixture Substances 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 44
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 43
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 239000003513 alkali Substances 0.000 claims abstract description 24
- 239000002199 base oil Substances 0.000 claims abstract description 23
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 22
- 239000003831 antifriction material Substances 0.000 claims abstract description 20
- 239000002270 dispersing agent Substances 0.000 claims abstract description 20
- 230000000994 depressogenic effect Effects 0.000 claims abstract description 16
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 15
- 239000000853 adhesive Substances 0.000 claims abstract description 12
- 239000002585 base Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 150000001412 amines Chemical class 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 150000002148 esters Chemical class 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- -1 ester compound Chemical class 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 239000011574 phosphorus Substances 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 239000011593 sulfur Substances 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 150000004985 diamines Chemical class 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000006386 neutralization reaction Methods 0.000 claims description 4
- 239000003760 tallow Substances 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 239000010705 motor oil Substances 0.000 abstract description 21
- 239000000654 additive Substances 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 17
- 239000000446 fuel Substances 0.000 abstract description 8
- 230000002195 synergetic effect Effects 0.000 abstract description 5
- 239000003599 detergent Substances 0.000 abstract description 4
- 230000005764 inhibitory process Effects 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 26
- 238000012360 testing method Methods 0.000 description 19
- 239000007789 gas Substances 0.000 description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- 230000003647 oxidation Effects 0.000 description 11
- 238000007254 oxidation reaction Methods 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 10
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 9
- 230000000996 additive effect Effects 0.000 description 8
- 239000013049 sediment Substances 0.000 description 8
- 239000010802 sludge Substances 0.000 description 8
- WMYJOZQKDZZHAC-UHFFFAOYSA-H trizinc;dioxido-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S WMYJOZQKDZZHAC-UHFFFAOYSA-H 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000003345 natural gas Substances 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 239000008186 active pharmaceutical agent Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 125000000217 alkyl group Chemical group 0.000 description 5
- 229960002317 succinimide Drugs 0.000 description 5
- 229920002367 Polyisobutene Polymers 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 4
- 239000013538 functional additive Substances 0.000 description 4
- 239000003502 gasoline Substances 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 3
- AMTWCFIAVKBGOD-UHFFFAOYSA-N dioxosilane;methoxy-dimethyl-trimethylsilyloxysilane Chemical compound O=[Si]=O.CO[Si](C)(C)O[Si](C)(C)C AMTWCFIAVKBGOD-UHFFFAOYSA-N 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229920002545 silicone oil Polymers 0.000 description 3
- 229940083037 simethicone Drugs 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000003254 anti-foaming effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- RNQNKOBSVNOJRI-UHFFFAOYSA-N heptan-4-imine Chemical compound CCCC(=N)CCC RNQNKOBSVNOJRI-UHFFFAOYSA-N 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- 239000007866 anti-wear additive Substances 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- LXEICSSQIFZBRE-UHFFFAOYSA-N dihydroxy-(6-methylheptylsulfanyl)-sulfanylidene-$l^{5}-phosphane Chemical compound CC(C)CCCCCSP(O)(O)=S LXEICSSQIFZBRE-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000010711 gasoline engine oil Substances 0.000 description 1
- 125000005456 glyceride group Chemical group 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 150000002432 hydroperoxides Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- XEOXZSREIVIEIP-UHFFFAOYSA-N trizinc [butyl(octyl)-lambda4-sulfanylidene]-dioxido-sulfido-lambda5-phosphane Chemical compound C(CCC)S(=P([S-])([O-])[O-])CCCCCCCC.[Zn+2].C(CCC)S(=P([S-])([O-])[O-])CCCCCCCC.[Zn+2].[Zn+2] XEOXZSREIVIEIP-UHFFFAOYSA-N 0.000 description 1
- GBEDXBRGRSPHRI-UHFFFAOYSA-L zinc;octoxy-octylsulfanyl-oxido-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCCCCCCOP([O-])(=S)SCCCCCCCC.CCCCCCCCOP([O-])(=S)SCCCCCCCC GBEDXBRGRSPHRI-UHFFFAOYSA-L 0.000 description 1
Classifications
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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
-
- 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
- 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
-
- 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
- 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
-
- 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
- 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
-
- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/22—Heterocyclic nitrogen compounds
- C10M2215/223—Five-membered rings containing nitrogen and carbon only
-
- 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
- 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
-
- 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/02—Pour-point; Viscosity index
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/04—Detergent property or dispersant property
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/18—Anti-foaming property
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/40—Low content or no content compositions
- C10N2030/45—Ash-less or low ash content
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/54—Fuel economy
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention discloses a low-ash car engine lubricating oil composition and a preparation method thereof, wherein the composition comprises the following components in percentage by mass: 3.0 to 5.0 percent of ashless dispersant, 2.0 to 3.0 percent of antioxidant antiwear agent, 0.1 to 1.0 percent of antifriction agent, 0.5 to 1.0 percent of ashless alkali reinforcing agent, 6.0 to 8.0 percent of adhesive agent, 0.2 to 0.5 percent of pour point depressant, 0.001 to 0.010 percent of anti-foaming agent and the balance of base oil. The types and the proportions of the additives are introduced and adjusted, the use of the metal detergent in the conventional lubricating oil system is broken, the inhibition effect among the single agents is reduced, the synergistic effect among the additives is improved, the sulfated ash content of the engine oil is reduced under the condition that the base number of the engine oil is not reduced, the friction coefficient of the engine oil is greatly reduced, and the prepared engine oil has lower ash content, excellent high-temperature detergency and fuel economy.
Description
Technical Field
The invention belongs to the technical field of lubricating oil, relates to a low-ash car engine lubricating oil composition and also relates to a preparation method of the lubricating oil composition.
Background
The CO emission of the gas automobile is reduced by more than 90 percent compared with that of a gasoline automobile, the hydrocarbon emission is reduced by more than 70 percent, and the oxynitride emission is reduced by more than 35 percent, so that the gas automobile is a practical low-emission automobile. The natural gas automobiles are promoted in China from 1989 to 2018, the natural gas automobile holding quantity in China is 670 ten thousand, sales volume is in an overall rising trend, the sales volume of the natural gas automobiles in China in 2015 is 61687, and the sales volume of the natural gas automobiles in China reaches 140484 in 2020. With the increase of the maintenance amount of gas automobiles, the annual demand of gas engine oil is continuously rising, and because the gas is different from gasoline, the gas has high purity, high heat efficiency, high gas temperature and clean combustion, but has poor lubricity and contains a certain amount of sulfur, the gas is easy to cause the abrasion of the related parts of the engine, such as bonding, friction, corrosion, rust and the like. Therefore, conventional engine oils are not suitable for lubrication of gas engines, but require specialized gas engine lubricating oils.
The requirements of the gas engine on lubricating oil mainly comprise the following points: the combustion temperature of the fuel gas is relatively high, and the lubricating oil is easy to oxidize, so that the lubricating oil is required to have relatively good oxidation resistance; the gasoline in the gasoline engine is sprayed into the cylinder in the form of mist droplets, so that the engine can lubricate and cool the valve, the valve seat and other parts, and the fuel gas enters the cylinder in a gaseous state, so that the engine has no liquid lubrication function, is easy to dry and lubricate the valve, the valve seat and other parts, and is easy to produce adhesive wear; the combustion exhaust gas is easy to generate nitrogen oxides at high temperature, and if the nitrogen oxides enter a crankcase, the lubricating oil accelerates the oxidative deterioration, so the lubricating oil is required to have better oxidation stability and cleaning dispersibility; the cleaning capability of natural gas to sediments generated by the combustion of lubricating oil in a combustion chamber is insufficient, high ash content lubricating oil is extremely easy to generate hard sediments on the surface of engine parts, abnormal abrasion of the engine, blockage of a spark plug and carbon deposit of a valve are promoted, engine knocking, ignition loss or valve flaming are caused, and therefore the ash content of the lubricating oil is required not to be too high; at the same time, because the fuel gas lacks lubricity to the combustion chamber, proper amount of ash can reduce valve wear, so that lubricating oil ash is required not to be too low, and lubricating oil products preferably have proper ash.
Disclosure of Invention
The invention aims to provide a low-ash car engine lubricating oil composition, which solves the problems that the ash content of the lubricating oil in the prior art is difficult to meet the requirement, and the cleaning and rust preventing performances are reduced due to the reduction of the base number of engine oil under low ash content.
The technical scheme adopted by the invention is that the low-ash car engine lubricating oil composition comprises the following components in percentage by mass:
3.0 to 5.0 percent of ashless dispersant, 2.0 to 3.0 percent of antioxidant antiwear agent, 0.1 to 1.0 percent of antifriction agent, 0.5 to 1.0 percent of ashless alkali reinforcing agent, 6.0 to 8.0 percent of adhesive agent, 0.2 to 0.5 percent of pour point depressant, 0.001 to 0.010 percent of anti-foaming agent and the balance of base oil.
The invention is also characterized in that:
the composition comprises the following components in percentage by mass:
4.0 to 5.0 percent of ashless dispersant, 2.0 to 3.0 percent of antioxidant antiwear agent, 0.4 to 1.0 percent of antifriction agent, 0.5 to 1.0 percent of ashless alkali reinforcing agent, 6.0 to 8.0 percent of adhesive agent, 0.2 to 0.4 percent of pour point depressant, 0.001 to 0.010 percent of anti-foaming agent and the balance of base oil.
The friction reducer is tallow diamine dibasic acid ester, the amine value is 100-140mgKOH/g, and the neutralization value is 90-100%.
The ashless alkali reinforcing agent is a hindered amine type ester compound, and the nitrogen content of the hindered amine type ester compound is 3.8-4.1%.
The antioxidant antiwear agent is three or four of amine ashless antioxidant, phenol ashless antioxidant, ester ashless antioxidant and dialkyl zinc dithiophosphate.
The invention also aims to provide a preparation method of the low-ash car engine lubricating oil composition.
The invention adopts another technical scheme that the preparation method of the low-ash car engine lubricating oil composition comprises the following steps:
step 1, adding base oil into a reaction kettle, heating to 60-80 ℃ and stirring for 1-2 hours, and then adding an anti-foaming agent into the reaction kettle and continuously stirring for 1-2 hours;
step 2, sequentially adding the pour point depressant and the finger sticking agent into the reaction kettle, and continuously stirring for 1-2 hours;
and step 3, sequentially adding the ashless dispersant, the antioxidant, the antifriction agent and the alkali reinforcing agent into a reaction kettle, and continuously stirring for 3-4 hours at 60-80 ℃ until the mixture is uniform, thus obtaining the low-ash car engine lubricating oil composition.
The sulfur content in the low ash type car engine lubricating oil composition is 0.10-0.20wt%, the phosphorus content is 0.07-0.08wt%, the nitrogen content is 0.1-0.2wt%, the base number is 6.5-8.0mgKOH/g, and the sulfated ash content is 0.4-0.5wt%.
The beneficial effects of the invention are as follows:
the low-ash car engine lubricating oil composition breaks through the use of metal detergents in the conventional lubricating oil system by introducing and adjusting the types and the proportion of additives, improves the synergistic effect of the additives while reducing the inhibition effect among the single agents, reduces the sulfated ash content of engine oil without reducing the base number of the engine oil, greatly reduces the friction coefficient of the engine oil, and has lower ash content and excellent high-temperature detergency and fuel economy. The preparation method of the low-ash car engine lubricating oil composition is simple to operate and easy to realize.
Drawings
FIG. 1 is a graph of the results of a VI E engine bench test of a low ash passenger car engine lubricating oil composition of the invention.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
The low-ash car engine lubricating oil composition comprises the following components in percentage by mass:
3.0 to 5.0 percent of ashless dispersant, 2.0 to 3.0 percent of antioxidant antiwear agent, 0.1 to 1.0 percent of antifriction agent, 0.5 to 1.0 percent of ashless alkali reinforcing agent, 6.0 to 8.0 percent of adhesive agent, 0.2 to 0.5 percent of pour point depressant, 0.001 to 0.010 percent of anti-foaming agent and the balance of base oil.
Further, the composition comprises the following components in percentage by mass:
4.0 to 5.0 percent of ashless dispersant, 2.0 to 3.0 percent of antioxidant antiwear agent, 0.4 to 1.0 percent of antifriction agent, 0.5 to 1.0 percent of ashless alkali reinforcing agent, 6.0 to 8.0 percent of adhesive agent, 0.2 to 0.4 percent of pour point depressant, 0.001 to 0.010 percent of anti-foaming agent and the balance of base oil.
The ashless dispersant is one or two of macromolecule succinimide, polyisobutylene monobutyldiimide and polyisobutylene bissuccinimide. The antioxidant antiwear agent is three or four of amine ashless antioxidant, phenol ashless antioxidant, ester ashless antioxidant and dialkyl zinc dithiophosphate. The friction reducer is tallow diamine dibasic acid ester, the amine value is 100-140mgKOH/g, and the neutralization value is 90-100%. The ashless alkali reinforcing agent is a hindered amine type ester compound, and the nitrogen content of the hindered amine type ester compound is 3.8-4.1%. The adhesive is ethylene propylene copolymer. The pour point depressant is poly-a-olefin. The anti-foaming agent is one or two of simethicone, alkyl acrylic acid copolymer and alkyl polyamide. The base oil is a high viscosity index hydrogenated base oil composition having properties meeting the API III base oil standards.
Friction reducer
In order to ensure that the composition has excellent antifriction performance, how to choose and divide between antifriction antiwear agents of different types and compounding of the adding proportion are very critical. For example, the antifriction effect of the organic molybdenum antifriction agent is mainly reflected in a boundary lubrication state, and the antifriction performance can be continuously and effectively exerted only by keeping the molybdenum content at a certain content, but the cleanliness of an oil product can be reduced while the antifriction performance is improved. And the optimal use proportion exists in different formula systems like glyceride and fatty amine antifriction agents, if the specific structures of the antifriction agents of the same type are different, the antifriction effects are different, the cleaning performance of the oil product can be reduced to a certain extent, and some antifriction agents of the same type can also cause the reduction of the anti-foaming performance of the oil product. The antifriction agent is specific tallow diamine dibasic acid ester, the amine value of which is 100-140mgKOH/g, and the neutralization value of which is 90-100%. The friction reducer achieves the aim of reducing friction by forming an adsorption film which is easy to shear on the friction surface through physical adsorption, and consumes less in the use process, so that the friction reducer has stronger friction-reducing holding capacity. The organometallic compounds are generally affected by the amount added, and the antiwear effect is not significant at low doses, and are also consumable additives in actual use. The invention selects the ashless antifriction agent with long-acting energy-saving effect for product development. The addition amount of the friction reducer is not particularly limited, and is usually 0.1-1.0% of the total mass of the lubricating oil composition, if the addition amount is less than 0.1%, the addition amount is too small, the friction coefficient of the oil product is too large to pass the energy-saving bench test, if the addition amount is more than 1.0%, the addition amount is too large, the additive is wasted, the cleaning performance of the oil product is reduced, and other beneficial effects are avoided.
Ashless alkali reinforcing agent
Because the cleaning capability of natural gas to sediments generated by the combustion of lubricating oil in a combustion chamber is insufficient, high ash content lubricating oil is extremely easy to generate hard sediments on the surface of engine parts, abnormal abrasion of the engine, blockage of a spark plug and carbon deposit of a valve are promoted, engine knocking, ignition loss or valve flaming are caused, and therefore the ash content of the lubricating oil is required not to be too high; at the same time, because the fuel gas lacks lubricity to the combustion chamber, proper amount of ash can reduce valve wear, so that lubricating oil ash is required not to be too low, and lubricating oil products preferably have proper ash. In order to ensure that the passenger car gas engine oil has lower ash content and does not cause the reduction of high-temperature detergency and alkali number due to the reduction of ash content, the invention specially uses an ashless alkali reinforcing agent, develops a great deal of compound research with other functional agents, and finally determines the species and dosage of the ashless alkali reinforcing agent. The ashless alkali reinforcing agent is a hindered amine type ester compound, and the nitrogen content of the ashless alkali reinforcing agent is 3.8-4.1%. The addition amount of the ashless alkali reinforcing agent is usually 0.5-1.0% of the total mass of the lubricating oil composition, if the addition amount is less than 0.5%, the addition amount is too small, no great help is brought to the improvement of the alkali value and the high-temperature detergency of engine oil, and if the addition amount is more than 1.0%, the addition amount is too large, the waste of the additive is caused, the effect of poor compatibility of the rubber of the oil is caused, and other beneficial effects are avoided.
Base oil
The energy saving properties of lubricating oils are related to the type and viscosity of the base oils, as well as to the functional additives, and the base oils involved in the compositions of the present invention may be two or more high viscosity index hydrogenated base oil compositions having properties meeting API group iii base oil standards. The base oil of the present invention is added in an amount of about 80.0 to 90.0% by weight based on the total mass of the lubricating oil composition, and if the amount is less than 80.0%, the amount is too small, which results in an increase in the amount of the additive to increase the cost, and if the amount is more than 90.0%, the amount is too large, which results in a decrease in the amount of the functional additive to impart the oil with the desired detergency, dispersibility, antioxidant and energy saving effects, and no other advantageous effects.
Finger sticking agent
The energy saving property of the lubricating oil is closely related to the type and the shear stability of the adhesive, and the adhesive of the invention adopts ethylene propylene copolymer with the shear index of 40. The addition amount of the adhesive disclosed by the invention is 6.0-8.0% of the total mass of the lubricating oil composition, if the addition amount is less than 6.0%, the addition amount is too small, the viscosity is lower, the thickness and stability of an oil film are reduced, the abrasion resistance of an oil product is reduced in actual use, if the addition amount is more than 8.0%, the addition amount is too large, the additive is wasted, the viscosity of the oil product is larger, the low-temperature performance and the cleaning performance are reduced, and other beneficial effects are avoided.
Ashless dispersant
The ashless dispersant in the lubricating oil composition provided by the invention can be one or two of macromolecule succinimide, polyisobutylene monobutyldiimide and polyisobutylene bissuccinimide. Ashless dispersants are surfactants, mainly used to disperse contaminants generated in engines, to ensure free flow of oil. The dispersibility of the ashless dispersant can help keep the engine clean and, in some cases, help maintain the cleanliness of the piston. Different types of dispersants have different dispersing effects on oil sludge and sediments, high-molecular dispersants generally have better dispersing effects on sediments generated at high temperature, and dispersants with general molecular weights have better dispersing effects on oil sludge generated at low temperature. The addition amount of the ashless dispersant is 3.0-5.0% of the total mass of the lubricating oil composition, if the addition amount is less than 4.0%, the addition amount is too small, the dispersion performance of the oil is reduced, the sediment on the surface of engine parts is increased, the oil sludge on the oil pan is thicker, and if the addition amount is more than 5.0%, the addition amount is too large, the additive is wasted, the effect of other functional additives in the lubricating oil is influenced, and other beneficial effects are avoided.
Antioxidant antiwear agent
In order to balance the interaction among the additives, particularly improve the energy conservation of oil products and compromise the limit range of phosphorus elements, a large amount of screening and compounding work is carried out on different types of antioxidant antiwear agents, the types and the dosages of the ester antioxidants are particularly examined, and the formed antioxidant antiwear additive system has excellent oxidation stability and provides antioxidant protection for the functions of other additives. The component B antioxidant antiwear agent is a mixture composed of any three or four of zinc butyl octyl dithiophosphate, zinc dioctyl dithiophosphate, zinc isopropyl isooctyl dithiophosphate, amine ashless antioxidant, phenol ashless antioxidant and ester ashless antioxidant. That is, the antioxidant antiwear agent contains at least two zinc dithiophosphates and at least one ashless antioxidant because of the synergistic effect between the zinc dithiophosphates and the ashless antioxidants. Zinc dithiophosphate has excellent antioxidant, antiwear and anticorrosive properties, and is considered to exert an antioxidant effect by capturing free radicals and decomposing hydroperoxides. The ashless antioxidant can provide hydrogen atoms for peroxide free radicals, damage or prevent chain growth, and generate low-energy stable free radicals, and the phenolic antioxidant and the amine antioxidant have obvious synergistic effect when being used together, because the phenol is favorable for regeneration of aromatic amine. The addition amount of the antioxidant antiwear agent is 2.0-3.0% of the total mass of the lubricating oil composition, if the addition amount is less than 2.0%, the addition amount is too small, the antioxidant performance is reduced, the effect of other functional additives in the lubricating oil cannot be effectively protected, the service life of the oil is shortened, if the addition amount is more than 3.0%, the addition amount is too much, the waste of the additives is caused, even the phosphorus content in the oil exceeds the standard specification requirement, and other beneficial effects are avoided.
Pour point depressant
The pour point depressant in the lubricating oil composition provided by the invention is poly-a olefin. The pour point of the lubricating oil can be reduced by adding the pour point depressant, and the use effect of the oil product in a low-temperature environment is improved. The addition amount of the pour point depressant is 0.2-0.5% of the total mass of the lubricating oil composition, if the addition amount is less than 0.2%, the addition amount is too small, so that the pour point of the lubricating oil does not meet the standard requirement, the fluidity under the low-temperature environment is affected, and if the addition amount is more than 0.5%, the addition amount is too large, the waste of the additive is caused, and other beneficial effects are avoided.
Antifoam agent
The anti-foaming agent in the lubricating oil composition provided by the invention can be dimethyl silicone oil or alkyl acrylic acid copolymer or alkyl polyamide or a combination of the dimethyl silicone oil and the alkyl polyamide, and can reduce the phenomenon that the lubricating oil generates foam due to mechanical stirring in the actual use process, and avoid the problem of abrasion caused by the rupture of an oil film of a part of an engine part due to the generation of a large amount of foam in the use process. The addition amount of the anti-foaming agent of the present invention is 0.001 to 0.010% of the total mass of the lubricating oil composition, and if the value is less than 0.001%, the use amount is too small, which causes a decrease in the anti-foaming property, and if the value is more than 0.010%, the use amount is too large, which causes the result of wasting the additive, and has no other advantageous effects.
The preparation method of the low-ash car engine lubricating oil composition comprises the following steps:
step 1, adding base oil into a reaction kettle, heating to 60-80 ℃ and stirring for 1-2 hours, and then adding an anti-foaming agent into the reaction kettle and continuously stirring for 1-2 hours;
step 2, sequentially adding the pour point depressant and the finger sticking agent into the reaction kettle, and continuously stirring for 1-2 hours;
and step 3, sequentially adding the ashless dispersant, the antioxidant, the antifriction agent and the alkali reinforcing agent into a reaction kettle, and continuously stirring for 3-4 hours at 60-80 ℃ until the mixture is uniform, thus obtaining the low-ash car engine lubricating oil composition.
The low ash type car engine lubricating oil composition prepared by the preparation method of the low ash type car engine lubricating oil composition has the sulfur content of 0.10-0.20wt%, the phosphorus content of 0.07-0.08wt%, the nitrogen content of 0.1-0.2wt%, the base number of 6.5-8.0mgKOH/g and the sulfated ash content of 0.4-0.5wt%.
Example 1
In this example, 100kg of the product is produced, and the raw materials used are: 2.0kg of monobutyronimide, 2.0kg of high molecular succinimide, 0.9kg of zinc dithiophosphate mixture, 1.6kg of ashless antioxidant mixture, 0.6kg of antifriction agent, 7.0kg of ashless alkali reinforcing agent with the base number of 145-160, 0.3kg of poly a olefin, 0.004kg of dimethyl silicone oil and 84.8kg of two API III hydrogenated base oil mixtures.
Example 2
In this example, 100kg of the product is produced, and the raw materials used are: 1.0kg of bissuccinimide, 3.5kg of macromolecular succinimide, 0.8kg of zinc dithiophosphate mixture, 1.3kg of ashless antioxidant mixture, 0.5kg of antifriction agent, 0.5kg of ashless alkali reinforcing agent with the base number of 145-160, 7.0kg of ethylene-propylene copolymer finger sticking agent, 0.3kg of poly a olefin, 0.005kg of simethicone and 85.1kg of two API III hydrogenated base oil mixture.
Example 3
In this example, 100kg of the product is produced, and the raw materials used are: 1.0kg of monobutyronimide, 3.5kg of high molecular succinimide, 0.8kg of zinc dithiophosphate mixture, 1.3kg of ashless antioxidant mixture, 0.5kg of antifriction agent, 0.5kg of ashless alkali reinforcing agent with the base number of 145-160, 7.0kg of ethylene-propylene copolymer finger sticking agent, 0.3kg of poly a olefin, 0.005kg of simethicone and 85.1kg of two API III hydrogenated base oil mixture.
The invention adopts the simulation test methods of heat pipe oxidation, SDT sludge dispersibility, MTM friction characteristics, PDSC (induction period) and the like in a laboratory to evaluate the high-temperature clean dispersibility, low-temperature sludge dispersibility, antifriction property and oxidation stability of the oil product obtained in the embodiment respectively. The simulation test conditions are as follows: the heat pipe oxidation test temperature is set to 290 ℃, the SDT sludge dispersibility test is set to 150 ℃ stirring temperature, the MTM (Mini Traction Machine) tester is used for evaluating the friction coefficient of an oil product under the elastic fluid dynamic pressure lubrication, boundary/mixing conditions, and is an important evaluation method of an energy-saving gasoline engine oil product, the research test is set to 50% slip ratio at 140 ℃ under 36N, and the PDSC oxidation induction period is set to 210 ℃. The test results are as follows:
TABLE 1 simulation results of the evaluation of the Properties of the lubricating oil composition of the present invention
As can be seen from the data in Table 1, the lubricating oils obtained in examples 1 to 3 have better high-temperature detergency, oxidation resistance and sludge dispersibility in the evaluation of the heat pipe oxidation, SDT sludge dispersibility and PDSC oxidation induction period simulation test.
The lubricating oil composition obtained in example 1 was subjected to an engine bench test according to the present invention, and the test results are shown in the following table and fig. 1:
TABLE 2 bench test results of lubricating oil composition of example 1 of the invention
As can be seen from the data in Table 2 and FIG. 1, the lubricating oil composition of example 1 passed the VI E engine bench test required by GF-6 quality index, and the actual measured values of the blended 5W-30 engine oil reached the standard requirements of 0W-20, 5W-20 and 5W-30, and had excellent fuel economy.
The lubricating oil composition of example 1 was examined by 1.5TGDI bench test
1.5TGDI engine has higher heat load and higher power per liter (80 kW/L), and an engine body is provided with an engine oil cooling nozzle which injects engine oil to the inner top of a piston to cool the piston in the running process of the engine, and the engine oil takes away the heat of the engine piston, so that the engine oil bears higher heat load, higher requirements are put on the high-temperature oxidation performance of the engine oil, and the oil is required to have better high-temperature cleaning performance so as to prevent the cleaning performance of the engine piston, the ring adhesion and reduce the generation of engine piston sediment and paint film; the engine adopts an in-cylinder direct injection technology, and is different from a fuel injection mode of a traditional electronic control multi-point injection engine, and the engine fuel is directly injected into a combustion chamber in a high-pressure mode through a fuel injector, so that the problem of deposit of an air inlet valve is obvious due to lack of flushing of fuel of the air inlet valve of the engine, and the influence of engine oil on the deposit of the engine is evaluated; in order to evaluate the comprehensive performance of the 1.5TGDI engine oil, the design of the bench test conditions comprehensively considers the program IIIG, IVA, VG test method, which comprises the high-temperature high-speed working condition and the medium-speed and idle low-temperature working condition so as to inspect the comprehensive performance of the oil product.
TABLE 3 1.5TGDI comprehensive Performance test results
The oil of example 1 also exhibited excellent detergent dispersibility, antiwear properties in a 1.5TGDI performance bench test.
Example 4
Step 1, adding base oil into a reaction kettle, heating to 70 ℃ and stirring for 1 hour, and then adding an anti-foaming agent into the reaction kettle and continuing stirring for 2 hours;
step 2, sequentially adding the pour point depressant and the finger sticking agent into a reaction kettle, and continuously stirring for 1 hour;
and step 3, sequentially adding the ashless dispersant, the antioxidant, the antifriction agent and the alkali reinforcing agent into a reaction kettle, and continuously stirring for 4 hours at 70 ℃ until the mixture is uniform, thus obtaining the low-ash car engine lubricating oil composition.
The low ash type car engine lubricating oil composition prepared by the preparation method of the low ash type car engine lubricating oil composition has the sulfur content of 0.19wt%, the phosphorus content of 0.07wt%, the nitrogen content of 0.18wt%, the base number of 7.5mgKOH/g and the sulfated ash content of 0.42wt%.
According to the low-ash car engine lubricating oil composition, on the basis of an additive action mechanism, complex screening and optimization compounding of different types of additives and additives with the same type and different compositions are carried out through various simulation test means, and key technical problems are finally solved through MTM simulation test, program VI E bench test and 1.5TGDI comprehensive bench test evaluation, the use of metal detergents in the conventional lubricating oil system is broken through by introducing and adjusting the types and the proportions of the additives, the synergistic effect among the additives is improved while the inhibition effect among the individual additives is reduced, the friction coefficient is greatly reduced, and the prepared engine oil has lower ash content and excellent high-temperature detergency and fuel economy. The preparation method of the low-ash car engine lubricating oil composition is simple to operate and easy to realize.
Claims (7)
1. The low-ash car engine lubricating oil composition is characterized by comprising the following components in percentage by mass:
3.0 to 5.0 percent of ashless dispersant, 2.0 to 3.0 percent of antioxidant antiwear agent, 0.1 to 1.0 percent of antifriction agent, 0.5 to 1.0 percent of ashless alkali reinforcing agent, 6.0 to 8.0 percent of adhesive agent, 0.2 to 0.5 percent of pour point depressant, 0.001 to 0.010 percent of anti-foaming agent and the balance of base oil.
2. The low ash car engine lubricating oil composition of claim 1, wherein the composition comprises the following components in mass percent:
4.0 to 5.0 percent of ashless dispersant, 2.0 to 3.0 percent of antioxidant antiwear agent, 0.4 to 1.0 percent of antifriction agent, 0.5 to 1.0 percent of ashless alkali reinforcing agent, 6.0 to 8.0 percent of adhesive agent, 0.2 to 0.4 percent of pour point depressant, 0.001 to 0.010 percent of anti-foaming agent and the balance of base oil.
3. The low ash car engine lubricating oil composition of claim 1, wherein the friction reducer is a tallow-based diamine dibasic acid ester having an amine value of 100 to 140mg koh/g and a neutralization value of 90 to 100%.
4. The low ash car engine lubricating oil composition of claim 1, wherein the ashless base reinforcement agent is a hindered amine type ester compound having a nitrogen content of 3.8 to 4.1%.
5. The low ash car engine lubricating oil composition of claim 1, wherein the antioxidant antiwear agent is three or four of an amine ashless antioxidant, a phenolic ashless antioxidant, an ester ashless antioxidant, and a zinc dialkyldithiophosphate.
6. The preparation method of the low-ash car engine lubricating oil composition is characterized by comprising the following steps of:
step 1, adding base oil into a reaction kettle, heating to 60-80 ℃ and stirring for 1-2 hours, and then adding an anti-foaming agent into the reaction kettle and continuously stirring for 1-2 hours;
step 2, sequentially adding the pour point depressant and the finger sticking agent into the reaction kettle, and continuously stirring for 1-2 hours;
and step 3, sequentially adding the ashless dispersant, the antioxidant, the antifriction agent and the alkali reinforcing agent into a reaction kettle, and continuously stirring for 3-4 hours at 60-80 ℃ until the mixture is uniform, thus obtaining the low-ash car engine lubricating oil composition.
7. The method for producing a low ash type car engine lubricating oil composition according to claim 6, wherein the sulfur content in the low ash type car engine lubricating oil composition is 0.10 to 0.20 wt.%, the phosphorus content is 0.07 to 0.08 wt.%, the nitrogen content is 0.1 to 0.2 wt.%, the base number is 6.5 to 8.0mgKOH/g, and the sulfated ash content is 0.4 to 0.5 wt.%.
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