CN114874829A - Lubricating oil composition for methanol engine and preparation method thereof - Google Patents
Lubricating oil composition for methanol engine and preparation method thereof Download PDFInfo
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 41
- 239000000203 mixture Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000002199 base oil Substances 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 21
- 229920000728 polyester Polymers 0.000 claims abstract description 20
- 239000003607 modifier Substances 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 14
- 239000008139 complexing agent Substances 0.000 claims abstract description 13
- 230000000994 depressogenic effect Effects 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- MQHWFIOJQSCFNM-UHFFFAOYSA-L Magnesium salicylate Chemical compound [Mg+2].OC1=CC=CC=C1C([O-])=O.OC1=CC=CC=C1C([O-])=O MQHWFIOJQSCFNM-UHFFFAOYSA-L 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229940072082 magnesium salicylate Drugs 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- QRLOHLWAIMSZLP-UHFFFAOYSA-N (1-methylpiperidin-4-yl) dodecanoate Chemical compound CCCCCCCCCCCC(=O)OC1CCN(C)CC1 QRLOHLWAIMSZLP-UHFFFAOYSA-N 0.000 claims description 2
- RZRNAYUHWVFMIP-KTKRTIGZSA-N 1-oleoylglycerol Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(O)CO RZRNAYUHWVFMIP-KTKRTIGZSA-N 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- RZRNAYUHWVFMIP-HXUWFJFHSA-N glycerol monolinoleate Natural products CCCCCCCCC=CCCCCCCCC(=O)OC[C@H](O)CO RZRNAYUHWVFMIP-HXUWFJFHSA-N 0.000 claims description 2
- 229920000193 polymethacrylate Polymers 0.000 claims description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims 1
- 125000000217 alkyl group Chemical group 0.000 claims 1
- 238000005728 strengthening Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 23
- 238000001556 precipitation Methods 0.000 abstract description 9
- 230000000052 comparative effect Effects 0.000 description 17
- 239000002585 base Substances 0.000 description 15
- 239000000047 product Substances 0.000 description 15
- 238000012360 testing method Methods 0.000 description 15
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 12
- 239000010705 motor oil Substances 0.000 description 12
- 238000002485 combustion reaction Methods 0.000 description 10
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 6
- 235000019253 formic acid Nutrition 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 239000003599 detergent Substances 0.000 description 4
- 238000013112 stability test Methods 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- PDEDQSAFHNADLV-UHFFFAOYSA-M potassium;disodium;dinitrate;nitrite Chemical group [Na+].[Na+].[K+].[O-]N=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O PDEDQSAFHNADLV-UHFFFAOYSA-M 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- -1 OCP Chemical class 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000012990 dithiocarbamate Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000263 2,3-dihydroxypropyl (Z)-octadec-9-enoate Substances 0.000 description 1
- RZRNAYUHWVFMIP-GDCKJWNLSA-N 3-oleoyl-sn-glycerol Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@H](O)CO RZRNAYUHWVFMIP-GDCKJWNLSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- SCJNCDSAIRBRIA-DOFZRALJSA-N arachidonyl-2'-chloroethylamide Chemical compound CCCCC\C=C/C\C=C/C\C=C/C\C=C/CCCC(=O)NCCCl SCJNCDSAIRBRIA-DOFZRALJSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000010711 gasoline engine oil Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- RZRNAYUHWVFMIP-UHFFFAOYSA-N monoelaidin Natural products CCCCCCCCC=CCCCCCCCC(=O)OCC(O)CO RZRNAYUHWVFMIP-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
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
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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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/144—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings containing hydroxy groups
-
- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/287—Partial esters
- C10M2207/289—Partial esters containing free hydroxy groups
-
- 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
- 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
-
- 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
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/102—Polyesters
-
- 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
- C10M2215/221—Six-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
- 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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- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
- C10M2219/089—Overbased salts
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- 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 lubricating oil composition for a methanol engine and a preparation method thereof, wherein the lubricating oil composition comprises 73.3-74.1 wt% of base oil, 10-15 wt% of high-viscosity metallocene PAO or polyester, 8.6-13.3 wt% of complexing agent, 0.5-2.0 wt% of base number reinforcing agent, 0.9-1.5 wt% of friction modifier and 0.2-0.5 wt% of pour point depressant, wherein the high-viscosity metallocene PAO or polyester is prepared fromThe viscosity of the metallocene PAO or polyester is 300-3000 mm 2 S; the base oil is a group II and/or group III base oil; the preparation method comprises the steps of mixing base oil and metallocene PAO or polyester, heating to 55-65 ℃, adding a pour point depressant, stirring and mixing uniformly, then sequentially adding a complexing agent and a base number reinforcing agent, continuously stirring and mixing uniformly, and finally adding a friction modifier, mixing and stirring uniformly; the lubricating oil composition uses high-viscosity metallocene PAO or polyester to replace a viscosity index improver OCP or HSD used in the traditional oil product, solves the problem of the precipitation of the viscosity index improver caused by methanol entering the oil tank, and improves the performance of the lubricating oil.
Description
Technical Field
The invention relates to a lubricating oil composition, in particular to a lubricating oil composition for a methanol engine and a preparation method thereof.
Background
The methanol fuel has great difference from common gasoline in combustion characteristics and combustion products, and has different requirements and influences on lubricating oil. The effect of methanol engines on lubricating oils is mainly reflected in: (1) formic acid, formaldehyde and water are generated from a methanol combustion product, the formic acid is a substance with strong acidity generated in the combustion process of methanol, a detergent dispersant of the engine lubricating oil is quickly consumed, and the detergent dispersant performance of the engine lubricating oil is reduced; (2) water generated by combustion enters a crankcase to cause the emulsification phenomenon of engine oil; (3) the methanol has strong dissolving capacity on the viscosity index improver in the lubricating oil, and unburned methanol enters the lubricating oil to separate out and precipitate the viscosity index improver, so that the performance of the engine lubricating oil is damaged; (4) because the methanol has small molecular weight, lower boiling point, good atomization in the combustion process and more sufficient combustion, the abrasion of an air inlet valve and an exhaust valve is mainly controlled by the ash content in the lubricating oil, and the ash content is too high, which causes the conditions of valve melting loss, combustion chamber and piston deposit lining abrasion, pre-ignition and the like, the methanol lubricating oil has certain requirement on the ash content and is not suitable to be higher. Therefore, lubricating oils for methanol engine oils should have a high base number, corrosion inhibition, wear resistance, and low ash content.
At present, the disclosed methanol engine oil is specially used for CN 103509634B, CN 110724583A and the like, and high molecular compounds such as OCP, HSD and the like are used as viscosity index improvers, during the use process, unburned methanol enters lubricating oil to precipitate the viscosity index improvers, so that the performance of the engine lubricating oil is damaged, and the product precipitation is easy to influence the performance of the lubricating oil.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a lubricating oil composition for a methanol engine, which can well solve the problem of precipitation of a viscosity index improver in the using process of methanol engine oil; it is another object of the present invention to provide a method for preparing the lubricating oil composition.
The technical scheme is as follows: the lubricating oil composition for the methanol engine comprises, by weight, 73.3-74.1% of base oil, 10-15% of high-viscosity metallocene PAO or polyester, 8-14% of complexing agent, 0.5-2% of base number reinforcing agent, 0.9-1.5% of friction modifier and 0.2-0.5% of pour point depressant, wherein the viscosity of the high-viscosity metallocene PAO or polyester is 300-3000 mm 2 S; the base oil is a group II and/or group III base oil.
The metallocene PAO is mPAO 300.
The polyester is Ketjenlube 23000.
In the formula composition of the engine oil, the base oil is the main component of the engine oil, determines the basic properties of the lubricating oil, and has the most basic performances of lubrication, cooling, oxidation resistance, corrosion resistance and the like. The complexing agent can make up and improve the deficiency of the base oil in terms of performance, and is an important component of the lubricating oil. The viscosity index improver can improve the viscosity of oil products and the viscosity-temperature performance of lubricating oil so as to obtain good low-temperature starting performance and keep proper viscosity at high temperature. The base number reinforcing agent is mainly used for improving the base number of oil products. The friction modifier has the main functions of forming a layer of lubricating protective film on the surface of metal, avoiding direct contact between metal peaks, reducing the friction coefficient under the states of mixed lubrication and boundary lubrication and reducing the friction resistance and abrasion. The pour point depressant has the functions of lowering the freezing point of the oil product and ensuring that the oil product can flow at low temperature.
The high-viscosity metallocene PAO or polyester is used for replacing a viscosity index improver OCP or HSD used in the traditional oil product, and the main reason is that the viscosity index improver introduces a polar functional group into a high polymer molecular skeleton in order to improve the related performance of the viscosity index improver and is easy to dissolve in methanol with strong polarity, so that the problem of precipitation of the viscosity index improver is caused; and the metallocene PAO and the polyester have no polarity or weak polarity, are not easy to dissolve in methanol, and can solve the problem of the precipitation of the viscosity index improver caused by the methanol entering an oil tank.
The base number reinforcing agent is a mixture of high base number sulfurized calcium alkyl phenate and magnesium salicylate or dodecanoic acid methylpiperidine-4-yl ester. The high base number can neutralize formic acid generated in the combustion process of the methanol engine oil, so that the early failure of the oil product caused by the too fast reduction of the base number of the oil product is delayed, and preferably, the base number reinforcing agent is Infineum D2360 or Lopal BT 590.
The friction modifier is formed by mixing glycerol monooleate and oil-soluble molybdenum dialkyl dithiocarbamate according to the mass ratio of 1: 0.3-0.5. The glyceryl monooleate is Hitec 7133, PV611, etc., and the oil-soluble molybdenum dialkyl dithiocarbamate is SAKURA-LUBE 525, POPUC 1002, etc. By reasonably compounding the ash-free friction reducer and the ash-containing friction reducer, the increase of ash content is reduced on the premise of better wear resistance and friction reduction performance, and the oxidation resistance, corrosion resistance and wear resistance of the lubricating oil composition are improved.
The II base oil is 150N, and the III base oil is Ultra-S4 and/or Ultra-S6.
The pour point depressant is polymethacrylate, such as VISCOPLEX1-248 or VISCOPLEX 1-300.
The compound additive is a gasoline engine compound with low ash content, such as Infineum P6091 or Infineum P5960 manufactured by Union of Runcinnati, USA.
The preparation method of the lubricating oil composition for the methanol engine comprises the following steps: mixing base oil and high-viscosity metallocene PAO or polyester, heating to 55-65 ℃, adding a pour point depressant, stirring and mixing uniformly, then sequentially adding a complexing agent and a base number reinforcing agent, continuously stirring and mixing uniformly, and finally adding a friction modifier, and mixing and stirring uniformly.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: (1) the high-viscosity metallocene PAO or polyester is used for replacing a viscosity index improver OCP or HSD used in the traditional oil product, so that the problem of the precipitation of the viscosity index improver caused by the methanol entering an oil tank can be solved, and the performance of the oil product is reduced; (2) the composite detergent of the high-base-number sulfurized calcium alkyl phenate and the magnesium salicylate can neutralize formic acid generated in the combustion process of the methanol engine oil, and delay the early failure of the oil due to the over-quick reduction of the base number of the oil; (3) the friction improver reduces the increase of ash content on the premise of better wear-resistant and friction-reducing performance by reasonably compounding the ashless friction reducer and the ash-containing friction reducer, and improves the oxidation resistance, corrosion resistance and wear resistance of the lubricating oil composition; (4) the preparation method is simple and easy to operate.
Description of the drawings:
FIG. 1 is an appearance diagram of a methanol engine oil stability test;
FIG. 2 is an appearance diagram of a methanol engine oil hydrostatic dispersion test.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
Example 1
The lubricating oil composition for the methanol engine comprises the following components in percentage by weight: 69.1 percent of base oil Ultra-S4, 5 percent of base oil 150N, 10.1 percent of mPAO300, 13.3 percent of complexing agent InfineumP6091, 0.5 percent of base number reinforcing agent InfineumD2360, 0.5 percent of friction modifier SAKURA-LUBE 525, 0.5 percent of friction modifier Hitec 7133, 1 percent of pour point depressant: 0.5 percent of VISCOPLEX 1-248.
The preparation method comprises the following steps: mixing the base oil and the high-viscosity metallocene PAO, heating to 55 ℃, adding the pour point depressant, stirring and mixing uniformly, then sequentially adding the complexing agent and the alkali number reinforcing agent, continuously stirring and mixing uniformly, and finally adding the friction modifier, mixing and stirring uniformly.
The base oils in this example were Ultra-S4 and Ultra-S6 was from korean S-Oil corporation; mPAO300 is from Exxon Mobil chemical industry, and has viscosity of 300mm 2 S; the compounding agent is a light-load engine compounding agent InfineumP6091 meeting the ACEA C4 specification, and is from American Union of Runji; the alkali value reinforcing agent InfineumD2360 is from American Union of Runji, and the main components are high alkali value sulfurized calcium alkyl phenate and magnesium salicylate; SAKURA-LUBE 525 is from Adideceae of Shanghai; hitec 7133 is from yahaton corporation, usa; VISCOPLEX1-300 was from Woundplast corporation, Wingchun, Germany.
Example 2
The lubricating oil composition for the methanol engine comprises the following components in percentage by weight: 53.3 percent of basic Ultra-S4, 20 percent of basic oil Ultra-S6, 15 percent of high-viscosity polyester Ketjenlube23000, 8.6 percent of complexing agent InfineumP5960, and 8.6 percent of base number reinforcing agent methyl piperidine-4-yl dodecanoate: 2%, friction modifier SAKURA-LUBE 525: 0.21%, friction modifier PV 611: 0.69%, pour point depressant: 0.2 percent of VISCOPLEX 1-300.
The preparation method comprises the following steps: mixing the base oil and the high-viscosity polyester, heating to 65 ℃, adding the pour point depressant, stirring and mixing uniformly, then sequentially adding the complexing agent and the base number reinforcing agent, continuously stirring and mixing uniformly, and finally adding the friction modifier, mixing and stirring uniformly.
The polyester Ketjenlube23000 in this example is from Italmatch Chemicals (Itemt Mach chemical Co., Ltd.) and has a viscosity of 3000mm 2 S; base oils Ultra-S4, Ultra-S6 were from the Korean S-Oil company; the engine complexing agent is gasoline engine oil complexing agent InfineumP5960 meeting API SP specification and is from Union of Runji of America; SAKURA-LUBE 525 is from Aidic family of Shanghai; PV611 is from Luoborun corporation; VISCOPLEX1-300 was from Woundplast corporation, Wingchun, Germany.
Comparative example 1
On the basis of example 1, the viscosity index improver was replaced with LZ 7077(OCP type viscosity index improver, from luborun, usa), and the other components and contents were unchanged.
Comparative example 2
On the basis of example 1, the viscosity index improver was replaced by SV261(HSD type viscosity index improver from luying british incorporated, usa), and the other components and contents were not changed.
Comparative example 3
The special oil for the commercial methanol engine.
Performance testing
(1) Stability test
The test method comprises the following steps: the samples of the examples and the comparative examples are respectively added with 5% of methanol, 0.5% of formic acid and 0.5% of water, fully stirred uniformly and then put into a 100mL thin-core tube, the tube is placed at 100 +/-1 ℃ for 96 +/-2 h, then the sediment at the bottom of the centrifuge tube is observed, and the volume is recorded to be accurate to 0.05 mL. The test results are shown in table 1 and fig. 1.
TABLE 1 stability test results
| Analysis item | Example 1 | Example 2 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Volume of precipitate/mL | 0 | 0 | 0.1 | 0.05 | 0.1 |
The data in table 1 and fig. 1 show that the precipitation does not occur in the stability tests in examples 1 and 2, and the precipitation occurs in different degrees in comparative examples 1 to 3, which shows that the precipitation problem occurring in the use process of the oil product can be solved in the embodiments of the present invention.
(2) Physical and chemical index test of methanol engine oil
The viscosity control verification method comprises the following steps: according to SH/T0192, the test conditions are 180 +/-1 ℃, 72 +/-0.5 h and 5L/h of air flow rate, 5% of methanol, 0.5% of formic acid and 0.5% of water are respectively added into samples of example 1, example 2 and comparative example 3, the mixture is fully stirred uniformly and then put into an aging tube for aging test, and the change rate of viscosity before and after the test is shown in Table 2.
The detergent dispersibility test method comprises: the SH/T0300 crankcase simulation test method is used for measuring the coke formation amount of oil products, and the test conditions are as follows: the oil temperature is 150 ℃, the aluminum plate is 320 ℃, the rotating speed is 1000r/min and 6h, and the jelly and pictures are shown in figure 2.
The abrasion resistance test method comprises the following steps: an anti-abrasion test of the oil product is carried out by adopting an SRV friction tester, the test conditions are that the load is 300N, the frequency is 50Hz, the stroke is 1mm, the temperature is 80 ℃, and the test results are shown in Table 2.
TABLE 2 physical and chemical index test results of methanol engine oil
| Test items | Example 1 | Example 2 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Kinematic viscosity (100 ℃) mm 2 /s | 9.766 | 10.18 | 11.06 | 11.11 | 9.849 |
| Kinematic viscosity (40 ℃), mm 2 /s | 54.69 | 56.22 | 64.18 | 64.03 | 59.04 |
| Viscosity index | 166 | 171 | 166 | 170 | 153 |
| Pour point, DEG C | -42 | -42 | -39 | -42 | -39 |
| Flash point, DEG C | 232 | 234 | 232 | 236 | 234 |
| CCS(-30℃)，mPa.s | 6018 | 6443 | 5932 | 6063 | 6296 |
| Base number, mgKOH/g | 9.52 | 8.71 | 9.54 | 8.73 | 8.53 |
| Sulfated ash content% | 0.68 | 0.73 | 0.68 | 0.73 | 0.78 |
| Aging test (viscosity Change Rate)% | +6 | +5 | +10 | +12 | +13 |
| Charring amount, mg | 25.3 | 21.3 | 42.5 | 46.3 | 76 |
| SRV abrasion spot diameter, mm | 0.45 | 0.44 | 0.45 | 0.46 | 0.51 |
It can be seen that in the viscosity change control scheme of the invention, in the examples 1 and 2 and the comparative example 3, the viscosity increase ratio of the examples 1 and 2 after the aging test is respectively 6% and 5%, and compared with the result of the comparative example 3, which is + 13%, the viscosity increase ratio is only about 1/2, and the examples 1 and 2 show better viscosity control advantages.
As can be seen, the coke formation results of example 1 and example 2 of the present invention were 25.3mg and 21.3mg in comparison with comparative example 3, respectively, and the viscosity growth of example 1 and example 2 was only about 1/3 in comparison with 76mg in comparison with comparative example 3, and thus example 1 and example 2 were excellent in detergency.
It can be seen that the wear-resistant performances are better when the wear-resistant performances are obtained when the diameters of the wear-resistant spots of the invention in example 1 and example 2 are respectively 0.45mm and 0.44mm smaller than that of the comparative example 3 in the diameter of 0.51 mm.
Claims (9)
1. The lubricating oil composition for the methanol engine is characterized by comprising 73.3-74.1 wt% of base oil, 10-15 wt% of high-viscosity metallocene PAO or polyester, 8.6-13.3 wt% of a complexing agent, 0.5-2.0 wt% of a base number reinforcing agent, and a friction modifier: 0.9-1.5 percent and 0.2-0.5 percent of pour point depressant, wherein the viscosity of the high-viscosity metallocene PAO or polyester is 300-3000 mm 2 (ii) a metallocene PAO or polyester; the base oil is a group II and/or group III base oil.
2. The lubricating oil composition of claim 1, wherein the metallocene PAO is mPAO 300.
3. The lubricating oil composition of claim 1, wherein the polyester is Ketjenlube 23000.
4. The lubricating oil composition of claim 1, wherein the base number strengthening agent is a mixture of calcium overbased sulfurized alkyl phenate and magnesium salicylate or methylpiperidin-4-yl dodecanoate.
5. The lubricating oil composition according to claim 1, wherein the friction modifier is a mixture of glycerol monooleate and an oil-soluble molybdenum dialkyldithiocarbamate in a mass ratio of 1:0.3 to 0.5.
6. The lubricating oil composition of claim 1, wherein the group II base oil is 150N and the group iii base oil is Ultra-S4 or Ultra-S6.
7. The lubricating oil composition of claim 1, wherein the pour point depressant is a polymethacrylate.
8. The lubricating oil composition of claim 1, wherein the package additive is a gasoline engine package having low ash.
9. A preparation method of the lubricating oil composition according to any one of claims 1 to 8, characterized by mixing base oil and high-viscosity metallocene PAO or polyester, heating to 55-65 ℃, adding a pour point depressant, stirring and mixing uniformly, then sequentially adding a complexing agent and a base number reinforcing agent, continuously stirring and mixing uniformly, and finally adding a friction modifier, and mixing and stirring uniformly.
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Cited By (1)
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