CN114426896B - Lubricating oil composition for diesel engine and preparation method thereof - Google Patents
Lubricating oil composition for diesel engine and preparation method thereof Download PDFInfo
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- CN114426896B CN114426896B CN202011180149.4A CN202011180149A CN114426896B CN 114426896 B CN114426896 B CN 114426896B CN 202011180149 A CN202011180149 A CN 202011180149A CN 114426896 B CN114426896 B CN 114426896B
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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
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
- C10M105/32—Esters
- C10M105/42—Complex esters, i.e. compounds containing at least three esterified carboxyl groups and derived from the combination of at least three different types of the following five types of compound: monohydroxy compounds, polyhydroxy compounds, monocarboxylic acids, polycarboxylic acids and hydroxy carboxylic acids
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- 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
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- 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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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
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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
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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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
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/0206—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers used as base material
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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
- C10M2205/02—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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- 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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- 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
- C10M2207/26—Overbased carboxylic acid salts
- C10M2207/262—Overbased carboxylic acid salts derived from hydroxy substituted aromatic acids, e.g. salicylates
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- 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
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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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/30—Complex esters, i.e. compounds containing at leasst three esterified carboxyl groups and derived from the combination of at least three different types of the following five types of compounds: monohydroxyl compounds, polyhydroxy xompounds, monocarboxylic acids, polycarboxylic acids or hydroxy carboxylic acids
- C10M2207/301—Complex esters, i.e. compounds containing at leasst three esterified carboxyl groups and derived from the combination of at least three different types of the following five types of compounds: monohydroxyl compounds, polyhydroxy xompounds, monocarboxylic acids, polycarboxylic acids or hydroxy carboxylic acids used as base material
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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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- 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
- C10M2215/28—Amides; Imides
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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
- C10M2219/02—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
- C10M2219/08—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
- C10M2219/088—Neutral salts
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- 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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- 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
- C10M2227/06—Organic compounds derived from inorganic acids or metal salts
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Abstract
The invention provides a lubricating oil composition for a diesel engine and a preparation method thereof. The lubricating oil composition for diesel engines of the present invention comprises: (A) an ester compound; (B) a viscosity index improver; (C) a dispersant; (D) a detergent; (E) zinc dialkyldithiophosphates; (F) an antioxidant; (G) ashless friction modifiers; (H) a lubricant base oil; the structure of the ester compound is as follows: L-O-L' -O-L (I) wherein each group is defined in the specification. The lubricating oil composition for the diesel engine has excellent high-temperature detergency and oil sludge dispersion performance, and can meet the requirements of CK-4 and FA-4 grade high-grade diesel engine lubricating oil.
Description
Technical Field
The invention relates to the field of lubricating oil, in particular to a lubricating oil composition for a diesel engine and a preparation method thereof.
Background
The requirements of environmental protection and energy conservation promote the development of engine technology and the continuous upgrading and updating of diesel engine oil, and the performance requirements of the oil product in the aspects of high-temperature cleaning, dispersion, low temperature, oxidation resistance, friction reduction, wear resistance and the like are higher and higher. In recent 20 years, the specifications of diesel engine oil products are gradually upgraded from CH-4 to CI-4 and CJ-4 and the latest CK-4 and FA-4 specifications, and the specifications of CK-4/FA-4 which are produced in 2016 require that 2 of 9 engine tests which oil products pass through relate to piston detergency and are respectively C13 and 1N; starting from CH-4, the API Diesel engine oil specification requires an assessment of high temperature sludge dispersancy in addition to soot dispersancy, and sludge scoring and oil filter differential pressure measurements are performed in M-11 and later M-11EGR and ISM engine tests, relating to sludge dispersancy.
Ester oils are a widely used base oil for synthetic lubricating oils, are organic esters having a predetermined molecular structure produced by the reaction of various alcohols and acids, have a high viscosity index, and do not contain unstable impurities contained in common mineral oils. The ester bond in the ester molecule endows the ester molecule with polarity, thereby endowing ester oil with various incomparable performance and application characteristics. For this reason, many base oils and additives of ester structure have been developed in the prior art.
US 6051539 reports the improvement of antioxidant and low temperature properties of vegetable oils by modifying the structure of the fatty side chain in the triglyceride structure of vegetable oils, comprising a two-step reaction: (1) The isomeric fatty acid and methanol or polyol containing branched chain are subjected to esterification reaction to generate branched chain fatty acid methyl ester or polyol ester; (2) The branched fatty acid methyl ester or polyol ester and triglyceride are subjected to transesterification reaction under the action of a catalyst to generate triglyceride partially substituted by branched fatty acid and polyol ester partially substituted by long-chain fatty acid.
Although the existing ester base oil and additives can improve the environmental friendliness of the lubricating oil, there is still much room for improvement. With the development of environment-friendly lubricating oil, higher requirements are also put forward on the performance of ester base oil and additives. In view of this, there is still a need in the art for more excellent environmentally friendly base oils and additives.
The ester oil is used as base oil to prepare semisynthetic or fully synthetic engine oil, so that the oil has excellent performance to meet the harsh requirements of modern automotive lubricants, and the development target of people in the field is still maintained.
Disclosure of Invention
The invention provides a lubricating oil composition for a diesel engine and a preparation method thereof.
The diesel engine lubricating oil composition of the present invention comprises: (A) an ester compound; (B) a viscosity index improver; (C) a dispersant; (D) a detergent; (E) zinc dialkyldithiophosphates; (F) an antioxidant; (G) ashless friction modifiers; (H) a lubricant base oil; the structure of the ester compound is as follows:
L-O-L'-O-L (I)
wherein the L' group is C 2～100 Alkylene (preferably C) 2～50 Straight or branched alkylene of (2), more preferably C 2～20 Linear or branched alkylene groups of (a);
wherein each L group is independently selected from the group represented by formula (II),
in formula (II), m is an integer of 1 to 10 (preferably an integer of 1 to 6, more preferably an integer of 1 to 5); m + 1R groups, equal to or different from each other, are each independently selected from the group consisting of a single bond, C 1-10 Alkylene (preferably C) 1-5 Straight or branched alkylene, more preferably C 1-3 Straight or branched chain alkylene); r 0 The groups are the same or different from each other and are independently selected from H and C 1-10 Hydrocarbyl (preferably C) 1-5 Straight or branched alkyl, more preferably C 1-3 Straight or branched chain alkyl); m a groups, equal to or different from each other, are each independently selected from the group represented by formula (III), -C = C-, a single bond, a methylene group and an ethylene group, and at least one a group is selected from the group represented by formula (III);
in the formula (III), R 0 The group being selected from C 1-17 Hydrocarbyl (preferably C) 1-15 Straight or branched alkyl, more preferably C 1-11 Straight or branched chain alkyl).
Examples of the ester compounds of specific structures of the present invention include:
according to the present invention, the method for preparing the ester compound comprises the step of reacting a compound represented by formula (α) with a compound represented by formula (β),
HO-L'OH (α)，
in formula (. Alpha.), the L' group is C 2～100 Alkylene (preferably C) 2～50 Straight or branched alkylene of (2), more preferably C 2～20 Linear or branched alkylene groups of (a);
in the formula (. Beta.), m is an integer of 1 to 10 (preferably an integer of 1 to 6, more preferably an integer of 1 to 5); m + 1R groups, equal to or different from each other, are each independently selected from the group consisting of a single bond, C 1-10 Alkylene (preferably C) 1-5 Straight or branched alkylene, more preferably C 1-3 Linear or branched alkylene); r 0 The groups are the same or different from each other and are independently selected from H and C 1-10 Hydrocarbyl (preferably C) 1-5 Straight or branched alkyl, more preferably C 1-3 Straight or branched chain alkyl); the Y group is selected from H, F, cl, br and I; m A groups, equal to or different from each other, are each independently selected from the group represented by formula (gamma), -C = C-, monoA bond, a methylene group and an ethylene group, and at least one A group is selected from the group represented by formula (. Gamma.);
in the formula (. Gamma.), R 0 ' selected from C 1-17 Hydrocarbyl (preferably C) 1-15 Straight or branched alkyl, more preferably C 1-11 Straight or branched chain alkyl).
According to the invention, the compound of formula (α) may be selected from one or more of the following specific compounds: ethylene glycol, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, heptylene glycol, octylene glycol, nonylene glycol, decylene glycol, undecylene glycol, dodecylene glycol, tridecylene glycol, tetradecylene glycol, pentadecylene glycol.
According to the invention, alternatively, the compound represented by the formula (. Beta.) can be obtained by reacting a compound represented by the formula (. Delta.) with a compound represented by the formula (. Epsilon.),
R′ 0 -COOH (ε)
in formula (δ), m is an integer of 1 to 10 (preferably an integer of 1 to 6, more preferably an integer of 1 to 5); m + 1R groups, equal to or different from each other, are each independently selected from the group consisting of a single bond, C 1-10 Alkylene (preferably C) 1-5 Straight or branched alkylene, more preferably C 1-3 Linear or branched alkylene); r is 0 The groups are the same or different from each other and are independently selected from H and C 1-10 Hydrocarbyl (preferably C) 1-5 Straight or branched alkyl, more preferably C 1-3 Straight or branched chain alkyl); the Y group is selected from H, F, cl, br and I; m a 'groups, equal to or different from each other, are each independently selected from-C = C-, a single bond, a methylene group, an ethylene group, and at least one a' group is-C = C-; in the formula (. Epsilon.), R 0 The group being selected from C 1-17 Hydrocarbyl (preferably C) 1-15 Straight or branched alkyl, more preferably C 1-11 Straight or branched chain alkyl).
According to the invention, the reaction equivalence ratio between the compound of formula (δ) (calculated as-C = C-) and the compound of formula (∈) (calculated as carboxyl group) is preferably 0.05 to 20:1, more preferably 0.1 to 10:1; the temperature of the reaction is preferably 0 to 200 ℃, and more preferably 50 to 160 ℃; the reaction time is preferably 0.5 to 72 hours, more preferably 3 to 48 hours.
According to the present invention, a solvent may or may not be added, preferably a solvent is added, in the reaction of the compound represented by the formula (δ) and the compound represented by the formula (ε). The solvent is preferably a hydrocarbon solvent, preferably one or more of alkane, aromatic hydrocarbon and ether, more preferably an alkane solvent, and for example, one or more of hexane, heptane, octane, nonane, decane, cyclohexane, cycloheptane, cyclooctane, cyclononane, cyclodecane, benzene, toluene, xylene, ethylbenzene, propylbenzene, diethyl ether, propyl ether, isopropyl ether and butyl ether may be used. The amount of the solvent to be added is not particularly limited, as long as the reaction is promoted to proceed smoothly.
According to the present invention, a catalyst may or may not be added to the reaction of the compound represented by the formula (. Delta.) with the compound represented by the formula (. Epsilon.). The catalyst can be one or more of inorganic acid, organic acid, solid acid, heteropoly acid, acidic ionic liquid, acidic resin, acidic molecular sieve, metal chloride and metal oxide, for example, sulfuric acid, perchloric acid, alCl can be selected 3 One or more of tin chloride, n-butyl tin oxide, dibutyl tin oxide, p-toluenesulfonic acid, acidic resins, phosphotungstic heteropoly acids, acidic ionic liquids and acidic molecular sieves, preferably one or more of perchloric acid, tin chloride, n-butyl tin oxide, p-toluenesulfonic acid, acidic resins and phosphotungstic heteropoly acids. The amount of the catalyst to be added is preferably 0.1 to 10% by mass based on the compound represented by the formula (δ).
According to the invention, the compound represented by the formula (δ) may be selected from one or more of the following specific compounds: eicosenoic acid, oleic acid, linoleic acid, linolenic acid, hexadecenoic acid, tetradecenoic acid, dodecenoic acid, undecenoic acid, decenoic acid, octenoic acid.
According to the invention, the compound of formula (ε) may be selected from one or more of the following specific compounds: formic acid, acetic acid, propionic acid, butyric acid, valeric acid, caproic acid, caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, eicosenoic acid, oleic acid, linoleic acid, linolenic acid, hexadecenoic acid, arachidonic acid, dodecenoic acid, undecylenic acid, decenoic acid, octenoic acid.
According to the invention, the reaction equivalence ratio between the compound of formula (α) (calculated as OH) and the compound of formula (β) (calculated as Y) is preferably 0.1 to 10:1, more preferably 0.2 to 5:1; the reaction temperature is preferably 70-250 ℃, and more preferably 90-200 ℃; the reaction time is preferably 0.5 to 24 hours, more preferably 2 to 15 hours.
According to the present invention, a solvent may be added or may not be added, preferably a solvent is added in the reaction of the compound represented by the formula (α) and the compound represented by the formula (β). The solvent is preferably a hydrocarbon solvent, preferably one or more of alkane, aromatic hydrocarbon and ether, more preferably an alkane solvent, and for example, one or more of hexane, heptane, octane, nonane, decane, cyclohexane, cycloheptane, cyclooctane, cyclononane, cyclodecane, benzene, toluene, xylene, ethylbenzene, propylbenzene, diethyl ether, propyl ether, isopropyl ether and dibutyl ether may be used. The amount of the solvent to be added is not particularly limited, and is preferably such that the reaction is smoothly progressed. The solvent can also play a role of a water carrying agent so as to promote the smooth proceeding of the reaction.
According to the present invention, a catalyst may or may not be added in the reaction of the compound represented by the formula (α) and the compound represented by the formula (β). The catalyst can be one or more of inorganic acid, organic acid, solid acid, heteropoly acid, acidic ionic liquid, acidic resin, acidic molecular sieve, metal chloride and metal oxide, for example, sulfuric acid, perchloric acid, alCl can be selected 3 One or more of stannic chloride, n-butyl tin oxide, dibutyl tin oxide, p-toluenesulfonic acid, acidic resin, phosphotungstic heteropoly acid, acidic ionic liquid and acidic molecular sieve, preferably sulfuric acid, tin chloride,One or more of n-butyl tin oxide, p-toluenesulfonic acid, acidic resin and phosphotungstic heteropoly acid. The amount of the catalyst to be added is preferably 0.1 to 10% by mass based on the compound represented by the formula (. Beta.). The catalyst may be removed by a method known in the art (e.g., a method of alkali washing and water washing), and is not particularly limited.
According to the present invention, in the reaction of the compound represented by the formula (α) and the compound represented by the formula (β), the reaction product is preferably washed and purified with a solvent, and the solvent which can be washed is preferably a hydrocarbon solvent. The solvent may be removed by conventional techniques such as drying, evaporation, distillation, and the like.
According to the present invention, the reaction of the compound represented by the formula (. Alpha.) with the compound represented by the formula (. Beta.) may be carried out in a continuous or batch reaction apparatus such as a reaction vessel, a fixed bed, a fluidized bed, a microchannel reactor, etc.
According to the invention, the ester compound accounts for 1-50% (preferably 2-40%) of the total mass of the lubricating oil composition; the viscosity index improver accounts for 1-15% (preferably 2-12%) of the total mass of the lubricating oil composition; the dispersant accounts for 1 to 15 percent (preferably 2 to 12 percent) of the total mass of the lubricating oil composition; the detergent accounts for 0.5 to 10 percent (preferably 2 to 8 percent) of the total mass of the lubricating oil composition; the zinc dialkyl dithiophosphate accounts for 0.1 to 3 percent (preferably 0.5 to 2 percent) of the total mass of the lubricating oil composition; the antioxidant accounts for 0.1 to 6 percent (preferably 0.2 to 5 percent) of the total mass of the lubricating oil composition; the ashless friction modifier accounts for 0.02-3% (preferably 0.1-2.5%) of the total mass of the lubricating oil composition; the lubricating oil base oil accounts for 3-96% (preferably 20-91%) of the total mass of the lubricating oil composition.
According to the present invention, preferably, the viscosity index improver is selected from the group consisting of ethylene propylene copolymers, polymethacrylates, polyalkylmethacrylates, methacrylate copolymers, copolymers of styrene and acrylates, hydrogenated or partially hydrogenated copolymers of styrene/isoprene, hydrogenated or partially hydrogenated copolymers of styrene/butadiene, hydrogenated or partially hydrogenated copolymers of isoprene/butadiene; the dispersant is selected from the group consisting of a homopolymerOne or more of isobutylene succinimide, di-polyisobutylene succinimide, high molecular polyisobutylene succinimide, boronized polyisobutylene succinimide and polyisobutylene succinate; the detergent is selected from one or more of a sulphonate, an alkyl salicylate and a sulphurised alkyl phenate; the alkyl group in the zinc dialkyl dithiophosphate is C 2 -C 12 Alkyl groups of (a); the antioxidant is selected from one or more of phenol type antioxidant, amine type antioxidant, phenolic ester type antioxidant and sulfophenolic ester type antioxidant; the ashless friction modifier is selected from one or more of fatty acid polyol esters, fatty amines and fatty amides; the lubricating oil base oil is selected from one or more of API I base oil, II base oil, III base oil, IV base oil and V base oil.
According to the invention, the viscosity index improver may be selected from the commercial grades LZ7070, LZ7065, LZ7067, LZ7077 from Lubrizol, SV260, SV261 from infinium, and the like.
According to the invention, the dispersant comprises Polyisobutylene (PIB) with a number average molecular weight of 500-4000, preferably 700-3000, and most preferably 1000-2400, the boronated polyisobutylene succinimide contains 0.1-3%, preferably 0.2-2.5% of boron, one or more of polyisobutylene succinic acid ester such as pentaerythritol ester, polyisobutylene succinic acid glyceride and polyisobutylene succinic acid ethylene glycol ester, T151, T152 from south-oil-free additive Limited, T161 from Suzhou special oil factory, T155, T161A, T161B from additives factory of Jinzhou petrochemical company, LZL 57 from Lobol blue additive Limited, LZ6418, LZ6420 from Lobol company, hitec646 from Yakunton company, MX Petroli 6 from Yakunton company, hitec648 from Yakunton company, hitec7714 from Hitec7714, LZ935, and LZ935, 935 from LZ935 and ethylene glycol 935 from LZ 935.
According to the invention, the detergent is preferably a mixture of alkylsalicylate and sulfurized alkylphenate, most preferably a mixture of calcium alkylsalicylate and calcium sulfurized alkylphenate, the preferred mass ratio between them being 0.2:1 to 4:1, the detergent may be T106B and T122 produced by Ryofeng chemical company, inc., LZL109B, LZL112, LZL115A, LZL115B produced by Lubrizol additives, inc., LZ6499, LZ6500, LZ6477C, LZ6478 produced by Afton, E611 produced by Afton, OLOA219 produced by Chevron Oronite, C9375, C9012, C9391, C9330, C9394 produced by Infineum, OSCA420 produced by OSCA, and SAP007 produced by Shell.
According to the invention, the alkyl group in the zinc dialkyldithiophosphate is preferably C 2 -C 8 Including, but not limited to, one or more of ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, n-pentyl, isopentyl, n-hexyl, isohexyl, n-octyl, 2-ethylhexyl, cyclohexyl, and methylcyclopentyl. The zinc dialkyldithiophosphate may be selected from T202 and T203 produced by Wuxi south petroleum additive Co., ltd, T202 and T203 produced by additive plant of Kanzhou petrochemical company, primary-secondary alkyl T204 and secondary alkyl T205, LZ1371 and LZ1375 produced by Lubrizol corporation, C9417, C9425 and C9426 produced by Infineum corporation, hitec7169 and Hitec1656 produced by Afton company, and the like.
According to the present invention, the phenolic antioxidant may be one or more selected from 2, 6-di-t-butyl-alpha-dimethylamino-p-cresol, 2, 6-di-t-butyl-p-cresol, 4-methylenebis (2, 6-di-t-butylphenol), and 2, 6-di-t-butyl-4-alkoxyphenol. The amine-type antioxidant may be one or more of alkylated aniline, alkylated diphenylamine and phenyl alpha-naphthylamine, preferably oil-soluble dialkyl diphenylamine, for example dibutyl diphenylamine, dioctyl diphenylamine, dinonyl diphenylamine, butyl octyl diphenylamine, phenyl naphthylamine. The commercially available alkylated diphenylamine can be selected from IRGANOX L-01 and IRGANOX L-57 produced by BASF corporation, beijing, xingpo fine chemical engineering development company, LZ5150A produced by Lumboro additive Co., ltd., lanzhou, vaNLUBE NA, VANLUBE 961 and Dioctyldiphenylamine VANLUBE 81 produced by R.T. Vanderbilt corporation, P-di-isooctyldiphenylamine RC7001 produced by Rhein Chemie corporation, germany, and L438L produced by Chemtura corporation. The phenolic ester antioxidant is preferably hydroxy phenyl carboxylic ester with molecular weight of 200-500, such as IRGANOX L-135 from BASF corporation in Germany and T512 from Fine chemical engineering technology development corporation in Beijing Xingpo. The thiophenol ester antioxidant can be 2,2' -thiobis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate ], such as antioxidant 1035 produced by Sichuan Yongyu chemical Co., ltd, IRGANOX L115 produced by BASF Co., ltd, and T535 produced by Xinxiangruifeng new materials Co., ltd. The antioxidant preferably comprises a composite antioxidant of alkylated diphenylamine and thiophenol ester, wherein the alkylated diphenylamine accounts for 50-95% of the total mass of the composite antioxidant, preferably 60-90%, and the thiophenol ester type antioxidant accounts for 5-50% of the total mass of the composite antioxidant, preferably 10-40%.
According to the present invention, the ashless friction modifier may be selected from one or more of fatty acid polyol esters, aliphatic amines and aliphatic amides, wherein the aliphatic hydrocarbon group is a saturated or unsaturated hydrocarbon group having between 6 and 60 carbon atoms, preferably between 10 and 50 carbon atoms. The fatty acid polyol ester comprises mono-ester, di-ester or multi-ester of compounds such as fatty acid glyceride, fatty acid pentaerythritol ester, fatty acid glycol ester, fatty acid succinate, fatty acid ethanolamine ester, fatty acid diethanolamine ester, fatty acid triethanolamine ester, such as glycerol monooleate, stearic acid monopentaerythritol ester, lauric acid glycol diester, oleic acid diethanolamine monoester, oleic acid triethanolamine monoester, etc.; the aliphatic amines include hydrocarbyl-substituted mono-or polyamines, alkoxylated hydrocarbyl-substituted mono-or polyamines, and alkyl ether amines, and the like, such as ethoxylated tallow amine and ethoxylated tallow ether amine; examples of the aliphatic amide include oleic acid amide, coconut oil amide, oleic acid diethanol amide and the like. As the ashless friction modifier, F10 available from Basff, germany, ATMER1006 available from Croda, etc. can be used.
According to the invention, the lubricant base oil is preferably one or more of API group II base oil, API group III base oil and API group IV base oil, and for example, one or more of HVIII 6, HVIII 10, HVIII 6, III Yubase 6 of SK, II J500 of Mobil, IV PAO6 and PAO8 of China petrochemical can be selected.
A pour point depressant optionally having an alkyl group of C may be optionally added to the lubricating oil composition of the present invention 2 -C 18 Dialkyl fumarate/vinyl acetate copolymers, polyalkylmethacrylates, and the like, and the commercially available products include T803, VX385 and the like. The amount of the pour point depressant to be added is not particularly limited, as is known in the art.
The method of preparing a lubricating oil composition for a diesel engine of the present invention comprises the step of mixing the components of the lubricating oil composition of any of the preceding aspects. The mixing temperature is preferably between 40 ℃ and 90 ℃ and the mixing time is preferably between 1 and 6 hours.
The lubricating oil composition for the diesel engine has excellent high-temperature detergency and oil sludge dispersion performance, and can meet the requirements of CK-4 and FA-4 grade high-grade diesel engine lubricating oil.
Detailed Description
In the context of the present specification, the term "single bond" is sometimes used in the definition of a group. By "single bond", it is meant that the group is absent. For example, assume the formula-CH 2 -A-CH 3 Wherein the group a is defined as being selected from the group consisting of a single bond and a methyl group. In this connection, if A is a single bond, this means that the group A is absent, in which case the formula is correspondingly simplified to-CH 2 -CH 3 。
In the context of the present specification, the expression "number + valence + group" or the like refers to a group obtained by removing the number of hydrogen atoms represented by the number from the basic structure (such as a chain, a ring, a combination thereof, or the like) to which the group corresponds, and preferably refers to a group obtained by removing the number of hydrogen atoms represented by the number from a carbon atom (preferably a saturated carbon atom and/or a non-identical carbon atom) contained in the structure. For example, "3-valent straight or branched alkyl" refers to a group obtained by removing 3 hydrogen atoms from a straight or branched alkane (i.e., the base chain to which the straight or branched alkyl corresponds), and "2-valent straight or branched heteroalkyl" refers to a group obtained by removing 3 hydrogen atoms from a straight or branched alkaneA group obtained by removing 2 hydrogen atoms from a catenane (preferably from the carbon atoms contained in the heteroalkane, or further, from non-identical carbon atoms). For example, the 2-valent propyl group may be-CH 2 -CH 2 -CH 2 -*、
The 3-valent propyl group may be
The 4-valent propyl group may be
Wherein x represents a binding end in the group that may be bonded to other groups.
The invention is further illustrated by the following specific examples, without being limited thereto.
Example 1: preparation of isomeric acids A
The reaction is carried out in a high-pressure reaction kettle provided with a vent, a stirrer, a thermocouple and a thermocouple. 565g of oleic acid was gradually pumped into a reaction vessel containing 1000g of acetic acid and 10g of 70% perchloric acid, reacted at 70 ℃ for 24 hours, heating was stopped, the reaction was completed, the remaining acetic acid was removed by distillation, cooled to room temperature, washed with alkali, washed with water and the organic phase with potassium dihydrogen phosphate having a pH =3.7 three times, dried over anhydrous sodium sulfate, filtered, and the unreacted oleic acid was removed by molecular distillation to obtain acetic acid-oleic acid addition product, i.e., an isomeric acid a, the structure of which is shown below.
Example 2: preparation of ester Compound A-1
171g of isoacid A, 15.5g of glycol, 1.3g of concentrated sulfuric acid catalyst and a water carrying agent (petroleum ether at the temperature of 90-120 ℃) are added into a 500mL three-neck glass flask, heated to the reflux temperature, and H generated in the reaction process is collected by a water separator 2 O, waiting for the actual water yield and the theoretical valueAt the same time, the reaction was stopped. And (3) washing the crude product with alkali to remove the catalyst, washing with water to neutrality, and removing the reaction solvent to obtain the ester compound A-1.
Example 3: preparation of ester Compound A-2
171g of isoacid A, 30g of hexanediol, 2g of concentrated sulfuric acid catalyst and a water carrying agent (petroleum ether at 90-120 ℃) are added into a 500mL three-neck glass flask, the flask is heated to the reflux temperature, and H generated in the reaction process is collected by a water separator 2 And O, stopping the reaction until the actual water yield is the same as the theoretical value. And (3) washing the crude product with alkali to remove the catalyst, washing with water to neutrality, and removing the reaction solvent to obtain the ester compound A-2.
Comparative example 1: preparation of ester Compound D-1
The preparation method of D-1 is the same as that of A-1 except that the isomeric acid A is replaced by equimolar oleic acid, and the ester compound D-1 is obtained.
Comparative example 2: preparation of ester Compound D-2
The preparation method of D-2 is the same as that of A-1 except that the ethylene glycol is replaced by the glycerol with the same mole, and the ester compound D-2 is obtained.
Example 4: preparation of isomeric acids B
The method comprises the following steps of filling 10g of HCl-washed strong-acid ion exchange resin in a fixed bed reactor, controlling the temperature of the reactor at 60 ℃, preheating weighed hexadecenoic acid and caproic acid (molar ratio of 1 to 20) to the same temperature, and pumping the preheated hexadecenoic acid and caproic acid into the reactor, wherein the space velocity is 0.4h -1 Collecting effluent product, primarily distilling to remove residual caproic acid, and further distilling by molecular distillation to remove unreacted hexadecenoic acid to obtain caproic acid-hexadecenoic acid addition product isomeric acid B, the structure of which is shown below.
Example 5: preparation of ester Compound B-1
370g of isoacid B, 90g of decanediol, 3g of concentrated sulfuric acid catalyst and a water carrying agent (petroleum ether at 90-120 ℃) are added into a 1000mL three-neck glass flask and heated to reflux temperatureAnd H generated in the reaction process is collected by a water separator 2 And O, stopping the reaction until the actual water yield is the same as the theoretical value. And (3) washing the crude product with alkali to remove the catalyst, washing with water to neutrality, and removing the reaction solvent to obtain the ester compound B-1.
Example 6: preparation of ester Compound B-2
370g of isoacid B, 45g of butanediol, 3g of concentrated sulfuric acid catalyst and a water carrying agent (petroleum ether at 90-120 ℃) are added into a 1000mL three-neck glass flask, the flask is heated to the reflux temperature, and a water separator is used for collecting H generated in the reaction process 2 And O, stopping the reaction until the actual water yield is the same as the theoretical value. And (3) washing the crude product with alkali to remove the catalyst, washing with water to neutrality, and removing the reaction solvent to obtain the ester compound B-2.
Comparative example 3: preparation of ester Compound D-3
The preparation method of D-3 is the same as that of B-2 except that the isomeric acid B is replaced by the same mole of palmitic acid, and the ester compound D-3 is obtained.
The physicochemical properties of the ester compounds A-1, A-2, D-1, D-2, B-1, B-2 and D-3 are examined, the measuring methods are GB/T265 petroleum product kinematic viscosity measuring method and dynamic viscometer algorithm, GB/T1995 petroleum product viscosity index calculating method, GB/T3535 petroleum product pour point measuring method, SH/T0074 gasoline engine oil thin layer oxygen absorption oxidation stability testing method, and the measuring results are shown in Table 1.
TABLE 1
Example 7: preparation of the Iso acid C
The reaction was carried out in a high pressure autoclave equipped with a vent, stirrer and thermocouple. Pumping 280g of linoleic acid into a reaction kettle containing 600g of acetic acid and 5g of perchloric acid with the concentration of 70%, reacting at 70 ℃ for 18 hours, stopping heating, finishing the reaction, cutting off the residual acetic acid by adopting a distillation mode, cooling to room temperature, washing with alkali, washing with water, washing an organic phase with potassium dihydrogen phosphate with the pH =3.7 for three times, drying with anhydrous sodium sulfate, filtering, and finally cutting off unreacted linoleic acid by molecular distillation to obtain an addition product, namely an isomerized acid C of acetic acid and linoleic acid, wherein the structure of the addition product is shown as the following.
Example 8: preparation of ester compound C-1
Adding 81g of isoacid C, 12g of hexanediol, 1.4g of concentrated sulfuric acid catalyst and a water carrying agent (petroleum ether at 90-120 ℃) into a 500mL three-neck glass flask, heating to the reflux temperature, and collecting H generated in the reaction process by using a water separator 2 And O, stopping the reaction until the actual water yield is the same as the theoretical value. And (3) washing the crude product with alkali to remove the catalyst, washing with water to neutrality, and removing the reaction solvent to obtain the ester compound C-1.
Comparative example 4: preparation of ester Compound D-4
The preparation method of the D-4 is the same as that of the C-1 except that the isoacid C is replaced by linoleic acid with the same mole, and the ester compound D-4 is obtained.
Example 9: preparation of the isomeric acids E
The method comprises the steps of loading 10g of HCl-washed strong-acid ion exchange resin into a fixed bed reactor, controlling the temperature of the reactor at 65 ℃, preheating weighed linoleic acid, caproic acid and butyric acid (molar ratio is 1: 5) -1 Collecting effluent products, preliminarily distilling to remove residual caproic acid and butyric acid, and further distilling by molecular distillation to remove unreacted linoleic acid to obtain an addition product of caproic acid and butyric acid-oleic acid, namely an isomerized acid E, the structure of which is shown in the specification.
Example 10: preparation of ester Compound E-1
242g of isoacid E, 44g of decanediol, 4.5g of concentrated sulfuric acid catalyst and a water carrying agent (petroleum ether at 90-120 ℃) are added into a 500mL three-neck glass flask, heated to the reflux temperature, and a water separator is used for collecting H generated in the reaction process 2 And O, stopping the reaction until the actual water yield is the same as the theoretical value. And (3) washing the crude product with alkali to remove the catalyst, washing with water to neutrality, and removing the reaction solvent to obtain the ester compound E-1.
Example 11: preparation of ester Compound E-2
242g of isoacid E, 22.5g of butanediol, 4.4g of concentrated sulfuric acid catalyst and a water carrying agent (petroleum ether at the temperature of 90-120 ℃) are added into a 1000mL three-neck glass flask, the flask is heated to the reflux temperature, and a water separator is utilized to collect H generated in the reaction process 2 And O, stopping the reaction until the actual water yield is the same as the theoretical value. And (3) washing the crude product with alkali to remove the catalyst, washing with water to neutrality, and removing the reaction solvent to obtain the ester compound E-2.
The physical and chemical properties of the ester compounds C-1, D-4, E-1 and E-2 are examined, and the measurement results are shown in Table 2.
TABLE 2
Examples 12-18 and comparative examples 5-8 of lubricating oil compositions for Diesel engines
The formulations of examples 12-18 and comparative examples 5-8 of the lubricating oil composition for diesel engines are shown in tables 3 and 4, and the preparation method comprises the steps of adding the components into a mixing container respectively, stirring for 1-2 hours at 45-80 ℃, and preparing the CK-4 lubricating oil composition for diesel engines with the viscosity grade of 10W-30.
The sources of the main additives and base oils used in the examples and comparative examples are shown in table 5.
TABLE 3
TABLE 4
The high-temperature cleaning performance of the oil is inspected by a coke-forming plate test, the equipment adopted by the coke-forming plate test is a 25B-19N coke-forming plate instrument produced by Meitech company of Japan, and the test is a process for simulating the working conditions of the lubricating oil circulation of an engine crankcase and a cylinder sleeve piston ring so that the tested oil is continuously subjected to thermal oxidation and coking. The test time is 1h, the oil temperature is 100 ℃, the plate temperature is 320 ℃, and the lower the coke weight is, the better the detergency of the oil is.
A spot test is adopted to evaluate the oil sludge dispersion performance of the oil product, 0.5g of oil sludge is added into 3.5g of test oil, the oil sludge is dispersed and mixed through ultrasound for 2min, a test sample is placed in an oven and aged for 2h at 200 ℃, then the aged mixed liquid is dropped on filter paper, the diameter of an oil spot diffusion ring and the diameter of an oil ring are measured after 24h, the ratio of the diameter to the diameter of the oil spot diffusion ring is a dispersion index, the dispersion index serves as a parameter index for evaluating the oil sludge dispersion performance, and the larger the dispersion index is, the better the oil sludge dispersion is.
The results of the coke-forming test and the spotting test are shown in Table 6, and it is understood from Table 6 that the lubricating oil composition of the present invention has excellent high-temperature detergency and sludge dispersibility.
TABLE 5
| Name code number | Source |
| Ethylene-propylene copolymer finger-sticking agent LZ7077 | Lubrizol Ltd |
| High molecular polyisobutylene succinimide T161 | Wuxi South Petroleum Additive Co.,Ltd. |
| Boronized polyisobutylene succinimide MX3316 | Agip Petroli Co Ltd |
| High base number calcium salicylate T109B | Wuxi South Petroleum Additive Co.,Ltd. |
| Sulfurized calcium alkyl phenolate T121 with medium base number | New materials of Xinxiangruifeng GmbH |
| Zinc butyloctyl dithiophosphate T202 | Wuxi South Petroleum Additive Co.,Ltd. |
| Zinc dioctyldithiophosphate T203 | Wuxi South Petroleum Additive Co.,Ltd. |
| Alkylated diphenylamine 438L | Chemtura Corp Ltd |
| Thiophenol ester T535 | New materials of Xinxiangruifeng GmbH |
| Glycerol monooleate ATMER1006 | Croda Corp Ltd |
| Class II 10 | China Petroleum & Chemical Corporation |
| Class II 6 | China Petroleum & Chemical Corporation |
| PAO 6 | Mobil Corp Ltd |
TABLE 6
| Oil sample | Coke weight/mg in coke forming plate test | Oil sludge dispersion index |
| Example 12 | 28.2 | 0.86 |
| Example 13 | 26.5 | 0.88 |
| Example 14 | 34.5 | 0.84 |
| Example 15 | 30.0 | 0.85 |
| Example 16 | 40.7 | 0.82 |
| Example 17 | 46.0 | 0.79 |
| Example 18 | 45.4 | 0.78 |
| Comparative example 5 | 64.3 | 0.66 |
| Comparative example 6 | 96.4 | 0.69 |
| Comparative example 7 | 67.5 | 0.72 |
| Comparative example 8 | 67.4 | 0.70 |
Claims (11)
1. A diesel engine lubricating oil composition comprising: (A) an ester compound; (B) a viscosity index improver; (C) a dispersant; (D) a detergent; (E) zinc dialkyldithiophosphates; (F) an antioxidant; (G) ashless friction modifiers; (H) a lubricant base oil;
the preparation method of the ester compound comprises the step of reacting the compound shown as the formula (alpha) with the compound shown as the formula (beta),
HO-L'-OH(α)，
the compound represented by the formula (. Beta.) is obtained by reacting a compound represented by the formula (. Delta.) with a compound represented by the formula (. Epsilon.),
the compound shown in the formula (alpha) is decanediol, the compound shown in the formula (delta) is hexadecenoic acid, and the compound shown in the formula (epsilon) is caproic acid;
the viscosity index improver is selected from one or more of ethylene propylene copolymer, polymethacrylate, polyalkylmethacrylate, methacrylate copolymer, copolymer of styrene and acrylate, hydrogenated or partially hydrogenated copolymer of styrene/isoprene, hydrogenated or partially hydrogenated copolymer of styrene/butadiene, hydrogenated or partially hydrogenated copolymer of isoprene/butadiene; the dispersant is selected from one or more of single polyisobutylene succinimide, double polyisobutylene succinimide, high molecular polyisobutylene succinimide, boronized polyisobutylene succinimide and polyisobutylene succinate; the detergent is selected from one or more of a sulphonate, an alkyl salicylate and a sulphurised alkyl phenate; the alkyl in the zinc dialkyl dithiophosphate is C 2 -C 12 Alkyl groups of (a); the antioxidant is selected from one or more of phenol type antioxidant, amine type antioxidant, phenolic ester type antioxidant and sulfophenolic ester type antioxidant; the ashless friction modifier is selected from one or more of fatty acid polyol esters, fatty amines and fatty amides; the lubricating oil base oil is selected from one or more of API I base oil, II base oil, III base oil, IV base oil and V base oil.
2. The lubricating oil composition according to claim 1, wherein the molar ratio of the reaction between the compound represented by the formula (δ) and the compound represented by the formula (ε) is 0.1 to 10:1; the reaction temperature is 50-160 ℃; the reaction time is 3 to 48 hours.
3. The lubricating oil composition according to claim 1, wherein a catalyst is added in the reaction of the compound represented by the formula (δ) with the compound represented by the formula (e), and the catalyst is one or more of an inorganic acid, an organic acid, a solid acid, a heteropoly acid, an acidic ionic liquid, an acidic resin, an acidic molecular sieve, a metal chloride and a metal oxide.
4. Lubricating oil composition according to claim 1, characterized in that a catalyst is added in the reaction of the compound of formula (δ) with the compound of formula (ε), the catalyst being sulfuric acid, perchloric acid, alCl 3 One or more of tin chloride, n-butyl tin oxide, dibutyl tin oxide, p-toluenesulfonic acid, acidic resins, phosphotungstic heteropoly acids, acidic ionic liquids and acidic molecular sieves.
5. The lubricating oil composition according to claim 1, wherein the molar ratio of the reaction between the compound represented by the formula (α) and the compound represented by the formula (β) is 0.1 to 10:1; the reaction temperature is 70-250 ℃; the reaction time is 0.5 to 24 hours.
6. The lubricating oil composition according to claim 1, wherein the molar ratio of the reaction between the compound represented by the formula (α) and the compound represented by the formula (β) is from 0.2 to 5:1; the reaction temperature is 90-200 ℃; the reaction time is 2 to 15 hours.
7. The lubricating oil composition according to claim 1, wherein a catalyst is added in the reaction of the compound represented by the formula (α) and the compound represented by the formula (β), and the catalyst is one or more of an inorganic acid, an organic acid, a solid acid, a heteropoly acid, an acidic ionic liquid, an acidic resin, an acidic molecular sieve, a metal chloride and a metal oxide.
8. Lubricating oil composition according to claim 1, characterized in that a catalyst is added in the reaction of the compound of formula (α) with the compound of formula (β), the catalyst being sulfuric acid, perchloric acid, alCl 3 One or more of tin chloride, n-butyl tin oxide, dibutyl tin oxide, p-toluenesulfonic acid, acidic resins, phosphotungstic heteropoly acids, acidic ionic liquids and acidic molecular sieves.
9. Lubricating oil composition according to any one of claims 1 to 8, characterized in that the ester compound constitutes 1% to 50% of the total mass of the lubricating oil composition; the viscosity index improver accounts for 1-15% of the total mass of the lubricating oil composition; the dispersant accounts for 1-15% of the total mass of the lubricating oil composition; the detergent accounts for 0.5 to 10 percent of the total mass of the lubricating oil composition; the zinc dialkyl dithiophosphate accounts for 0.1 to 3 percent of the total mass of the lubricating oil composition; the antioxidant accounts for 0.1 to 6 percent of the total mass of the lubricating oil composition; the ashless friction modifier accounts for 0.02-3% of the total mass of the lubricating oil composition; the lubricating oil base oil accounts for 3-96% of the total mass of the lubricating oil composition.
10. The lubricating oil composition of claim 9, wherein the ester compound comprises 2% to 40% of the total mass of the lubricating oil composition; the viscosity index improver accounts for 2 to 12 percent of the total mass of the lubricating oil composition; the dispersant accounts for 2 to 12 percent of the total mass of the lubricating oil composition; the detergent accounts for 2% -8% of the total mass of the lubricating oil composition; the zinc dialkyl dithiophosphate accounts for 0.5 to 2 percent of the total mass of the lubricating oil composition; the antioxidant accounts for 0.2 to 5 percent of the total mass of the lubricating oil composition; the ashless friction modifier accounts for 0.1-2.5% of the total mass of the lubricating oil composition; the lubricating oil base oil accounts for 20-91% of the total mass of the lubricating oil composition.
11. A method of preparing a lubricating oil composition as claimed in any one of claims 1 to 10, comprising the step of mixing the components.
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| CN111040842A (en) * | 2018-10-15 | 2020-04-21 | 中国石油化工股份有限公司 | Diesel engine oil composition and preparation method thereof |
| CN111088091A (en) * | 2018-10-23 | 2020-05-01 | 中国石油化工股份有限公司 | Gasoline engine oil composition and preparation method thereof |
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