Lubricating oil composition and preparation method thereof
By preparing a lubricating oil composition containing nitrogen and boron compounds, the problems of emulsification without stratification and anti-wear performance of ammonia engine lubricating oil under high water generation conditions were solved, achieving excellent lubrication performance.
Patent Information
- Application Number
- CN202410961355.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2026-01-20
AI Technical Summary
Existing technologies struggle to provide lubricants suitable for ammonia engines, especially those that maintain emulsification without stratification and exhibit outstanding anti-wear properties in the presence of significant water generation.
A lubricating oil composition is prepared by mixing components such as nitrogen-boron compounds, alkylated diphenylamine, dispersants, emulsifiers, viscosity index improvers, oil-soluble organic molybdenum friction modifiers, metal corrosion inhibitors, and pour point depressants in a specific ratio.
It achieves excellent anti-oxidation, detergency, extreme pressure anti-wear and anti-rust properties of lubricating oil at high temperatures, and is suitable for engine lubrication using ammonia or ammonia-hydrogen mixture as fuel.
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Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a lubricating oil composition, in particular to a lubricating oil composition for an engine using ammonia gas or a mixture of ammonia gas and hydrogen gas as fuel. BACKGROUND
[0002] Fossil fuel engines produce a large amount of carbon emissions, and finding suitable low-carbon, zero-carbon fuels and developing efficient new combustion technologies to reduce carbon emissions from internal combustion engines has become a common concern worldwide. Hydrogen has the advantages of fast burning speed, easy ignition, and wide flammable limit, but due to the limitations of infrastructure, transportation and storage, and safety issues, hydrogen is currently difficult to be used in internal combustion engines on a large scale. Ammonia is a good hydrogen energy carrier, which can be completely liquefied at 25℃ and 9bar, and is convenient for storage and transportation. The density of liquid ammonia (602kg / m 3 ) is much higher than that of liquid hydrogen (71kg / m 3 ), so ammonia is considered to be the most promising fuel at present. At the same time, the ammonia industry chain and infrastructure development have been mature, and the global annual production of ammonia has exceeded 200 million tons, which provides an important prerequisite for the large-scale promotion and application of ammonia as fuel. The combustion products of ammonia as fuel are water and nitrogen, and no carbon is produced, so ammonia engines need to use special engine oil for lubrication. At the same time, due to the generation of a large amount of water, the main performance required for ammonia engine lubricating oil is to maintain emulsification without separation and have outstanding anti-wear performance. SUMMARY
[0003] The present application provides a lubricating oil composition and a preparation method thereof.
[0004] The lubricating oil composition of the present application comprises:
[0005] (A) a nitrogen-containing boron compound, accounting for 0.1% to 15% (preferably 0.5% to 5%) of the total mass of the lubricating oil composition;
[0006] (B) an alkylated diphenylamine, accounting for 0.1% to 10% (preferably 0.2% to 5%) of the total mass of the lubricating oil composition;
[0007] (C) a dispersant, accounting for 0.5% to 15% (preferably 1% to 10%) of the total mass of the lubricating oil composition;
[0008] (D) an emulsifier, accounting for 0.01% to 3% (preferably 0.1% to 1%) of the total mass of the lubricating oil composition;
[0009] (E) a viscosity index improver, accounting for 1% to 15% (preferably 2% to 10%) of the total mass of the lubricating oil composition;
[0010] (F) oil-soluble organic molybdenum friction modifier, 0.02% to 5% (preferably 0.1% to 3%) by mass of the total lubricating oil composition;
[0011] (G) metal corrosion inhibitor, 0.01% to 3% (preferably 0.02% to 1%) by mass of the total lubricating oil composition;
[0012] (H) pour point depressant, 0.02% to 5% (preferably 0.1% to 3%) by mass of the total lubricating oil composition;
[0013] (J) a major amount of a lubricating base oil;
[0014] wherein the nitrogen-containing boron compound has a structure represented by formula (I) and / or formula (II):
[0015]
[0016] In formula (I), each G group is independently selected from a group represented by formula (III), R' groups, each R' group is independently selected from a C 10 ~C 30 branched alkyl group; one or both G groups in formula (I) is selected from a group represented by formula (III);
[0017]
[0018] R groups in formula (III) are selected from a C2~C8linear or branched alkylene group, each R" group is independently selected from a C2~C 20 linear or branched alkylene group, n is an integer between 1 and 5;
[0019] In formula (II), R' groups are selected from a C 10 ~C 30 branched alkyl group, each R group is independently selected from a C2~C8linear or branched alkylene group, G' groups are selected from a group represented by formula (IV);
[0020]
[0021] R0 groups in formula (IV) are selected from a C 10 ~C 30 linear or branched alkyl group.
[0022] According to the present application, preferably, R' groups are selected from a C 15 ~C 25 branched alkyl group, R groups are selected from a C2~C6linear or branched alkylene group, R" groups are selected from a C2~C 18 linear or branched alkylene group, n is 1, 2, 3 or 4, R0 groups are selected from a C 15 ~C 25a straight-chain or branched alkyl group.
[0023] According to the present application, the nitrogen-containing boron compound is one or more of the following specific structural compounds:
[0024]
[0025]
[0026] According to the present application, the method for preparing the nitrogen-containing boron compound comprises: reacting boric acid, R’OH, a compound represented by formula (X) and / or a compound represented by formula (Y), and collecting the product;
[0027]
[0028] R’ is selected from a C 10 ~C 30 branched alkyl group; each R group is independently selected from a C2~C8straight-chain or branched alkylene group; each R” group is independently selected from a C2~C 20 straight-chain or branched alkylene group, and n is an integer between 1 and 5; the R0group is selected from a C 10 ~C 30 straight-chain or branched alkyl group.
[0029] According to the present application, preferably, R’ is selected from a C 15 ~C 25 branched alkyl group; each R group is selected from a C2~C6straight-chain or branched alkylene group, and each R” group is selected from a C2~C 18 straight-chain or branched alkylene group, and n is 1, 2, 3 or 4; the R0group is selected from a C 15 ~C 25 straight-chain or branched alkyl group.
[0030] According to the present application, R’OH can be selected from a C 10 ~C 30 branched aliphatic alcohol, preferably a C 15 ~C 25 Gilbert alcohol, for example one or more of 2-butyloctanol, 2-hexyldecanol, 2-octyldodecanol, 2-decyltetradecanol and 2-dodecylhexadecanol.
[0031] According to the present application, the compound represented by formula (X) can be N-(2-hydroxyethyl)ethylenediamine.
[0032] According to the present application, the compound represented by formula (Y) can be one or more of N,N-dihydroxyethyldodecylamine, N,N-dihydroxyethyltetradecylamine, N,N-dihydroxyethylhexadecylamine and N,N-dihydroxyethyloctadecylamine.
[0033] According to the present application, the molar ratio between the boronic acid and R'OH, the compound of formula (X) and / or the compound of formula (Y) as a whole is 0.5 to 6:1, more preferably 1 to 3:1. Further preferably, the molar ratio between the boronic acid, R'OH, the compound of formula (X) and / or the compound of formula (Y) is 1:0.5 to 3:0.5 to 4, more preferably 1:0.5 to 1.5:0.5 to 3.
[0034] According to the present application, the reaction temperature of the boronic acid, R'OH, the compound of formula (X) and / or the compound of formula (Y) is 80°C to 280°C, preferably 100°C to 200°C.
[0035] According to the present application, the reaction time of the boronic acid, R'OH, the compound of formula (X) and / or the compound of formula (Y) is generally longer the better, and in general, the reaction time can be 1 to 10 hours, preferably 3 to 6 hours.
[0036] According to the present application, a catalyst can be added to the reaction of the boronic acid, R'OH, the compound of formula (X) and / or the compound of formula (Y), and the catalyst is preferably an acidic catalyst, and for example, one or more of concentrated sulfuric acid, zinc chloride, aluminum chloride, benzene sulfonic acid and titanium ester can be used, and the catalyst is preferably added in an amount of 0.01% to 2% of the total mass of the boronic acid, R'OH, the compound of formula (X) and / or the compound of formula (Y). After the reaction is completed, the catalyst can be removed by washing with a base and / or water.
[0037] According to the present application, a solvent can be added to the reaction of the boronic acid, R'OH, the compound of formula (X) and / or the compound of formula (Y), or a solvent can not be added. The solvent can be one or more of aromatic hydrocarbons (such as benzene, toluene, xylene and cumene), C 6-20 aromatic hydrocarbons (such as benzene, toluene, xylene and cumene), C 6-10 alkanes (such as n-hexane, cyclohexane and petroleum ether), solvent naphtha. The solvent can be removed after the reaction is completed using a method known to those skilled in the art, for example, by distilling the solvent under normal pressure or reduced pressure.
[0038] According to the present application, the reaction of the boronic acid, R'OH, the compound of formula (X) and / or the compound of formula (Y) can be carried out under the protection of an inert gas atmosphere. The inert gas, such as nitrogen and argon, is not particularly limited.
[0039] The method for preparing the nitrogen-containing boron compound according to the present application has simple steps and high conversion rate in the reaction process.
[0040] According to the present application, the alkyl group in the alkylated diphenylamine can be C2 to C 12alkylated diphenylamine can be selected from IRGANOX L-01 and IRGANOX L-57 produced by BASF, T534 produced by Beijing Xingpu, LZ5150A produced by Lubrizol Additive, VANLUBE NA, VANLUBE 961 and VANLUBE 81 produced by Vanderbilt, p,p'-diisooctyl diphenylamine RC7001 produced by Rhein Chemie, and the like.
[0041] According to the present application, the dispersant can be selected from one or more of monomeric isobutylene succinimide, dimeric isobutylene succinimide, polymeric isobutylene succinimide, high-molecular isobutylene succinimide, boronized isobutylene succinimide and isobutylene succinic acid ester, wherein the number average molecular weight of the isobutylene group can be 500-4000, preferably 700-3000. The dispersant can be selected from T151, T152, T154 and T161 produced by Nanfang Additives Co., Ltd., T155, T161A and T161B produced by Jinzhou Petrochemical Branch Additive Factory, LZ6418 and LZ6420 produced by Lubrizol, Hitec646, Hitec648 and Hitec7714 produced by Yafutong, MX3316 produced by Agip Petroli, and LZ935 and LZ936 produced by Lubrizol, and the like.
[0042] According to the present application, the emulsifier can be selected from one or more of glyceryl triisostearate, glyceryl cocoate, caprylic / capric glyceride, stearate and behenyl alcohol polyether, and common trade designations include PEG-5, PEG-7, PEG-20, PEG-100, behenyl alcohol polyether-25, and the like, for example, PEG-20 produced by Suzhou Yuantai Run Chemical Co., Ltd., and the like.
[0043] According to the present application, the viscosity index improver can be selected from one or more of ethylene propylene copolymer, polymethacrylate, polyalkyl methacrylate, copolymer of styrene and acrylic acid ester, copolymer of styrene and isoprene, copolymer of styrene and butadiene, and copolymer of isoprene and butadiene, for example, SV203, SV260 and SV261 produced by Infineum, LZ7070, LZ7065, LZ7067 and LZ7077 produced by Lubrizol, and the like.
[0044] According to the present application, the oil-soluble organic molybdenum friction modifier can be selected from one or more of molybdenum dialkyldithiophosphates, molybdenum dialkyldithiophosphates, molybdenum dialkyldithiophosphates, xanthates, thioxanthates, trinuclear molybdenum sulfur complexes, molybdenum amine complexes, and molybdate ester oil-soluble organic molybdenum friction modifiers, such as MolyVan L, 822, 855, 3000 produced by Vanderbilt Company, 515, 525, 710 produced by Asahi Denka, POUPC 1001, 1002, 1003 produced by Pacific Union (Beijing) Petroleum Chemical Co., Ltd., and the like.
[0045] According to the present application, the metal corrosion inhibitor can be selected from one or more of triazole derivatives, thiazole derivatives, and thiadiazole derivatives, including one or more of benzotriazole, benzothiazole, tolyltriazole, octyltriazole, 2-mercaptobenzothiazole, 2,5-dimercapto-1,3,4-thiadiazole, 2-mercapto-5-hydrocarbon-substituted-1,3,4-thiadiazole, 2-dimercapto-5-dithio-1,3,4-thiadiazole, N,N-dihexylaminomethylenebenzotriazole, 2-mercaptobenzothiadiazole, and the like.
[0046] According to the present application, the pour point depressant can be selected from one or more of fumarate esters, vinyl acetate copolymers, polymethacrylate esters, and poly-alpha-olefins, common trade designations including 1-248 by Wincrete, T803 by Jinzhou Shengda Chemical Co., Ltd., VX385 by Runying Union Co., Ltd., and the like.
[0047] According to the present application, the lubricating base oil can be selected from mineral oil and / or synthetic lubricating oil. The mineral oil can be selected from one or more of API I, II, III base oils, common trade designations including II-4, II-6, III-4, III-6, and the like. The synthetic lubricating oil can be selected from one or more of polymeric hydrocarbon oil, alkylbenzene and its derivatives, ester oil, Fischer-Tropsch synthetic hydrocarbon oil. The lubricating base oil is preferably a lubricating base oil with a viscosity index greater than 80, a saturated hydrocarbon mass fraction greater than 90%, and a sulfur content mass fraction less than 0.03%.
[0048] According to the present application, other types of lubricating oil additives can also be added to the lubricating oil composition without particular limitation.
[0049] The method for preparing the lubricating oil composition of the present application includes the step of mixing the above components. The mixing temperature is preferably between 40°C and 90°C, and the mixing time is preferably between 1 hour and 6 hours.
[0050] The lubricating oil composition of the present application has excellent high-temperature antioxidation, detergency, extreme pressure and antiwear properties, emulsion retention and anti-rust properties, and is suitable for use as a lubricating oil for an engine using ammonia or a mixture of ammonia and hydrogen as fuel. BRIEF DESCRIPTION OF DRAWINGS
[0051] Figure 1 The infrared spectrum of the product of Example 1.
[0052] Figure 2 The nuclear magnetic resonance spectrum of the product of Example 1. 1 DETAILED DESCRIPTION
[0053] The present application is further illustrated by the following examples, which are not intended to be limiting.
[0054] The main raw materials used are as follows:
[0055] Concentrated sulfuric acid, National Pharmaceutical Group Chemical Reagent Co., Ltd., analytical pure
[0056] Boric acid, National Pharmaceutical Group Chemical Reagent Co., Ltd., chemical pure
[0057] Hydroxyethyl ethylenediamine, National Pharmaceutical Group Chemical Reagent Co., Ltd., chemical pure
[0058] N,N-dihydroxyethyl octadecylamine, National Pharmaceutical Group Chemical Reagent Co., Ltd., chemical pure
[0059] 2-octyldodecanol, National Pharmaceutical Group Chemical Reagent Co., Ltd., chemical pure
[0060] 2-hexyldecanol, National Pharmaceutical Group Chemical Reagent Co., Ltd., chemical pure
[0061] Cetyl alcohol, National Pharmaceutical Group Chemical Reagent Co., Ltd., chemical pure
[0062] Ethanolamine, National Pharmaceutical Group Chemical Reagent Co., Ltd., chemical pure
[0063] Polyol ester (commercial brand 5101), Sinopec Lubricant Chongqing Branch, industrial product
[0064] Take 12 g of boric acid, 120 g of 2-octyldodecanol, 21 g of N-hydroxyethyl ethylenediamine and 0.5 g of concentrated sulfuric acid into a flask with a water separation reflux device and a thermometer, stir, heat, react at 190°C for 5 h, and remove the water produced during the reaction. After the reaction is completed, cool down to obtain a yellowish transparent liquid. Wash the reaction product with distilled water until it is neutral, and distill the organic phase under reduced pressure at 100 Pa and 150°C for 1 h to remove the water and unreacted raw materials, to obtain the nitrogen-containing boric compound W-01, with a reaction conversion rate of 95.8%.
[0065] The reaction formula is as follows.
[0066]
[0067] The product prepared in Example 1 was subjected to infrared spectrum, nuclear magnetic 1 H spectrum analysis, and the infrared spectrum chart is shown in Figure 1 , the analysis results are shown in Table 1, and the nuclear magnetic 1 H spectrum chart is shown in Figure 2 , and the analysis results are shown in Table 2.
[0068] Table 1 Product infrared analysis results
[0069]
[0070] In Table 1, the existence of C-NH stretching vibration peak, C-N stretching vibration peak, B-O stretching vibration peak and other characteristic peaks in the product can indicate that the synthesized product is the target compound.
[0071] Table 2 Product nuclear magnetic 1 H spectrum analysis results
[0072]
[0073] In Table 2, the existence of O-CH2 proton peak, N-CH2 proton peak, NH2 proton peak and other characteristic peaks in the product can indicate that the synthesized product is the target compound.
[0074] Example 2
[0075] 12 g of boric acid, 49 g of 2-hexyl decanol and 42 g of N-hydroxyethyl ethylenediamine were charged into a flask with a water separation reflux device and a thermometer, stirred, heated, reacted at 170°C for 6 h, and water generated in the reaction was removed during the reaction. After the reaction was completed, the temperature was lowered to obtain a yellowish transparent liquid. The reaction product was washed with distilled water until it was neutral, and the organic phase was distilled under reduced pressure at 100 Pa and 150°C for 1 h to remove water and unreacted raw materials, thereby obtaining a nitrogen-containing boron compound W-02, and the reaction conversion rate was 96.1%.
[0076] The reaction formula is as follows.
[0077]
[0078] Example 3
[0079] Into a flask equipped with a water separator, a thermometer, 12 g of boric acid, 49 g of 2-hexyldecanol, and 72 g of N,N-dihydroxyethyloctadecylamine were charged, stirred, heated, and reacted at 160°C for 4 h while removing water produced in the reaction. After the reaction, the temperature was lowered to obtain a yellowish transparent liquid. The reaction product was washed with distilled water until neutral, and the organic phase was distilled under reduced pressure at 100 Pa and 150°C for 1 h to remove water and unreacted raw materials, thereby obtaining a nitrogen-containing boron compound W-03 with a reaction conversion rate of 96.3%.
[0080] The reaction formula is shown below.
[0081]
[0082] Comparative Example 1
[0083] Into a reaction vessel, 36.3 g of hexadecanol, 18.3 g of ethanolamine, 6.2 g of boric acid, and 90 g of toluene solvent were charged, stirred, and heated at 145°C for 6 h. Finally, the solvent and unreacted ethanolamine were removed by filtration and distillation to obtain a comparative nitrogen-containing boron compound V-01.
[0084] Comparative Example 2
[0085] Into a flask equipped with a water separator, a thermometer, 12 g of boric acid, 52 g of octanol, 21 g of N-hydroxyethyl ethylenediamine, and 0.5 g of concentrated sulfuric acid were charged, stirred, heated, and reacted at 190°C for 5 h while removing water produced in the reaction. After the reaction, the temperature was lowered to obtain a yellowish transparent liquid. The reaction product was washed with distilled water until neutral, and the organic phase was distilled under reduced pressure at 100 Pa and 150°C for 1 h to remove water and unreacted raw materials, thereby obtaining a comparative nitrogen-containing boron compound V-02.
[0086] Examples and comparative examples of lubricating oil compositions
[0087] According to the formulation compositions in Table 3, lubricating oil compositions of Examples 4 to 8 and Comparative Examples 3 to 5 were respectively prepared.
[0088] Table 3
[0089]
[0090] The high-temperature oxidation resistance of the oil samples of Examples 4 to 8 and Comparative Examples 3 to 5 was tested by a pressurized differential scanning calorimetry test (PDSC) at a temperature of 220°C and a pressure of 3.5 MPa. The test results were expressed by the oxidation induction period (unit: min) of the test sample. The longer the oxidation induction period, the better the high-temperature oxidation resistance of the test sample.
[0091] The detergency of the oil products of Examples 4-8 and Comparative Examples 3-5 was tested by a heat tube coking simulation test. The method is to circulate 15 ml of the test sample in a heat tube, while injecting oxygen to accelerate oil aging, and heating to 310°C. The glass tube wall is continuously scored after 6 hours. The full score is 10, and the lower the score, the worse the detergency of the test sample.
[0092] The BRT ball rusting test was performed on the oil products of Examples 4-8 and Comparative Examples 3-5. During the entire 18-hour bench test, the metal ball protected by the test sample was continuously exposed to an acidic liquid and air. After the test, the intensity of the metal ball's reflective surface was measured to obtain a gray scale test value, which was used to determine the corrosion area and evaluate the anti-rusting ability of the test oil. The injection rate of the acetic acid / hydrobromic acid / hydrochloric acid / deionized water solution prepared according to the required proportion in the test standard was 0.19 ml / hour, the air flow was 40 ml / min, and the oil temperature was 48°C. The higher the score, the better the anti-rusting performance of the test sample.
[0093] The emulsion retention test was performed on the oil products of Examples 4-8 and Comparative Examples 3-5, and the test standard was NB / SH / T0597.
[0094] The results of the above test tests are shown in Table 4. As shown in Table 4, the lubricating oil composition of the present application has excellent antioxidant performance, high temperature detergency, and good anti-rusting performance and emulsion retention performance.
[0095] Table 4
[0096]
[0097] SRV anti-wear and friction reduction evaluation tests and four-ball tester anti-wear evaluation tests were performed on the oil products of Examples 4-8 and Comparative Examples 3-5, respectively, to evaluate the anti-wear and friction reduction performance. The test conditions for the SRV anti-wear and friction reduction evaluation test were: temperature 80°C, load 300N, stroke 1mm, test time 1 hour, and frequency 50Hz. The four-ball tester anti-wear evaluation test used the method of the National Energy Bureau Standard NB / SH / T 0189-2017, and the test conditions were: temperature 75°C, load 392N, rotation speed 1200r / min, and test time 1 hour. A four-ball friction tester was used to evaluate the extreme pressure load carrying performance of the oil. The evaluation test was performed according to the GB / T3142-2019 standard. The test results are shown in Table 5.
[0098] As shown in Table 5, the lubricating oil composition of the present application has excellent extreme pressure load carrying performance, anti-wear performance, and good friction reduction performance.
[0099] Table 5
[0100]
Claims
1. A lubricating oil composition comprising: (A) a nitrogen-containing boron compound in an amount of 0.1% to 15% (preferably 0.5% to 5%) by mass of the total lubricating oil composition; (B) an alkylated diphenylamine in an amount of 0.1% to 10% (preferably 0.2% to 5%) by mass of the total lubricating oil composition; (C) a dispersant in an amount of 0.5% to 15% (preferably 1% to 10%) by mass of the total lubricating oil composition; (D) an emulsifier in an amount of 0.01% to 3% (preferably 0.1% to 1%) by mass of the total lubricating oil composition; (E) a viscosity index improver in an amount of 1% to 15% (preferably 2% to 10%) by mass of the total lubricating oil composition; (F) an oil-soluble organic molybdenum friction modifier in an amount of 0.02% to 5% (preferably 0.1% to 3%) by mass of the total lubricating oil composition; (G) a metal corrosion inhibitor in an amount of 0.01% to 3% (preferably 0.02% to 1%) by mass of the total lubricating oil composition; (H) a pour point depressant in an amount of 0.02% to 5% (preferably 0.1% to 3%) by mass of the total lubricating oil composition; and (J) a major amount of a lubricating base oil; In formula (I), each G group is independently selected from a group represented by formula (III), R' groups, each R' group is independently selected from a C 10 ~ C 30 branched alkyl group; one or both G groups in formula (I) is selected from a group represented by formula (III); The R groups in formula (III) are selected from C2-C8 linear or branched alkylene groups, and the R" groups are each independently selected from C2-C8 linear or branched alkylene groups, n is an integer between 1 and 5. 20 The R groups in formula (III) are selected from C2-C8 linear or branched alkylene groups, and the R" groups are each independently selected from C2-C8 linear or branched alkylene groups, n is an integer between 1 and 5. In formula (II), the R' groups are selected from C 10 ~ C 30 branched alkyl, each of the R groups is independently selected from C2-C8 straight chain or branched alkylene, and the G' group is selected from the group represented by formula (IV); The R0group in formula (IV) is selected from C 10 ~C 30 straight or branched chain alkyl.
2. The lubricating oil composition of claim 1, wherein R' groups are selected from C 15 ~C 25 branched alkyl, R groups are selected from C2~C6linear or branched alkylene, R" groups are selected from C2~C 18 linear or branched alkylene, n is 1, 2, 3 or 4, R0groups are selected from C 15 ~C 25 linear or branched alkyl.
3. The lubricating oil composition of claim 1, wherein wherein the nitrogen-containing boron compound has a structure represented by formula (I) and / or formula (II):
4. The lubricating oil composition of claim 1, wherein the nitrogen-containing boron compound is one or more of the following specific structural compounds: R' groups are selected from C 10 ~C 30 branched alkyl groups; R groups are each independently selected from C2~C8linear or branched alkylene groups; R" groups are each independently selected from C2~C 20 linear or branched alkylene groups, n is an integer between 1 and 5; R0groups are selected from C 10 ~C 30 linear or branched alkyl groups.
5. The lubricating oil composition of claim 4, wherein R' groups are selected from C 15 ~C 25 branched alkyl; R groups are selected from C2-C6 straight chain or branched alkylene, R" groups are selected from C2-C 18 branched alkylene, n is 1, 2, 3 or 4; R0 groups are selected from C 15 ~C 25 straight chain or branched alkyl.
6. The lubricating oil composition according to claim 4, wherein said R'OH is selected from the group consisting of C 10 ~C 30 a branched aliphatic alcohol; said compound of formula (X) is selected from the group consisting of N-(2-hydroxyethyl)ethylenediamine; and said compound of formula (Y) is selected from the group consisting of one or more of N,N-dihydroxyethyl dodecylamine, N,N-dihydroxyethyl tetradecylamine, N,N-dihydroxyethyl hexadecylamine, and N,N-dihydroxyethyl octadecylamine.
7. The lubricating oil composition according to claim 4, wherein the method for producing the nitrogen-containing boron compound comprises reacting boric acid, R'OH, a compound represented by formula (X) and / or a compound represented by formula (Y), and collecting the product; 8. The lubricating oil composition of claim 7, wherein the molar ratio between boric acid, R'OH, a compound represented by formula (X) and / or a compound represented by formula (Y) as a whole and boric acid is 0.5 to 6: 1; and the reaction temperature of boric acid, R'OH, a compound represented by formula (X) and / or a compound represented by formula (Y) is 80°C to 280°C.
9. The lubricating oil composition of any of claims 1 to 8, wherein the alkyl groups in the alkylated diphenylamine are C2to C 12 linear or branched alkyl groups; the dispersant is selected from one or more of mono, di, poly, and high poly isobutylene succinimide, boronated polyisobutylene succinimide, and polyisobutylene succinate; the emulsifier is selected from one or more of glycerol triisostearate, glycerol cocoate, glycerol caprylate / caprate, stearate ester, and behenyl alcohol polyether; the viscosity index improver is selected from one or more of ethylene propylene copolymer, polymethacrylate, polyalkylmethacrylate, copolymer of styrene and acrylic ester, copolymer of styrene and isoprene, copolymer of styrene and butadiene, and copolymer of isoprene and butadiene; the oil-soluble organic molybdenum friction modifier is selected from one or more of molybdenum dialkyldithiophosphates, molybdenum dialkyldithiophosphate oxides, molybdenum dialkyldithioureans, molybdenum xanthates, molybdenum thioxanthates, trinuclear molybdenum sulfur complexes, molybdenum amine complexes, and molybdate ester oil-soluble organic molybdenum friction modifiers; the metal corrosion inhibitor is selected from one or more of triazole derivatives, thiazole derivatives, and thiadiazole derivatives; the pour point depressant is selected from one or more of fumarate esters, vinyl acetate copolymers, polymethacrylates, and poly-alpha-olefins; and the lubricating base oil is selected from mineral oil and / or synthetic lubricating oil. the molar ratio between boric acid, R'OH, a compound represented by formula (X) and / or a compound represented by formula (Y) is 1: 0.5 to 3: 0.5 to 4.
10. A method for producing the lubricating oil composition according to any one of claims 1 to 9, comprising the step of mixing the components.