A lubricating oil composition for a hydrogen internal combustion engine and a preparation method thereof

Abstract

The invention discloses a lubricating oil composition for a hydrogen internal combustion engine and a preparation method thereof. The lubricating oil comprises a base oil, a special compounding agent for a hydrogen internal combustion engine, a viscosity index agent, an anti-wear and friction reducing agent, and an emulsifying stabilizer; the special compounding agent for a hydrogen internal combustion engine comprises a base oil, a detergent magnesium salicylate, a dispersant, a viscosity index agent, an anti-wear and friction reducing agent, an antioxidant, an emulsifying stabilizer, and a pour point depressant, and the antioxidant comprises a main antioxidant and an auxiliary antioxidant zirconium dioxide. During the preparation, the special compounding agent for a hydrogen internal combustion engine is first prepared, and then the special compounding agent for a hydrogen internal combustion engine is applied to prepare the lubricating oil composition for a hydrogen internal combustion engine. The lubricating oil composition of the invention is matched with hydrogen internal combustion engines, has excellent high temperature performance, ultra-long emulsification stability, ultra-low ash content, and excellent wear resistance, can still maintain good lubricity and stability at high temperatures, solves various problems in the working process of the hydrogen internal combustion engine, and prolongs the service life of the hydrogen internal combustion engine.

Description

Technical Field

[0001] The invention belongs to the field of lubricating oil preparation, and in particular relates to a hydrogen internal combustion engine lubricating oil composition and a preparation method thereof. Background Art

[0002] As the world pays more attention to sustainable development and environmental protection, hydrogen energy is gradually emerging as an efficient and clean power option. Against this backdrop, the development and application of hydrogen internal combustion engines has become an important research direction for the automotive industry. The efficient operation of hydrogen internal combustion engines is inseparable from specialized engine oils, and the technological progress of such oils is one of the keys to promoting the commercialization of hydrogen internal combustion engines.

[0003] Hydrogen internal combustion engines are fundamentally different in principle from traditional gasoline or diesel internal combustion engines. Hydrogen internal combustion engines use hydrogen as fuel, and their combustion produces mainly water, with no carbon emissions, which greatly reduces environmental pollution. In addition, hydrogen internal combustion engines also show unique advantages in efficiency and power output. However, the combustion characteristics of hydrogen and its corrosive effects on materials pose new challenges that are directly related to the performance requirements of engine oils.

[0004] Lubricants specially designed for hydrogen internal combustion engines need to have higher antioxidant properties and better wear protection. Since hydrogen burns at a high temperature, the oil must be able to maintain good lubricity and stability at high temperatures. At the same time, since hydrogen combustion does not produce carbon deposits, detergents in traditional engine oils may no longer be necessary. Instead, antioxidants and anti-wear additives need to be added to improve the high-temperature performance of the oil.

[0005] In terms of technological development, researchers are meeting these new demands through material innovation at the molecular level. For example, the use of advanced base oils such as polyalphaolefins (PAO) and synthetic esters can improve the high temperature stability and low temperature fluidity of oil products. In addition, the addition of specific anti-wear additives, such as zinc dithiophosphate (ZDDP) alternatives, can reduce phosphorus and sulfur emissions without sacrificing anti-wear performance.

[0006] Based on this, a special lubricant suitable for hydrogen internal combustion engines is developed, which has excellent high-temperature antioxidant and anti-wear properties. Summary of the invention

[0007] Purpose of the invention: The technical problem to be solved by the present invention is to provide a special lubricating oil composition for use with a hydrogen internal combustion engine, the lubricating oil composition having excellent high-temperature oxidation resistance and anti-wear properties, so that it can still maintain good lubricity and stability at high temperatures, and at the same time has excellent emulsification stability.

[0008] Technical solution: The lubricating oil composition for hydrogen internal combustion engines of the present invention comprises the following raw materials by weight:

[0009]

[0010] The special composite agent for hydrogen internal combustion engines comprises, by weight, 20-30% of base oil, 15-20% of magnesium salicylate as a detergent, 25-30% of a dispersant, 10-15% of a viscosity modifier, 5-10% of an anti-wear and friction reducer, 5-10% of an antioxidant, 2-4% of an emulsion stabilizer and 0.3-0.5% of a pour point depressant; the antioxidant comprises 85-95% of a primary antioxidant and 5-15% of a secondary antioxidant zirconium dioxide.

[0011] The present invention is based on base oil, viscosity modifier, anti-wear and friction reducer and emulsification stabilizer, and a special composite agent for hydrogen internal combustion engine is added to make the prepared lubricating oil composition adapt to the working characteristics of hydrogen internal combustion engine, and can still maintain good lubricity and stability under high temperature conditions, and has excellent emulsification stability to water generated by hydrogen internal combustion engine. Among them, the antioxidant composed of main antioxidant and zirconium dioxide secondary antioxidant is adopted in the special composite agent for hydrogen internal combustion engine, and the addition of zirconium dioxide improves the high temperature oxidation resistance and wear resistance of the lubricating oil as a whole, and magnesium salicylate is used as a detergent at the same time, and the carboxyl group on the structure of magnesium salicylate is combined with the hydroxyl group on zirconium dioxide, and then based on the action of magnesium salicylate, the stable dispersion of zirconium dioxide in the lubricating oil composition system is improved, its activity is promoted, and the high temperature oxidation resistance and wear resistance of the overall system are improved.

[0012] Furthermore, the base oil used in the lubricating oil composition of the present invention is a base oil or a mixture that meets API Class II, Class III, Class IV, Class V, and preferably can be base oil 100N, base oil 150N or base oil 500N.

[0013] Furthermore, the dispersant used in the lubricating oil composition of the present invention may be polyisobutylene succinimide and / or boronated bispolyisobutylene succinimide.

[0014] Furthermore, the viscosity modifier used in the lubricating oil composition of the present invention is ethylene-propylene copolymer and / or polyhydrogenated styrene isoprene.

[0015] Furthermore, the anti-wear and friction reducing agent used in the lubricating oil composition of the present invention can be molybdenum dialkyl dithiophosphate or zinc dialkyl dithiophosphate.

[0016] Furthermore, the primary antioxidant used in the lubricating oil composition of the present invention may be di-tert-butyl-p-cresol and / or dialkyldiphenylamine.

[0017] Furthermore, the emulsion stabilizer used in the lubricating oil composition of the present invention may include polymethacrylate and / or polyoxypropylene lanolin alcohol ether.

[0018] Furthermore, the pour point depressant used in the lubricating oil composition of the present invention may be an alkyl naphthalene and / or a fumarate.

[0019] The method for preparing the above-mentioned hydrogen internal combustion engine lubricating oil composition of the present invention comprises the following steps:

[0020] (1) Preparation of a special composite agent for hydrogen internal combustion engines: after mixing and stirring the base oil, the detergent magnesium salicylate and the antioxidant, a dispersant, a viscosity modifier, an anti-wear and friction reducer, an emulsion stabilizer and a pour point depressant are added, and the mixture is heated to 60-65° C. and stirred evenly to obtain a special composite agent for hydrogen internal combustion engines;

[0021] (2) Preparation of an internal combustion engine lubricating oil composition: base oil, a special compound for hydrogen internal combustion engines, a viscosity modifier, an anti-wear and friction reducer, and an emulsion stabilizer are mixed and heated to 60-65° C., stirred evenly, and then filtered to obtain the lubricating oil composition.

[0022] Beneficial effects: Compared with the prior art, the significant advantages of the present invention are: the lubricating oil composition is suitable for use in hydrogen internal combustion engines, has excellent high-temperature performance, ultra-long emulsification stability, ultra-low ash content and excellent anti-wear ability, and can still maintain good lubricity and stability at high temperatures to solve various problems in the operation of hydrogen internal combustion engines and extend the service life of hydrogen internal combustion engines. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a state diagram of the hydrogen internal combustion engine lubricating oil composition prepared in Example 1 of the present invention after being left to stand for 720 hours. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] It should be noted that the base oil used in the present invention is a base oil or a mixture that meets API Class II, Class III, Class IV, Class V, preferably base oil 100N, base oil 150N, base oil 500N, which can be directly purchased from Mobil Corporation of the United States. The viscosity index agent is ethylene-propylene copolymer and or polyhydrogenated styrene isoprene. The viscosity index agent SV261 used in the following examples is from Runyinlian Company of the United States. The anti-wear and friction reducer is dialkyl dithiophosphate molybdenum or dialkyl dithiophosphate zinc. The following examples use dialkyl dithiocarbamate molybdenum purchased from Ytterbium Barium Bio; the emulsion stabilizer can include polymethacrylate and / or polyoxypropylene lanolin alcohol ether. The following examples use VISCOPLEX 6-850 purchased from Evonik Degussa of Germany. Other raw materials are not specifically stated and can be purchased from commercial sources.

[0026] In addition, the viscosity grade of the hydrogen internal combustion engine oil in the following Examples 1 to 3 of the present invention is 10W-40.

[0027] Example 1

[0028] The components of the special composite agent for hydrogen internal combustion engines used in this embodiment 1 are shown in the following Table 1. The components of the lubricating oil composition of this embodiment 1 are shown in the following Table 2.

[0029] Table 1 Component contents of the composite agent for hydrogen internal combustion engine of Example 1

[0030]

[0031] Table 2 Lubricating oil composition component content

[0032] Serial number raw material content / % 1 Base oil 150N 65.4 2 Base oil 500N 15 3 Special compound for hydrogen internal combustion engine 13 4 Viscosity Agent SV261 6 5 Molybdenum dialkyl dithiocarbamate 0.3 6 VISCOPLEX6-850 0.3

[0033] The method for preparing the lubricating oil composition of Example 1 comprises the following steps:

[0034] (1) Preparing a special composite agent for hydrogen internal combustion engines: mixing a base oil, a detergent magnesium salicylate and an antioxidant, adding a dispersant, a viscosity modifier, an anti-wear and friction reducer, an emulsion stabilizer and a pour point depressant, heating to 60° C. and stirring evenly to prepare a special composite agent for hydrogen internal combustion engines;

[0035] (2) Preparation of an internal combustion engine lubricating oil composition: base oil, a special compound for hydrogen internal combustion engines, a viscosity modifier, an anti-wear and friction reducer, and an emulsion stabilizer are mixed and heated to 60° C., stirred evenly, and then filtered to obtain the lubricating oil composition.

[0036] Example 2

[0037] The components of the special composite agent for hydrogen internal combustion engines used in Example 2 are shown in Table 3. The components of the lubricating oil composition of Example 2 are shown in Table 4.

[0038] Table 3 Component contents of the composite agent for hydrogen internal combustion engine in Example 2

[0039]

[0040] Table 4 Lubricating oil composition component content

[0041] Serial number raw material content / % 1 Base oil 150N 68 2 Base oil 500N 15 3 Special compound for hydrogen internal combustion engine 10 4 Viscosity Agent SV261 6 5 Molybdenum dialkyl dithiocarbamate 0.5 6 VISCOPLEX6-850 0.5

[0042] The preparation method of the lubricating oil composition of Example 2 is the same as that of Example 1.

[0043] Example 3

[0044] The components of the composite agent for hydrogen internal combustion engines used in Example 3 are shown in Table 5. The components of the lubricating oil composition of Example 3 are shown in Table 6.

[0045] Table 5 Component contents of the composite agent for hydrogen internal combustion engine of Example 3

[0046]

[0047]

[0048] Table 6 Lubricating oil composition component content

[0049] Serial number raw material content / % 1 Base oil 150N 68.2 2 Base oil 500N 10 3 Special compound for hydrogen internal combustion engine 13 4 Viscosity Agent SV261 8 5 Molybdenum dialkyl dithiocarbamate 0.3 6 VISCOPLEX6-850 0.5

[0050] The method for preparing the lubricating oil composition of Example 3 comprises the following steps:

[0051] (1) Preparation of a special composite agent for hydrogen internal combustion engines: after mixing and stirring the base oil, the detergent magnesium salicylate and the antioxidant, adding the dispersant, the viscosity modifier, the anti-wear and friction reducer, the emulsion stabilizer and the pour point depressant, heating to 65° C. and stirring evenly, the special composite agent for hydrogen internal combustion engines is prepared;

[0052] (2) Preparation of an internal combustion engine lubricating oil composition: base oil, a special compound for hydrogen internal combustion engines, a viscosity modifier, an anti-wear and friction reducer, and an emulsion stabilizer are mixed and heated to 65° C., stirred evenly, and then filtered to obtain the lubricating oil composition.

[0053] Comparative Example

[0054] This comparative example is basically the same as Example 1, except that the detergent is magnesium cyclohexaneate. The specific components are shown in Tables 7 and 8 below.

[0055] Table 7 Comparative Example of the content of the special composite agent for hydrogen internal combustion engine

[0056]

[0057]

[0058] Table 8 Lubricating oil composition component content

[0059] Serial number raw material content / % 1 Base oil 150N 65.4 2 Base oil 500N 15 3 Special compound for hydrogen internal combustion engine 13 4 Viscosity Agent SV261 6 5 Molybdenum dialkyl dithiocarbamate 0.3 6 VISCOPLEX6-850 0.3

[0060] Performance Testing

[0061] The above-mentioned Examples 1-3 and the comparative example were tested for performance, and the obtained results are shown in the following Table 9. The emulsion stability test method is to mix the water-oil ratio at a ratio of 1:4 and stir at high speed for 2 minutes, and then place it at room temperature (15-25°C) to observe the stratification phenomenon.

[0062] Table 9 Performance test data of Examples 1-3 and Comparative Examples

[0063]

[0064]

[0065] It can be seen from Examples 1 to 3 and Table 9 that the lubricating oil composition prepared by the present invention is suitable for use in hydrogen internal combustion engines, has excellent high temperature performance, ultra-long emulsification stability, ultra-low ash content and excellent anti-wear ability, and can still maintain good lubricity and stability at high temperatures to solve various problems in the operation of hydrogen internal combustion engines and extend the service life of hydrogen internal combustion engines.

[0066] In combination with Example 1 and the comparative example, the crankshaft simulation and oxidation stability (rotating oxygen bomb method) in Table 9 show that the anti-oxidation performance of the grease composition prepared by combining magnesium salicylate as a detergent with zirconium dioxide in the present invention is significantly better than the anti-oxidation performance of the grease composition prepared by combining magnesium cyclohexaneate, which also has a detergent effect, with zirconium dioxide. This shows that the combination of zirconium dioxide and magnesium salicylate improves the stable dispersion of zirconium dioxide in the lubricating oil composition system, further promotes its activity, and improves the high-temperature anti-oxidation and anti-wear performance of the overall system. In addition, by adding Figure 1 It can be seen that the hydrogen internal combustion engine lubricating oil composition prepared by using the raw materials of the present invention can still maintain excellent emulsification stability after being left to stand for 720 hours, that is, it has ultra-long emulsification stability performance.

[0067] In addition to the above embodiments, the special composite agent for hydrogen internal combustion engine of the present invention comprises, by weight, 20-30% base oil, 15-20% magnesium salicylate detergent, 25-30% dispersant, 10-15% viscosity index agent, 5-10% anti-wear and friction reducer, 5-10% antioxidant, 2-4% emulsion stabilizer and 0.3-0.5% pour point depressant. Preferably, the special composite agent for hydrogen internal combustion engine may comprise, by weight, 20.5-29.7% base oil, 15-20% magnesium salicylate detergent, 25-30% dispersant, 10-15% viscosity index agent, 5-10% anti-wear and friction reducer, 5-10% antioxidant, 2-4% emulsion stabilizer and 0.3-0.5% pour point depressant. The main antioxidant may be di-tert-butyl-p-cresol and / or dialkyl diphenylamine.

[0068] The lubricating oil composition for hydrogen internal combustion engines of the present invention comprises the following raw materials by weight: 78.0-83.0% of base oil, 10.0-13.0% of a special compounding agent for hydrogen internal combustion engines, 6.0-8.0% of a viscosity index agent, 0.3-0.5% of an anti-wear and friction reducer, and 0.3-0.5% of an emulsion stabilizer. Preferably, the lubricating oil composition for hydrogen internal combustion engines may comprise the following raw materials by weight: 78.2%-83.0% of base oil, 10.0-13.0% of a special compounding agent for hydrogen internal combustion engines, 6.0-8.0% of a viscosity index agent, 0.3-0.5% of an anti-wear and friction reducer, and 0.3-0.5% of an emulsion stabilizer.

[0069] That is, within the scope defined by the above-mentioned composite agent for hydrogen internal combustion engines and the lubricating oil composition for hydrogen internal combustion engines of the present invention, the technical effects of the present invention can be achieved, and thus, no further experiments are performed one by one to verify the above-mentioned embodiments.

Claims

1. A hydrogen internal combustion engine lubricating oil composition, characterized in that: The lubricating oil comprises the following raw materials by weight: The special composite agent for hydrogen internal combustion engines comprises, by weight, 20-30% of base oil, 15-20% of magnesium salicylate as a detergent, 25-30% of a dispersant, 10-15% of a viscosity modifier, 5-10% of an anti-wear and friction reducer, 5-10% of an antioxidant, 2-4% of an emulsion stabilizer and 0.3-0.5% of a pour point depressant; the antioxidant comprises 85-95% of a primary antioxidant and 5-15% of a secondary antioxidant zirconium dioxide.

2. The lubricating oil composition for a hydrogen internal combustion engine according to claim 1, characterized in that: The base oil is a base oil meeting API Class II, Class III, Class IV, Class V or a mixture thereof.

3. The lubricating oil composition for a hydrogen internal combustion engine according to claim 1, characterized in that: The dispersant is polyisobutylene succinimide and / or boronated bis-polyisobutylene succinimide.

4. The lubricating oil composition for a hydrogen internal combustion engine according to claim 1, characterized in that: The viscosity modifier is ethylene-propylene copolymer and / or polyhydrogenated styrene isoprene.

5. The lubricating oil composition for a hydrogen internal combustion engine according to claim 1, characterized in that: The anti-wear and friction reducing agent is dialkyl molybdenum dithiophosphate or dialkyl zinc dithiophosphate.

6. The lubricating oil composition for a hydrogen internal combustion engine according to claim 1, characterized in that: The main antioxidant is di-tert-butyl-p-cresol and / or dialkyl diphenylamine.

7. The lubricating oil composition for a hydrogen internal combustion engine according to claim 1, characterized in that: The emulsion stabilizer is polymethacrylate and / or polyoxypropylene lanolin alcohol ether.

8. The lubricating oil composition for a hydrogen internal combustion engine according to claim 1, characterized in that: The pour point depressant is alkyl naphthalene and / or fumarate.

9. A method for preparing the lubricating oil composition for a hydrogen internal combustion engine according to claim 1, characterized in that: The steps include: (1) Preparation of a special composite agent for hydrogen internal combustion engines: after mixing and stirring the base oil, the detergent magnesium salicylate and the antioxidant, a dispersant, a viscosity modifier, an anti-wear and friction reducer, an emulsion stabilizer and a pour point depressant are added, and the mixture is heated to 60-65° C. and stirred evenly to obtain a special composite agent for hydrogen internal combustion engines; (2) Preparation of an internal combustion engine lubricating oil composition: base oil, a special compound for hydrogen internal combustion engines, a viscosity modifier, an anti-wear and friction reducer, and an emulsion stabilizer are mixed and heated to 60-65° C., stirred evenly, and then filtered to obtain the lubricating oil composition.

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