Nanoscale mineral molybdenum disulfide lubricating oil and its application in marine engine

Abstract

The present application relates to a kind of nanometer molybdenum disulfide lubricating oil, the lubricating oil includes the following components: base oil 100 parts by weight;Nanoscale molybdenum disulfide 3-7 parts by weight, polyisobutyl succinimide, 0.9-1.7 parts by weight, high base value synthetic calcium sulfonate 0.5-1.1 parts by weight, polyisobutylene 0.7-1.2 parts by weight, alkyl naphthalene pour point depressant 1.1-3 parts by weight, 4-octyl-N-(4-octylphenyl) aniline 1.2-2.5 parts by weight, trimethylphenyl phosphate 1-1.5 parts by weight, docosanoic acid 1-3 parts by weight.The lubricating oil can prevent oil nozzle drip fuel damage oil film.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lubricating oil, in particular, the present application relates to a kind of nanometer mineral molybdenum disulfide lubricating oil and its application in marine engine. BACKGROUND

[0002] Marine engine lubricating oil is usually composed of base oil, additives and thickening agent. The base oil is the main component of lubricating oil, and its quality directly affects the performance of lubricating oil. Additives are used to improve the performance of lubricating oil, such as antioxidants, friction modifiers, etc. Thickening agent is used to keep the lubricating oil at a certain consistency, so as to form an effective lubricating oil film at the lubricating part.

[0003] With the development of ship technology and the improvement of environmental protection requirements, marine engine lubricating oil also needs continuous innovation and upgrading. For example, new marine engine lubricating oil needs to adapt to higher speed, higher temperature and lower emission requirements. At the same time, new materials and formulations need to be continuously explored to improve the performance and environmental protection of lubricating oil.

[0004] In the prior art, when the marine engine stops, the fuel will enter the cylinder due to negative pressure, dilute the oil film, and cause the oil film to lose its effect. When the engine starts again, direct contact between friction pairs will cause wear, resulting in cylinder and piston ring. This situation is common on ships and is a major safety hazard. SUMMARY

[0005] In order to solve the above problems, the present application provides a kind of nanometer mineral molybdenum disulfide lubricating oil, the lubricating oil includes the following components:

[0006] 100 parts by weight of base oil;

[0007] 3-7 parts by weight of nanometer mineral molybdenum disulfide

[0008] 0.9-1.7 parts by weight of polyisobutyl succinimide

[0009] 0.5-1.1 parts by weight of high base value synthetic calcium sulfonate

[0010] 0.7-1.2 parts by weight of viscosity index improver

[0011] 1.1-3 parts by weight of pour point depressant

[0012] 1.2-2.5 parts by weight of antioxidant

[0013] 1-1.5 parts by weight of phosphoric acid trimethylphenyl ester

[0014] 1-3 parts by weight of docosanoic acid

[0015] As a preferred technical solution, the base oil is one or any ratio combination of 150N, 250N, 350N and 500N.

[0016] As a preferred technical solution, the viscosity index improver is selected from one or more of ethylene-propylene copolymer, styrene isoprene copolymer, hydrogenated styrene-isoprene block copolymer and polyisobutylene.

[0017] As a preferred technical solution, the pour point depressant is selected from one or more of fumarate type pour point depressant, alkyl naphthalene pour point depressant, polymethacrylate pour point depressant and polyolefin pour point depressant.

[0018] As a preferred technical solution, the antioxidant is selected from one or more of 2,6-di-tert-butyl phenol, diisooctyl diphenylamine, N-phenyl-N-sec-butyl-p-phenylenediamine and 4-octyl-N-(4-octylphenyl) aniline.

[0019] As a preferred technical solution, the particle size of the nanoscale mineral molybdenum disulfide is 80-600nm.

[0020] As a preferred technical solution, the preparation method comprises the following steps:

[0021] 1. The hydrogenated base oil is pumped into the blending kettle through the filter pump, and gradually heated; polyisobutylene is added, stirred for 15-20min, and uniformly stirred;

[0022] 2. Add other additives, always keep the temperature of the previous step and stir for 30-45min, and uniformly stir until completely miscible;

[0023] 3. The nanoscale molybdenum disulfide mineral main agent is sequentially added into the blending kettle, the pulse blending is started, and the heating is started, and the blending is started to a certain temperature, and the stirring is uniform;

[0024] 4. Pulse blending for 40-60min until the blending is completed.

[0025] The application also relates to the application of the aforementioned nanoscale mineral molybdenum disulfide lubricating oil in a marine engine.

[0026] As a preferred technical solution, the nanoscale mineral molybdenum disulfide lubricating oil is applied in the marine engine negative pressure caused by the oil nozzle dripping fuel damage oil film.

[0027] As a preferred technical solution, the material of the marine engine is cast iron and cast aluminum.

[0028] The present application promotes the adhesion of molybdenum disulfide, and the molybdenum disulfide that has been adhered can effectively maintain good lubricating performance when the oil film is thin, protect the engine from normal and stable operation, avoid the hidden danger of cylinder and piston, improve the safety and reliability of the engine, and reduce the loss of property.

[0029] The present application will be described in detail below through examples, which do not mean any limitation to the present application.

[0030] Drawings

[0031] Figure 1 The electron microscope and energy spectrum analysis result chart of the cast aluminum ZL701A of Example 1.

[0032] Figure 2 The electron microscope and energy spectrum analysis result chart of the cast aluminum ZL701A of Example 2.

[0033] Figure 3 The electron microscope and energy spectrum analysis result chart of the cast aluminum ZL701A of Example 3.

[0034] Figure 4 The electron microscope and energy spectrum analysis result chart of the cast aluminum ZL701A of Example 4.

[0035] Figure 5 The electron microscope and energy spectrum analysis result chart of the cast iron QT400-15 of Example 1.

[0036] Figure 6 The electron microscope and energy spectrum analysis result chart of the cast iron QT400-15 of Example 2.

[0037] Figure 7 The electron microscope and energy spectrum analysis result chart of the cast iron QT400-15 of Example 3.

[0038] Figure 8 The electron microscope and energy spectrum analysis result chart of the cast iron QT400-15 of Example 4. DETAILED DESCRIPTION

[0039] The present application will be described in detail below through examples, which do not mean any limitation to the present application.

[0040] A nanoscale mineral molybdenum disulfide lubricating oil, the lubricating oil comprising the following components:

[0041] Base oil 100 parts by weight;

[0042] Nano-sized mineral molybdenum disulfide 3-7 parts by weight

[0043] Polyisobutyl succinimide 0.9-1.7 parts by weight

[0044] High base value synthetic calcium sulfonate 0.5-1.1 parts by weight

[0045] Polyisobutylene 0.7-1.2 parts by weight

[0046] Alkyl naphthalene pour point depressant 1.1-3 parts by weight

[0047] 4-octyl-N-(4-octylphenyl) aniline 1.2-2.5 parts by weight

[0048] Trimethylphenyl phosphite 1-1.5 parts by weight

[0049] Docosanoic acid 1-3 parts by weight.

[0050] As a preferred embodiment, the particle size of the nano-sized mineral molybdenum disulfide is 80-600 nm.

[0051] As a preferred embodiment, the preparation method comprises the following steps:

[0052] 1. Hydrogenated base oil is pumped into the blending kettle through a filter pump while gradually warming up; polyisobutylene is added, and stirring is carried out for 15-20 min, and the stirring is uniform;

[0053] 2. Other additives are added, and the temperature before is always maintained to stir for 30-45 min, and the stirring is uniform and completely miscible;

[0054] 3. The nano-sized mineral molybdenum disulfide main agent is sequentially added into the blending kettle, and the pulse blending is started while heating, and the blending is carried out to a certain temperature, and the stirring is uniform;

[0055] 4. Pulse blending is carried out for 40-60 min until the blending is completed.

[0056] The application also relates to the application of the aforementioned nano-sized mineral molybdenum disulfide lubricating oil in a marine engine.

[0057] As a preferred embodiment, the application of the nano-sized mineral molybdenum disulfide lubricating oil in the marine engine negative pressure caused fuel leakage damage to the oil film of the fuel injection nozzle.

[0058] As a preferred embodiment, the material of the marine engine is cast iron and cast aluminum.

[0059] Nano-sized mineral molybdenum disulfide: flaky 100 nanometers, Henan Yongfeng Molybdenum Industry Co., Ltd.

[0060] Other materials are commercially available.

[0061] Example 1

[0062] Base oil 100 parts by weight (mass ratio of hydrogenated base oil 150N and hydrogenated base oil 500N is 1:0.5) ; nanometer mineral molybdenum disulfide 5 parts by weight

[0063] Polyisobutyl succinimide parts by weight

[0064] High base value synthetic calcium sulfonate 1 part by weight

[0065] Polyisobutene 1 part by weight

[0066] Alkyl naphthalene pour point depressant 2 parts by weight

[0067] 4-octyl-N- (4-octylphenyl) aniline 2 parts by weight

[0068] Phosphoric acid trimethylphenyl ester 1 part by weight

[0069] Behenic acid 2 parts by weight.

[0070] Example 2

[0071] The same as example 1, without behenic acid.

[0072] Example 3

[0073] The same as example 1, without phosphoric acid trimethylphenyl ester.

[0074] Example 4

[0075] The same as example 1, using monobutyrylimide instead of phosphoric acid trimethylphenyl ester.

[0076] I. Taking cast aluminum ZL701A material as the research object, first soaking in the molybdenum disulfide lubricating oil (example 1-4) of the application for 5 days, then flushing the cast aluminum with 500ml of diesel oil, drying and analyzing the elements on the surface of the cast aluminum ZL701A material by electron microscopy and energy spectrum, the test picture is shown in the following figure Figures 1-4 , the test results of example 1-4 are as follows in order:

[0077] Disabled elements: N

[0078] Element Number Element Symbol Atomic Concentration 13 Al 43.1 70 Yb 9.2 14 Si 13.5 6 C 11.5 20 Ca 7.8 15 P 6.0 11 Na 4.7 16 S 1.8 42 Mo 2.4

[0079] Disabled elements: N

[0080] Element Number Element Symbol Atomic Concentration 13 Al 23.6 6 C 38.6 70 Yb 1.7 17 Cl 12.6 11 Na 12.1 14 Si 5.7 16 S 1.9 42 Mo 1.4 49 In 2.4

[0081] Disabled elements: N

[0082] Element Number Element Symbol Atomic Concentration 13 Al 81.4 70 Yb 18.6 16 S 0.0 42 Mo 0.0

[0083] Disabled elements:Cr,Dy,Fe,N,Pm,Zr

[0084] Element Number Element Symbol Atomic Concentration 6 C 72.2 13 Al 14.2 14 Si 11.6 16 S 1.1 42 Mo 0.9

[0085] Through experimental analysis, it is obtained that more molybdenum disulfide exists in the surface pits by using dodecanoic acid and phosphoric acid trimethylphenol ester, which shows that the composition of the application strengthens the adsorption of molybdenum disulfide on the surface of cast aluminum.

[0086] Secondly, cast iron QT400-15 is taken as the research object, firstly, the cast iron is soaked in the molybdenum disulfide lubricating liquid (Example 1-4) of the application for 5 days, then the cast iron is flushed with 500ml diesel oil, and after drying, the elements on the surface of the cast iron QT400-15 material are analyzed by using electron microscope and energy spectrum, and the test picture is shown in the following figure: Figures 5-8 The test results of Example 1-4 are as follows in order:

[0087] Disabled elements:N

[0088] Element Number Element Symbol Atomic Concentration 17 Cl 12.6 26 Fe 48.7 6 C 11.0 35 Br 4.3 74 W 3.4 20 Ca 8.9 37 Rb 1.9 42 Mo 3.5 78 Pt 2.4 94 Pu 3.3

[0089] Disabled elements:Dy,N,Yb

[0090] Element Number Element Symbol Atomic Concentration 6 C 21.4 26 Fe 59.8 14 Si 5.7 15 P 6.6 38 Sr 1.6 16 S 2.1 42 Mo 1.7 25 Mn 1.1

[0091] Disabled elements:N

[0092] Element Number Element Symbol Atomic Concentration 17 Cl 17.9 6 C 15.7 45 Rh 4.7 26 Fe 35.0 16 S 6.6 19 K 8.6 42 Mo 0.1 74 W 2.0 11 Na 9.4

[0093] Disabled elements:N

[0094]

[0095]

[0096] Through experimental analysis, it is obtained that more molybdenum disulfide exists in the surface pits by using dodecanoic acid and phosphoric acid trimethylphenol ester, which shows that the composition of the application strengthens the adsorption of molybdenum disulfide on the surface of cast iron.

[0097] By comparing the adsorption conditions of the cast iron surface and the cast aluminum surface, the composition of the application is more likely to promote the adsorption of molybdenum disulfide in the pits of cast aluminum, and the molybdenum disulfide on the surface of cast iron is more likely to be adsorbed in the pits of cast iron.

[0098] Definitions and explanations:

[0099] Unless otherwise indicated herein, the following terms or phrases used herein are intended to have the following meanings. No particular phrase or term should be construed as indefinite or unclear unless specifically defined, but should be construed in accordance with the ordinary meaning. When a trade name appears herein, it is intended to refer to its corresponding product or active ingredient thereof.

[0100] The intermediate compounds of the present application can be prepared by a variety of synthetic methods well known to those skilled in the art, including the specific embodiments set forth below, embodiments formed by a combination of the specific embodiments with other chemical synthetic methods well known to those skilled in the art, and equivalents thereof as appreciated by those skilled in the art, preferred embodiments including but not limited to the examples of the present application.

[0101] The chemical reactions of the specific embodiments of the present application are performed in solvents appropriate to the reagents and materials employed and suitable for the transformations being effected. In the event that solvents are not specifically mentioned, the reaction can be performed in any solvent or mixture of solvents of choice. In order to obtain the compounds of the present application, it can be necessary to modify or select the synthetic steps or reaction sequences on the basis of the known art to those skilled in the art.

[0102] While the foregoing describes specific embodiments of the present application, one of ordinary skill in the art will readily understand that the application is not limited to these embodiments, and that various modifications and changes can be made thereto without departing from the spirit and scope of the present application. Accordingly, the scope of the present application is defined only by the appended claims.

Claims

1. An application of a nano-scale mineral molybdenum disulfide lubricant in treating oil film damage caused by fuel leakage from a fuel injector due to negative pressure in a marine engine, characterized in that: The lubricating oil is composed of the following components: 100 parts by weight of base oil; 3-7 parts by weight of nano-scale mineral molybdenum disulfide; 0.9-1.7 parts by weight of polyisobutylene bissuccinimide; 0.5-1.1 parts by weight of overbased synthetic calcium sulfonate; 0.7 to 1.2 parts by weight of polyisobutylene, a viscosity index improver; 1.1 to 3 parts by weight of pour point depressant; 1.2-2.5 parts by weight of antioxidant; 1-1.5 parts by weight of tricresyl phosphate; 1-3 parts by weight of behenic acid; The material of the marine engine is cast aluminum; The base oil is one of 150N, 250N, 350N, and 500N, or any combination thereof; The nano-scale mineral molybdenum disulfide is in the form of flakes with a particle size of 80-600 nm; The preparation method of the lubricating oil is: Pump the base oil into the blending kettle through the filter pump and gradually heat it up; add polyisobutylene and stir for 15-20 minutes until it is evenly mixed; Add polyisobutylene bis(succinimide), high base synthetic calcium sulfonate, pour point depressant, antioxidant, tricresyl phosphate, and behenic acid, and stir for 30-45 minutes while maintaining the above temperature until the mixture is evenly mixed and completely dissolved. Add nano-scale mineral molybdenum disulfide into the blending kettle, start pulse blending, heat at the same time, blend to a certain temperature, and stir evenly; Pulse blending for 40-60 minutes until the mixture is evenly mixed.

2. The use of a nano-scale mineral molybdenum disulfide lubricant according to claim 1 in treating the oil film damaged by fuel dripping from the fuel injector due to negative pressure in a marine engine, characterized in that: The pour point depressant is selected from one or more of a fumarate pour point depressant, an alkyl naphthalene pour point depressant, a polymethacrylate pour point depressant, and a polyolefin pour point depressant.

3. The use of a nano-scale mineral molybdenum disulfide lubricant according to claim 1 in treating the oil film damaged by fuel dripping from the fuel injector due to negative pressure in a marine engine, characterized in that: The antioxidant is selected from one or more of 2,6-di-tert-butylphenol, diisooctyldiphenylamine, N-phenyl-N-sec-butyl-p-phenylenediamine, and 4-octyl-N-(4-octylphenyl)aniline.

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