Environment-friendly lubricating oil and preparation method and application thereof

Abstract

The present application relates to the technical field of lubricating oil production, and discloses an environment-friendly lubricating oil and a preparation method and application thereof, and belongs to the technical field of lubricating oil, wherein the lubricating oil developed by the present application comprises the following raw materials in percentage by weight: neopentyl polyol NPE-3: 50-65%, vegetable oil: 10-15%, surfactant: 5-15%, antioxidant: 5-8%, anti-wear agent: 5-10%, and preservative: 2-4%. By combining the environment-friendly base oil with the pollution-free and low-toxic lubricating oil additive, the load capacity and lubricating effect of the lubricating oil are effectively improved, and the lubricating oil has the advantages of environment friendliness, non-toxicity and harmlessness.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lubricating oil production, and more particularly to an environment-friendly lubricating oil and a preparation method and application thereof. BACKGROUND

[0002] Lubricating oil is a liquid or semi-solid used on various types of automobiles and mechanical equipment to reduce friction, protect machinery and workpieces. Lubricating oil mainly plays the roles of lubrication, cooling, rust prevention, cleaning, sealing, etc. Lubricating oil is generally composed of base oil and additives. The base oil is the main component of lubricating oil and determines the basic properties of lubricating oil, and the additives can make up for and improve the performance of the base oil and impart new properties to the lubricating oil, which is an important component of lubricating oil.

[0003] Base oil is mainly divided into two categories of mineral oil and synthetic oil. Its specific functions are to lubricate metal parts, reduce friction between parts, carry away the huge heat generated by the engine during work, clean fine metal debris generated after wear, and have the functions of sealing, shock absorption, rust prevention, etc. However, synthetic oil products must be used in some applications, thus leading to the rapid development of synthetic oil.

[0004] At present, there are various types of mineral lubricating oils with different formulations in the field, but they are not biodegradable and have certain toxicity or poor lubrication effect, so how to provide a lubricating oil that is biodegradable, environmentally friendly, low-toxic or non-toxic, and has high load capacity has become a problem to be solved by personnel in the field. SUMMARY

[0005] Therefore, the present application provides an environment-friendly lubricating oil and a preparation method and application thereof, which effectively improves the environmental protection effect and lubrication performance of the lubricating oil from the perspective of optimizing the components of the lubricating oil raw materials, and has the advantages of low toxicity and non-toxicity.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] An environment-friendly lubricating oil, characterized in that it comprises the following components by weight ratio:

[0008] Neopentyl polyol NPE-3: 50-65%, vegetable oil 10-15%, surfactant 5-15%, antioxidant 5-8%, anti-wear agent 5-10%, preservative 2-4%.

[0009] Further, the vegetable oil is any one or a combination of more than one of sunflower oil, castor oil, and rapeseed oil.

[0010] The beneficial effects of the above technical solution are that the plant oil as one of the base oils can meet the actual use requirements of the lubricating oil and has the environmental protection characteristics, and even if it is discarded or leaked accidentally, it can be decomposed under natural conditions and will not pollute the environment or be toxic.

[0011] Further, the surfactant includes any one or a combination of two of oleic acid diethanolamide and lauric acid diethanolamide.

[0012] The beneficial effects of the above technical solution are that the alkanolamide substance can reduce the oil-water interfacial tension, can improve the physical and chemical indexes of the oil product, and make the lubricating oil have the functions of rust prevention, corrosion prevention, anti-foam, defoaming, etc., can also improve the oxidation stability of the lubricating oil, and improve the low-temperature fluidity thereof.

[0013] Further, the anti-wear agent includes any one or a combination of two of octadecylthio calcium nanoborate, nitrogen borate ester, and phosphorus star.

[0014] The beneficial effects of the above technical solution are that the octadecylthio calcium nanoborate is compounded by a friction modifier, an anti-metal corrosion agent, and an antioxidant, and has good extreme pressure and anti-wear properties and good thermal oxidation stability, and is a new type of environmentally friendly extreme pressure and anti-wear agent.

[0015] The phosphorus star 120 has excellent anti-wear effect, can form a dense surface film on the surface of the friction material under high pressure, thereby reducing wear and prolonging the service life of the parts, and has the advantages of low toxicity and environmental protection.

[0016] Further, the antioxidant is 2,6-di-tert-butyl mixed p-cresol.

[0017] The beneficial effects of the above technical solution are that the molecular formula of 2,6-di-tert-butyl p-cresol is C 15 H 24 O, which is a white crystal, turns yellow in color when exposed to light and gradually becomes darker, has good antioxidant properties, can effectively prolong the induction period, is an excellent antioxidant additive for various petroleum products, has good oil solubility, and does not affect the color of the oil product after being added.

[0018] Further, the corrosion inhibitor is potassium sorbate.

[0019] A preparation method of the lubricating oil is characterized in that the preparation method is as follows:

[0020] 1) Take neopentyl polyol NPE-3 and vegetable oil into a reaction kettle, heat to 50 DEG C, mix uniformly, and obtain mixture 1;

[0021] 2) Add surfactant, antioxidant, anti-wear agent to mixture 1, continue to heat to 60 DEG C, mix uniformly, and obtain mixture 2;

[0022] 3) Add preservative to mixture 2, stir uniformly, stop heating, and cool to room temperature, and the lubricating oil is obtained.

[0023] The lubricating oil is applied to protect various mechanical equipment, especially agricultural product processing, food machinery and tablet press pharmaceutical equipment and prevent mechanical equipment wear.

[0024] The above technical scheme has the beneficial effects that:

[0025] The present application combines various components to develop a lubricating oil with good bearing capacity, good lubricating effect, good environmental performance, low toxicity and excellent comprehensive performance, and the preparation method is simple, easy to realize industrialized production, and has the advantages of good practical application effect. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the real-time example or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can obtain other drawings according to the provided long-time wear steel ball wear track test results without creative labor.

[0027] Figure 1 Figure 1 is an electron microscope image of the surface wear track of the long-time wear test steel ball;

[0028] Figure 2 Figure 2 is an electron microscope image of the surface wear track of the long-time wear test steel ball;

[0029] Figure 3 Figure 3 is an electron microscope image of the surface wear track of the long-time wear test steel ball;

[0030] Figure 4 Figure 4 is an electron microscope image of the surface wear track of the long-time wear test steel ball;

[0031] Figure 5 Figure 1 is an electron microscope image of the surface wear track of the long-time wear test steel ball;

[0032] Figure 6 Figure 2 is an electron microscope image of the surface wear track of the long-time wear test steel ball;

[0033] Figure 7 Figure 3 is an electron microscope image of the surface wear track of the steel ball after the long time wear test.

[0034] Note: (Test conditions: Load F = 392 N, Time T = 60 min) DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0036] The adding range of each component is as follows:

[0037]

[0038]

[0039] Example 1

[0040] A lubricating oil comprises the following components by weight percentage: neopentyl polyol NPE-3: 65%, sunflower oil: 15%, oleic acid diethanolamide: 5%, octadecylthio nano calcium borate: 5%, 2,6-di-tert-butyl mixed-p-cresol: 5%, phosphorus star 120: 3%, potassium sorbate: 2%.

[0041] Example 2

[0042] A lubricating oil comprises the following components by weight percentage: neopentyl polyol NPE-3: 60%, castor oil: 10%, lauric acid diethanolamide: 10%, octadecylthio nano calcium borate: 5%, phosphorus star 3%, 2,6-di-tert-butyl mixed-p-cresol: 8%, potassium sorbate: 4%.

[0043] Example 3

[0044] A lubricating oil comprises the following components by weight percentage: neopentyl polyol NPE-3: 55%, rapeseed oil: 15%, oleic acid diethanolamide: 5%, lauric acid diethanolamide: 5%, octadecylthio nano calcium borate: 5%, phosphorus star: 5%, 2,6-di-tert-butyl mixed-p-cresol: 7%, potassium sorbate: 3%.

[0045] Example 4

[0046] A lubricating oil comprising the following components by weight percentage: Neopentyl polyol NPE-3: 50%, sunflower oil: 5%, castor oil: 5%, rapeseed oil: 5%, oleic acid diethanolamide: 5%, lauric acid diethanolamide: 10%, 2,6-di-tert-butyl mixed-p-cresol: 7%, nitrogen-containing borate: 10%, phosphorus star 120: 5%, potassium sorbate: 3%.

[0047] Comparative Example 1

[0048] A commercially available lubricating oil comprising the following components: base oil, diethyl phosphite and dibutyl phosphite.

[0049] Comparative Example 2

[0050] An environmentally friendly lubricating oil comprising the following components by percentage: Neopentyl polyol NPE-3: 50%, sunflower oil: 10%, castor oil: 10%, rapeseed oil: 10%, oleic acid diethanolamide: 5%, 2,6-di-tert-butyl mixed-p-cresol: 5%, nitrogen-containing borate: 5%, potassium sorbate: 5%.

[0051] Comparative Example 3

[0052] An environmentally friendly lubricating oil comprising the following components by percentage: Neopentyl polyol NPE-3: 50%, rapeseed oil: 20%, 2,6-di-tert-butyl mixed-p-cresol: 14%, nitrogen-containing borate: 10%, phosphorus star 120: 5%, potassium sorbate: 1%.

[0053] Example 5

[0054] The physicochemical properties of the lubricating oil developed by the present application were detected using the components described in Example 4 as an example, and the detection results are shown in Table 1:

[0055] Table 1 Performance detection results of the lubricating oil of Example 3

[0056] Item Unit Quality index Test method Result Appearance Transparency Visual observation Pale yellow oily transparent liquid Kinematic viscosity mm 2 / S]]> 14 GB / T 265 5 Mechanical impurities ％ None GB / T 511 None Flash point (open) ℃ 120 GB / T 3536 156 Moisture ％ None GB / T 260 None Pour point ℃ -10 GB / T 3536 -25 CCS low temperature viscosity mPa.s ≤3500 GB / T 6538 Pass Maximum non-galling load N 1392 GB / T 3142

[0057] As can be seen from Table 1, the lubricating oil prepared by the present application has good load bearing capacity, good lubricating effect, good low-temperature resistance, good high-temperature resistance, and excellent comprehensive performance.

[0058] Example 6 Stability experiment

[0059] The lubricating oil in Examples 1-4 and Comparative Examples 1-3 was respectively filled into a triangular bottle, a bottle plug was plugged, after being shaken violently, the triangular bottle was placed in an oven with a constant temperature of 105±3℃ for 8h, the triangular bottle was taken out and cooled to room temperature, the triangular bottle was shaken violently for 1min, then the lubricating oil was quickly poured into a clean centrifuge tube to the 50ml scale line, the centrifuge tube was placed in a constant temperature bath with a temperature of 90±3℃ for 5min, and centrifuged at 600r / min for 30min, the centrifuge tube was taken out, and whether the lubricating oil appeared stratification, turbidity or precipitation was observed, and the results are shown in Table 2.

[0060] Dispersibility: the dispersibility was observed after standing for 72h, and the results are shown in Table 2.

[0061] The biodegradation rates of Examples 1-4 and Comparative Examples 1-3 were determined, and the results are shown in Table 2.

[0062] Table 2: Results of determination of stability and environmental protection of lubricating oil

[0063] Sample Stability test result Dispersibility test result Biodegradation rate Example 1 No delamination, turbidity or precipitation phenomenon Uniform, stable and no delamination 90.7％ Example 2 No delamination, turbidity or precipitation phenomenon Uniform, stable and no delamination 91.4％ Example 3 No delamination, turbidity or precipitation phenomenon Uniform, stable and no delamination 87.9％ Example 4 No delamination, turbidity or precipitation phenomenon Uniform, stable and no delamination 92.3％ Comparative Example 1 Delamination, precipitation Slightly delaminated 56.8％ Comparative Example 2 Slightly turbid Slightly delaminated 78.2％ Comparative Example 3 Delamination, precipitation Obvious delamination 60.4％

[0064] As can be seen from Table 2 of the present application, compared with the commercially available lubricating oil, the lubricating oil of the present application has excellent stability performance, is not easy to appear turbidity or precipitation, and is not easy to stratify after standing. Moreover, the biodegradation rate is high, which can reach 92.3%, and has the advantages of environmental protection and easy degradation.

[0065] Example 6: Long grinding test

[0066] The wear resistance of the lubricating oil of Examples 1-4 and Comparative Examples 1-3 was determined according to GB / T3142-1982(2004) "Lubricant Load Capacity Test Method (Four Ball Method)", and the determination results are shown in Table 3 and the attached Figure 1-7 .

[0067] Table 3

[0068]

[0069] As can be seen from Table 3 and the attached Figure 1-4 Long grinding wear scar morphology, it can be seen that the lubricating oil prepared by Examples 1-4 has good smoothness, small wear scar, and the wear scar diameter is about 0.3mm, and the minimum value is 0.294mm; the wear scar is thin and shallow, and there is no obvious furrow. Figure 5-7 Corresponding to Comparative Examples 1-3, the wear scar is large, which is 0.38mm, 0.39mm and 0.41mm; and it presents parallel arranged furrows, and the scratch is obvious, which shows that the lubricating oil obtained by the lubricating oil additive of the present application has small steel ball friction coefficient, which plays a good repairing role on the surface, and improves the anti-wear and wear reduction performance of the oil sample.

[0070] The various embodiments described in this specification are intended to be illustrative only and in no way limit the scope of the application. Changes and modifications can be made by those skilled in the art, which employ the principles of the application, without departing from the scope of the application. Accordingly, the application is not limited to the embodiments described herein, but instead has scope to encompass any choice whatsoever that is dependent on, or can be substituted in, the principal, new and inventive features that are described and defined by the appended claims.

[0071] The above description of disclosed embodiments is intended to be illustrative only and not limiting of the application. Numerous modifications to these embodiments can be made by those skilled in the art without departing from the spirit or scope of the application. The scope of the application is not limited to the embodiments described herein, but instead is intended to encompass any and all changes and modifications that are within the scope of the claims.

Claims

1. An environmentally friendly lubricating oil, characterized by, Comprising the following components by weight percentage: Neopentyl polyol ester NPE-3 50-65%, vegetable oil 10-15%, surfactant 5-15%, antioxidant 5-8%, anti-wear agent 5-10%, preservative 2-4%; The vegetable oil is any one or a combination of more than one of sunflower oil, castor oil, rapeseed oil; The surfactant includes any one or a combination of both of oleic acid diethanolamide, lauric acid diethanolamide; The anti-wear agent includes any one or a combination of both of nitrogen-containing borate and phosphorus star 120; The antioxidant is 2,6-di-tert-butyl mixed-p-cresol; The preservative is potassium sorbate.

2. The method of producing a lubricating oil according to claim 1, characterized by, The preparation method is as follows: 1) Weigh neopentyl polyol ester and vegetable oil into a reaction kettle, heat to 50°C, mix uniformly to obtain mixture 1; 2) Add surfactant, antioxidant and anti-wear agent to mixture 1, continue to heat to 60°C, mix uniformly to obtain mixture 2; 3) Add preservative to mixture 2, stir uniformly, stop heating, cool to room temperature, and the lubricating oil is obtained.

3. Application of the lubricating oil prepared by the preparation method of claim 2 in protecting mechanical equipment; the mechanical equipment is used for processing agricultural products.

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