A lubricating oil, its preparation method and use, and method of use

Abstract

This invention belongs to the field of lubricating oil preparation technology, and relates to a lubricating oil, its preparation method, application, and usage method. By volume percentage, it comprises the following components: 10-99.99% lithium-based grease and 0.01-90% anti-wear hydraulic oil; wherein the lithium-based grease has a 0.1mm working cone penetration of less than 500, preferably 310-340; the anti-wear hydraulic oil has a flash point of not less than 185℃, preferably 230-250℃, and a kinematic viscosity of 41.4 mm at 40℃. 2 / s~50.6mm 2 / s. The present invention has the following beneficial effects: The lubricating oil of the present invention includes lithium-based grease and anti-wear hydraulic oil. By adjusting the mixing ratio of lithium-based grease and anti-wear hydraulic oil, it can be adapted to use at different temperatures, solving the problem of lubricating oil of loading arm motor concentrating into a clump during use, and greatly reducing the failure rate of loading arm.

Description

Technical Field

[0001] This invention belongs to the field of lubricating oil preparation technology, specifically relating to a lubricating oil and its preparation method, application, and usage. Background Technology

[0002] Loading arms are specialized equipment used in the petrochemical industry for loading and unloading fluids. They are mobile devices used to transfer liquid media between trains, tank cars, and pipelines on trestles. Loading arms mainly consist of a motor assembly, a vertical pipe traction actuator, a trolley traction drive assembly, and a vertical pipe assembly. Currently, the Cangzhou Refining & Chemical Company's storage and transportation department has 56 sets of closed-loop gasoline loading arms at its trestles, all with a truss-type structure and driven by pneumatic motors.

[0003] High failure rate of loading arms is a major problem currently existing in the industry. The high failure rate is mainly due to: the vertical pipe in the loading arm failing to lift or lower properly, or operating incorrectly; damage or aging of the airbag and sealing cap; wire rope entanglement; and malfunction of the moving trolley. Statistics show that vertical pipe failures account for 85% of all failures. It can be said that vertical pipe failure is the primary problem with loading arms. High loading arm failure rates affect gasoline product delivery: causing significant oil and gas leaks, resulting not only in environmental pollution but also in waste of refined oil due to the inability to recover the oil and gas. Furthermore, it poses safety risks: increasing the workload for loading personnel in the storage and transportation department and for Bohai Machinery repair personnel, especially during winter nighttime maintenance, where working at heights presents safety hazards.

[0004] The motor is the power source for loading arms in train loading operations, and its proper functioning directly determines the success or failure of the vertical extension and retraction process. Lithium-based grease is generally used as the motor lubricant; however, during use, it is frequently found that the vertical extension of the loading arm cannot rise and fall normally. Disassembly and inspection reveal that the grease inside the motor has solidified into a clump, essentially losing its lubricating effect, especially in extremely cold winter conditions, where this occurs very frequently.

[0005] To address the high failure rate of loading arms, it is urgent to develop a high-flowability and low-temperature resistant lubricating oil for loading arm motors. Summary of the Invention

[0006] In order to solve the above-mentioned problems of the prior art, the purpose of the present invention is to provide a lubricating oil and its preparation method and application and usage method. The lubricating oil can be used at different temperatures, solves the problem of lubricating oil in loading arm motors congealing into a clump during use, and significantly reduces the failure rate of loading arms.

[0007] To achieve the above objectives, a first aspect of the present invention provides a lubricating oil comprising, by volume percentage:

[0008] Lithium-based grease 10~99.99% and anti-wear hydraulic oil 0.01~90%;

[0009] The lithium-based grease has a working cone penetration of less than 500 mm (0.1 mm), preferably 310-340 mm.

[0010] The anti-wear hydraulic oil has a flash point of not less than 185℃, preferably 230~250℃, and a kinematic viscosity of 41.4 mm at 40℃. 2 / s~50.6mm 2 / s.

[0011] A second aspect of the present invention provides a method for preparing the aforementioned lubricating oil, comprising the following steps:

[0012] The lithium-based grease is heated to 70-90°C, anti-wear hydraulic oil is added, and the mixture is stirred and reacted for 1-2 hours. The mixture is then cooled to obtain the lubricating oil.

[0013] A third aspect of the invention provides the application of the aforementioned lubricating oil in an arm-mounted motor.

[0014] A fourth aspect of the present invention provides a method for using the lubricating oil in an arm-loading motor, comprising the following steps: preparing the lubricating oil according to the preparation method and injecting it into the arm-loading motor;

[0015] Preferably, when the ambient temperature is below -10℃, the volume ratio of anti-wear hydraulic oil to lithium-based grease is (3~4):1;

[0016] When the ambient temperature is -10℃ to 30℃, the volume ratio of anti-wear hydraulic oil to lithium-based grease is (1~3):1;

[0017] When the ambient temperature is above 30°C, the volume ratio of anti-wear hydraulic oil to lithium-based grease is (0.01~1):1, preferably (0.05~0.1):1.

[0018] The present invention has the following beneficial effects:

[0019] (1) The lubricating oil of the present invention includes lithium-based grease and anti-wear hydraulic oil. By adjusting the mixing ratio of lithium-based grease and anti-wear hydraulic oil, it can be adapted to use at different temperatures, which solves the problem of the lubricating oil of the loading arm motor condensing into a clump during use and greatly reduces the failure rate of the loading arm.

[0020] (2) The lubricating oil of the present invention contains antifreeze added to the anti-wear hydraulic oil, which further improves the fluidity and low temperature resistance of the motor lubricating oil and solves the problem of high failure frequency of loading arm motor lubricating oil in extremely cold winter conditions.

[0021] Other features and advantages of the present invention will be described in detail in the following detailed description section. Detailed Implementation

[0022] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0023] To achieve the above objectives, a first aspect of the present invention provides a lubricating oil comprising, by volume percentage:

[0024] Lithium-based grease 10~99.99% and anti-wear hydraulic oil 0.01~90%;

[0025] The lithium-based grease has a working cone penetration of less than 500 mm (0.1 mm), preferably 310-340 mm.

[0026] The anti-wear hydraulic oil has a flash point of not less than 185℃, preferably 230~250℃, and a kinematic viscosity of 41.4 mm at 40℃. 2 / s~50.6mm 2 / s.

[0027] According to the present invention, preferably, the lubricating oil comprises the following components by volume percentage: 20-95% lithium-based grease and 5-80% anti-wear hydraulic oil.

[0028] According to the present invention, preferably, the lithium-based grease comprises, by weight, the following parts: 80-97 parts base oil, 2-15 parts lithium-based thickener, and 1-5 parts lithium-based grease additive; preferably, the lithium-based grease comprises the following components by weight: 85-95 parts base oil, 5-10 parts lithium-based thickener, and 3-5 parts lithium-based grease additive.

[0029] According to the present invention, preferably, the anti-wear hydraulic oil comprises, by weight, the following parts: 80-95 parts base oil, 1-8 parts hydraulic oil additives, 1-6 parts other anti-wear hydraulic oil additives, and 1-12 parts antifreeze; preferably, the anti-wear hydraulic oil comprises the following components by weight: 85-90 parts base oil, 2-5 parts hydraulic oil additives, 3-5 parts other anti-wear hydraulic oil additives, and 6-10 parts antifreeze.

[0030] According to the present invention, preferably, the base oils of both the lithium-based grease and the anti-wear hydraulic oil are paraffinic base oils, and preferably, the viscosity of the paraffinic base oil is 9-11 mm. 2 / s.

[0031] In this invention, the paraffinic base oil may be selected from, but is not limited to, at least one of CNOOC -20℃ transformer oil, Handi Sunshine 60N, Maoming Petrochemical 10# white oil, and Shuanglong 70N.

[0032] According to the present invention, preferably, the lithium-based thickener is a lithium salt of fatty acids, and more preferably, the fatty acid is stearic acid and / or 12-hydroxystearic acid.

[0033] According to the present invention, preferably, the lithium-based grease additive includes an antioxidant, an extreme pressure agent, a corrosion inhibitor, and a viscosity modifier; the antioxidant is an amine antioxidant and / or a phenolic antioxidant, preferably, the amine antioxidant is dialkyldiphenylamine, and the phenolic antioxidant is 2,6-di-tert-butyl-p-cresol; the extreme pressure agent is selected from at least one of borates, borate esters, zinc dialkyldithiophosphate, molybdenum dialkyldithiocarbamate, and sulfurized olefins; the corrosion inhibitor is selected from at least one of benzotriazole, benzotriazole derivatives, and thiadiazole derivatives; and the viscosity modifier is an ethylene-propylene copolymer.

[0034] According to the present invention, preferably, the hydraulic oil additive comprises: C15-C50 deeply refined mineral oil, zinc alkyl dithiophosphate, hindered alkylphenol, calcium salicylate sulfide, aralkyl polyether, sulfurized branched alkylphenol calcium, branched alkylphenol calcium, and dialkylcycloalkyl sulfonate zinc; preferably, the mass ratio of the C15-C50 deeply refined mineral oil, zinc alkyl dithiophosphate, hindered alkylphenol, calcium salicylate sulfide, aralkyl polyether, sulfurized branched alkylphenol calcium, branched alkylphenol calcium, and dialkylcycloalkyl sulfonate zinc is (19~21):(39~41):(2.5~3.5):(1.5~2.5):(1.5~2.5):(0.3~0.5):1.

[0035] According to the present invention, preferably, the other anti-wear hydraulic oil additives include metal deactivators, pour point depressants, and extreme pressure anti-wear agents; the pour point depressant is a polymethacrylate solution; the metal deactivator is selected from at least one of benzotriazole derivatives, thiadiazole derivatives, and organic amines; the extreme pressure anti-wear agent is selected from at least one of phosphate esters, phosphites, organic sulfides, phosphorus-nitrogen compounds, sulfur-phosphorus-nitrogen compounds, and organic chlorides.

[0036] According to the present invention, preferably, the antifreeze is at least one selected from ethylene glycol, polyvinyl alcohol, polyisobutylene, methyl methacrylate and sodium dodecyl sulfonate; preferably sodium dodecyl sulfonate.

[0037] A second aspect of the present invention provides a method for preparing the aforementioned lubricating oil, comprising the following steps:

[0038] The lithium-based grease is heated to 70-90°C, anti-wear hydraulic oil is added, and the mixture is stirred and reacted for 1-2 hours. The mixture is then cooled to obtain the lubricating oil.

[0039] In this invention, the obtained lubricating oil is a brownish-yellow grease that has slight flowability at room temperature.

[0040] According to the present invention, preferably, it further includes the following steps:

[0041] (1) Preparation of lithium-based grease: Take a portion of the base oil and heat it to 80~90℃, add lithium-based thickener to thicken it, after thickening, stir and heat to 190~220℃, add the remaining paraffin-based base oil, cool down to 80~100℃, add lithium-based grease additive and antifreeze, stir evenly, and cool to obtain the lithium-based grease; wherein, the ratio of a portion of the base oil to the remaining base oil is (2~4):1;

[0042] (2) Preparation of anti-wear hydraulic oil: Mix base oil, hydraulic oil additive, anti-wear hydraulic oil additive and antifreeze, heat to 70~80℃, stir and react for 4~5 hours, and cool to obtain the anti-wear hydraulic oil.

[0043] A third aspect of the invention provides the application of the aforementioned lubricating oil in an arm-mounted motor.

[0044] A fourth aspect of the present invention provides a method for using the lubricating oil in an arm-mounted loading arm, comprising the following steps: preparing the lubricating oil according to the preparation method and injecting it into the arm-mounted loading arm.

[0045] According to the present invention, preferably, when the ambient temperature is below -10°C, the volume ratio of anti-wear hydraulic oil to lithium-based grease is (3~4):1; at room temperature, the lubricating oil can be seen to have slight flow, and after mixing, when picked up with a stick, it is in the form of strands, and the working cone penetration is 448mm~458mm.

[0046] When the ambient temperature is -10℃ to 30℃, the volume ratio of anti-wear hydraulic oil to lithium-based grease is (1~3):1; at room temperature, the lubricating oil can be seen to flow slightly. After mixing, when picked up with a stick, it is stringy, and the working cone penetration is 428mm~448mm.

[0047] When the ambient temperature is above 30℃, the volume ratio of anti-wear hydraulic oil to lithium-based grease is (0.01~1):1, preferably (0.05~0.1):1. At room temperature, the lubricating oil can be seen to have slight flow. After mixing, when picked up with a stick, it forms a stringy texture, and the working cone penetration is 310mm~428mm.

[0048] In this invention, the obtained lubricating oil is a brownish-yellow grease that has slight flowability at room temperature.

[0049] The present invention will be further described below with reference to the embodiments, but the scope of the present invention is not limited to these embodiments.

[0050] The performance testing standards for lubricating oils are based on GB / T3142-1982(2004) and GB / T269-1991.

[0051] The hydraulic oil additive is prepared in the following proportions: C15-C50 deep refined mineral oil, zinc alkyl dithiophosphate, hindered alkylphenol, calcium salicylate sulfide, aralkyl polyether, sulfurized branched alkylphenol calcium, branched alkylphenol calcium and dialkylcycloalkyl sulfonate zinc in a mass ratio of 20:40:3:2:2:0.4:1.

[0052] Example 1

[0053] Preparation of lithium-based grease: Take 60g of Maoming Petrochemical's No. 10 white oil and heat it to 80~90℃. Add 8g of lithium 12-hydroxystearate salt for thickening. After thickening, stir and heat to 190~220℃. Add 30g of Maoming Petrochemical's No. 10 white oil. Cool down to 80~100℃. Add 0.2g of 2,6-di-tert-butyl-p-cresol, 0.7g of borate ester, 0.8g of benzotriazole and 0.4g of ethylene-propylene copolymer and stir evenly. Cool to obtain the lithium-based grease.

[0054] Preparation of anti-wear hydraulic oil: 88g of Maoming Petrochemical's No. 10 white oil, 4g of hydraulic oil additive, 0.3g of polymethyl methacrylate solution, 0.8g of thiadiazole derivative compound, 1g of phosphorus nitrogen compound and 7g of sodium dodecyl sulfonate are mixed, heated to 70~80℃, stirred and reacted for 4~5 hours, and cooled to obtain the anti-wear hydraulic oil.

[0055] Take 40ml of lithium-based grease, heat it to 70~90℃, add 80ml of anti-wear hydraulic oil, stir and react for 1~2 hours, and cool to obtain the lubricating oil.

[0056] Example 2

[0057] The only difference from Example 1 is that 26.7 ml of lithium-based grease is heated to 70-90°C, 80 ml of anti-wear hydraulic oil is added, the mixture is stirred and reacted for 1-2 hours, and then cooled to obtain the lubricating oil.

[0058] Example 3

[0059] The only difference from Example 1 is that 20 ml of lithium-based grease is heated to 70-90°C, 80 ml of anti-wear hydraulic oil is added, the mixture is stirred and reacted for 1-2 hours, and then cooled to obtain the lubricating oil.

[0060] Example 4

[0061] The only difference from Example 1 is that 16 ml of lithium-based grease is heated to 70-90°C, 80 ml of anti-wear hydraulic oil is added, the mixture is stirred and reacted for 1-2 hours, and then cooled to obtain the lubricating oil.

[0062] Example 5

[0063] The only difference from Example 1 is that 80ml of lithium-based grease is heated to 70~90℃, 5ml of anti-wear hydraulic oil is added, the mixture is stirred and reacted for 1~2 hours, and then cooled to obtain the lubricating oil.

[0064] Example 6

[0065] The only difference from Example 1 is that sodium dodecyl sulfonate is replaced with methyl methacrylate.

[0066] Example 7

[0067] The only difference from Example 1 is that the amount of sodium dodecyl sulfonate used is 12g.

[0068] Example 8

[0069] The only difference from Example 1 is that sodium dodecyl sulfonate is not added.

[0070] Comparative Example 1

[0071] The only difference from Example 4 is that anti-wear hydraulic oil was not added.

[0072] Comparative Example 2

[0073] The only difference from Example 1 is that the lithium-based grease is Great Wall General Lithium-based Grease No. 3 purchased from Sinopec Lubricating Oil Co., Ltd., with a working cone penetration of 228 at 0.1 mm.

[0074] Comparative Example 3

[0075] Only Great Wall General Lithium-based Grease No. 1, purchased from Sinopec Lubricating Oil Co., Ltd., is used.

[0076] Test case

[0077] Table 1 shows the performance indicators of the lubricating oils of Examples 1-7 and Comparative Examples 1-3:

[0078] Table 1

[0079]

[0080] As can be seen from Table 1, compared with the comparative example, the lubricating oil obtained in the embodiment has a higher cone penetration value and higher fluidity, which can be adapted to use at different temperatures. It solves the problem of lubricating oil in the loading arm motor concentrating into a clump during use, and significantly reduces the failure rate of the loading arm, especially the failure rate under extremely cold winter conditions.

[0081] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A lubricating oil, characterized in that, It consists of the following components by volume percentage: Lithium-based grease 10~99.99% and anti-wear hydraulic oil 0.01~90%; The lithium-based grease has a working cone penetration of 310~340 mm at 0.1 mm. The anti-wear hydraulic oil has a flash point of 230~250℃ and a kinematic viscosity of 41.4 mm at 40℃. 2 / s~50.6mm 2 / s; The lithium-based grease is composed of the following components in parts by weight: 80-97 parts base oil, 2-15 parts lithium-based thickener, and 1-5 parts lithium-based grease additive. The anti-wear hydraulic oil is composed of the following components in parts by weight: 80-95 parts base oil, 1-8 parts hydraulic oil additives, 1-6 parts other anti-wear hydraulic oil additives, and 1-12 parts antifreeze. Both the lithium-based grease and the anti-wear hydraulic oil are based on paraffinic base oils; the viscosity of the paraffinic base oil is 9-11 mm. 2 / s; The lithium-based grease additive comprises a mixture of antioxidants, extreme pressure agents, corrosion inhibitors, and viscosity modifiers; The hydraulic oil additive comprises a mixture of C15-C50 deeply refined mineral oil, zinc alkyl dithiophosphate, hindered alkylphenol, calcium salicylate sulfide, aralkyl polyether, sulfurized branched alkylphenol calcium, branched alkylphenol calcium, and dialkylcycloalkyl sulfonate zinc. The other anti-wear hydraulic oil additives include a mixture of metal deactivators, pour point depressants, and extreme pressure anti-wear agents.

2. The lubricating oil according to claim 1, wherein, The lubricating oil, by volume percentage, consists of the following components: 20-95% lithium-based grease and 5-80% anti-wear hydraulic oil.

3. The lubricating oil according to claim 1, wherein, The lithium-based grease is composed of the following components in parts by weight: 85-95 parts base oil, 5-10 parts lithium-based thickener, and 3-5 parts lithium-based grease additive.

4. The lubricating oil according to claim 1, wherein, The anti-wear hydraulic oil is composed of the following components in parts by weight: 85-90 parts base oil, 2-5 parts hydraulic oil additives, 3-5 parts other anti-wear hydraulic oil additives, and 6-10 parts antifreeze.

5. The lubricating oil according to claim 1, wherein, The lithium-based thickener is a fatty acid lithium salt; The antioxidant is an amine antioxidant and / or a phenolic antioxidant; The extreme pressure resistant agent is selected from at least one of borates, borates, zinc dialkyl dithiophosphate, molybdenum dialkyl dithiocarbamate, and sulfurized olefins. The corrosion inhibitor is selected from at least one of benzotriazole, benzotriazole derivatives and thiadiazole derivatives; The viscosity improver is an ethylene-propylene copolymer.

6. The lubricating oil according to claim 5, wherein, The fatty acids are stearic acid and / or 12-hydroxystearic acid.

7. The lubricating oil according to claim 5, wherein, The amine antioxidant is dialkyldiphenylamine, and the phenolic antioxidant is 2,6-di-tert-butyl-p-cresol.

8. The lubricating oil according to claim 1, wherein, The pour point depressant is a polymethyl methacrylate solution; The metal deactivator is selected from at least one of benzotriazole derivatives, thiadiazole derivatives, and organic amines. The extreme pressure anti-wear agent is selected from at least one of phosphate esters, phosphites, organic sulfides, phosphorus-nitrogen compounds, sulfur-phosphorus-nitrogen compounds, and organic chlorides; The antifreeze is at least one of ethylene glycol, polyvinyl alcohol, polyisobutylene, methyl methacrylate, and sodium dodecyl sulfonate.

9. The lubricating oil according to claim 1, wherein, The mass ratio of the C15-C50 deep refined mineral oil, zinc alkyl dithiophosphate, hindered alkylphenol, calcium salicylate sulfide, aralkyl polyether, sulfurized branched alkylphenol calcium, branched alkylphenol calcium, and dialkylcycloalkyl sulfonate zinc is (19~21):(39~41):(2.5~3.5):(1.5~2.5):(1.5~2.5):(0.3~0.5):

1.

10. The lubricating oil according to claim 8, wherein, The antifreeze is sodium dodecyl sulfonate.

11. A method for preparing the lubricating oil according to any one of claims 1-10, characterized in that, Includes the following steps: The lithium-based grease is heated to 70-90°C, anti-wear hydraulic oil is added, and the mixture is stirred and reacted for 1-2 hours. The mixture is then cooled to obtain the lubricating oil.

12. The preparation method according to claim 11, wherein, It also includes the following steps: (1) Preparation of lithium-based grease: Take a portion of paraffinic base oil and heat it to 80~90℃, add lithium-based thickener to thicken it, after thickening, stir and heat to 190~220℃, add the remaining paraffinic base oil, cool down to 80~100℃, add lithium-based grease additive and stir evenly, cool to obtain the lithium-based grease; wherein, the ratio of a portion of paraffinic base oil to the remaining paraffinic base oil is (2~4):1; (2) Preparation of anti-wear hydraulic oil: Mix base oil, hydraulic oil additives, other anti-wear hydraulic oil additives and antifreeze, heat to 70~80℃, stir and react for 4~5 hours, and cool to obtain the anti-wear hydraulic oil.

13. The application of the lubricating oil according to any one of claims 1-10 or the lubricating oil prepared by the preparation method according to claim 11 or 12 in an armature motor.

14. The method of using the lubricating oil according to any one of claims 1-10 or the lubricating oil prepared by the method according to claim 11 or 12 in an armature motor, characterized in that, The process includes the following steps: injecting the lubricating oil into the loading arm motor.

15. The method of use according to claim 14, wherein, When the ambient temperature is below -10℃, the volume ratio of anti-wear hydraulic oil to lithium-based grease is (3~4):1; When the ambient temperature is -10℃ to 30℃, the volume ratio of anti-wear hydraulic oil to lithium-based grease is (1~3):1; When the ambient temperature is above 30℃, the volume ratio of anti-wear hydraulic oil to lithium-based grease is (0.01~1):

1.

16. The method of use according to claim 15, wherein, When the ambient temperature is above 30℃, the volume ratio of anti-wear hydraulic oil to lithium-based grease is (0.05~0.1):1.

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