Anti-wear hydraulic oil and production process thereof

Abstract

The invention belongs to the technical field of hydraulic oil preparation, and particularly relates to anti-wear hydraulic oil and a production process thereof. The anti-wear hydraulic oil is prepared from the following raw materials in percentage by mass: 2 to 2.2 percent of an anti-wear complexing agent, 0.002 to 0.003 percent of a demulsifying agent, 0.001 to 0.0015 percent of an anti-foaming agent, 0.03 to 0.04 percent of an anti-rust agent, 0.1 to 0.3 percent of a pour point depressant, 0.3 to 0.5 percent of a dispersing agent and the balance of base oil. According to the anti-wear hydraulic oil disclosed by the invention, a mixture of 500N II type base oil, 100N III type base oil, CTL 4 base oil and trimethylolpropane trioleate is used as base oil, and an anti-wear complexing agent, a demulsifier, an anti-foaming agent, an anti-rust agent, a pour point depressant and a dispersing agent are added into the base oil; the prepared anti-wear hydraulic oil is ensured to have excellent extreme pressure property, thermal oxidation stability and wear resistance.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic oil preparation technology, specifically relating to an anti-wear hydraulic oil and its production process. Background Technology

[0002] Hydraulic oil, as a crucial energy transfer medium in hydraulic systems, is widely used in machine tools, automobiles, construction machinery, metallurgical machinery, agricultural machinery, mining machinery, aerospace machinery, and petrochemical equipment. For a hydraulic system, the oil pump is its heart, while the hydraulic oil is its lifeblood, both vital to its operation. The effective, continuous, reliable, and economical operation of a hydraulic system depends to a certain extent on the performance of the hydraulic oil, as well as the correct selection and use of the hydraulic oil.

[0003] Anti-wear hydraulic oils are mainly classified into two types based on their additive composition: zinc-based anti-wear hydraulic oils (ash-containing type) and ashless anti-wear hydraulic oils. Zinc-based anti-wear hydraulic oils can cause severe corrosion to copper-plated components of high-pressure plungers during use, leading to hydraulic pump damage. Furthermore, the presence of even a small amount of water causes severe emulsification, clogging the filtration system. Ashless anti-wear hydraulic oils, because they do not contain zinc or other metal salts, do not react with silver-plated components and therefore do not corrode copper components, making them more suitable for plunger pumps with copper or copper alloy components. However, in terms of the most important performance characteristic—extreme pressure anti-wear performance—they are inferior to zinc-based anti-wear hydraulic oils. Extreme pressure anti-wear performance is one of the important indicators for evaluating hydraulic oil quality and is crucial for the normal operation of equipment such as high-pressure vane pumps, which undoubtedly limits the application of ashless anti-wear hydraulic oils. Therefore, how to provide an ashless hydraulic oil with excellent extreme pressure performance, thermal oxidation stability, and good anti-wear properties is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-wear hydraulic oil with excellent extreme pressure and anti-wear properties. In addition, this invention also provides its production process.

[0005] The anti-wear hydraulic oil of this invention, by mass percentage, is composed of the following raw materials: 2-2.2% anti-wear composite agent, 0.002-0.003% demulsifier, 0.001-0.0015% antifoaming agent, 0.03-0.04% rust inhibitor, 0.1-0.3% pour point depressant, 0.3-0.5% dispersant, with base oil as the balance; the preparation method of the anti-wear composite agent is as follows: under nitrogen protection, CTL is added to the reaction device. 4. Base oil is heated to 50-55℃, and then 2,5-bis(octyldithio)-1,3,4-thiadiazole, N,N'-disec-butyl-p-phenylenediamine, and 4,4'-methylenebis(dibutyldithioformamide) are added sequentially. The mixture is sheared and dissolved at 50-55℃ for 20 min. Then, butyl isooctyl phosphate dodecylamine salt and triphenylboronic acid ester are added sequentially at 50-55℃ and sheared for 10 min. The mixture is heated to 60-65℃ and stirred for 40 min. After heating is stopped and the mixture is cooled, it is filtered to prepare the anti-wear composite agent. The base oil, by mass percentage, is composed of the following raw materials: 40% 500N Group II base oil, 25% 100N Group III base oil, 20% CTL 4 base oil, and 15% trimethylolpropane trioleate.

[0006] In the preparation method of the anti-wear composite agent, the stirring speed is 1200-1500 r / min; the filtration after stopping heating and cooling is carried out by filtration with a 1 μm glass fiber bag after cooling to 40℃.

[0007] The anti-wear compound is composed of the following raw materials by mass percentage: 40% butyl isooctyl phosphate dodecylamine salt, 15% triphenylboronic acid ester, 15% 4,4'-methylenebis(dibutyldithioformamide), 8% 2,5-bis(octyldithio)-1,3,4-thiadiazole, 20% N,N'-disec-butyl-p-phenylenediamine, and 2% CTL 4 base oil. The manufacturer of CTL 4 base oil is Shanxi Lu'an Taihang Lubrication Technology Co., Ltd., and the model is CTL 100N.

[0008] The 500N Group II base oil is manufactured by Sinopec Maoming Petrochemical Company; the 100N Group III base oil is manufactured by Sinopec Maoming Petrochemical Company, and its grade is HVI Ⅲ 4; the CTL 4 base oil is manufactured by Shanxi Lu'an Taihang Lubrication Technology Co., Ltd., and its grade is CTL 100N; and the trimethylolpropane trioleate is manufactured by Zhejiang Huangma Technology Co., Ltd.

[0009] The demulsifier is polyoxyethylene polyoxypropylene ether.

[0010] The antifoaming agent is polydimethylsiloxane.

[0011] The rust inhibitor is N-oleoylsarcosine-octadecylamine salt.

[0012] The pour point depressant is an ethylene vinyl acetate copolymer.

[0013] The dispersant is imine succinate.

[0014] The production process of the anti-wear hydraulic oil described in this invention consists of the following steps: Under nitrogen protection, base oil accounting for 99% of the total mass of base oil is added to a blending tank, stirred at a speed of 1000 r / min and heated to 54-58℃, anti-wear composite agent, rust inhibitor, pour point depressant and dispersant are added in sequence and stirred and dispersed, the temperature is lowered to 35℃ and diluted demulsifier is added and stirred for 5 min, then diluted antifoaming agent is added and dissolved for 5 min, the temperature is raised to 60-62℃ and stirring reaction is continued, and finally after post-treatment, the anti-wear hydraulic oil is prepared.

[0015] The diluted demulsifier is prepared by mixing the demulsifier with 0.9% of the base oil by mass, stirring at 35°C for 5 minutes, and stirring at 500 r / min.

[0016] The diluted antifoaming agent is prepared by mixing the antifoaming agent with 0.1% of the base oil by mass, stirring at 35°C for 5 minutes, and stirring at 350 r / min.

[0017] The anti-wear composite agent, rust inhibitor, pour point depressant and dispersant are added sequentially and stirred and dispersed at a stirring speed of 1000 r / min for 30 min.

[0018] The mixture is cooled to 35°C, then diluted demulsifier is added and stirred for 5 minutes, followed by the addition of diluted antifoaming agent and dissolution for 5 minutes, with a stirring speed of 500 r / min.

[0019] The temperature is raised to 60-62℃ and the reaction is continued with stirring at a speed of 600 r / min for 25-28 min.

[0020] The post-treatment involves stopping heating, then cooling to 35°C, and filtering through a 1 μm glass fiber bag.

[0021] Compared with the prior art, the present invention has the following advantages: (1) The anti-wear hydraulic oil of the present invention uses a mixture of 500N Group II base oil, 100N Group III base oil, CTL 4 base oil and trimethylolpropane trioleate as base oil, and adds anti-wear compound agent, demulsifier, antifoaming agent, rust inhibitor, pour point depressant and dispersant to the base oil. The synergistic effect between the raw materials ensures that the prepared anti-wear hydraulic oil has excellent extreme pressure performance, thermal oxidation stability and anti-wear performance.

[0022] (2) The anti-wear hydraulic oil of the present invention uses 500N Group II base oil, 100N Group III base oil, CTL 4 base oil and trimethylolpropane trioleate as a compound. Among them, 500N Group II base oil serves as a "viscosity skeleton" to provide basic viscosity. 100N Group III base oil has a high viscosity index and excellent antioxidant properties. Together with 500N Group II base oil, it improves the thermal stability and low-temperature fluidity of hydraulic oil. CTL 4 base oil is a coal-derived Fischer-Tropsch synthetic oil with a highly heterogeneous molecular structure, high viscosity index and low pour point, which can further reduce low-temperature viscosity and significantly extend oxidation life. Trimethylolpropane trioleate is a polar synthetic ester that can be directionally adsorbed on metal surfaces to improve oil film strength and friction reduction performance, and improve the solubility and dispersion of other additives in hydraulic oil by the base oil.

[0023] (3) The anti-wear hydraulic oil of the present invention, wherein the anti-wear composite agent uses a mixture of butyl isooctyl phosphate dodecylamine salt, triphenyl borate ester and 4,4'-methylenebis(dibutyldithioformamide) as an anti-wear agent, and adds 2,5-bis(octyldithio)-1,3,4-thiadiazole as a metal deactivator. The sulfur-nitrogen heterocycle therein forms a dense complex film with the copper surface, blocking the dissolution of copper ions into the oil and preventing copper catalytic oxidation and copper sheet corrosion. N,N'-disec-butyl-p-phenylenediamine is used as a rust inhibitor. The amine group and aromatic ring in the molecular structure form a monomolecular adsorption layer on the iron surface, blocking oxygen and water, and achieving rust prevention. The two are complementary, and CTL 4 base oil is used as the base oil. At the beginning of friction, butyl isooctyl phosphate dodecylamine salt chemically adsorbs onto the iron surface through phosphorus-oxygen groups to form a FePO4 / FeP anti-wear film. This adsorption layer can immediately play a certain anti-wear and friction reduction role, and the amine group simultaneously passivates the metal and inhibits initial oxidation. As the load and temperature increase, triphenylboronic acid ester begins to play a crucial role. Through hydrolysis and polycondensation, triphenylboronic acid ester generates a B2O3 / iron borate glassy layer. This film is highly hard and chemically inert, and intercalates with the phosphate film to form a tough composite protective layer. Under the most demanding extreme pressure conditions (such as ultimate load or starting impact), 4,4'-methylenebis(dibutyldithioformamide) begins to play a core role. It decomposes at high temperatures, breaking the CS and NC bonds in 4,4'-methylenebis(dibutyldithioformamide), rapidly releasing active sulfur, which reacts with iron to form an extreme pressure film such as FeS. This film has a high melting point and low shear strength, providing extreme pressure load-bearing capacity. Furthermore, after film wear, 4,4'-methylenebis(dibutyldithioformamide) continuously replenishes sulfur, achieving "self-repair." Thus, the three films are sequentially activated and act as substrates for each other, thereby exerting a synergistic extreme pressure anti-wear effect.

[0024] (4) The anti-wear hydraulic oil of the present invention adds polyoxyethylene polyoxypropylene ether as a demulsifier. Polyoxyethylene polyoxypropylene ether has an amphiphilic block structure and preferentially adsorbs at the oil-water interface, reducing interfacial tension, destroying the water droplet protective film, causing the water droplets to coalesce and settle, thereby quickly achieving oil-water separation and preventing emulsification; polydimethylsiloxane is added as an antifoaming agent to ensure the compressibility and lubrication continuity of the oil; N-oleoylsarcosine-octadecylamine salt is added as a rust inhibitor. The polar end sarcosine ammonium salt of N-oleoylsarcosine-octadecylamine salt is adsorbed on the iron surface, and the long-chain alkyl forms a hydrophobic film, blocking the gas phase and liquid phase, and preventing the iron surface of the inner wall of the oil tank from rusting; ethylene vinyl acetate copolymer is added as a pour point depressant. The side chain vinyl acetate in the molecular structure destroys the wax crystal network, inhibits wax crystal growth, and reduces the solidification temperature; succinic imine is added as a dispersant to disperse sludge, paint film and polar oxides, and prevent deposition and filter blockage.

[0025] (5) The production process of the anti-wear hydraulic oil described in this invention has easy-to-control process parameters, is easy to realize industrial production, and produces anti-wear hydraulic oil with stable performance. Detailed Implementation

[0026] Example 1 The anti-wear hydraulic oil described in Example 1 is composed of the following raw materials by mass percentage: 2.1% anti-wear compound agent, 0.0025% demulsifier, 0.0013% antifoaming agent, 0.035% rust inhibitor, 0.2% pour point depressant, 0.4% dispersant, and base oil as the balance; the anti-wear compound agent is prepared by adding CTL to the reaction device under nitrogen protection. 4. Base oil was heated to 53°C, and then 2,5-bis(octyldithio)-1,3,4-thiadiazole, N,N'-disec-butyl-p-phenylenediamine, and 4,4'-methylenebis(dibutyldithioformamide) were added sequentially. The mixture was sheared and dissolved at 53°C for 20 min. Then, butyl isooctyl phosphate dodecylamine salt and triphenylboronic acid ester were added sequentially at 53°C and sheared for 10 min. The mixture was heated to 63°C and stirred for 40 min. After heating was stopped and the mixture was cooled, it was filtered to prepare the anti-wear composite agent. The base oil, by mass percentage, consisted of the following raw materials: 40% 500N Group II base oil, 25% 100N Group III base oil, 20% CTL 4 base oil, and 15% trimethylolpropane trioleate.

[0027] In the preparation method of the anti-wear composite agent, the stirring speed is 1300 r / min; the filtration after stopping heating and cooling is carried out by filtration with a 1 μm glass fiber bag after cooling to 40℃.

[0028] The anti-wear compound is composed of the following raw materials by mass percentage: 40% butyl isooctyl phosphate dodecylamine salt, 15% triphenylboronic acid ester, 15% 4,4'-methylenebis(dibutyldithioformamide), 8% 2,5-bis(octyldithio)-1,3,4-thiadiazole, 20% N,N'-disec-butyl-p-phenylenediamine, and 2% CTL 4 base oil. The manufacturer of CTL 4 base oil is Shanxi Lu'an Taihang Lubrication Technology Co., Ltd., and the model is CTL 100N.

[0029] The 500N Group II base oil is manufactured by Sinopec Maoming Petrochemical Company; the 100N Group III base oil is manufactured by Sinopec Maoming Petrochemical Company, and its grade is HVI Ⅲ 4; the CTL 4 base oil is manufactured by Shanxi Lu'an Taihang Lubrication Technology Co., Ltd., and its grade is CTL 100N; and the trimethylolpropane trioleate is manufactured by Zhejiang Huangma Technology Co., Ltd.

[0030] The demulsifier is polyoxyethylene polyoxypropylene ether.

[0031] The antifoaming agent is polydimethylsiloxane.

[0032] The rust inhibitor is N-oleoylsarcosine-octadecylamine salt.

[0033] The pour point depressant is an ethylene vinyl acetate copolymer.

[0034] The dispersant is imine succinate.

[0035] The production process of the anti-wear hydraulic oil described in Example 1 consists of the following steps: Under nitrogen protection, base oil accounting for 99% of the total mass of base oil is added to a blending tank, stirred at a speed of 1000 r / min and heated to 56°C, anti-wear composite agent, rust inhibitor, pour point depressant and dispersant are added in sequence and stirred and dispersed, the temperature is lowered to 35°C and diluted demulsifier is added and stirred for 5 min, then diluted antifoaming agent is added and dissolved for 5 min, the temperature is raised to 61°C and stirring reaction is continued, and finally after post-treatment, anti-wear hydraulic oil is prepared.

[0036] The diluted demulsifier is prepared by mixing the demulsifier with 0.9% of the base oil by mass, stirring at 35°C for 5 minutes, and stirring at 500 r / min.

[0037] The diluted antifoaming agent is prepared by mixing the antifoaming agent with 0.1% of the base oil by mass, stirring at 35°C for 5 minutes, and stirring at 350 r / min.

[0038] The anti-wear composite agent, rust inhibitor, pour point depressant and dispersant are added sequentially and stirred and dispersed at a stirring speed of 1000 r / min for 30 min.

[0039] The mixture is cooled to 35°C, then diluted demulsifier is added and stirred for 5 minutes, followed by the addition of diluted antifoaming agent and dissolution for 5 minutes, with a stirring speed of 500 r / min.

[0040] The temperature was raised to 61°C and the reaction was continued with stirring at a speed of 600 r / min for 26 min.

[0041] The post-treatment involves stopping heating, then cooling to 35°C, and filtering through a 1 μm glass fiber bag.

[0042] Example 2 The anti-wear hydraulic oil described in Example 2 is composed of the following raw materials by mass percentage: 2% anti-wear composite agent, 0.003% demulsifier, 0.0015% antifoaming agent, 0.04% rust inhibitor, 0.3% pour point depressant, 0.3% dispersant, and base oil as the balance. The preparation method of the anti-wear composite agent is as follows: Under nitrogen protection, CTL 4 base oil is added to the reaction apparatus, and the temperature is raised to 50°C. Then, 2,5-bis(octyldithio)-1,3,4-thiadiazole, N,N'-disec-butyl-p-phenylenediamine, and 4,4'-methylenebis(dibutyldithioformamide) are added sequentially. The mixture is sheared and dissolved at 50°C for 20 minutes. Then, butyl isooctyl phosphate dodecylamine salt and triphenylboronic acid ester are added sequentially at 50°C and sheared for 10 minutes. The temperature is raised to 60°C and stirred for 40 minutes. After stopping heating and cooling, the mixture is filtered to obtain the anti-wear composite agent. The base oil, by mass percentage, is composed of the following raw materials: 500N... It consists of 40% Group II base oil, 25% 100N Group III base oil, 20% CTL 4 base oil, and 15% trimethylolpropane trioleate.

[0043] In the preparation method of the anti-wear composite agent, the stirring speed is 1500 r / min; the filtration after stopping heating and cooling is carried out by filtration with a 1 μm glass fiber bag after cooling to 40℃.

[0044] The anti-wear compound is composed of the following raw materials by mass percentage: 40% butyl isooctyl phosphate dodecylamine salt, 15% triphenylboronic acid ester, 15% 4,4'-methylenebis(dibutyldithioformamide), 8% 2,5-bis(octyldithio)-1,3,4-thiadiazole, 20% N,N'-disec-butyl-p-phenylenediamine, and 2% CTL 4 base oil. The manufacturer of CTL 4 base oil is Shanxi Lu'an Taihang Lubrication Technology Co., Ltd., and the model is CTL 100N.

[0045] The 500N Group II base oil is manufactured by Sinopec Maoming Petrochemical Company; the 100N Group III base oil is manufactured by Sinopec Maoming Petrochemical Company, and its grade is HVI Ⅲ 4; the CTL 4 base oil is manufactured by Shanxi Lu'an Taihang Lubrication Technology Co., Ltd., and its grade is CTL 100N; and the trimethylolpropane trioleate is manufactured by Zhejiang Huangma Technology Co., Ltd.

[0046] The demulsifier is polyoxyethylene polyoxypropylene ether.

[0047] The antifoaming agent is polydimethylsiloxane.

[0048] The rust inhibitor is N-oleoylsarcosine-octadecylamine salt.

[0049] The pour point depressant is an ethylene vinyl acetate copolymer.

[0050] The dispersant is imine succinate.

[0051] The production process of the anti-wear hydraulic oil described in Example 2 consists of the following steps: Under nitrogen protection, base oil accounting for 99% of the total mass of base oil is added to a blending tank, stirred at a speed of 1000 r / min and heated to 58°C, anti-wear composite agent, rust inhibitor, pour point depressant and dispersant are added in sequence and stirred and dispersed, the temperature is lowered to 35°C and diluted demulsifier is added and stirred for 5 min, then diluted antifoaming agent is added and dissolved for 5 min, the temperature is raised to 62°C and stirring reaction is continued, and finally after post-treatment, the anti-wear hydraulic oil is prepared.

[0052] The diluted demulsifier is prepared by mixing the demulsifier with 0.9% of the base oil by mass, stirring at 35°C for 5 minutes, and stirring at 500 r / min.

[0053] The diluted antifoaming agent is prepared by mixing the antifoaming agent with 0.1% of the base oil by mass, stirring at 35°C for 5 minutes, and stirring at 350 r / min.

[0054] The anti-wear composite agent, rust inhibitor, pour point depressant and dispersant are added sequentially and stirred and dispersed at a stirring speed of 1000 r / min for 30 min.

[0055] The mixture is cooled to 35°C, then diluted demulsifier is added and stirred for 5 minutes, followed by the addition of diluted antifoaming agent and dissolution for 5 minutes, with a stirring speed of 500 r / min.

[0056] The temperature was raised to 62°C and the reaction was continued with stirring at a speed of 600 r / min for 25 min.

[0057] The post-treatment involves stopping heating, then cooling to 35°C, and filtering through a 1 μm glass fiber bag.

[0058] Example 3 The anti-wear hydraulic oil described in Example 3 is composed of the following raw materials by mass percentage: 2.2% anti-wear composite agent, 0.002% demulsifier, 0.001% antifoaming agent, 0.03% rust inhibitor, 0.1% pour point depressant, 0.5% dispersant, and the balance being base oil. The preparation method of the anti-wear composite agent is as follows: Under nitrogen protection, CTL 4 base oil is added to the reaction apparatus, and the temperature is raised to 55°C. Then, 2,5-bis(octyldithio)-1,3,4-thiadiazole, N,N'-disec-butyl-p-phenylenediamine, and 4,4'-methylenebis(dibutyldithioformamide) are added sequentially. The mixture is sheared and dissolved at 55°C for 20 minutes. Then, butyl isooctyl phosphate dodecylamine salt and triphenylboronic acid ester are added sequentially at 55°C and sheared for 10 minutes. The temperature is raised to 65°C and stirred for 40 minutes. After stopping heating and cooling, the mixture is filtered to obtain the anti-wear composite agent. The base oil, by mass percentage, is composed of the following raw materials: 500N... It consists of 40% Group II base oil, 25% 100N Group III base oil, 20% CTL 4 base oil, and 15% trimethylolpropane trioleate.

[0059] In the preparation method of the anti-wear composite agent, the stirring speed is 1200 r / min; the filtration after stopping heating and cooling is carried out by filtration with a 1 μm glass fiber bag after cooling to 40℃.

[0060] The anti-wear compound is composed of the following raw materials by mass percentage: 40% butyl isooctyl phosphate dodecylamine salt, 15% triphenylboronic acid ester, 15% 4,4'-methylenebis(dibutyldithioformamide), 8% 2,5-bis(octyldithio)-1,3,4-thiadiazole, 20% N,N'-disec-butyl-p-phenylenediamine, and 2% CTL 4 base oil. The manufacturer of CTL 4 base oil is Shanxi Lu'an Taihang Lubrication Technology Co., Ltd., and the model is CTL 100N.

[0061] The 500N Group II base oil is manufactured by Sinopec Maoming Petrochemical Company; the 100N Group III base oil is manufactured by Sinopec Maoming Petrochemical Company, and its grade is HVI Ⅲ 4; the CTL 4 base oil is manufactured by Shanxi Lu'an Taihang Lubrication Technology Co., Ltd., and its grade is CTL 100N; and the trimethylolpropane trioleate is manufactured by Zhejiang Huangma Technology Co., Ltd.

[0062] The demulsifier is polyoxyethylene polyoxypropylene ether.

[0063] The antifoaming agent is polydimethylsiloxane.

[0064] The rust inhibitor is N-oleoylsarcosine-octadecylamine salt.

[0065] The pour point depressant is an ethylene vinyl acetate copolymer.

[0066] The dispersant is imine succinate.

[0067] The production process of the anti-wear hydraulic oil described in Example 3 consists of the following steps: Under nitrogen protection, base oil accounting for 99% of the total mass of base oil is added to a blending tank, stirred at a speed of 1000 r / min and heated to 54°C, anti-wear composite agent, rust inhibitor, pour point depressant and dispersant are added in sequence and stirred and dispersed, the temperature is lowered to 35°C and diluted demulsifier is added and stirred for 5 min, then diluted antifoaming agent is added and dissolved for 5 min, the temperature is raised to 60°C and stirring reaction is continued, and finally after post-treatment, the anti-wear hydraulic oil is prepared.

[0068] The diluted demulsifier is prepared by mixing the demulsifier with 0.9% of the base oil by mass, stirring at 35°C for 5 minutes, and stirring at 500 r / min.

[0069] The diluted antifoaming agent is prepared by mixing the antifoaming agent with 0.1% of the base oil by mass, stirring at 35°C for 5 minutes, and stirring at 350 r / min.

[0070] The anti-wear composite agent, rust inhibitor, pour point depressant and dispersant are added sequentially and stirred and dispersed at a stirring speed of 1000 r / min for 30 min.

[0071] The mixture is cooled to 35°C, then diluted demulsifier is added and stirred for 5 minutes, followed by the addition of diluted antifoaming agent and dissolution for 5 minutes, with a stirring speed of 500 r / min.

[0072] The temperature was raised to 60°C and the reaction was continued with stirring at a speed of 600 r / min for 28 min.

[0073] The post-treatment involves stopping heating, then cooling to 35°C, and filtering through a 1 μm glass fiber bag.

[0074] Comparative Example 1 The production process and raw material composition of the anti-wear hydraulic oil described in Comparative Example 1 are the same as those in Example 1. The only difference is that the raw material composition of the anti-wear compound in the anti-wear hydraulic oil is different. The anti-wear compound in Comparative Example 1 is composed of the following raw materials by mass percentage: 45% triphenylboronic acid ester, 25% 4,4'-methylenebis(dibutyldithioformamide), 8% 2,5-bis(octyldithio)-1,3,4-thiadiazole, 20% N,N'-disec-butyl-p-phenylenediamine, and 2% CTL 4 base oil. The manufacturer of CTL 4 base oil is Shanxi Lu'an Taihang Lubrication Technology Co., Ltd., and the model is CTL 100N.

[0075] Comparative Example 2 The production process and raw material composition of the anti-wear hydraulic oil described in Comparative Example 2 are the same as those in Example 1. The only difference is that the raw material composition of the anti-wear compound in the anti-wear hydraulic oil is different. The anti-wear compound in Comparative Example 2, by mass percentage, consists of the following raw materials: 50% butyl isooctyl phosphate dodecylamine salt, 20% 4,4'-methylene bis(dibutyldithioformamide), 8% 2,5-bis(octyldithio)-1,3,4-thiadiazole, 20% N,N'-disec-butyl-p-phenylenediamine, and 2% CTL 4 base oil. The manufacturer of CTL 4 base oil is Shanxi Lu'an Taihang Lubrication Technology Co., Ltd., and the model is CTL 100N.

[0076] Comparative Example 3 The production process and raw material composition of the anti-wear hydraulic oil described in Comparative Example 3 are the same as those in Example 1. The only difference is that, by mass percentage, the anti-wear compound oil is composed of the following raw materials: the composition of the anti-wear compound oil is different. In the anti-wear compound oil described in Comparative Example 3, the composition includes 50% butyl isooctyl phosphate dodecylamine salt, 20% triphenylboronic acid ester, 8% 2,5-bis(octyldithio)-1,3,4-thiadiazole, 20% N,N'-disec-butyl-p-phenylenediamine, and 2% CTL 4 base oil. The manufacturer of CTL 4 base oil is Shanxi Lu'an Taihang Lubrication Technology Co., Ltd., and the model is CTL 100N.

[0077] The performance of the anti-wear hydraulic oils prepared in Examples 1-3 and Comparative Examples 1-3 was tested, and the results are shown in Table 1 below: Table 1 Test results of anti-wear hydraulic oil performance As shown in Table 1, the anti-wear hydraulic oils prepared in Examples 1-3 have significantly better performance than those in Comparative Examples 1-3. The anti-wear hydraulic oils prepared in Comparative Examples 1-3 have reduced extreme pressure performance, anti-wear performance, or oxidation stability due to the absence of any one of the three components in the anti-wear composite agent: butyl isooctyl phosphate dodecylamine salt, 4,4'-methylenebis(dibutyldithioformamide), or triphenyl borate.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An anti-wear hydraulic oil, characterized in that: The product, by mass percentage, is composed of the following raw materials: 2-2.2% anti-wear compound, 0.002-0.003% demulsifier, 0.001-0.0015% antifoaming agent, 0.03-0.04% rust inhibitor, 0.1-0.3% pour point depressant, 0.3-0.5% dispersant, with base oil as the balance; the preparation method of the anti-wear compound is as follows: under nitrogen protection, CTL is added to the reaction apparatus.

4. Base oil is heated to 50-55℃, and then 2,5-bis(octyldithio)-1,3,4-thiadiazole, N,N'-disec-butyl-p-phenylenediamine, and 4,4'-methylenebis(dibutyldithioformamide) are added sequentially. The mixture is sheared and dissolved at 50-55℃ for 20 min. Then, butyl isooctyl phosphate dodecylamine salt and triphenylboronic acid ester are added sequentially at 50-55℃ and sheared for 10 min. The mixture is heated to 60-65℃ and stirred for 40 min. After heating is stopped and the mixture is cooled, it is filtered to prepare the anti-wear composite agent. The base oil, by mass percentage, is composed of the following raw materials: 40% 500N Group II base oil, 25% 100N Group III base oil, 20% CTL 4 base oil, and 15% trimethylolpropane trioleate.

2. The anti-wear hydraulic oil according to claim 1, characterized in that: In the preparation method of the anti-wear composite agent, the stirring speed is 1200-1500 r / min; the filtration after stopping heating and cooling is carried out by filtration with a 1 μm glass fiber bag after cooling to 40℃. The anti-wear compound is composed of the following raw materials by mass percentage: 40% butyl isooctyl phosphate dodecylamine salt, 15% triphenylboronic acid ester, 15% 4,4'-methylenebis(dibutyldithioformamide), 8% 2,5-bis(octyldithio)-1,3,4-thiadiazole, 20% N,N'-disec-butyl-p-phenylenediamine, and 2% CTL 4 base oil. The manufacturer of CTL 4 base oil is Shanxi Lu'an Taihang Lubrication Technology Co., Ltd., and the model is CTL 100N.

3. The anti-wear hydraulic oil according to claim 1, characterized in that: The demulsifier is polyoxyethylene polyoxypropylene ether; the antifoaming agent is polydimethylsiloxane; and the rust inhibitor is N-oleoylsarcosine-octadecylamine salt.

4. The anti-wear hydraulic oil according to claim 1, characterized in that: The pour point depressant is an ethylene vinyl acetate copolymer; the dispersant is succinic imine.

5. A production process for the anti-wear hydraulic oil according to claim 1, characterized in that: The process consists of the following steps: Under nitrogen protection, 99% of the base oil by weight is added to a blending vessel and stirred at 1000 r / min while heating to 54-58°C. Anti-wear compound, rust inhibitor, pour point depressant and dispersant are added sequentially and stirred to disperse. The temperature is lowered to 35°C and diluted demulsifier is added and stirred for 5 min. Then diluted antifoaming agent is added and dissolved for 5 min. The temperature is raised to 60-62°C and stirring is continued to react. Finally, after post-treatment, anti-wear hydraulic oil is prepared.

6. The production process of the anti-wear hydraulic oil according to claim 5, characterized in that: The diluted demulsifier is prepared by mixing the demulsifier with 0.9% of the base oil by mass, stirring at 35°C for 5 minutes, and stirring at 500 r / min. The diluted antifoaming agent is prepared by mixing the antifoaming agent with 0.1% of the base oil by mass, stirring at 35°C for 5 minutes, and stirring at 350 r / min.

7. The production process of the anti-wear hydraulic oil according to claim 5, characterized in that: The anti-wear composite agent, rust inhibitor, pour point depressant and dispersant are added sequentially and stirred and dispersed at a stirring speed of 1000 r / min for 30 min.

8. The production process of the anti-wear hydraulic oil according to claim 5, characterized in that: The mixture is cooled to 35°C, then diluted demulsifier is added and stirred for 5 minutes, followed by the addition of diluted antifoaming agent and dissolution for 5 minutes, with a stirring speed of 500 r / min.

9. The production process of the anti-wear hydraulic oil according to claim 5, characterized in that: The temperature is raised to 60-62℃ and the reaction is continued with stirring at a speed of 600 r / min for 25-28 min.

10. The production process of the anti-wear hydraulic oil according to claim 5, characterized in that: The post-treatment involves stopping heating, then cooling to 35°C, and filtering through a 1 μm glass fiber bag.

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