An anti-wear hydraulic oil and its preparation method and application

Abstract

The application discloses an anti-wear hydraulic oil, characterized in that the anti-wear hydraulic oil comprises a composite base oil and an additive, wherein the composite base oil is composed of 80-85 parts by weight of a third type of hydrogenated base oil and 5-10 parts by weight of poly-alpha olefin or polyether, and the additive comprises 5-15 parts by weight of a viscosity index improver and 5-10 parts by weight of a solubilizer. The anti-wear hydraulic oil has a viscosity index greater than 150 and a kinematic viscosity less than 3000 mm 2 / s at -20 DEG C.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lubricating oil processing, and particularly relates to an anti-wear hydraulic oil and a preparation method and application thereof. BACKGROUND

[0002] The hydraulic oil is a hydraulic medium used in a hydraulic system, and plays a role of energy transmission, lubrication, cooling and the like in the system. At present, most of the hydraulic oil products on the market can meet the basic requirements of the national standards. However, China is vast in territory, and the temperature difference is large in different regions and different seasons, so the conventional products are difficult to meet the needs of the high-temperature performance and the low-temperature starting performance of the oil product in the north and the south and in the winter and the summer. At the same time, most of the products on the market have a short service life, poor protection for equipment, and no effect of reducing energy consumption of equipment operation.

[0003] Therefore, it is necessary to develop an energy-saving hydraulic oil product, which can be used in the north and the south and in all seasons in China on the basis of meeting the performance requirements of the conventional hydraulic oil, reduce the overall energy consumption of enterprises, and prolong the service life of equipment. SUMMARY

[0004] In order to overcome the shortcomings and deficiencies of the prior art, the primary object of the present application is to provide an anti-wear hydraulic oil.

[0005] Another object of the present application is to provide a preparation method of the anti-wear hydraulic oil.

[0006] Still another object of the present application is to provide the application of the anti-wear hydraulic oil in a hydraulic equipment.

[0007] The present application discloses an anti-wear hydraulic oil, which comprises a composite base oil and an additive, wherein the composite base oil is composed of 80-85 parts by weight of a third type of hydrogenated base oil and 5-10 parts by weight of poly-alpha olefin or polyether, and the additive comprises 5-15 parts by weight of a viscosity index improver and 5-10 parts by weight of a solubilizer.

[0008] Further, the viscosity index of the anti-wear hydraulic oil is greater than 150, and the kinematic viscosity at-20 DEG C is less than 3000 mm 2 / s.

[0009] Further, the third type of hydrogenated base oil is one or a mixture of two of the following: 100N third type of hydrogenated base oil, 150N third type of hydrogenated base oil, 250N third type of hydrogenated base oil, CTL4 third type of hydrogenated base oil, GTL420 third type of hydrogenated base oil and GTL430 third type of hydrogenated base oil. The poly-alpha olefin is one of the following: poly-alpha olefin PAO3, poly-alpha olefin PAO4, poly-alpha olefin PAO5 or poly-alpha olefin PAO6. The polyether is prepared by ring-opening homopolymerization or copolymerization of one or more of the following: ethylene oxide, propylene oxide and butylene oxide.

[0010] Further, the viscosity index improver is one of polyisobutylene, polymethacrylate, ethylene propylene copolymer (OCP ethylene propylene rubber) and hydrogenated styrene diene copolymer (HSD). Among them, the HSD viscosity index improver has a special star structure or block structure, and the molecular mass distribution is narrow, so the thickening ability and shear stability are balanced, and it has high thickening ability and excellent shear stability. The solubilizing agent is a saturated polyhydric alcohol ester.

[0011] Further, the auxiliary agent further comprises at least one of the following: an antioxidant, a pour point depressant, an anti-wear agent, a rust inhibitor, a corrosion inhibitor, a regulator, the regulator consisting of a defoaming agent and an anti-emulsifier.

[0012] Further, the antioxidant is one or a mixture of two of 9,9-dimethylacridine, diphenylamine, octylated diphenylamine, p-cresol and antioxidant CPL (antioxidant 616, i.e. the product of butylation of p-cresol and dicyclopentadiene). The pour point depressant is one or a mixture of two of modified polycarboxylate, polymethacrylate, alkyl naphthalene, ethylene-alpha-olefin. The anti-wear agent is one or a mixture of two of nano-ferric oxide, zinc dialkyldithiophosphate, amine neutralized phosphate ester (for example, RC3760). The rust inhibitor is a high-temperature reaction product of triethanolamine and boric acid in a weight ratio of 3:2. The corrosion inhibitor is one or a mixture of two of high-alkali calcium sulfonate with a total base number of 300-330 mgKOH / g, benzotriazole derivative, hydroxyethyl oleoyl imidazoline. The defoaming agent is one of polyether ammonium, low-carbon alcohol, isomeric alcohol. The anti-emulsifier is one of polyethylene oxide-propylene oxide ether, polyethylene oxide-propylene oxide block polyether, tetradecyltrimethylammonium chloride.

[0013] Further, the auxiliary agent further comprises 0.2-0.8 parts by weight of antioxidant, 0.3-1 parts by weight of pour point depressant, 0.3-1 parts by weight of anti-wear agent, 0.1-0.3 parts by weight of rust inhibitor and 0.3-0.8 parts by weight of corrosion inhibitor, 30-100 ppm of defoaming agent and 20-50 ppm of anti-emulsifier.

[0014] The application further discloses a preparation method of the anti-wear hydraulic oil.

[0015] (1) 0.1-0.3 parts by weight of rust inhibitor is placed in a reaction kettle, heated to 125-135 DEG C, and stirred for 2.5-2.5 hours;

[0016] (2) adding a complex base oil and an additive, and stirring uniformly, wherein the complex base oil is composed of 80-85 parts by weight of a third type of hydrogenated base oil and 5-10 parts by weight of poly-alpha olefin or polyether, and the additive comprises 5-15 parts by weight of a viscosity index improver and 5-10 parts by weight of a solubilizer;

[0017] (3) adding 30-100 ppm of an antifoaming agent and 20-50 ppm of an anti-emulsifying agent, and finally obtaining a transparent and uniform finished product.

[0018] Further, the additive further comprises at least one of 0.3-1 parts by weight of an anti-wear agent, 0.1-0.3 parts by weight of an anti-rust agent, 0.3-0.8 parts by weight of an anti-corrosion agent, 0.2-0.8 parts by weight of an anti-oxidant, and 0.3-1 parts by weight of a pour point depressant.

[0019] The application further discloses the use of the anti-wear hydraulic oil in preparing a hydraulic medium for a hydraulic device.

[0020] The application overcomes the defects of the prior art, and provides a novel anti-wear hydraulic oil, a preparation method and application thereof. The application mainly realizes the improvement of high and low temperature performance through the collocation of a complex base oil and a viscosity index improver and a solubilizer. The third type of hydrogenated oil used in the application is obtained by deep hydrogenation of mineral oil, has low contents of sulfur, nitrogen and aromatic hydrocarbon, and has significantly high susceptibility to anti-oxidants, and has good viscosity-temperature property, thermal oxidation stability and chemical stability compared with the first type and the second type of base oil. The poly-alpha olefin has high stability, good viscosity-temperature property, hydrolysis stability and corrosion resistance when combined with an oxidation inhibitor. The polyether has good performance and is particularly suitable for high temperature working environments. The application fully understands the performance advantages and disadvantages of various types of base oils and functional additives, and also focuses on the lubrication requirements of different devices in different application places, reversely designs the raw material proportion according to the performance requirements, and achieves a product with high performance-price ratio.

[0021] Compared with the defects and deficiencies of the prior art, the application has the following beneficial effects: the application selects raw materials, uses the third type of hydrogenated oil as one of base oil components, and simultaneously collocates poly-alpha olefin or polyether as a complex base oil, so that the viscosity index of the obtained complex base oil is greater than 110, and the pour point is lower than -20 DEG C. In cooperation with other additives, the viscosity index of the anti-wear hydraulic finished product is greater than 150, the pour point is lower than -35 DEG C, and the -20 DEG C kinetic viscosity is less than 3000 mm 2 / s, the obtained anti-wear hydraulic oil has good viscosity-temperature property and wide temperature applicability, has high viscosity index, good low temperature starting performance and applicability. The HM46 hydraulic oil of the application has good anti-wear and anti-rust performance, can guarantee normal operation of equipment in severe cold and hot regions, reduces friction and wear, improves the service life of equipment, and is helpful to realize energy saving and emission reduction. Detailed Implementation

[0022] The present invention will now be described in further detail. It should be understood that the described embodiments are merely illustrative and are not intended to limit the scope of the claims of the present invention.

[0023] Example 1

[0024] (1) Place 0.2 kg of rust inhibitor in a reaction vessel, heat to 130°C, and stir for 2 hours;

[0025] (2) Add 85kg of base oil, 7kg of viscosity index improver, 6kg of solubilizer, 0.3kg of antioxidant, 0.5kg of pour point depressant, 0.5kg of anti-wear agent and 0.5kg of corrosion inhibitor in sequence, and stir evenly;

[0026] (3) Add 80 ppm of defoamer and 20 ppm of deemulsifier to obtain transparent and uniform anti-wear hydraulic oil 1.

[0027] Examples 2-8

[0028] Anti-wear hydraulic oils 2-8 of Examples 2-8 were prepared using the same steps as those in Example 1, except for the different components and proportions of the added raw materials. The compositions of each example are shown in Tables 1 and 2 below for Examples 1-8.

[0029] Table 1. Raw material composition of anti-wear hydraulic oils in Examples 1 to 8

[0030]

[0031]

[0032] Table 2. Chemical composition of anti-wear hydraulic oils in Examples 1 to 8

[0033]

[0034]

[0035]

[0036] Comparative Example 1

[0037] Add 65 kg of base oil 150SN, 34.25 kg of base oil 400SN, and 0.75 kg of 703 compound agent sequentially at room temperature, and stir evenly to obtain anti-wear hydraulic oil 9.

[0038] Comparative Example 2

[0039] 65kg base oil 150SN, 34.25kg base oil BeiLi 10#, 0.75kg 703 complex agent were added in turn at normal temperature, and stirred uniformly to obtain the anti-wear hydraulic oil 10.

[0040] Effect example

[0041] The anti-wear hydraulic oils of the examples 1-8 and the comparative examples 1-2 were evaluated according to the national standard test method, including 40℃ kinematic viscosity, viscosity index, -20℃ kinematic viscosity, flash point, pour point and oil temperature reduction.

[0042] The obtained test results are shown in Table 3.

[0043]

[0044] The results of the above examples and comparative examples show that the anti-wear hydraulic oil of the present application is superior to the existing anti-wear hydraulic oil product. The viscosity index of the anti-wear hydraulic oil obtained in the examples of the present application is greater than 150, the kinematic viscosity at -20℃ is less than 3000mm 2 / s, and the oil temperature is reduced. The reduction of oil temperature can reduce the heat generated by friction during work, so as not to cause the reduction of hydraulic oil viscosity, thereby improving the service life of the workpiece. By reasonably adjusting the complex base oil and adding specific additives and regulators, the anti-wear hydraulic oil of the present application has higher viscosity index, better low temperature starting performance, and has wide applicability at high and low temperatures, and has good anti-wear and anti-rust performance, which is helpful to realize energy saving and emission reduction.

[0045] The above only describes the preferred embodiments of the present application and should not be used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An anti-wear hydraulic fluid characterized in that, The anti-wear hydraulic oil comprises a composite base oil and an additive, wherein the composite base oil is composed of 80-85 parts by weight of Group III hydrogenated base oil, 5-10 parts by weight of poly-alpha olefin or polyether, The additive comprises 5-15 parts by weight of viscosity index improver, 5-10 parts by weight of solubilizer, 0.1-0.3 parts by weight of anti-rust agent, 0.2-0.8 parts by weight of antioxidant, 0.3-1 parts by weight of pour point depressant, 0.3-1 parts by weight of anti-wear agent, 0.3-0.8 parts by weight of anti-corrosion agent, 30-100 ppm of defoaming agent and 20-50 ppm of anti-emulsifier, The viscosity index improver is one of polyisobutylene, polymethyl acrylate, ethylene-propylene copolymer and hydrogenated styrene diene copolymer; The solubilizer is saturated polyhydric alcohol ester; The anti-rust agent is a high-temperature reaction product of triethanolamine and boric acid at a weight ratio of 3:2; The antioxidant is one or a mixture of two of 9,9-dimethylacridine, diphenylamine, octylated diphenylamine, p-cresol and antioxidant CPL; The pour point depressant is one or a mixture of two of modified polycarboxylic ester, polymethyl acrylate, alkyl naphthalene, ethylene-alpha-olefin; The anti-wear agent is one or a mixture of two of nano-ferroferric oxide, zinc dialkyldithiophosphate, amine neutralized phosphate ester; The anti-corrosion agent is one or a mixture of two of high-alkali calcium sulfonate with a total alkali value of 300-330 mgKOH / g, benzotriazole derivative and hydroxyethyl oleoyl imidazoline; The defoaming agent is one of polyether ammonium, low-carbon alcohol and isomeric alcohol; and / or The anti-emulsifier is one of polyethylene oxide-propylene oxide ether and tetradecyl trimethyl ammonium chloride.

2. The anti-wear hydraulic fluid of claim 1, wherein, The anti-wear hydraulic oil has a viscosity index greater than 150 and a kinematic viscosity at -20°C of less than 3000 mm 2 / s.

3. The anti-wear hydraulic fluid of claim 1 wherein, The Group III hydrogenated base oil is one or a mixture of two of 100N Group III hydrogenated base oil, 150N Group III hydrogenated base oil, 250N Group III hydrogenated base oil, CTL4 Group III hydrogenated base oil, GTL420 Group III hydrogenated base oil and GTL430 Group III hydrogenated base oil; The poly-alpha olefin is one of poly-alpha olefin PAO3, poly-alpha olefin PAO4, poly-alpha olefin PAO5 and poly-alpha olefin PAO6; The polyether is prepared by ring-opening homopolymerization or copolymerization of one or more of ethylene oxide, propylene oxide and butylene oxide.

4. The anti-wear hydraulic fluid of claim 1 wherein, The anti-emulsifier is polyethylene oxide-propylene oxide block polyether.

5. A process for the preparation of an antiwear hydraulic fluid as claimed in claim 1, characterized in that, The method comprises the following steps: (1) 0.1-0.3 parts by weight of anti-rust agent is placed in a reaction kettle, heated to 125-135℃ and stirred for 2.5-2.5 hours; (2) composite base oil and 5-15 parts by weight of viscosity index improver, 5-10 parts by weight of solubilizer, 0.3-1 parts by weight of anti-wear agent, 0.3-0.8 parts by weight of anti-corrosion agent, 0.2-0.8 parts by weight of antioxidant and 0.3-1 parts by weight of pour point depressant are added and stirred uniformly, wherein the composite base oil is composed of 80-85 parts by weight of Group III hydrogenated base oil, 5-10 parts by weight of poly-alpha olefin or polyether; (3) Add 30-100 ppm of antifoam agent and 20-50 ppm of anti-emulsifier, and finally obtain a transparent and uniform finished product.

6. Use of an anti-wear hydraulic oil according to any one of claims 1 to 4 for the preparation of a hydraulic medium for a hydraulic device.

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