Mineral oil type vacuum pump oil composition as well as preparation method and application thereof

Abstract

The invention provides a mineral oil type vacuum pump oil composition and a preparation method and application thereof, and the mineral oil type vacuum pump oil composition comprises the following components by weight: 0.2-0.5% of an antioxidant; 0.4 to 0.8 part of an anti-wear agent; 0.005 to 0.02 percent of an anti-foaming agent; the balance is base oil, and the base oil is API I type paraffin-based base oil; the antioxidant is selected from at least one of 2, 6-butylated hydroxytoluene, alkylated diphenylamine or alkyl phenyl-alpha-naphthylamine; the anti-wear agent is selected from at least one of amino thioester and / or tricresyl phosphate; the anti-foaming agent is selected from polysiloxane and / or polyacrylate. According to the vacuum pump oil composition, the antioxidant, the anti-wear agent and the like in a proper proportion are added into the vacuum pump oil composition, so that the vacuum pump oil composition has relatively good anti-wear capability in the use process of oil products, also has certain anti-oxidation capability, can effectively slow down wear, and achieves a relatively good technical effect.

Description

Technical Field

[0001] The invention relates to a mineral oil type vacuum pump oil composition and a preparation method and application thereof, and relates to the technical field of vacuum pump oil. Background Art

[0002] Vacuum pumps have a wide range of applications and are commonly used in industries such as photovoltaics, food processing, medicine, metallurgy, and vacuum coating. Vacuum pump oil is a special lubricant for various mechanical vacuum pumps. It is responsible for lubrication, sealing, cooling, etc. Although there are different types of mechanical vacuum pumps, the quality of the oil directly affects the state of the vacuum equipment.

[0003] In some industries, vacuum pumps are used to extract high-temperature gases, which makes the temperature inside the pump high and the oil oxidation rate accelerates. Therefore, vacuum pump oil needs to have a certain ability to resist high-temperature oxidation. In addition, since some types of vacuum pumps contain bearings and gears, in order to meet their normal operation, the anti-wear properties of vacuum pump oil are required. Therefore, it is necessary to develop a vacuum pump oil with anti-oxidation and anti-wear properties.

[0004] The Chinese invention patent application publication CN 103060065 A discloses a vacuum pump oil, which uses a cycloalkyl base oil separated from a fraction and a variety of additives, and has antioxidant and extreme pressure and anti-wear properties. However, the base oil of the pump oil is a cycloalkyl base oil, and the anti-wear performance is not obvious.

[0005] The Chinese invention patent application publication CN 106753721 A discloses an anti-oxidation and anti-wear vacuum pump oil composition, which uses a Class II / Class III base oil and a variety of additives, has thermal oxidation stability but does not exhibit anti-wear performance. Summary of the invention

[0006] In order to solve the above problems in the prior art, the present invention provides a vacuum pump oil composition and a preparation method and application thereof.

[0007] One of the objects of the present invention is to provide a mineral oil type vacuum pump oil composition.

[0008] To achieve one of the above-mentioned purposes, the technical scheme adopted by the present invention is as follows: the components of the mineral oil type vacuum pump oil composition, by weight percentage, contain: 0.2-0.5% antioxidant, 0.4-0.8% antifoaming agent, and the balance is base oil; the base oil is API Class I base oil; the antioxidant is selected from at least one of 2,6-di-tert-butyl-p-cresol, alkylated diphenylamine (preferably butyl / octyl diphenylamine) and N-phenyl-α-naphthylamine and mixtures thereof; the antiwear agent is selected from aminothioesters and / or tricresyl phosphate; the antifoaming agent is selected from silicon-type and / or non-silicon antifoaming agents.

[0009] A second object of the present invention is to provide a method for preparing the vacuum pump oil composition.

[0010] To achieve the second purpose of the above invention, the present invention provides a method for preparing the above mineral oil type vacuum pump oil composition, comprising mixing and heating the antioxidant, antiwear agent, antifoaming agent and base oil to obtain the mineral oil type vacuum pump oil composition.

[0011] Optionally, the heating temperature is 55° C. to 60° C., and the heating time is 1.5 to 2.5 hours.

[0012] Optionally, the heating temperature is 55°C, 58°C, 60°C, or any value between any two of the above points; the heating time is 1.5 hours, 2 hours, 2.5 hours, or any value between any two of the above points.

[0013] As a specific embodiment, the method for preparing a mineral oil vacuum pump oil composition is to mix an antioxidant, an anti-wear agent and an anti-foaming agent with a base oil evenly, heat the mixture to 55°C to 60°C and heat and stir, maintain the mixture for 1.5h to 2.5h, and then filter the mixture to obtain the mineral oil vacuum pump oil composition.

[0014] The third object of the present invention is to provide the use of the mineral oil vacuum pump oil composition, which has a certain antioxidant capacity and excellent anti-wear performance. To achieve the third object of the above invention, the present invention provides the mineral oil vacuum pump oil composition in 10 5 ~10 -1 Applications in sealing and / or lubrication of mechanical vacuum pumps with Pa requirements, especially in working conditions with certain requirements for anti-wear.

[0015] The present invention adds antioxidants, anti-wear agents and the like in suitable proportions to the vacuum pump oil composition, thereby achieving good anti-wear ability during the use of the oil product and a certain anti-oxidation ability, which can effectively reduce wear and achieve good technical effects. DETAILED DESCRIPTION

[0016] In order to make the present invention more easily understood, the present invention will be described in detail below in conjunction with embodiments. These embodiments are only for illustration and are not intended to limit the application scope of the present invention.

[0017] The above raw materials in the present invention can be prepared in-house or commercially available, and the present invention is not particularly limited thereto.

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain this patent in detail and do not limit the scope of protection of the present invention in any way. Unless otherwise defined, the technical terms used in the following embodiments have the same meanings as those generally understood by technicians in the field to which the present invention belongs. The reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the raw materials, instruments and equipment used in the following examples, etc., can all be purchased on the market or can be obtained by existing methods; the reagent dosage, unless otherwise specified, is the reagent dosage in conventional experimental operations; the experimental methods, unless otherwise specified, are all conventional methods.

[0019] Sources of raw materials in the embodiments of the present invention:

[0020] In the present invention:

[0021] The base oil is API Class I, purchased from Sinopec, with the grade HVI Ib500.

[0022] 2,6-Di-tert-butyl-p-cresol was purchased from Jinzhou Petrochemical Fine Chemical Co., Ltd., brand T501.

[0023] Alkylated diphenylamine was purchased from Xinxiang Ruifeng Chemical Co., Ltd. with the brand name T534.

[0024] N-phenyl-α-naphthylamine was purchased from Danyang Tianyu Petroleum Additive Factory with the brand name T531.

[0025] Aminothioester, purchased from Xinxiang Ruifeng Chemical Co., Ltd., brand T323.

[0026] Tricresyl phosphate was purchased from Tianyu Petroleum Additive Factory with the brand name T306.

[0027] Benzotriazole octadecylamine salt was purchased from Tianyu Petroleum Additive Factory with the brand name T406.

[0028] Silicone antifoaming agent, purchased from Mengqingxin, brand number 155.

[0029] Non-silicone antifoaming agent, commercially available from BASF, brand AMH2.

[0030] Example 1

[0031] The mineral oil type vacuum pump oil composition comprises the following components by weight percentage:

[0032] Antioxidant: 0.3% 2,6-di-tert-butyl-p-cresol;

[0033] Antiwear agent: 0.5% aminothioester;

[0034] Antifoaming agent: 0.01% silicon-based antifoaming agent;

[0035] The balance is base oil, which is Sinopec API Class I paraffin-based base oil with a viscosity grade of 100.

[0036] The components and corresponding weight proportions of the mineral oil vacuum pump oil composition are shown in Table 1.

[0037] The preparation method comprises the following steps: uniformly mixing an antioxidant, an anti-wear agent and an anti-foaming agent with a base oil, heating the mixture to 55° C. and stirring the mixture under heating, maintaining the mixture for 1.5 to 2.5 hours, and filtering the mixture to obtain a mineral oil vacuum pump oil composition 1#.

[0038] Example 2

[0039] The mineral oil type vacuum pump oil composition comprises the following components by weight percentage:

[0040] Antioxidant: 0.2% alkylated diphenylamine;

[0041] Antiwear agent: 0.8% tricresyl phosphate;

[0042] Antifoaming agent: 0.01% non-silicone antifoaming agent;

[0043] The balance is base oil, which is Sinopec API Class I paraffin-based base oil with a viscosity grade of 100.

[0044] The components and corresponding weight proportions of the vacuum pump oil composition are shown in Table 1.

[0045] The preparation method comprises the following steps: uniformly mixing an antioxidant, an anti-wear agent and an anti-foaming agent with a base oil, heating the mixture to 55° C. and stirring the mixture under heating, maintaining the mixture for 1.5 to 2.5 hours, and filtering the mixture to obtain a mineral oil vacuum pump oil composition 2#.

[0046] Example 3

[0047] The mineral oil type vacuum pump oil composition comprises the following components by weight percentage:

[0048] Antioxidant: 0.2% N-phenyl-α-naphthylamine;

[0049] Antiwear agent: 0.5% aminothioester;

[0050] Antifoaming agent: 0.01% silicon-based antifoaming agent;

[0051] The balance is base oil, which is Sinopec API Class I paraffin-based base oil with a viscosity grade of 100.

[0052] The components and corresponding weight proportions of the vacuum pump oil composition are shown in Table 1.

[0053] The preparation method comprises the following steps: uniformly mixing an antioxidant, an anti-wear agent and an anti-foaming agent with a base oil, heating the mixture to 55° C. and stirring the mixture under heating, maintaining the mixture for 1.5 to 2.5 hours, and filtering the mixture to obtain a mineral oil vacuum pump oil composition 3#.

[0054] Example 4

[0055] The mineral oil type vacuum pump oil composition comprises the following components by weight percentage:

[0056] Antioxidant: 0.2% N-phenyl-α-naphthylamine;

[0057] Antiwear agent: 0.3% aminothioester;

[0058] Antifoaming agent: 0.01% non-silicon antifoaming agent;

[0059] The balance is base oil, which is Sinopec API Class I paraffin-based base oil with a viscosity grade of 100.

[0060] The preparation method comprises the following steps: uniformly mixing an antioxidant, an anti-wear agent and an anti-foaming agent with a base oil, heating the mixture to 55° C. and stirring the mixture under heating, maintaining the mixture for 1.5 to 2.5 hours, and filtering the mixture to obtain a mineral oil vacuum pump oil composition 4#.

[0061] Comparative Example 1

[0062] The mineral oil type vacuum pump oil composition comprises the following components by weight percentage:

[0063] Antioxidant: 0.3% 2,6-di-tert-butyl-p-cresol;

[0064] Antiwear agent: 0.3% aminothioester;

[0065] Antifoaming agent: 0.01% silicon-based antifoaming agent;

[0066] The balance is base oil, which is Sinopec API Class I paraffin-based base oil with a viscosity grade of 100.

[0067] The components and corresponding weight proportions of the vacuum pump oil composition are shown in Table 1.

[0068] The preparation method comprises the following steps: uniformly mixing an antioxidant, an anti-wear agent and an anti-foaming agent with a base oil, heating the mixture to 55° C. and stirring the mixture under heating for 1.5 to 2.5 hours, and then filtering the mixture to obtain a mineral oil vacuum pump oil composition A.

[0069] Comparative Example 2

[0070] The mineral oil type vacuum pump oil composition comprises the following components by weight percentage:

[0071] Antioxidant: 0.3% 2,6-di-tert-butyl-p-cresol;

[0072] Antiwear agent: 0.5% tricresyl phosphate;

[0073] Antifoaming agent: 0.01% silicon-based antifoaming agent;

[0074] The balance is base oil, which is Sinopec API Class I paraffin-based base oil with a viscosity grade of 100.

[0075] The components and corresponding weight proportions of the vacuum pump oil composition are shown in Table 1.

[0076] The preparation method comprises the following steps: uniformly mixing an antioxidant, an anti-wear agent and an anti-foaming agent with a base oil, heating the mixture to 55° C. and stirring the mixture under heating for 1.5 to 2.5 hours, and then filtering the mixture to obtain a mineral oil vacuum pump oil composition B.

[0077] Comparative Example 3

[0078] The mineral oil type vacuum pump oil composition comprises the following components by weight percentage:

[0079] Antioxidant: 0.3% 2,6-di-tert-butyl-p-cresol;

[0080] Antiwear agent: 0.5% benzotriazole octadecylamine salt;

[0081] Antifoaming agent: 0.01% silicon-based antifoaming agent;

[0082] The balance is base oil, which is Sinopec API Class I paraffin-based base oil with a viscosity grade of 100.

[0083] The components and corresponding weight proportions of the vacuum pump oil composition are shown in Table 1.

[0084] The preparation method comprises the following steps: uniformly mixing an antioxidant, an anti-wear agent and an anti-foaming agent with a base oil, heating the mixture to 55° C. and stirring the mixture under heating for 1.5 to 2.5 hours, and then filtering the mixture to obtain a mineral oil vacuum pump oil composition C.

[0085] The components and corresponding weight parts of the above examples and comparative examples are recorded in Table 1.

[0086] Table 1 Mineral oil type vacuum pump oil composition component formula

[0087]

[0088] Test Case

[0089] The mineral oil vacuum pump oil compositions prepared in the above examples and comparative examples were tested: the kinematic viscosity was tested according to GB / T 265, the antioxidant capacity was evaluated by a rotating oxygen bomb according to SH / T 0293, the anti-wear capacity was evaluated by the wear spot diameter according to NB / SH / T 0189, and the vacuum degree was evaluated by the ultimate total pressure according to GB / T19956.2. The test results are shown in Table 2.

[0090] Table 2 Test results data table

[0091]

[0092] According to Table 2, the lubricating oil composition prepared from the base oil, antioxidant, antiwear agent and antifoaming agent of the present invention can achieve good anti-oxidation and anti-wear effects, and the addition of T323 not only improves the anti-wear property of the lubricating oil, but also improves its antioxidant ability, and has good economy and operability.

Claims

1. A mineral oil type vacuum pump oil composition, in parts by weight, comprising the following components: Antioxidant 0.2-0.5%; Antiwear agent 0.4-0.8%; Antifoaming agent 0.005~0.02%; The balance is base oil, and the base oil is API Class I paraffin base oil; The antioxidant is selected from at least one of 2,6-di-tert-butyl-p-cresol, alkylated diphenylamine or N-phenyl-α-naphthylamine; The anti-wear agent is selected from at least one of aminothioester and / or tricresyl phosphate; The antifoaming agent is selected from silicon-based and / or non-silicon-based antifoaming agents.

2. The method for preparing the mineral oil type vacuum pump oil composition according to claim 1, characterized in that: The method comprises mixing and heating the antioxidant, anti-wear agent, anti-foaming agent and base oil to obtain the mineral oil type vacuum pump oil composition.

3. The preparation method according to claim 2, characterized in that: The heating conditions include: heating temperature of 55° C. to 60° C., and heating time of 1.5 to 2.5 hours.

4. The preparation method according to claim 2 or 3, characterized in that: The mixing is carried out in a stirring manner, and the stirring conditions include: a stirring speed of 500 to 1500 r / min and a stirring time of 1.5 to 2.5 h.

5. Use of the mineral oil type vacuum pump oil composition according to claim 1 or the mineral oil type vacuum pump oil composition obtained by the preparation method of any one of claims 2 to 4, characterized in that: The vacuum degree during application is 10 5 ~10 -1 Pa.

6. The use according to claim 5, characterized in that For sealing and / or lubrication of mechanical vacuum pumps.

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