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

Abstract

The invention discloses a mineral oil type vacuum oil composition as well as a preparation method and application thereof. The composition comprises the following components in 100 parts by weight: 0.05-5 parts of a pour point depressant; 0.05 to 2 parts of an antioxidant; 0.001 to 0.05 part of an anti-foaming agent; and the balance of base oil. The pour point depressant is selected from at least one of polymethacrylate, a vinyl acetate-fumarate copolymer or poly-alpha-olefin; the antioxidant is selected from at least one of 2, 6-butylated hydroxytoluene, N-phenyl-alpha-naphthylamine and alkyl benzene-alpha-naphthylamine; the anti-foaming agent is selected from at least one of polysiloxane, a non-silicon composite anti-foaming agent or methyl silicone oil. According to the mineral oil type vacuum pump oil composition and the application thereof in the vacuum pump, the technical problem that in the prior art, a mineral oil type vacuum oil composition is poor in low temperature resistance is well solved, and the mineral oil type vacuum pump oil composition is suitable for special working conditions in cold regions and winter and beneficial to starting of the vacuum pump at the low temperature.

Description

Technical Field

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

[0002] Vacuum technology is a high-tech industry, especially the photovoltaic industry, solar cells, LEDs, liquid crystal displays, freeze drying, vacuum coating, etc., as well as the technical basis of major scientific research equipment such as accelerators and controlled nuclear fusion. The vacuum industry has become an important industry closely related to the country's scientific and technological strength. Vacuum pumps are important basic products used by humans in production and R&D activities. As humans have a deeper understanding of vacuum technology, fluid mechanics and other technologies and knowledge, the requirements for vacuum pumps are also constantly improving.

[0003] Vacuum pump oil is a special lubricant for various vacuum pumps. It is responsible for lubrication, sealing and cooling in the pump body. Oils that can meet multiple requirements at the same time are usually expensive. Therefore, suitable vacuum pump oil should be selected for different use conditions, which can not only extend the service life of the equipment and improve production efficiency, but also effectively reduce costs and produce good social benefits.

[0004] Normally, the low-temperature performance requirements for mineral oil vacuum pump oil are not high. The petrochemical industry standard requires that the temperature of mineral oil vacuum pump oil should not be higher than -9°C. However, in special application scenarios such as cold regions and winter, the temperature is as low as dozens of degrees below zero. In order to ensure the rapid start-up of the vacuum pump under low temperature conditions, the low-temperature performance of the vacuum pump oil needs to be higher.

[0005] The Chinese invention patent application publication CN112481003A discloses a 100# high-quality vacuum pump oil, which has a base oil content of 95% to 98% by mass, and is combined with a variety of additives, including 0.3% to 0.5% by mass of phenolic antioxidants, 0.3% to 0.5% by mass of amine antioxidants, 1.2% to 1.5% by mass of phosphate esters, and 0.01% to 0.03% by mass of defoaming agents. The 100# vacuum pump oil in the document uses appropriate components and reasonable dosages to promote the synergistic effect of each raw material component in the obtained 100# vacuum pump oil, and then promotes the synergistic effect of each raw material component through a specific preparation process; however, the pour point of the vacuum pump oil obtained by this method is -21°C, which is not enough to fully meet the needs of cold regions. Summary of the invention

[0006] The vacuum pump oil of the present invention adopts appropriate components and uses them in reasonable amounts, so that the raw material components can better play a synergistic role in the prepared vacuum pump oil, and then through a specific preparation process, the synergistic role of the raw material components is promoted.

[0007] 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.

[0008] One of the technical problems to be solved by the present invention is that the mineral oil type vacuum pump oil composition in the prior art cannot achieve a lower pour point when prepared using mineral oil, and a new vacuum pump oil composition is provided, which has a lower pour point and has the advantages of better anti-foaming and anti-oxidation properties.

[0009] The technical solution of the present invention is to provide a vacuum pump oil composition. The raw materials of the vacuum pump oil composition, calculated on a basis of 100 parts by weight, include: 0.05 to 5 parts of a pour point depressant; 0.05 to 2 parts of an antioxidant; 0.001 to 0.05 parts of an antifoaming agent; and the balance is base oil. The pour point depressant is selected from at least one of polymethacrylate, vinyl acetate-fumarate copolymer or poly-α-olefin, preferably polymethacrylate. The antioxidant is selected from at least one of 2,6-di-tert-butyl-p-cresol, N-phenyl-α-naphthylamine and / or alkylbenzene-α-naphthylamine and a mixture thereof, preferably 2,6-di-tert-butyl-p-cresol, which is cheap and can improve the oxidation performance of the oil product to a certain extent. The antifoaming agent is selected from at least one of polysiloxane, non-silicon composite antifoaming agent or methyl silicone oil and a mixture thereof, preferably methyl silicone oil.

[0010] The polymerization degrees of polymethacrylate, vinyl acetate-fumarate copolymer and poly-α-olefin are not limited, and the ratio of the structural units of the vinyl acetate-fumarate copolymer is not limited.

[0011] As a preferred technical solution, the base oil is selected from one or two of HVI Class I and HVI Class II base oils and prepared in proportion.

[0012] As a preferred technical solution, the base oil has a kinematic viscosity of 12 to 135 mm at 40°C. 2 / s.

[0013] The base oil has a kinematic viscosity of 12 mm at 40°C. 2 / s, 30mm 2 / s, 50mm 2 / s, 80mm 2 / s、100mm 2 / s, 120mm 2 / s, 135mm 2 / s, or any value between any two points above.

[0014] The second technical problem solved by the present invention is to provide a method for preparing a mineral oil type vacuum pump oil composition corresponding to the first technical problem solved, the method comprising mixing, stirring and heating the raw materials until they are completely dissolved to obtain the mineral oil type vacuum pump oil composition.

[0015] As a preferred technical solution, the temperature after heating is 50-80°C.

[0016] The temperature after heating is 50° C., 60° C., 70° C., 80° C., or any value between any two of the above points.

[0017] As a preferred technical solution, the mixing is carried out in a stirring manner, and the stirring conditions include: a stirring speed of 300 to 600 r / min and a stirring time of 0.5 to 2.5 h, so that all the ingredients are dissolved.

[0018] The stirring speed is 300 r / min, 400 r / min, 500 r / min, 600 r / min, or any value between any two of the above points.

[0019] The stirring time is 0.5h, 1h, 1.5h, 2.5h, or any value between any two of the above points.

[0020] The third technical problem solved by the present invention is to provide a use of a vacuum pump oil composition corresponding to the first technical problem solved, which is particularly suitable for working conditions with high requirements on low-temperature fluidity.

[0021] The present invention provides application of the mineral oil type vacuum pump oil composition in the field of vacuum pumps, in particular, application of the mineral oil type vacuum pump oil composition as lubricating oil for vacuum pumps.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The mineral oil vacuum pump oil composition of the present invention is added with preferred pour point depressants, antifoaming agents and antioxidants, and has the advantages of good low-temperature fluidity, antifoaming properties and antioxidant properties, thereby achieving good technical effects.

[0024] 2. The preparation method of the mineral oil type vacuum pump oil composition of the present invention, through the synergistic effect of different additives, does not use relatively high-cost synthetic base oil, and effectively reduces the preparation cost of vacuum pump oil suitable for special working conditions in cold regions and winter. DETAILED DESCRIPTION

[0025] 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.

[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation method, characteristics and effects of the mineral oil vacuum pump oil composition proposed by the present invention are described in detail below in combination with the preferred embodiments, but it is not used to limit the scope of the present invention.

[0027] In each embodiment of the present invention, the specific information of the reagents used is as follows:

[0028] 2,6-di-tert-butyl-p-cresol T501, manufacturer: Shanghai Huayi Group;

[0029] Polysiloxane Foam Ban 130B, manufacturer: Mengqingxin;

[0030] HVI II base oil, type HVI II, manufacturer: Sinopec;

[0031] HVI I base oil, type HVI I, manufacturer: Sinopec;

[0032] Phenyl-α-naphthylamine T531, manufacturer: Tianjin Yuning Chemical Co., Ltd.;

[0033] Alkylbenzene-α-naphthylamine L06, manufacturer: BASF;

[0034] Non-silicon composite antifoaming agent AMH2, manufacturer: BASF;

[0035] Methyl silicone oil T901, manufacturer: Sinopec;

[0036] Polymethacrylate Viscoplex 1-248, manufacturer: Evonik Additives GmbH;

[0037] Polymethacrylate T866, manufacturer: Sinopec;

[0038] Polyalphaolefin T803B, manufacturer: Wuxi Nanfang Petroleum Additives Co., Ltd.

[0039] Vinyl acetate-fumarate copolymer T806, manufacturer: Tianyu Petroleum Additive Factory;

[0040] 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.

[0041] Example 1

[0042] Mineral oil type vacuum pump oil composition, consisting of:

[0043] In parts by weight, it includes the following components:

[0044] Pour point depressant: polymethacrylate Viscoplex 1-248, 1 part;

[0045] Antioxidant: 2,6-di-tert-butyl-p-cresol T501, 0.5 parts;

[0046] Antifoaming agent: polysiloxane Foam Ban 130B, 0.01 parts;

[0047] Base oil: HVI I base oil, 98.49 parts.

[0048] The components and corresponding weight proportions of the mineral oil vacuum pump oil composition are shown in Table 1.

[0049] The preparation method of the mineral oil type vacuum pump oil composition of this embodiment is as follows:

[0050] Polymethacrylate Viscoplex 1-248, 2,6-di-tert-butyl-p-cresol T501, polysiloxane FoamBan 130B and HVI I base oil were uniformly mixed, heated to 60° C. and heated and stirred for 2 hours to completely dissolve them, thereby obtaining a mineral oil type vacuum pump oil composition 1#.

[0051] Example 2

[0052] Mineral oil type vacuum pump oil composition, consisting of:

[0053] In parts by weight, it includes the following components:

[0054] Pour point depressant: polymethacrylate T866, 3.5 parts;

[0055] Antioxidant: N-phenyl-α-naphthylamine T531, 0.3 parts;

[0056] Antifoaming agent: non-silicon composite antifoaming agent AMH2, 0.01 parts;

[0057] Base oil: HVI I base oil, 96.19 parts.

[0058] The components and corresponding weight proportions of the mineral oil vacuum pump oil composition are shown in Table 1.

[0059] The preparation method of the mineral oil type vacuum pump oil composition of this embodiment is as follows:

[0060] Polymethacrylate T866, N-phenyl-α-naphthylamine T531, non-silicon composite antifoaming agent AMH2 and HVI I base oil were uniformly mixed, heated to 60° C. and heated with stirring for 1 hour to completely dissolve them, thereby obtaining a mineral oil type vacuum pump oil composition 2#.

[0061] Example 3

[0062] Mineral oil type vacuum pump oil composition, consisting of:

[0063] In parts by weight, it includes the following components:

[0064] Pour point depressant: polymethacrylate T866, 0.05 parts;

[0065] Antioxidant: alkylbenzene-α-naphthylamine L06, 0.5 parts;

[0066] Antifoaming agent: methyl silicone oil T901, 0.003 parts;

[0067] Base oil: HVI I base oil, 99.447 parts.

[0068] The components and corresponding weight proportions of the mineral oil vacuum pump oil composition are shown in Table 1.

[0069] The preparation method of the mineral oil type vacuum pump oil composition of this embodiment is as follows:

[0070] Polymethacrylate T866, alkylbenzene-α-naphthylamine L06, methyl silicone oil T901 and HVI I base oil were uniformly mixed, and the mixture was heated to 60° C. and heated and stirred for 1 hour to completely dissolve the mixture, thereby obtaining a mineral oil type vacuum pump oil composition 3#.

[0071] Example 4

[0072] Mineral oil type vacuum pump oil composition, consisting of:

[0073] In parts by weight, it includes the following components:

[0074] Pour point depressant: poly alpha-olefin T803B, 0.25 parts;

[0075] Antioxidant: alkylbenzene-α-naphthylamine L06, 0.5 parts;

[0076] Antifoaming agent: non-silicon composite antifoaming agent AMH2, 0.01 parts;

[0077] Base oil: HVI II base oil, 99.24 parts.

[0078] The components and corresponding weight proportions of the mineral oil vacuum pump oil composition are shown in Table 1.

[0079] The preparation method of the mineral oil type vacuum pump oil composition of this embodiment is as follows:

[0080] Polyalphaolefin T803B, alkylbenzene-alpha-naphthylamine L06, non-silicon composite antifoaming agent AMH2 and HVI II base oil were uniformly mixed, heated to 60°C and heated with stirring for 1 hour to completely dissolve them, thereby obtaining a mineral oil type vacuum pump oil composition 4#.

[0081] Example 5

[0082] Mineral oil type vacuum pump oil composition, consisting of:

[0083] In parts by weight, it includes the following components:

[0084] Pour point depressant: polymethacrylate Viscoplex 1-248, 0.15 parts;

[0085] Antioxidant: 2,6-di-tert-butyl-p-cresol T501, 0.3 parts;

[0086] Antifoaming agent: methyl silicone oil T901, 0.005 parts;

[0087] Base oil: HVI II base oil, 99.545 parts.

[0088] The components and corresponding weight proportions of the mineral oil vacuum pump oil composition are shown in Table 1.

[0089] The preparation method of the mineral oil type vacuum pump oil composition of this embodiment is as follows:

[0090] Polymethacrylate Viscoplex 1-248, 2,6-di-tert-butyl-p-cresol T501, methyl silicone oil T901 and HVI II base oil were uniformly mixed, and the mixture was heated to 60° C. and heated and stirred for 1 hour to completely dissolve the mixture, thereby obtaining a mineral oil type vacuum pump oil composition 5#.

[0091] Example 6

[0092] Mineral oil type vacuum pump oil composition, consisting of:

[0093] In parts by weight, it includes the following components:

[0094] Pour point depressant: vinyl acetate-fumarate copolymer T806, 0.3 parts;

[0095] Antioxidant: 2,6-di-tert-butyl-p-cresol T501, 0.5 parts;

[0096] Antifoaming agent: non-silicon composite antifoaming agent AMH2, 0.01 parts;

[0097] Base oil: HVI Class I base oil, 49.595 parts;

[0098] HVI II base oil, 49.595 parts.

[0099] The components and corresponding weight proportions of the mineral oil vacuum pump oil composition are shown in Table 1.

[0100] The preparation method of the mineral oil type vacuum pump oil composition of this embodiment is as follows:

[0101] Vinyl acetate-fumarate copolymer T806, 2,6-di-tert-butyl-p-cresol T501, non-silicon composite antifoaming agent AMH2, HVI Class I base oil and HVI Class II base oil were uniformly mixed, heated to 60°C and heated with stirring for 2 hours to completely dissolve them, thereby obtaining a mineral oil type vacuum pump oil composition 6#.

[0102] Comparative Examples 1-2

[0103] The components of the vacuum pump oil composition are composed of the following: pour point depressant, antioxidant, antifoaming agent, and the balance of base oil. The components are mixed evenly, heated to 60°C and heated and stirred for 1 hour to completely dissolve them to prepare the vacuum pump oil composition. The compositions of comparative examples 1 to 2 are shown in Table 1.

[0104] Test Case

[0105] The mineral oil type vacuum pump oil compositions of Examples 1 to 6 were applied to vacuum pumps, and the mineral oil type vacuum pump oil compositions of Examples 1 to 6 and the vacuum pump oil compositions of Comparative Examples 1 to 2 were tested. The tests used are as follows:

[0106] Determination of foam characteristics of lubricating oil (GB / T 12579);

[0107] Determination of oxidation stability of lubricating oils - Rotating oxygen bomb method (SH / T 0193);

[0108] Pour point determination of petroleum products (GB / T 3535);

[0109] The test data of Examples 1 to 6 and Comparative Examples 1 to 2 obtained by the above method are shown in Table 2.

[0110] As can be seen from Table 2, in Examples 1 to 6, the pour point is as low as -36°C, and the compositions have good anti-foaming and anti-oxidation properties.

[0111] Table 1 Components and weight percentages of vacuum pump oil compositions prepared in Examples and Comparative Examples

[0112]

[0113] Table 2 Performance test results of vacuum pump oil compositions prepared in Examples 1 to 6 and Comparative Examples 1 to 2

[0114]

[0115] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A vacuum pump oil composition, characterized in that: The raw materials of the vacuum pump oil composition include, based on 100 parts by weight: 0.05 to 5 parts of pour point depressant; 0.05 to 2 parts of antioxidant; 0.001 to 0.05 parts of antifoaming agent; and the balance is base oil. The pour point depressant is selected from at least one of polymethacrylate, vinyl acetate-fumarate copolymer or poly-α-olefin; The antioxidant is selected from at least one of 2,6-di-tert-butyl-p-cresol, N-phenyl-α-naphthylamine, and alkylbenzene-α-naphthylamine; The antifoaming agent is selected from at least one of polysiloxane, non-silicon composite antifoaming agent or methyl silicone oil.

2. The vacuum pump oil composition according to claim 1, characterized in that The base oil has a kinematic viscosity of 12 to 135 mm at 40°C. 2 / s.

3. The vacuum pump oil composition according to claim 1 or 2, characterized in that: The base oil is selected from HVI Group I and / or HVI Group II base oils.

4. The method for preparing the vacuum pump oil composition according to any one of claims 1 to 3, characterized in that: The method comprises mixing and heating the raw materials to obtain the mineral oil type vacuum pump oil composition.

5. The preparation method according to claim 4, characterized in that: The temperature after heating is 50-80°C.

6. The preparation method according to claim 4, characterized in that: The mixing is carried out in a stirring manner, and the stirring conditions include: a stirring speed of 300 to 600 r / min and a stirring time of 0.5 to 2.5 h.

7. Use of the vacuum pump oil composition according to any one of claims 1 to 3 or the mineral oil type vacuum oil composition prepared by the preparation method according to any one of claims 4 to 6 as lubricating oil for vacuum pumps.

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