Marine tail shaft oil composition as well as preparation method and application thereof

Abstract

The invention relates to the technical field of lubricating oil, and provides a marine tail shaft oil composition as well as a preparation method and application thereof. The marine tail shaft oil composition comprises the following components in parts by weight: 1-5 parts of a clearing agent, 1-5 parts of a dispersing agent, 1-5 parts of an antioxidant, 0.01-1 part of a pour point depressant, 0.01-0.5 part of an anti-foaming agent and 83.5-96.98 parts of base oil, wherein the clearing agent comprises high-base-number synthetic calcium sulfonate and high-base-number sulfurized calcium alkyl phenolate. The marine tail shaft oil composition provided by the invention has excellent water diversion and anti-emulsification performance, still has good comprehensive performance in a water-containing environment, and completely meets the requirements of using working conditions of a marine tail shaft.

Description

Technical Field

[0001] The invention relates to the technical field of lubricating oils, and more specifically to a marine tail shaft oil composition, a preparation method and application thereof. Background Art

[0002] The ship's tail shaft is a device that connects the engine and propeller. It has a sealing function and requires the use of lubricating oil during its use. Due to the complex and changeable sailing conditions, it is inevitable that seawater will infiltrate the tail shaft device, which poses a great challenge to the performance of the lubricating oil. Therefore, the lubricating oil used in the tail shaft device needs to have good water resistance and still maintain good performance in the water-containing state. Ordinary lubricating oils are difficult to meet this requirement and cannot be used in ship tail shaft devices.

[0003] Chinese patent CN105623788A discloses a lubricating oil composition, which is prepared by alkyl mercaptan ester, demulsifier, detergent, antioxidant, dispersant and lubricating base oil, and improves the water separation and anti-emulsification performance of the oil by adding demulsifier. However, the patent does not involve the change of oil performance in a water environment, nor does it mention whether it can be applied to the tail shaft device of a ship. Summary of the invention

[0004] The object of the present invention is to provide a marine tail shaft oil composition and a preparation method thereof, so as to solve the technical problem that ordinary lubricating oil is difficult to maintain good performance in a water-containing state and cannot be used in a ship tail shaft device.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] In a first aspect, the present invention provides a marine stern shaft oil composition, comprising the following components in parts by weight:

[0007] Detergent: 1 to 5 parts by weight;

[0008] Dispersant: 1 to 5 parts by weight;

[0009] Antioxidant: 1 to 5 parts by weight;

[0010] Pour point depressant: 0.01-1 parts by weight;

[0011] Antifoaming agent: 0.01-0.5 parts by weight;

[0012] Base oil: 83.5-96.98 parts by weight;

[0013] The detergent includes overbased synthetic calcium sulfonate and overbased sulfurized alkyl phenate calcium.

[0014] According to some embodiments of the present invention, the mass ratio of the overbased synthetic calcium sulfonate to the overbased sulfurized alkyl phenate calcium is (0.1-3):1.

[0015] According to some embodiments of the present invention, the mass ratio of the overbased synthetic calcium sulfonate to the overbased sulfurized alkyl phenate calcium is (0.5-2):1.

[0016] According to some embodiments of the present invention, the total base number of the marine stern shaft oil composition is 5-6.

[0017] According to some embodiments of the present invention, the antioxidant includes at least one of zinc dithiophosphate, amine antioxidants, phenolic antioxidants, thioether antioxidants, and carbamate antioxidants.

[0018] According to some embodiments of the present invention, the antioxidant includes zinc dithiophosphate, dinonyldiphenylamine and phenol ester type antioxidant.

[0019] According to some embodiments of the present invention, the mass ratio of the zinc dithiophosphate, dinonyldiphenylamine and phenolic ester antioxidant is 1:(0.2-1):(0.2-1).

[0020] According to some embodiments of the present invention, the zinc dithiophosphate includes at least one of bis-octyl zinc dithiophosphate (T203) and primary / secondary alkyl zinc dithiophosphate (T204).

[0021] According to some embodiments of the present invention, the dispersant includes at least one of monosuccinimide (T151), bissuccinimide (T154A), and monoolefin succinimide (T155).

[0022] According to some embodiments of the present invention, the pour point depressant includes at least one of polymethacrylate (VX1-248) and polyalphaolefin (T803A).

[0023] According to some embodiments of the present invention, the anti-foaming agent includes at least one of methyl silicone oil (T901) and methyl silicone ester (T903).

[0024] According to some embodiments of the present invention, the base oil includes at least one of Group I base oil and Group II base oil.

[0025] In a second aspect, the present invention provides a method for preparing the marine stern shaft oil composition described in the first aspect, comprising: adding a detergent, a dispersant, an antioxidant, and a pour point depressant to a base oil, heating the base oil to 40 to 70° C., stirring the base oil at a rate of 400 to 1000 rpm for 15 to 120 min, adding an anti-foaming agent, and stirring the base oil for 30 to 120 min to obtain the marine stern shaft oil composition.

[0026] In a third aspect, the present invention provides use of the marine tail shaft oil composition described in the first aspect in a ship tail shaft device.

[0027] The beneficial effects of the present invention are at least:

[0028] The marine tail shaft oil composition provided by the present invention has excellent water separation and anti-emulsification performance, and still has good comprehensive performance in a water-containing environment, and can fully meet the operating conditions of the ship's tail shaft. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, 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.

[0030] Unless otherwise defined, the technical terms used in the following examples have the same meanings as those generally understood by those skilled in the art 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 amounts, unless otherwise specified, are the reagent amounts used in conventional experimental operations; the experimental methods, unless otherwise specified, are all conventional methods.

[0031] In the various embodiments and comparative examples of the present invention, the amount of each component used is in parts by weight.

[0032] Example 1

[0033] The composition ratio of the tail shaft oil composition is:

[0034] Detergent: 0.6 parts of high base synthetic calcium sulfonate T106, 0.6 parts of high base sulfurized alkyl phenol calcium T122;

[0035] Dispersant: 2 parts of polysuccinimide T155;

[0036] Antioxidant: 1 part of zinc dioctyl dithiophosphate T203, 0.4 part of dinonyl diphenylamine T558, 0.4 part of phenolic ester antioxidant T508;

[0037] Pour point depressant: 0.5 parts of polymethacrylate type pour point depressant VX1-248;

[0038] Antifoaming agent: 0.08 parts of methyl silicone oil antifoaming agent T901;

[0039] Base oil: 94.42 parts of Class I base oil.

[0040] Preparation method: Add detergent, dispersant, antioxidant and pour point depressant to the base oil, heat to 55°C, stir at 600 rpm for 0.5 h, add anti-foaming agent after mixing evenly, continue stirring for 1 h to obtain the tail shaft oil composition.

[0041] Example 2

[0042] The composition ratio of the tail shaft oil composition is:

[0043] Detergent: 0.8 parts of high base synthetic calcium sulfonate T106, 0.4 parts of high base sulfurized alkyl phenol calcium T122;

[0044] Dispersant: 1 part monoolefin succinimide T155;

[0045] Antioxidant: 1 part of zinc dioctyl dithiophosphate T203, 0.4 part of dinonyl diphenylamine T558, 0.4 part of phenolic ester antioxidant T508;

[0046] Pour point depressant: 0.3 parts of polymethacrylate type pour point depressant VX1-248;

[0047] Antifoaming agent: 0.08 parts of methyl silicone oil antifoaming agent T901;

[0048] Base oil: 95.62 parts of Group II base oil.

[0049] The preparation method is as in Example 1.

[0050] Example 3

[0051] The composition ratio of the tail shaft oil composition is:

[0052] Detergent: 0.4 parts of high base synthetic calcium sulfonate T106, 0.8 parts of high base sulfurized alkyl phenol calcium T122;

[0053] Dispersant: 3 parts of monoolefin succinimide T155;

[0054] Antioxidant: 1 part of zinc dioctyl dithiophosphate T203, 0.4 part of dinonyl diphenylamine T558, 0.4 part of phenolic ester antioxidant T508;

[0055] Pour point depressant: 0.7 parts of polymethacrylate type pour point depressant VX1-248;

[0056] Antifoaming agent: 0.06 parts of methyl silicone oil antifoaming agent T901;

[0057] Base oil: 93.24 parts of Group II base oil.

[0058] The preparation method is as in Example 1.

[0059] Example 4

[0060] The composition ratio of the tail shaft oil composition is:

[0061] Detergent: 0.6 parts of high base synthetic calcium sulfonate T106, 0.6 parts of high base sulfurized alkyl phenol calcium T122;

[0062] Dispersant: 2 parts of monoolefin succinimide T155;

[0063] Antioxidant: 1 part of primary / secondary alkyl dithiophosphate zinc T204, 0.4 part of dinonyl diphenylamine T558, 0.4 part of phenolic ester antioxidant T508;

[0064] Pour point depressant: 0.5 parts of polymethacrylate type pour point depressant VX1-248;

[0065] Antifoaming agent: 0.08 parts of methyl silicone oil antifoaming agent T901;

[0066] Base oil: 94.42 parts of Class I base oil.

[0067] The preparation method is as in Example 1.

[0068] Comparative Example 1

[0069] The composition ratio of the tail shaft oil composition is:

[0070] Detergent: 1 part of high base sulfurized alkyl phenol calcium T122;

[0071] Dispersant: 2 parts of polysuccinimide T155;

[0072] Antioxidant: 1 part of zinc dioctyl dithiophosphate T203, 0.4 part of dinonyl diphenylamine T558, 0.4 part of phenolic ester antioxidant T508;

[0073] Pour point depressant: 0.5 parts of polymethacrylate type pour point depressant VX1-248;

[0074] Antifoaming agent: 0.08 parts of methyl silicone oil antifoaming agent T901;

[0075] Base oil: 94.62 parts of Class I base oil.

[0076] The preparation method is as in Example 1.

[0077] Comparative Example 2

[0078] The composition ratio of the tail shaft oil composition is:

[0079] Detergent: 1 part of high base synthetic calcium sulfonate T106;

[0080] Dispersant: 2 parts of polysuccinimide T155;

[0081] Antioxidant: 1 part of zinc dioctyl dithiophosphate T203, 0.4 part of dinonyl diphenylamine T558, 0.4 part of phenolic ester antioxidant T508;

[0082] Pour point depressant: 0.5 parts of polymethacrylate type pour point depressant VX1-248;

[0083] Antifoaming agent: 0.08 parts of methyl silicone oil antifoaming agent T901;

[0084] Base oil: 94.62 parts of Class I base oil.

[0085] The preparation method is as in Example 1.

[0086] Comparative Example 3

[0087] The composition ratio of the tail shaft oil composition is:

[0088] Detergent: 0.6 parts of high base synthetic calcium sulfonate T106, 0.6 parts of high base sulfurized alkyl phenol calcium T122;

[0089] Dispersant: 2 parts of polysuccinimide T155;

[0090] Antioxidant: 1 part of dioctyl zinc dithiophosphate T203, 0.8 part of dinonyl diphenylamine T558;

[0091] Pour point depressant: 0.5 parts of polymethacrylate type pour point depressant VX1-248;

[0092] Antifoaming agent: 0.08 parts of methyl silicone oil antifoaming agent T901;

[0093] Base oil: 94.42 parts of Class I base oil.

[0094] The preparation method is as in Example 1.

[0095] Comparative Example 4

[0096] The composition ratio of the tail shaft oil composition is:

[0097] Detergent: 0.6 parts of high base synthetic calcium sulfonate T106, 0.6 parts of high base sulfurized alkyl phenol calcium T122;

[0098] Dispersant: 2 parts of polysuccinimide T155;

[0099] Antioxidant: 1 part of zinc dioctyl dithiophosphate T203, 0.8 part of phenolic antioxidant T508;

[0100] Pour point depressant: 0.5 parts of polymethacrylate type pour point depressant VX1-248;

[0101] Antifoaming agent: 0.08 parts of methyl silicone oil antifoaming agent T901;

[0102] Base oil: 94.42 parts of Class I base oil.

[0103] The preparation method is as in Example 1.

[0104] Comparative Example 5

[0105] The composition ratio of the tail shaft oil composition is:

[0106] Detergent: 0.6 parts of high base synthetic calcium sulfonate T106, 0.6 parts of high base sulfurized alkyl phenol calcium T122;

[0107] Dispersant: 2 parts of polysuccinimide T155;

[0108] Antioxidant: 0.9 parts of dinonyl diphenylamine T558, 0.9 parts of phenol ester antioxidant T508;

[0109] Pour point depressant: 0.5 parts of polymethacrylate type pour point depressant VX1-248;

[0110] Antifoaming agent: 0.08 parts of methyl silicone oil antifoaming agent T901;

[0111] Base oil: 94.42 parts of Class I base oil.

[0112] The preparation method is as in Example 1.

[0113] Comparative Example 6

[0114] The composition ratio of the tail shaft oil composition is:

[0115] Detergent: 0.6 parts of high base synthetic calcium sulfonate T106, 0.6 parts of high base sulfurized alkyl phenol calcium T122;

[0116] Dispersant: 2 parts of polysuccinimide T155;

[0117] Antioxidant: 0.5 parts of zinc dioctyl dithiophosphate T203, 0.2 parts of dinonyl diphenylamine T558, 0.2 parts of phenolic ester antioxidant T508;

[0118] Pour point depressant: 0.5 parts of polymethacrylate type pour point depressant VX1-248;

[0119] Antifoaming agent: 0.08 parts of methyl silicone oil antifoaming agent T901;

[0120] Base oil: 95.32 parts of Class I base oil.

[0121] The preparation method is as in Example 1.

[0122] Comparative Example 7

[0123] The composition ratio of the tail shaft oil composition is:

[0124] Detergent: 0.8 parts of medium base synthetic calcium sulfonate T105, 0.8 parts of high base sulfurized alkyl phenol calcium T122;

[0125] Dispersant: 2 parts of polysuccinimide T155;

[0126] Antioxidant: 1 part of zinc dioctyl dithiophosphate T203, 0.4 part of dinonyl diphenylamine T558, 0.4 part of phenolic ester antioxidant T508;

[0127] Pour point depressant: 0.5 parts of polymethacrylate type pour point depressant VX1-248;

[0128] Antifoaming agent: 0.08 parts of methyl silicone oil antifoaming agent T901;

[0129] Base oil: 94.02 parts of Class I base oil.

[0130] The preparation method is as in Example 1.

[0131] Comparative Example 8

[0132] The composition ratio of the tail shaft oil composition is:

[0133] Detergent: 0.8 parts of high base calcium salicylate T109, 0.8 parts of high base calcium sulfide alkylphenol T122;

[0134] Dispersant: 2 parts of monoolefin succinimide T155;

[0135] Antioxidant: 1 part of zinc dioctyl dithiophosphate T203, 0.4 part of dinonyl diphenylamine T558, 0.4 part of phenolic ester antioxidant T508;

[0136] Pour point depressant: 0.5 parts of polymethacrylate type pour point depressant VX1-248;

[0137] Antifoaming agent: 0.08 parts of methyl silicone oil antifoaming agent T901;

[0138] Base oil: 94.02 parts of Class I base oil.

[0139] The preparation method is as in Example 1.

[0140] Comparative Example 9

[0141] The composition ratio of the tail shaft oil composition is:

[0142] Detergent: 0.8 parts of high base synthetic calcium sulfonate T106, 0.8 parts of medium base calcium naphthenate T112;

[0143] Dispersant: 2 parts of monoolefin succinimide T155;

[0144] Antioxidant: 1 part of zinc dioctyl dithiophosphate T203, 0.4 part of dinonyl diphenylamine T558, 0.4 part of phenolic ester antioxidant T508;

[0145] Pour point depressant: 0.5 parts of polymethacrylate type pour point depressant VX1-248;

[0146] Antifoaming agent: 0.08 parts of methyl silicone oil antifoaming agent T901;

[0147] Base oil: 94.02 parts of Class I base oil.

[0148] The preparation method is as in Example 1.

[0149] The formulations of the tail shaft oil compositions of the embodiments and comparative examples are shown in Table 1.

[0150] Table 1 Formula composition of tail shaft oil composition of each embodiment and comparative example

[0151]

[0152] The tail shaft oil compositions prepared in the examples and comparative examples were tested for water separation and demulsification performance. The test methods adopted the marine oil water separation test method (SH / T 0619-1995) and the petroleum and petroleum synthetic liquid demulsification performance test method (GB / T 7305-2003). The test results are shown in Table 2.

[0153] The water separation and demulsification tests examine the water separation ability of oil products. In the water separation test, the more water layers the oil has, the fewer emulsion layers it has, and the better the water separation performance. In the demulsification test, the more thorough the separation of the oil and water phases, the fewer emulsion layers it has, and the better the demulsification performance.

[0154] Table 2 Water separation and demulsification test results

[0155]

[0156]

[0157] 1 wt% of water was added to the tail shaft oil composition prepared in the embodiment and the comparative example, and the anti-oxidation and anti-wear performance of the oil in a water-containing environment was tested. The test method adopted the determination of lubricant load-bearing capacity-four-ball method (GB / T 3142-2019) and the determination method of lubricant oxidation induction period-pressure differential scanning calorimetry (SH / T 0719-2002). The test results are shown in Table 3.

[0158] The four-ball test and oxidation induction period test respectively test the anti-wear performance and anti-oxidation performance of oil products. The higher the maximum no-seizure load and sintering load of the four-ball test, the better the anti-wear performance. The longer the oxidation induction period, the better the anti-oxidation performance.

[0159] Table 3 Oil performance in water-containing environment

[0160]

[0161]

[0162] By comparing the test results of Example 1 with those of Comparative Examples 1-2 and 7-9, it can be seen that in the tail shaft oil composition provided by the present invention, the detergent is compounded with high base synthetic calcium sulfonate T106 and high base sulfurized alkyl phenol calcium T122, which can effectively improve the water separation performance of the oil.

[0163] By comparing the test results of Examples 1 and 4 with Comparative Examples 3-5, it can be seen that in the tail shaft oil composition provided by the present invention, the antioxidant is a compound of zinc dithiophosphate, dinonyldiphenylamine, and phenolic ester antioxidant, which can make the oil have better antioxidant and anti-wear properties.

[0164] It should be noted that the embodiments described above are only used to explain the present invention and do not constitute any limitation to the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than restrictive words. The present invention may be modified as specified within the scope of the claims of the present invention, and the present invention may be revised without departing from the scope and spirit of the present invention. Although the present invention described therein relates to specific methods, materials and embodiments, it does not mean that the present invention is limited to the specific examples disclosed therein, on the contrary, the present invention can be extended to all other methods and applications with the same functions.

Claims

1. A marine stern shaft oil composition, characterized in that: The composition comprises the following components in parts by weight: Detergent: 1 to 5 parts by weight; Dispersant: 1 to 5 parts by weight; Antioxidant: 1 to 5 parts by weight; Pour point depressant: 0.01-1 parts by weight; Antifoaming agent: 0.01-0.5 parts by weight; Base oil: 83.5-96.98 parts by weight; The detergent includes overbased synthetic calcium sulfonate and overbased sulfurized alkyl phenate calcium.

2. The marine stern shaft oil composition according to claim 1, characterized in that: The mass ratio of the high base synthetic calcium sulfonate to the high base sulfurized alkyl phenol calcium is (0.1-3):

1.

3. The marine stern shaft oil composition according to claim 1 or 2, characterized in that: The antioxidant includes at least one of zinc dithiophosphate, amine antioxidant, phenol antioxidant, thioether antioxidant, and carbamate antioxidant; preferably, the antioxidant includes zinc dithiophosphate, dinonyldiphenylamine, and phenol ester antioxidant.

4. The marine stern shaft oil composition according to any one of claims 1 to 3, characterized in that: The mass ratio of the zinc dithiophosphate, dinonyldiphenylamine and phenolic ester antioxidant is 1:(0.2-1):(0.2-1).

5. The marine stern shaft oil composition according to any one of claims 1 to 4, characterized in that: The dispersant includes at least one of monosuccinimide, bissuccinimide, and monoolefin succinimide.

6. The marine stern shaft oil composition according to any one of claims 1 to 5, characterized in that: The pour point depressant includes at least one of polymethacrylate and polyalphaolefin.

7. The marine stern shaft oil composition according to any one of claims 1 to 6, characterized in that: The anti-foaming agent includes at least one of methyl silicone oil and methyl silicone ester.

8. The marine stern shaft oil composition according to any one of claims 1 to 7, characterized in that: The base oil includes at least one of Group I base oil and Group II base oil.

9. A method for preparing a marine stern shaft oil composition according to any one of claims 1 to 8, characterized in that: include: The marine tail shaft oil composition is prepared by adding a detergent, a dispersant, an antioxidant and a pour point depressant to the base oil, heating the mixture to 40-70°C, stirring the mixture at a rate of 400-1000 rpm for 15-120 minutes, adding an antifoaming agent and stirring the mixture for 30-120 minutes.

10. Use of the marine tail shaft oil composition according to any one of claims 1 to 8 in a ship tail shaft device.

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