Preparation method of mineral type heat-conducting oil

Abstract

The invention discloses a preparation method of mineral type heat conduction oil. The invention belongs to the technical field of heat-conducting oil preparation, by optimizing an antioxidant formula and a dynamic stabilization treatment process, the heat-conducting oil is not easy to oxidize and decompose during long-term operation in a high-temperature environment, and the service life is prolonged; meanwhile, a plurality of antioxidants are adopted to achieve a synergistic effect, and vacuum degassing treatment is combined, so that generation of free radicals is effectively inhibited, and the aging rate of the heat-conducting oil is reduced; by adding the functional nano material, the heat conductivity coefficient of the heat-conducting oil is remarkably improved, so that the heat-conducting oil is excellent in performance under complex working conditions; by scientifically adjusting the ratio of the base oil to the thickening agent, the heat-conducting oil is ensured to have good compatibility with sealing elements and pipelines made of different materials, and the problem of precipitation or volatilization is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of heat transfer oil preparation, and specifically refers to a method for preparing mineral heat transfer oil. Background Art

[0002] With the continuous development of industrial technology, mineral heat transfer oil has been widely used in the industrial field due to its excellent thermal conductivity and good chemical stability, especially playing an important role in high-temperature heat transfer systems. However, the existing mineral heat transfer oil still has many shortcomings in practical applications, especially in terms of high-temperature stability, oxidation resistance and comprehensive performance, which seriously limits its further promotion and use in high-demand scenarios.

[0003] After searching, it was found that an oil-cooled inverter heat sink with a publication number of CN105530800B uses non-polar mineral oil as a cooling medium and directly contacts the circuit board to achieve efficient heat dissipation. Although this design can effectively prevent dust and water vapor from polluting the circuit board and transfer heat to the peripheral heat sink through the good thermal conductivity of mineral oil, the mineral oil used is not optimized for oxidation resistance and long-term stability in high temperature environments. Therefore, under long-term high-temperature operation conditions, mineral oil is prone to oxidative decomposition, resulting in a decrease in thermal conductivity, which not only affects the heat dissipation effect of the equipment, but may also shorten the service life of the equipment.

[0004] In addition, a thermally conductive and electrically conductive elastomer material and its preparation method with publication number CN102702662B proposes a composite material containing mineral oil, and achieves a higher thermal conductivity (above 4W / m·K) by adding metal fibers, nano copper powder and other components. However, the mineral oil in this scheme is mainly used as a filler, and its thermal conductivity and high temperature adaptability are not specifically improved. At the same time, due to the compatibility problem between mineral oil and elastomer materials, precipitation or volatilization may occur in a high temperature environment, thereby reducing the stability and thermal conductivity of the overall material.

[0005] The above problems show that the mineral heat transfer oil in the prior art has obvious deficiencies in high temperature stability, oxidation resistance and comprehensive performance, and it is difficult to meet the demand of modern industry for high-performance heat transfer oil. Especially under complex working conditions, such as high temperature, high pressure or long-term operation environment, the performance degradation problem of mineral heat transfer oil is particularly prominent. Therefore, a new method for preparing mineral heat transfer oil is urgently needed, which can significantly improve its high temperature stability, oxidation resistance and thermal conductivity by optimizing the formula and process conditions, so as to meet the urgent demand of the industrial field for high-performance heat transfer oil. Summary of the invention

[0006] The purpose of the present invention is to provide a method for preparing a mineral heat-conducting oil, and the present invention aims to significantly improve the high-temperature stability, oxidation resistance and thermal conductivity of the mineral heat-conducting oil; the present invention optimizes the antioxidant formula and the dynamic stabilization treatment process, so that the heat-conducting oil is not prone to oxidative decomposition when it is operated for a long time in a high-temperature environment, thereby extending the service life; at the same time, a plurality of antioxidants are used in synergy, and combined with vacuum degassing treatment, the generation of free radicals is effectively inhibited, and the aging rate of the heat-conducting oil is reduced; the present invention significantly improves the thermal conductivity of the heat-conducting oil by adding functional nanomaterials, so that it performs well under complex working conditions; and by scientifically adjusting the ratio of base oil and thickener, it is ensured that the heat-conducting oil has good compatibility with seals and pipes of different materials to avoid precipitation or volatilization problems.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a method for preparing a mineral heat-conducting oil, wherein the mineral heat-conducting oil comprises the following components in parts by weight: 30-90 parts of base oil, 5-20 parts of antioxidant, 5-15 parts of thickener and 10-30 parts of functional additive.

[0008] Preferably, the mineral heat transfer oil comprises the following components in parts by weight: 60-70 parts of base oil, 6-10 parts of antioxidant, 8-12 parts of thickener and 16-18 parts of functional additive.

[0009] Preferably, the base oil is prepared by using the first mineral oil, the second mineral oil and the modified vegetable oil in a weight ratio of (40-50):(30-40):(10-20).

[0010] Preferably, the first mineral oil comprises high-purity mineral oil with product model H40X of Shell Company.

[0011] Preferably, the second mineral oil comprises a base oil of ExxonMobil product model M220.

[0012] Preferably, the modified vegetable oil is composed of soybean oil and epoxy fatty acid methyl ester in a weight ratio of (80-90):(10-20).

[0013] Preferably, the antioxidant is prepared by compounding diphenylamine, thiodipropionate, phosphite and phenolic antioxidant in a weight ratio of 2.5:2.0:0.8:1.2.

[0014] Preferably, the thickener is prepared by compounding polyisobutylene, polymethacrylate and polyamide in a weight ratio of 1.5:1.0:0.7.

[0015] Preferably, the functional additive is prepared by compounding nano-aluminum oxide, nano-boron nitride, graphene and silane coupling agent in a weight ratio of 3.5:2.5:2.0:0.8.

[0016] The present invention also provides a method for preparing mineral heat transfer oil, the method comprising the following steps:

[0017] (1) mixing the base oil, antioxidant, thickener and functional additive in a weight ratio to obtain a premix;

[0018] (2) subjecting the premix to ultrasonic dispersion treatment, followed by vacuum degassing treatment to obtain an intermediate material;

[0019] (3) subjecting the intermediate material to dynamic stabilization treatment under high temperature and high pressure conditions, cooling it to room temperature and filtering it to obtain the mineral-based heat transfer oil.

[0020] The beneficial effects achieved by the present invention using the above structure are as follows: (1) The present invention optimizes the antioxidant formula and the dynamic stabilization treatment process, so that the heat transfer oil is not prone to oxidative decomposition when it runs for a long time in a high-temperature environment, thereby extending its service life; (2) The present invention uses a variety of antioxidants to act synergistically, and combines vacuum degassing treatment to effectively inhibit the generation of free radicals and reduce the aging rate of the heat transfer oil; (3) The present invention significantly improves the thermal conductivity of the heat transfer oil by adding functional nanomaterials, so that it performs well under complex working conditions; (4) The present invention ensures that the heat transfer oil has good compatibility with seals and pipes of different materials by scientifically adjusting the ratio of base oil and thickener, thereby avoiding precipitation or volatilization problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Thermal conductivity of mineral heat transfer oil.

[0022] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Unless otherwise defined, all professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein may be applied to the present invention. The preferred implementation methods and materials described herein are for demonstration purposes only and are not intended to limit the content of this application.

[0025] The experimental methods in the following examples are conventional methods unless otherwise specified; the experimental materials and test strains used in the following examples are purchased from commercial channels unless otherwise specified.

[0026] Example 1

[0027] A method for preparing mineral heat-conducting oil

[0028] The mineral heat transfer oil comprises the following components in parts by weight: 60 parts of base oil, 10 parts of antioxidant, 8 parts of thickener and 18 parts of functional additive.

[0029] The base oil is prepared by using a first mineral oil, a second mineral oil and a modified vegetable oil in a weight ratio of 2:2:1.

[0030] Wherein, the first mineral oil comprises high-purity mineral oil with product model H40X of Shell Company.

[0031] Wherein, the second mineral oil includes base oil of ExxonMobil product model M220.

[0032] The modified vegetable oil is composed of soybean oil and epoxy fatty acid methyl ester in a weight ratio of 4:1.

[0033] The antioxidant is prepared by compounding diphenylamine, thiodipropionate, phosphite and phenolic antioxidant in a weight ratio of 2.5:2.0:0.8:1.2.

[0034] The thickener is prepared by compounding polyisobutylene, polymethacrylate and polyamide in a weight ratio of 1.5:1.0:0.7.

[0035] The functional additive is prepared by compounding nano-aluminum oxide, nano-boron nitride, graphene and silane coupling agent in a weight ratio of 3.5:2.5:2.0:0.8.

[0036] The present invention also provides a method for preparing mineral heat transfer oil, the method comprising the following steps:

[0037] (1) mixing the base oil, antioxidant, thickener and functional additive in a weight ratio to obtain a premix;

[0038] (2) subjecting the premix to ultrasonic dispersion treatment, followed by vacuum degassing treatment to obtain an intermediate material;

[0039] (3) subjecting the intermediate material to dynamic stabilization treatment under high temperature and high pressure conditions, cooling it to room temperature and filtering it to obtain the mineral-based heat transfer oil.

[0040] Example 2

[0041] A method for preparing mineral heat-conducting oil

[0042] The mineral heat transfer oil comprises the following components in parts by weight: 70 parts of base oil, 6 parts of antioxidant, 12 parts of thickener and 16 parts of functional additive.

[0043] The base oil is prepared by using a first mineral oil, a second mineral oil and a modified vegetable oil in a weight ratio of 5:4:1.

[0044] Wherein, the first mineral oil comprises high-purity mineral oil with product model H40X of Shell Company.

[0045] Wherein, the second mineral oil includes base oil of ExxonMobil product model M220.

[0046] The modified vegetable oil is composed of soybean oil and epoxy fatty acid methyl ester in a weight ratio of 8:1.

[0047] The antioxidant is prepared by compounding diphenylamine, thiodipropionate, phosphite and phenolic antioxidant in a weight ratio of 2.5:2.0:0.8:1.2.

[0048] The thickener is prepared by compounding polyisobutylene, polymethacrylate and polyamide in a weight ratio of 1.5:1.0:0.7.

[0049] The functional additive is prepared by compounding nano-aluminum oxide, nano-boron nitride, graphene and silane coupling agent in a weight ratio of 3.5:2.5:2.0:0.8.

[0050] The present invention also provides a method for preparing mineral heat transfer oil, and the preparation method is implemented with reference to Example 1.

[0051] Example 3

[0052] A method for preparing mineral heat-conducting oil

[0053] The mineral heat transfer oil comprises the following components in parts by weight: 65 parts of base oil, 8 parts of antioxidant, 10 parts of thickener and 17 parts of functional additive.

[0054] The base oil is prepared by using a first mineral oil, a second mineral oil and a modified vegetable oil in a weight ratio of 4:3:1.

[0055] Wherein, the first mineral oil comprises high-purity mineral oil with product model H40X of Shell Company.

[0056] Wherein, the second mineral oil includes base oil of ExxonMobil product model M220.

[0057] The modified vegetable oil is composed of soybean oil and epoxy fatty acid methyl ester in a weight ratio of 6:1.

[0058] The antioxidant is prepared by compounding diphenylamine, thiodipropionate, phosphite and phenolic antioxidant in a weight ratio of 2.5:2.0:0.8:1.2.

[0059] The thickener is prepared by compounding polyisobutylene, polymethacrylate and polyamide in a weight ratio of 1.5:1.0:0.7.

[0060] The functional additive is prepared by compounding nano-aluminum oxide, nano-boron nitride, graphene and silane coupling agent in a weight ratio of 3.5:2.5:2.0:0.8.

[0061] The present invention also provides a method for preparing mineral heat transfer oil, and the preparation method is implemented with reference to Example 1.

[0062] Experimental Example 1

[0063] The heat transfer oils prepared in Examples 1, 2 and 3 of the present invention were used as samples and divided into Example 1 group to Example 3 group, and the control group used mineral heat transfer oil commonly used on the market; the thermal conductivity of the heat transfer oils in Example 1-3 groups and the control group at 100° C. was measured using a thermal conductivity tester, and the data were recorded and compared and analyzed.

[0064] Result analysis: Figure 1 As shown, under the condition of 100° C., the thermal conductivity of the groups of Examples 1-3 are all higher than that of the control group, among which the thermal conductivity of the group of Example 3 is the highest.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0066] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A mineral heat transfer oil, characterized in that: The mineral heat transfer oil comprises the following components in parts by weight: 30-90 parts of base oil, 5-20 parts of antioxidant, 5-15 parts of thickener and 10-30 parts of functional additive.

2. The mineral heat transfer oil according to claim 1, characterized in that: The mineral heat transfer oil comprises the following components in parts by weight: 60-70 parts of base oil, 6-10 parts of antioxidant, 8-12 parts of thickener and 16-18 parts of functional additive.

3. A mineral heat transfer oil according to claim 2, characterized in that: The base oil is prepared by using a first mineral oil, a second mineral oil and a modified vegetable oil in a weight ratio of (40-50):(30-40):(10-20).

4. The mineral heat transfer oil according to claim 3, characterized in that: The first mineral oil includes high-purity mineral oil with product model H40X produced by Shell.

5. The mineral heat transfer oil according to claim 4, characterized in that: The second mineral oil includes a base oil of ExxonMobil product model M220.

6. The mineral heat transfer oil according to claim 5, characterized in that: The modified vegetable oil is composed of soybean oil and epoxy fatty acid methyl ester in a weight ratio of (80-90):(10-20).

7. The mineral heat transfer oil according to claim 6, characterized in that: The antioxidant is prepared by compounding diphenylamine, thiodipropionate, phosphite and phenolic antioxidant in a weight ratio of 2.5:2.0:0.8:1.

2.

8. The mineral heat transfer oil according to claim 7, characterized in that: The thickener is prepared by compounding polyisobutylene, polymethacrylate and polyamide in a weight ratio of 1.5:1.0:0.

7.

9. The mineral heat transfer oil according to claim 8, characterized in that: The functional additive is prepared by compounding nano-aluminum oxide, nano-boron nitride, graphene and a silane coupling agent in a weight ratio of 3.5:2.5:2.0:0.

8.

10. A method for preparing mineral heat transfer oil according to claim 9, characterized in that: The preparation method comprises the following steps: (1) mixing the base oil, antioxidant, thickener and functional additive in a weight ratio to obtain a premix; (2) subjecting the premix to ultrasonic dispersion treatment, followed by vacuum degassing treatment to obtain an intermediate material; (3) subjecting the intermediate material to dynamic stabilization treatment under high temperature and high pressure conditions, cooling it to room temperature and filtering it to obtain the mineral-based heat transfer oil.

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