Preparation method and application of corrosion-resistant perfluorocyclohexanone extinguishing agent
By adding a corrosion inhibitor to perfluorohexanone fire extinguishing agent to generate a non-acidic product, the corrosion problem caused by the reaction with water during the storage of perfluorohexanone fire extinguishing agent was solved, and the corrosion resistance and stability were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUHAN TRIFLUORO NEW MATERIAL TECH CO LTD
- Filing Date
- 2024-01-29
- Publication Date
- 2026-07-21
Smart Images
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Abstract
Description
Technical Field
[0001] This application relates to the field of fire protection technology, and in particular to a method for preparing a corrosion-resistant perfluorohexanone fire extinguishing agent and its application. Background Technology
[0002] Fire extinguishing agents are commonly used equipment and materials in the fire protection field. There are many types of fire extinguishing agents, which can be divided into water-based fire extinguishing agents, dry powder fire extinguishing agents, foam fire extinguishing agents, etc. Among them, water-based fire extinguishing agents mainly achieve the effect of extinguishing fires through the cooling effect of water. However, since warehouse fire-fighting water is generally taken from nature and contains certain impurities, it has a certain conductivity. The more electrolytes the water contains, the greater its conductivity. Therefore, water-based fire extinguishing agents are generally not suitable for extinguishing electrical fires.
[0003] Halon fire extinguishing agents, represented by halogenated hydrocarbons, are a class of highly effective extinguishing agents for electrical fires. They extinguish fires primarily by inhibiting the chemical reaction process of combustion, thus interrupting combustion. Halogenated hydrocarbon fire extinguishing agents are characterized by high extinguishing efficiency, rapid extinguishing, low dosage, strong vaporization, good thermal and chemical stability, no pollution to the environment or equipment, and no deterioration during long-term storage. However, due to their depletion of the ozone layer, halogenated hydrocarbon fire extinguishing agents are gradually being phased out.
[0004] Among numerous alternative halogenated hydrocarbon fire extinguishing agents, perfluorohexanone (PFH) is widely used in firefighting operations in many important locations due to its high fire extinguishing efficiency, ozone inactivity (ODP = 0), global warming potential (GWP) of only 1, residual toxicity ≥ 66%, and non-conductive properties. However, despite its excellent fire extinguishing performance, PPH can react with water in the environment during storage to produce strong acidic substances, which can corrode storage containers and, in severe cases, cause container rupture and leaks.
[0005] In view of this, it is necessary to design an improved method for preparing and applying a corrosion-resistant perfluorohexanone fire extinguishing agent to solve the above problems.
[0006] Application content
[0007] The purpose of this application is to provide a method for preparing a corrosion-resistant perfluorohexanone fire extinguishing agent and its application.
[0008] To achieve the above-mentioned objectives, in a first aspect, this application provides a corrosion-resistant perfluorohexanone fire extinguishing agent, comprising 0.01-1% by mass of a corrosion-resistant inhibitor, with the balance being perfluorohexanone;
[0009] The corrosion inhibitor is one or more of dimethyldimethoxysilane, triethyl orthoformate, perfluorotriethylamine, perfluorotripropylamine, nonafluorobutyl methyl ether, and hexafluoropropyl methyl ether.
[0010] In one embodiment of the present invention, the corrosion inhibitor is dimethyldimethoxysilane, and the mass percentage of the dimethyldimethoxysilane is 0.5-0.8%.
[0011] In one embodiment of the present invention, the corrosion inhibitor further includes triethyl orthoformate, wherein the mass percentage of triethyl orthoformate is 0-0.1%.
[0012] In one embodiment of the present invention, the corrosion inhibitor further includes perfluorotriethylamine, wherein the mass percentage of perfluorotriethylamine is 0-0.2%.
[0013] Secondly, the present invention also provides a method for preparing a corrosion-resistant perfluorohexanone fire extinguishing agent, comprising the following steps:
[0014] The corrosion-resistant inhibitor is mixed evenly with perfluorohexanone to obtain the corrosion-resistant perfluorohexanone fire extinguishing agent.
[0015] Thirdly, the corrosion-resistant perfluorohexanone fire extinguishing agent proposed in this invention can be used to prepare fire extinguishers.
[0016] As one embodiment of the present invention, the fire extinguisher includes a corrosion-resistant perfluorohexanone fire extinguishing agent.
[0017] The beneficial effects of this application are:
[0018] The corrosion-resistant perfluorohexanone fire extinguishing agent provided in this application possesses excellent corrosion resistance by adding a small amount (0.01-1% by mass) of corrosion inhibitor to perfluorohexanone. This corrosion inhibitor's anti-corrosion properties are utilized to impart excellent corrosion resistance to the fire extinguishing agent. By controlling the source and amount of the corrosion inhibitor, good compatibility with perfluorohexanone can be ensured. Furthermore, in the presence of water in the fire extinguishing agent, the corrosion inhibitor can chemically react with water to generate non-acidic products compatible with perfluorohexanone. Under these two effects, corrosion resistance can be imparted to the perfluorohexanone fire extinguishing agent without affecting its stability and practical performance, preventing the release of acidic substances from the perfluorohexanone fire extinguishing agent during storage due to reaction with water in the environment, thus avoiding corrosion of the storage container. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this application clearer, the application will be described in detail below with reference to specific embodiments.
[0020] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0021] On the one hand, this application provides a corrosion-resistant perfluorohexanone fire extinguishing agent, which includes a corrosion-resistant inhibitor and perfluorohexanone, wherein the mass percentage of the corrosion-resistant inhibitor is 0.01-1%, and the balance is perfluorohexanone.
[0022] In one embodiment of the present invention, the corrosion inhibitor is one or more of dimethyldimethoxysilane, triethyl orthoformate, perfluorotriethylamine, perfluorotripropylamine, nonafluorobutyl methyl ether, and hexafluoropropyl methyl ether; preferably, one or more of dimethyldimethoxysilane, triethyl orthoformate, and perfluorotriethylamine. When the above three substances are used as corrosion inhibitors, the mass percentage of dimethyldimethoxysilane is 0.5-0.8%, the mass percentage of triethyl orthoformate is 0-0.1%, and the mass percentage of perfluorotriethylamine is 0-0.2%.
[0023] In the above technical solution, by selecting the aforementioned substances as corrosion inhibitors and preparing the extinguishing agent together with perfluorohexanone, and by controlling the amount of each substance added, the impact of the addition of corrosion inhibitors on the fire extinguishing performance of perfluorohexanone itself is reduced. Simultaneously, an appropriate amount of corrosion inhibitors can promote good compatibility with perfluorohexanone, resulting in good stability of the extinguishing agent and thus not affecting its performance. Secondly, the introduction of corrosion inhibitors endows the extinguishing agent with water removal capabilities. When water is present in the extinguishing agent, the chemical reaction between the corrosion inhibitor and water molecules can remove the water, preventing the acidic substances released by the perfluorohexanone extinguishing agent during storage from corroding the storage container, effectively extending the service life of the perfluorohexanone extinguishing agent storage container. Furthermore, the corrosion inhibitors react with water molecules or H+... + The products of the chemical reaction are also highly compatible with perfluorohexanone, and therefore will not affect the performance of the fire extinguishing agent.
[0024] On the other hand, the present invention also provides a method for preparing the above-mentioned corrosion-resistant perfluorohexanone fire extinguishing agent. The specific preparation steps are as follows: add a corrosion inhibitor with a mass fraction of 0.01-1.00% to perfluorohexanone, mix evenly, and the corrosion-resistant perfluorohexanone fire extinguishing agent is obtained.
[0025] In particular, the present invention also provides the application of the above-mentioned corrosion-resistant perfluorohexanone fire extinguishing agent in the preparation of fire extinguishers.
[0026] As one embodiment of the present invention, the fire extinguisher includes the above-mentioned corrosion-resistant perfluorohexanone fire extinguishing agent.
[0027] The preparation method and application of the corrosion-resistant perfluorohexanone fire extinguishing agent proposed in this invention will be further explained below with reference to specific embodiments:
[0028] Example 1
[0029] This embodiment prepares a corrosion-resistant perfluorohexanone fire extinguishing agent. The specific preparation method is as follows: 0.8% by mass of dimethyldimethoxysilane and 99.2% by mass of perfluorohexanone are mixed to obtain the corrosion-resistant perfluorohexanone fire extinguishing agent.
[0030] To investigate the corrosion resistance of the fire extinguishing agent prepared in this embodiment, Q235 (ordinary carbon structural steel) and Q345 (low-alloy high-strength structural steel) metal steel sheets were used to simulate the pressure-resistant steel cylinders storing fluorine-containing fire extinguishing agents to test the corrosion resistance of the fire extinguishing agent. Before the test, the Q235 and Q345 metal steel sheets with dimensions of 50mm×25mm×2mm were ground and polished, then cleaned and dried, and the mass of the metal steel sheet specimens was weighed and recorded. Then, the test was carried out in the following manner: the Q235 and Q345 metal steel sheets were placed on the cleaned and dried... The extinguishing agent prepared in Example 1 was injected into the immersion containers, and an appropriate amount of water was added to simulate the storage environment of the extinguishing agent storage container. The containers were then sealed, and after confirming a good seal, the entire container was placed in the test chamber, and the test was started. The immersion time for the samples was 30 days, and the test chamber temperature was 40°C. No leakage or volatilization was observed during the test. After the test, the metal steel sheet samples were removed for observation. The resulting rust was treated, and the mass of the samples was measured. The corrosion rate of the samples was calculated based on the change in mass, surface area, and immersion time. To better evaluate the performance of the extinguishing agent prepared in Example 1, the corrosion resistance of traditional perfluorohexanone extinguishing agents was tested under the same conditions. The corrosion resistance test results of the fire extinguishing agent prepared in Example 1 at different water contents are shown in Table 1. In the table, corrosion resistance % = (corrosion rate of traditional perfluorohexanone - corrosion rate of corrosion-resistant fire extinguishing agent) ÷ corrosion rate of traditional perfluorohexanone × 100%. Water content specifically refers to the percentage of the mass of water in contact with the fire extinguishing agent to the mass of the fire extinguishing agent. The mechanism by which the fire extinguishing agent prepared in this example can remove water is shown in the following chemical reaction formula: water removal is achieved through the chemical reaction between the active groups in dimethyldimethoxysilane and water molecules.
[0031]
[0032] Chemical reaction formula of dimethyldimethoxysilane with water molecules
[0033] Table 1. Corrosion resistance test results of the fire extinguishing agent prepared in Example 1 at different water contents.
[0034]
[0035] Example 2
[0036] This embodiment prepared a corrosion-resistant perfluorohexanone fire extinguishing agent. The specific preparation method was as follows: 0.8% by mass of dimethyldimethoxysilane, 0.1% by mass of perfluorotriethylamine, and 99.1% by mass of perfluorohexanone were mixed to obtain the corrosion-resistant perfluorohexanone fire extinguishing agent. The corrosion resistance of the fire extinguishing agent prepared in this embodiment was tested using the test method of Example 1, and the results are shown in Table 2. Comparing the test results in Table 1 and Table 2, it can be seen that when perfluorotriethylamine and dimethyldimethoxysilane are added simultaneously, since both can react with water in the fire extinguishing agent, it exhibits better corrosion resistance than in Example 1.
[0037] Table 2 shows the corrosion resistance results of the fire extinguishing agent prepared in Example 2.
[0038]
[0039] Example 3
[0040] This embodiment prepared a corrosion-resistant perfluorohexanone fire extinguishing agent. The specific preparation method was as follows: 0.6% by mass of dimethyldimethoxysilane, 0.1% by mass of perfluorotriethylamine, and 0.1% by mass of triethyl orthoformate were mixed with 99.2% by mass of perfluorohexanone to obtain the corrosion-resistant perfluorohexanone fire extinguishing agent. The corrosion resistance of the fire extinguishing agent prepared in this embodiment was tested using the test method of Example 1, and the results are shown in Table 3. Comparing the test results in Table 3 and Table 1, it can be seen that when the amount of corrosion inhibitor added is constant, the fire extinguishing agent prepared by adding multiple corrosion inhibitors (Example 3) has better overall performance than the fire extinguishing agent prepared by using a single corrosion inhibitor (Example 1). This is because the added corrosion inhibitors, perfluorotriethylamine and triethyl orthoformate, have stronger reactivity with water and are more likely to consume water, thereby inhibiting the reaction between perfluorohexanone and water. Therefore, the fire extinguishing agent prepared in Example 3 exhibits superior corrosion resistance compared to Example 1.
[0041] Table 3 shows the corrosion resistance results of the fire extinguishing agent prepared in Example 3.
[0042]
[0043] Example 4
[0044] This embodiment prepared a corrosion-resistant perfluorohexanone fire extinguishing agent. The specific preparation method was as follows: 0.5% by mass of dimethyldimethoxysilane, 0.1% by mass of perfluorotriethylamine, and 0.2% by mass of triethyl orthoformate were mixed with 99.2% by mass of perfluorohexanone to obtain the corrosion-resistant perfluorohexanone fire extinguishing agent. The corrosion resistance of the fire extinguishing agent prepared in this embodiment was tested using the test method of Example 1, and the results are shown in Table 4. Comparing the test results in Table 4 and Table 3, it can be seen that when the amount of corrosion inhibitor added is constant, the overall performance of the fire extinguishing agent prepared in Example 4 is better than that in Example 3. This is because the added corrosion inhibitor, triethyl orthoformate, has a stronger reaction activity with water than perfluorotriethylamine, and more easily consumes water, thereby inhibiting the reaction between perfluorohexanone and water and reducing the formation of acidic substances.
[0045] Table 4 shows the corrosion resistance results of the fire extinguishing agent prepared in Example 4.
[0046]
[0047] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.
Claims
1. A corrosion-resistant perfluorohexanone fire extinguishing agent, characterized in that, Includes corrosion inhibitors and 99.2% perfluorohexanone; The corrosion inhibitor is a mixture of 0.5% by mass of dimethyldimethoxysilane, 0.1% by mass of perfluorotriethylamine, and 0.2% by mass of triethyl orthoformate.
2. A method for preparing a corrosion-resistant perfluorohexanone fire extinguishing agent, characterized in that, Includes the following steps: The corrosion-resistant inhibitor described in claim 1 is mixed evenly with perfluorohexanone to obtain the corrosion-resistant perfluorohexanone fire extinguishing agent.
3. Application of a corrosion-resistant perfluorohexanone extinguishing agent in the preparation of fire extinguishers.
4. A fire extinguisher, characterized in that, This includes corrosion-resistant perfluorohexanone fire extinguishing agents.