Method for treating metal surface by ethylene glycol butyl ether after fire

Abstract

The invention discloses a method for treating a metal surface through ethylene glycol butyl ether after a fire disaster. The treatment method comprises the following steps that modified ethylene glycol butyl ether is prepared; sequentially adding modified ethylene glycol butyl ether serving as a main chemical solution into the reaction kettle according to the quantitative percentage, and carrying out mixed reaction; standing the mixed chemical solution in the step S2 for 10-20 minutes, and adding water to dilute the mixed solution according to the remaining percentage of the volume of the reaction kettle; the ethylene glycol butyl ether is modified and serves as a main component of the cleaning solution, the sodium phosphate, the epichlorohydrin, the sodium pyrophosphate and the trichloroethylene are mixed according to a proper proportion, a proper amount of water is added for dilution, and the cleaning solution is obtained. Dirt formed by fire disasters on the metal surface can be effectively removed, and metal objects cannot be damaged.

Description

Technical Field

[0001] This invention relates to the field of ethylene glycol butyl ether cleaning fluid technology, and more specifically to a method for treating metal surfaces with ethylene glycol butyl ether after a fire. Background Technology

[0002] Ethylene glycol butyl ether is a colorless, flammable liquid with a moderate ether odor. Uses include: solvent for coatings, printing inks, stamp pad inks, oils, resins, metal detergents, paint removers, lubricants, automotive engine detergents, dry cleaning solvents, epoxy resin solvents, and pharmaceutical extractants.

[0003] After a fire, metal objects are covered with a layer of impurities. Existing cleaning solutions cannot effectively remove these impurities, and direct physical removal can damage the metal objects. Therefore, we propose a method for treating metal surfaces after a fire using ethylene glycol butyl ether. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the purpose of this invention is to provide a method for treating metal surfaces with ethylene glycol butyl ether after a fire, so as to solve the problems mentioned in the background art.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] This invention provides a method for treating metal surfaces with ethylene glycol butyl ether after a fire, the method comprising the following steps:

[0007] S1. Preparation of modified ethylene glycol butyl ether;

[0008] S2. Modified ethylene glycol butyl ether as the main chemical solution is added to the reaction vessel in a quantitative percentage and mixed for reaction.

[0009] S3. After the chemical solution from S2 has been mixed, let it stand for 10-20 minutes. Then, add water to dilute the mixed solution according to the percentage of the remaining capacity of the reactor.

[0010] S4. When adding water for dilution, stir clockwise at low speed for 5-8 minutes with a glass rod. After the water is added, let it stand for 5-10 minutes to obtain the cleaning solution.

[0011] S5. Use a brush tool to evenly apply the cleaning solution obtained in S4 to the surface of the metal object to be cleaned, and let the cleaning solution react with the surface of the metal object for 5-10 minutes to allow the cleaning solution to fully react with the surface of the metal object.

[0012] S6. After the reaction time is over, use a dry cloth to wipe away the cleaning solution and reaction residue from the surface of the metal object, and wipe the metal surface clean.

[0013] S7. After wiping, place the metal items in the cleaning water tank for cleaning to thoroughly remove the cleaning solution from the surface of the metal items.

[0014] Preferably, the preparation process of modified ethylene glycol butyl ether in step S1 includes the following steps:

[0015] a1. Add butanol and catalyst to the reaction vessel, seal and stir, and heat to the set reaction temperature, then stop heating. Control the reaction pressure to 0.1-0.5 MPa.

[0016] a2. With a molar ratio of butanol to ethylene oxide of 1-5:1, ethylene oxide is continuously introduced into the reactor. After the ethylene oxide is introduced, the reactor is kept warm until the temperature inside the reactor no longer rises and the pressure inside the reactor no longer drops. Then, the reactor is cooled to 55-65°C by cooling water and discharged to obtain modified ethylene glycol butyl ether.

[0017] Preferably, in step a1, the catalyst is a supported potassium fluoride / alumina solid base catalyst, wherein the potassium fluoride loading is 25-45% and the support Al2O3 is 55-75%.

[0018] Preferably, the preparation process of the supported potassium fluoride / alumina solid base catalyst includes the following steps: placing the Al2O3 support in a muffle furnace and calcining it at 400-600℃; dissolving potassium fluoride in ethanol, then adding Al2O3, stirring and impregnating at 50-60℃ for 1-3 hours, then heating to 100℃ to evaporate the ethanol and water, drying the wet sample under vacuum at 100-130℃ for 8-14 hours, and finally calcining it in a muffle furnace at 300-500℃ for 2-6 hours to obtain the supported potassium fluoride / alumina solid base catalyst.

[0019] Preferably, the reaction temperature set in step a1 is 100-130°C, and the amount of catalyst used is 0.4-0.8% of the total mass of the reactants.

[0020] Preferably, in step S1, 6-10% modified ethylene glycol butyl ether, 1-3% sodium phosphate, 2-3% cyclochloropropane, 1-5% sodium pyrophosphate, and 8-12% trichloroethylene are added sequentially in a reaction vessel by mass percentage for reaction.

[0021] Preferably, in step S3, oxygen is introduced into the reaction vessel at a certain flow rate to allow the mixed solution to stand and react for 15 minutes.

[0022] Preferably, in step S4, water is added according to the remaining percentage of the mixed solution to dilute the mixed solution. When diluting the mixed solution, the water should be poured along the inner wall of the reactor while stirring.

[0023] Preferably, in step S5, chemical gloves should be worn, and a tool brush should be used to evenly apply the cleaning solution to the surface of the metal items after the fire, allowing the cleaning solution to fully react with the stains on the metal surface for 5-8 minutes.

[0024] Preferably, in step S7, the wiped metal item is placed in a cleaning water tank and repeatedly lifted and pulled in the tank to dilute and rinse the residual cleaning solution on the surface of the metal item again in the tank. Finally, the metal item is taken out and the water stains on its surface are blown away with an air gun.

[0025] Compared with existing technologies, the present invention has the following advantages:

[0026] This invention modifies ethylene glycol butyl ether and uses it as the main component of a cleaning solution. A cleaning solution is prepared by mixing sodium phosphate, cyclochloropropane, sodium pyrophosphate, and trichloroethylene in appropriate proportions and diluting with an appropriate amount of water. When the user applies the diluted cleaning solution to the surface of metal objects after a fire, it can not only effectively remove the dirt formed by the fire on the metal surface, but also will not damage the metal objects. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] This embodiment of the present invention provides a method for treating metal surfaces with ethylene glycol butyl ether after a fire, the method comprising the following steps:

[0029] S1. Preparation of modified ethylene glycol butyl ether;

[0030] S2. Modified ethylene glycol butyl ether as the main chemical solution is added to the reaction vessel in a quantitative percentage and mixed for reaction.

[0031] S3. After the chemical solution from S2 has been mixed, let it stand for 10-20 minutes. Then, add water to dilute the mixed solution according to the percentage of the remaining capacity of the reactor.

[0032] S4. When adding water for dilution, stir clockwise at low speed for 5-8 minutes with a glass rod. After the water is added, let it stand for 5-10 minutes to obtain the cleaning solution.

[0033] S5. Use a brush tool to evenly apply the cleaning solution obtained in S4 to the surface of the metal object to be cleaned, and let the cleaning solution react with the surface of the metal object for 5-10 minutes to allow the cleaning solution to fully react with the surface of the metal object.

[0034] S6. After the reaction time is over, use a dry cloth to wipe away the cleaning solution and reaction residue from the surface of the metal object, and wipe the metal surface clean.

[0035] S7. After wiping, place the metal items in the cleaning water tank for cleaning to thoroughly remove the cleaning solution from the surface of the metal items.

[0036] The preparation process of modified ethylene glycol butyl ether in step S1 of this embodiment includes the following steps:

[0037] a1. Add butanol and catalyst to the reaction vessel, seal and stir, and heat to the set reaction temperature, then stop heating. Control the reaction pressure to 0.1-0.5 MPa.

[0038] a2. With a molar ratio of butanol to ethylene oxide of 1-5:1, ethylene oxide is continuously introduced into the reactor. After the ethylene oxide is introduced, the reactor is kept warm until the temperature inside the reactor no longer rises and the pressure inside the reactor no longer drops. Then, the reactor is cooled to 55-65°C by cooling water and discharged to obtain modified ethylene glycol butyl ether.

[0039] In step a1 of this embodiment, the catalyst is a supported potassium fluoride / alumina solid base catalyst, wherein the potassium fluoride loading is 25-45% and the support Al2O3 is 55-75%.

[0040] The preparation process of the supported potassium fluoride / alumina solid base catalyst in this embodiment includes the following steps: Al2O3 support is placed in a muffle furnace and calcined at 400-600℃; potassium fluoride is dissolved in ethanol, and then Al2O3 is added, and the mixture is stirred and impregnated at 50-60℃ for 1-3 hours. Then, the mixture is heated to 100℃ to evaporate the ethanol and water. The wet sample is vacuum dried at 100-130℃ for 8-14 hours, and finally placed in a muffle furnace and calcined at 300-500℃ for 2-6 hours to obtain the supported potassium fluoride / alumina solid base catalyst.

[0041] In step a1 of this embodiment, the reaction temperature is set at 100-130°C, and the amount of catalyst used is 0.4-0.8% of the total mass of the reactants.

[0042] In step S1 of this embodiment, 6-10% modified ethylene glycol butyl ether, 1-3% sodium phosphate, 2-3% cyclochloropropane, 1-5% sodium pyrophosphate, and 8-12% trichloroethylene are added sequentially in the reaction vessel according to mass percentage to carry out the reaction.

[0043] In step S3 of this embodiment, oxygen is introduced into the reaction vessel at a certain flow rate to allow the mixed solution to stand and react for 15 minutes.

[0044] In step S4 of this embodiment, water is added according to the remaining percentage of the mixed solution to dilute the mixed solution. When diluting the mixed solution, the water should be poured along the inner wall of the reactor while stirring.

[0045] In step S5 of this embodiment, chemical gloves must be worn, and the cleaning solution must be evenly applied to the surface of the metal items after the fire using a tool brush, allowing the cleaning solution to fully react with the stains on the metal surface for 5-8 minutes.

[0046] In step S7 of this embodiment, the wiped metal item is placed in the cleaning water tank and repeatedly lifted and pulled in the water tank so that the residual cleaning liquid on the surface of the metal item is diluted and rinsed again in the water tank. Finally, the metal item is taken out and the water stains on its surface are blown away by an air gun.

[0047] Example 1.

[0048] This embodiment of the present invention provides a method for treating metal surfaces with ethylene glycol butyl ether after a fire, the method comprising the following steps:

[0049] S1. Preparation of modified ethylene glycol butyl ether;

[0050] S2. Modified ethylene glycol butyl ether as the main chemical solution is added to the reaction vessel in a quantitative percentage and mixed for reaction.

[0051] S3. After the chemical solution from S2 has been mixed, let it stand for 10 minutes. Then, add water to dilute the mixed solution according to the percentage of the remaining capacity of the reactor.

[0052] S4. When adding water for dilution, stir clockwise at low speed for 5 minutes with a glass rod. After the water is added, let it stand for 5 minutes to obtain the cleaning solution.

[0053] S5. Use a brush tool to evenly apply the cleaning solution obtained in S4 to the surface of the metal object to be cleaned, and let the cleaning solution react with the surface of the metal object for 5 minutes to allow the cleaning solution to fully react with the surface of the metal object.

[0054] S6. After the reaction time is over, use a dry cloth to wipe away the cleaning solution and reaction residue from the surface of the metal object, and wipe the metal surface clean.

[0055] S7. After wiping, place the metal items in the cleaning water tank for cleaning to thoroughly remove the cleaning solution from the surface of the metal items.

[0056] The preparation process of modified ethylene glycol butyl ether in step S1 of this embodiment includes the following steps:

[0057] a1. Add butanol and catalyst to the reaction vessel, seal and stir, and heat to the set reaction temperature, then stop heating and control the reaction pressure to 0.1 MPa.

[0058] a2. With a molar ratio of butanol to ethylene oxide of 1:1, ethylene oxide is continuously introduced into the reactor. After the ethylene oxide is introduced, the reactor is kept warm until the temperature inside the reactor no longer rises and the pressure inside the reactor no longer drops. Then, the reactor is cooled to 55°C by cooling water and discharged to obtain modified ethylene glycol butyl ether.

[0059] In step a1 of this embodiment, the catalyst is a supported potassium fluoride / alumina solid base catalyst, wherein the potassium fluoride loading is 25% and the support Al2O3 is 55%.

[0060] The preparation process of the supported potassium fluoride / alumina solid base catalyst in this embodiment includes the following steps: Al2O3 support is placed in a muffle furnace and calcined at 400°C; potassium fluoride is dissolved in ethanol, and then Al2O3 is added, and the mixture is stirred and impregnated at 50°C for 1 hour, then heated to 100°C to evaporate the ethanol and water, the wet sample is vacuum dried at 100°C for 8 hours, and finally placed in a muffle furnace and calcined at 300°C for 2 hours to obtain the supported potassium fluoride / alumina solid base catalyst.

[0061] In step a1 of this embodiment, the reaction temperature is set at 100°C, and the amount of catalyst used is 0.4% of the total mass of the reactants.

[0062] In step S1 of this embodiment, 6% modified ethylene glycol butyl ether, 1% sodium phosphate, 2% cyclochloropropane, 1% sodium pyrophosphate, and 8% trichloroethylene are added sequentially in the reaction vessel according to mass percentage to carry out the reaction.

[0063] In step S3 of this embodiment, oxygen is introduced into the reaction vessel at a certain flow rate to allow the mixed solution to stand and react for 15 minutes.

[0064] In step S4 of this embodiment, water is added according to the remaining percentage of the mixed solution to dilute the mixed solution. When diluting the mixed solution, the water should be poured along the inner wall of the reactor while stirring.

[0065] In step S5 of this embodiment, chemical gloves must be worn, and a cleaning solution must be evenly applied to the surface of the metal items after the fire using a tool brush, allowing the cleaning solution to fully react with the stains on the metal surface for 5 minutes.

[0066] In step S7 of this embodiment, the wiped metal item is placed in the cleaning water tank and repeatedly lifted and pulled in the water tank so that the residual cleaning liquid on the surface of the metal item is diluted and rinsed again in the water tank. Finally, the metal item is taken out and the water stains on its surface are blown away by an air gun.

[0067] Example 2.

[0068] This embodiment of the present invention provides a method for treating metal surfaces with ethylene glycol butyl ether after a fire, the method comprising the following steps:

[0069] S1. Preparation of modified ethylene glycol butyl ether;

[0070] S2. Modified ethylene glycol butyl ether as the main chemical solution is added to the reaction vessel in a quantitative percentage and mixed for reaction.

[0071] S3. After the chemical solution from S2 has been mixed and allowed to stand for 20 minutes, add water to dilute the mixed solution according to the percentage of the remaining capacity of the reactor.

[0072] S4. When adding water for dilution, stir clockwise at low speed for 8 minutes with a glass rod. After the water is added, let it stand for 10 minutes to obtain the cleaning solution.

[0073] S5. Use a brush tool to evenly apply the cleaning solution obtained in S4 to the surface of the metal item to be cleaned, and let the cleaning solution react with the surface of the metal item for 10 minutes to allow the cleaning solution to fully react with the surface of the metal item.

[0074] S6. After the reaction time is over, use a dry cloth to wipe away the cleaning solution and reaction residue from the surface of the metal object, and wipe the metal surface clean.

[0075] S7. After wiping, place the metal items in the cleaning water tank for cleaning to thoroughly remove the cleaning solution from the surface of the metal items.

[0076] The preparation process of modified ethylene glycol butyl ether in step S1 of this embodiment includes the following steps:

[0077] a1. Add butanol and catalyst to the reaction vessel, seal and stir, and heat to the set reaction temperature, then stop heating and control the reaction pressure to 0.5 MPa.

[0078] a2. With a molar ratio of butanol to ethylene oxide of 5:1, ethylene oxide is continuously introduced into the reactor. After the ethylene oxide is introduced, the reactor is kept warm until the temperature inside the reactor no longer rises and the pressure inside the reactor no longer drops. Then, the reactor is cooled to 65°C by cooling water and discharged to obtain modified ethylene glycol butyl ether.

[0079] In step a1 of this embodiment, the catalyst is a supported potassium fluoride / alumina solid base catalyst, wherein the potassium fluoride loading is 45% and the support Al2O3 is 75%.

[0080] The preparation process of the supported potassium fluoride / alumina solid base catalyst in this embodiment includes the following steps: Al2O3 support is placed in a muffle furnace and calcined at 600°C; potassium fluoride is dissolved in ethanol, and then Al2O3 is added, and the mixture is stirred and impregnated at 50-60°C for 3 hours, then heated to 100°C to evaporate the ethanol and water, the wet sample is vacuum dried at 130°C for 14 hours, and finally placed in a muffle furnace and calcined at 500°C for 6 hours to obtain the supported potassium fluoride / alumina solid base catalyst.

[0081] In step a1 of this embodiment, the reaction temperature is set at 100-130°C, and the amount of catalyst used is 0.8% of the total mass of the reactants.

[0082] In step S1 of this embodiment, 10% modified ethylene glycol butyl ether, 3% sodium phosphate, 3% cyclochloropropane, 5% sodium pyrophosphate, and 12% trichloroethylene are added sequentially in the reaction vessel according to mass percentage to carry out the reaction.

[0083] In step S3 of this embodiment, oxygen is introduced into the reaction vessel at a certain flow rate to allow the mixed solution to stand and react for 15 minutes.

[0084] In step S4 of this embodiment, water is added according to the remaining percentage of the mixed solution to dilute the mixed solution. When diluting the mixed solution, the water should be poured along the inner wall of the reactor while stirring.

[0085] In step S5 of this embodiment, chemical gloves must be worn, and the cleaning solution must be evenly applied to the surface of the metal items after the fire using a tool brush, so that the cleaning solution can fully react with the stains on the metal surface for 8 minutes.

[0086] In step S7 of this embodiment, the wiped metal item is placed in the cleaning water tank and repeatedly lifted and pulled in the water tank so that the residual cleaning liquid on the surface of the metal item is diluted and rinsed again in the water tank. Finally, the metal item is taken out and the water stains on its surface are blown away by an air gun.

[0087] Example 3.

[0088] This embodiment of the present invention provides a method for treating metal surfaces with ethylene glycol butyl ether after a fire, the method comprising the following steps:

[0089] S1. Preparation of modified ethylene glycol butyl ether;

[0090] S2. Modified ethylene glycol butyl ether as the main chemical solution is added to the reaction vessel in a quantitative percentage and mixed for reaction.

[0091] S3. After the chemical solution from S2 has been mixed, let it stand for 15 minutes. Then, add water to dilute the mixed solution according to the percentage of the remaining capacity of the reactor.

[0092] S4. When adding water for dilution, stir clockwise at low speed for 7 minutes with a glass rod. After the water is added, let it stand for 8 minutes to obtain the cleaning solution.

[0093] S5. Use a brush tool to evenly apply the cleaning solution obtained in S4 to the surface of the metal item to be cleaned, and let the cleaning solution react with the surface of the metal item for 8 minutes to allow the cleaning solution to fully react with the surface of the metal item.

[0094] S6. After the reaction time is over, use a dry cloth to wipe away the cleaning solution and reaction residue from the surface of the metal object, and wipe the metal surface clean.

[0095] S7. After wiping, place the metal items in the cleaning water tank for cleaning to thoroughly remove the cleaning solution from the surface of the metal items.

[0096] The preparation process of modified ethylene glycol butyl ether in step S1 of this embodiment includes the following steps:

[0097] a1. Add butanol and catalyst to the reaction vessel, seal and stir, and heat to the set reaction temperature, then stop heating and control the reaction pressure to 0.3 MPa.

[0098] a2. With a molar ratio of butanol to ethylene oxide of 3:1, ethylene oxide is continuously introduced into the reactor. After the ethylene oxide is introduced, the reactor is kept warm until the temperature inside the reactor no longer rises and the pressure inside the reactor no longer drops. Then, the reactor is cooled to 60°C by cooling water and discharged to obtain modified ethylene glycol butyl ether.

[0099] In step a1 of this embodiment, the catalyst is a supported potassium fluoride / alumina solid base catalyst, wherein the potassium fluoride loading is 35% and the support Al2O3 is 65%.

[0100] The preparation process of the supported potassium fluoride / alumina solid base catalyst in this embodiment includes the following steps: Al2O3 support is placed in a muffle furnace and calcined at 500°C; potassium fluoride is dissolved in ethanol, and then Al2O3 is added, and the mixture is stirred and impregnated at 55°C for 2 hours. Subsequently, the mixture is heated to 100°C to evaporate the ethanol and water, and the wet sample is vacuum dried at 115°C for 11 hours. Finally, the sample is placed in a muffle furnace and calcined at 400°C for 4 hours to obtain the supported potassium fluoride / alumina solid base catalyst.

[0101] In step a1 of this embodiment, the reaction temperature is set at 115°C, and the amount of catalyst used is 0.6% of the total mass of the reactants.

[0102] In step S1 of this embodiment, 8% modified ethylene glycol butyl ether, 2% sodium phosphate, 2.5% cyclochloropropane, 3% sodium pyrophosphate, and 10% trichloroethylene are added sequentially in the reaction vessel according to mass percentage to carry out the reaction.

[0103] In step S3 of this embodiment, oxygen is introduced into the reaction vessel at a certain flow rate to allow the mixed solution to stand and react for 15 minutes.

[0104] In step S4 of this embodiment, water is added according to the remaining percentage of the mixed solution to dilute the mixed solution. When diluting the mixed solution, the water should be poured along the inner wall of the reactor while stirring.

[0105] In step S5 of this embodiment, chemical gloves must be worn, and a cleaning solution must be evenly applied to the surface of the metal items after the fire using a tool brush, allowing the cleaning solution to fully react with the stains on the metal surface for 6 minutes.

[0106] In step S7 of this embodiment, the wiped metal item is placed in the cleaning water tank and repeatedly lifted and pulled in the water tank so that the residual cleaning liquid on the surface of the metal item is diluted and rinsed again in the water tank. Finally, the metal item is taken out and the water stains on its surface are blown away by an air gun.

[0107] Comparative Example 1.

[0108] Unlike Example 3, ethylene glycol butyl ether was not modified.

[0109] Comparative Example 2.

[0110] Unlike Example 3, sodium pyrophosphate was not added in step S1.

[0111] Comparative Example 3.

[0112] Unlike Example 3, oxygen was not introduced into the mixed chemical solution during the standing process in step S3.

[0113] The treatment methods of Examples 1-3 and Comparative Examples 1-3 were tested;

[0114] Performance testing

[0115] Six metal samples, all identical in material and size (10*10*5cm), were selected after the fire. The cleaning solutions prepared in Examples 1-3 and Comparative Examples 1-3 were poured into glass containers. The six metal samples were then placed in their respective containers. The tester, wearing chemical gloves, used a brush to apply the cleaning solution evenly to the surface of each metal sample, allowing it to react for 8 minutes. After the reaction, the surface was wiped clean. The wiped metal samples were then placed in a cleaning water tank and repeatedly lifted and lowered within the tank to dilute and rinse away any remaining cleaning solution. Finally, the metal samples were removed and the surface water was blown away with an air gun. The six metal samples were then placed on a table and observed using a 5x microscope. The observation data are shown in the table below.

[0116] Dirt removal rate (%) Does it damage the metal surface? Example 1 97.5 no Example 2 98.2 no Example 3 98.7 no Comparative Example 1 64.3 have Comparative Example 2 86.5 slight Comparative Example 3 92.4 slight

[0117] As can be seen from the table above, the method of treating metal surfaces after a fire using ethylene glycol butyl ether of the present invention, by modifying ethylene glycol butyl ether and supplementing it with a reasonable treatment method, can effectively remove dirt from the metal surface, with a removal rate of up to 98.7%. Compared with comparative examples 1-3, its treatment effect is significant, while causing no damage to the metal surface.

[0118] The innovation of this invention lies in:

[0119] This invention modifies ethylene glycol butyl ether and uses it as the main component of a cleaning solution. A cleaning solution is prepared by mixing sodium phosphate, cyclochloropropane, sodium pyrophosphate, and trichloroethylene in appropriate proportions and diluting with an appropriate amount of water. When the user applies the diluted cleaning solution to the surface of metal objects after a fire, it can not only effectively remove the dirt formed by the fire on the metal surface, but also will not damage the metal objects.

[0120] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0121] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for treating metal surfaces after a fire using ethylene glycol butyl ether, characterized in that, The processing method includes the following steps: S1. Preparation of modified ethylene glycol butyl ether; S2. Modified ethylene glycol butyl ether as the main chemical solution is added to the reaction vessel in a quantitative percentage and mixed for reaction. S3. After the chemical solution from S2 has been mixed, let it stand for 10-20 minutes. Then, add water to dilute the mixed solution according to the percentage of the remaining capacity of the reactor. S4. When adding water for dilution, stir clockwise at low speed for 5-8 minutes with a glass rod. After the water is added, let it stand for 5-10 minutes to obtain the cleaning solution. S5. Use a brush tool to evenly apply the cleaning solution obtained in S4 to the surface of the metal object to be cleaned, and let the cleaning solution react with the surface of the metal object for 5-10 minutes to allow the cleaning solution to fully react with the surface of the metal object. S6. After the reaction time is over, use a dry cloth to wipe away the cleaning solution and reaction residue from the surface of the metal object, and wipe the metal surface clean. S7. After wiping, place the metal items in the cleaning water tank for cleaning to thoroughly remove the cleaning solution from the surface of the metal items.

2. The method for treating metal surfaces after a fire using ethylene glycol butyl ether according to claim 1, characterized in that, The preparation process of modified ethylene glycol butyl ether in step S1 includes the following steps: a1. Add butanol and catalyst to the reaction vessel, seal and stir, and heat to the set reaction temperature, then stop heating. Control the reaction pressure to 0.1-0.5 MPa. a2. With a molar ratio of butanol to ethylene oxide of 1-5:1, ethylene oxide is continuously introduced into the reactor. After the ethylene oxide is introduced, the reactor is kept warm until the temperature inside the reactor no longer rises and the pressure inside the reactor no longer drops. Then, the reactor is cooled to 55-65°C by cooling water and discharged to obtain modified ethylene glycol butyl ether.

3. The method for treating metal surfaces after a fire using ethylene glycol butyl ether according to claim 2, characterized in that, In step a1, the catalyst is a supported potassium fluoride / alumina solid base catalyst, wherein the potassium fluoride loading is 25-45% and the support Al2O3 is 55-75%.

4. The method for treating metal surfaces after a fire using ethylene glycol butyl ether according to claim 3, characterized in that, The preparation process of the supported potassium fluoride / alumina solid base catalyst includes the following steps: Al2O3 support is placed in a muffle furnace and calcined at 400-600℃; potassium fluoride is dissolved in ethanol, and then Al2O3 is added, and the mixture is stirred and impregnated at 50-60℃ for 1-3 hours. Subsequently, the mixture is heated to 100℃ to evaporate the ethanol and water, and the wet sample is vacuum dried at 100-130℃ for 8-14 hours. Finally, the sample is placed in a muffle furnace and calcined at 300-500℃ for 2-6 hours to obtain the supported potassium fluoride / alumina solid base catalyst.

5. The method for treating metal surfaces after a fire using ethylene glycol butyl ether according to claim 2, characterized in that, The reaction temperature set in step a1 is 100-130℃, and the amount of catalyst used is 0.4-0.8% of the total mass of the reactants.

6. The method for treating metal surfaces after a fire using ethylene glycol butyl ether according to claim 1, characterized in that, In step S1, 6-10% modified ethylene glycol butyl ether, 1-3% sodium phosphate, 2-3% cyclochloropropane, 1-5% sodium pyrophosphate, and 8-12% trichloroethylene are added sequentially in the reaction vessel according to mass percentage to carry out the reaction.

7. The method for treating metal surfaces after a fire using ethylene glycol butyl ether according to claim 1, characterized in that, In step S3, oxygen is introduced into the reaction vessel at a certain flow rate to allow the mixed solution to stand and react for 15 minutes.

8. The method for treating metal surfaces after a fire using ethylene glycol butyl ether according to claim 1, characterized in that, In step S4, water is added according to the remaining percentage of the mixed solution to dilute the mixed solution. When diluting the mixed solution, the water should be poured along the inner wall of the reactor while stirring.

9. The method for treating metal surfaces after a fire using ethylene glycol butyl ether according to claim 1, characterized in that, In step S5, chemical gloves must be worn, and the cleaning solution should be evenly applied to the surface of the metal items after the fire using a tool brush, allowing the cleaning solution to fully react with the stains on the metal surface for 5-8 minutes.

10. The method for treating metal surfaces after a fire using ethylene glycol butyl ether according to claim 1, characterized in that, In step S7, the wiped metal item is placed in a cleaning water tank and repeatedly lifted and pulled in the tank to dilute and rinse the residual cleaning solution on the surface of the metal item again. Finally, the metal item is taken out and the water stains on its surface are blown away with an air gun.