Floating-oil-free and adhesion-free metal degreasing agent

Abstract

The invention relates to a non-floating oil and non-adhesion metal degreasing agent, and relates to the technical field of degreasing agent preparation, the non-floating oil and non-adhesion metal degreasing agent comprises the following concentration components: 1-6 g / L of sodium citrate, 2-7 g / L of sodium metasilicate pentahydrate, 1-7 g / L of disodium ethylene diamine tetraacetate, 1-5 g / L of sodium gluconate, 1-10 g / L of sodium hydroxide and 4.5-53 g / L of anionic nonionic surfactant, disodium ethylene diamine tetraacetate is used for complexing heavy metal ions in water, so that other components are not influenced by the metal ions, and the anionic and nonionic surfactant is used for enhancing the emulsification effect of oily substances and water; the metal shielding performance of the ethylene diamine tetraacetic acid and the high emulsifying performance of the anionic and nonionic surfactant are utilized, so that the cleaning and oil removing capacity of the oil removing agent is improved.

Description

Technical Field

[0001] The present application relates to the technical field of degreasing cleaning agents, and in particular to a non-floating oil and non-adhesive metal degreasing agent that can be used on metal surfaces to efficiently emulsify oil stains and prevent the oil stains from floating or remaining. Background Art

[0002] As the industrial manufacturing industry becomes more and more perfect and develops towards high, precise, advanced and quality, the requirements for metal cleaning processes in the cleaning industry are also getting higher and higher. The original solvent cleaning such as petroleum and kerosene, which initially caused energy waste and environmental pollution, has transitioned to semi-solvent cleaning, and then to alkaline cleaning and acid cleaning agents such as water cleaning. Although the cleaning agents used are becoming more and more environmentally friendly, the oil removal performance is lower than that of solvent cleaning.

[0003] The invention patent application publication number CN105623928A discloses a fitness equipment suction cup cleaner, which is made of the following raw materials in parts by weight: 55-60 parts of sodium bentonite, 15-20 parts of sepiolite powder, 15-20 parts of hemp stalk ash, 10-15 parts of pig hair ash, 10-15 parts of fern root powder, 10-15 parts of nano talc, 8-12 parts of glycerol, 8-12 parts of stearic acid, 6-10 parts of alkyl glycoside, and ethylenediaminetetraacetic acid diacetate. 5-8 parts of sodium, 5-8 parts of tea seed powder, 3-6 parts of triethanolamine, 2-3 parts of baking soda, 1-2 parts of nano alumina, 1-2 parts of citric acid, 20-25 parts of palm oil, 80-100 parts of ethanol, and 400-500 parts of water; the cleaning agent of this application can effectively clean stains and dust on the metal surface and prevent the metal from rusting and corrosion, but the degreasing effect is poor. When there is too much oily substance on the metal surface, the cleaning effect is poor. Summary of the invention

[0004] In order to solve the problem of poor degreasing effect of detergents, the present application provides a metal degreasing agent without floating oil and adhesion, which can effectively promote the emulsification of a mixture of oil and water, thereby effectively removing oil.

[0005] In the first aspect, the present application provides a non-floating oil and non-adhesive metal degreasing agent using the following technical solution: A non-floating oil and non-adhesive metal degreasing agent comprises the following concentration components: 1-6 g / L sodium citrate, 2-7 g / L sodium metasilicate pentahydrate, 1-7 g / L disodium ethylenediaminetetraacetic acid, 1-5 g / L sodium gluconate, 1-10 g / L sodium hydroxide and 4.5-53 g / L anionic nonionic surfactant, wherein the disodium ethylenediaminetetraacetic acid is used for complexing heavy metal ions in water so that other components are not affected by the metal ions, and the anionic nonionic surfactant is used for enhancing the emulsification of oily substances and water.

[0006] By adopting the above technical solution, sodium citrate in the cleaning agent mainly plays the role of removing dirt and stains. It can neutralize calcium and magnesium ions to dissolve calcium and magnesium salts in solid stains, thereby achieving the purpose of cleaning calcium and magnesium salt stains on metal surfaces. Sodium citrate is environmentally friendly and pollution-free, has little corrosion to metals, and will not corrode metals when cleaning them, making it suitable as a metal cleaner. Sodium metasilicate pentahydrate can reduce the surface tension of water and oily substances through its strong wettability, change the interface state of the two, thereby emulsifying the oily substances and water, so that the oily substances can be washed and cleaned by water flow, thereby achieving the purpose of degreasing. However, the emulsification effect of sodium metasilicate pentahydrate mainly comes from hydrophilic groups and hydrophobic groups. When there are too many oily substances, the emulsification performance becomes weak. Sodium hydroxide, as a strong alkaline substance, can neutralize various acidic dirt and stains, and sodium hydroxide can also provide the alkaline conditions required for various substances in the degreasing agent to function, so that the degreasing agent can better exert its degreasing performance. Sodium gluconate, as an antioxidant, can keep various substances in the degreasing agent from being affected by oxidation in the air, which can not only maintain the degreasing function of each component, but also keep the color of the degreasing agent unchanged. Disodium ethylenediaminetetraacetic acid can form stable complexes with heavy metal ions such as manganese, iron, and magnesium, and combine heavy metal ions in water to prevent them from reacting with other substances in the degreasing agent and causing adverse effects. Since the degreasing agent targets the metal surface, it will slightly corrode the metal during the cleaning process when removing rust or slightly corroding the metal during the cleaning process, forming heavy metal ions mixed into the cleaning system composed of the degreasing agent and water. The heavy metal ions react with various surfactants that promote the emulsification process of oily substances, thereby reducing the emulsification performance of the degreasing agent, resulting in the oily substances being difficult to remove, or being removed from the metal surface but difficult to form emulsification, and can only float on the water surface, and will still remain on the metal surface after rinsing. Therefore, through the metal masking function of disodium ethylenediaminetetraacetic acid, the heavy metal ions that enter the cleaning system during the cleaning process can be complexed and fixed, thereby enhancing the degreasing performance of the degreasing agent and improving the degreasing effect; Surfactants can reduce the interfacial tension between oil and water by reducing surface tension and wetting, thereby destroying the interfacial state of oil and water, causing the oil and water to disperse with each other and form an emulsification effect. However, the formation of emulsification depends not only on the degree of dispersion between oil and water, but also on whether the oil-water dispersion can maintain the dispersed state. The level of interfacial tension only indicates the difficulty of forming emulsification, and whether the emulsification degree can be maintained depends on other factors. Anionic nonionic surfactants can increase the thickening ability of degreasing agents. When the viscosity of the oil-water mixture increases, it is more conducive to maintaining the emulsified state, so that the oil can remain mixed with water and will not float on the surface of the oil-water mixture, resulting in unclean cleaning. In addition, anionic nonionic surfactants have better stability and will not be affected by positively charged metal ions. They have better stability, thereby maintaining the emulsified state. By adding anionic nonionic surfactants, the degreasing agent has efficient oil removal performance.

[0007] Optionally, the anionic nonionic surfactant includes the following concentration components: triethanolamine oleic acid soap 1-15g / L, alcohol ether optimized surfactant 0.5-8g / L, oleyl alcohol lipid surface substance 1-10g / L, fatty alcohol polyvinyl ether sodium sulfate 1-10g / L and tetradecyl dimethyl amine oxide 1-10g / L.

[0008] By adopting the above technical scheme, triethanolamine oleic acid soap, alcohol ether optimized surfactant, oleyl lipid surface material, fatty alcohol polyvinyl ether sodium sulfate and fatty alcohol polyvinyl ether sodium sulfate all have good emulsifying properties, which can not only emulsify oily substances into small particles so that the oily substances can be dispersed in water, but also form an interface film at the interface between oil and water, and the interface film can maintain the dispersed state of the oil particles to prevent the oil particles from re-aggregating during the thermal motion process. The mutual cooperation of the above surfactants makes the interface film have stronger stability, so that the oil will not float out of the water after emulsification and dispersion, resulting in unclean cleaning; in addition, triethanolamine oleic acid soap is a nonionic surfactant with good anti-rust performance, and will not corrode the metal when acting on the metal surface; the alcohol ether optimized surfactant also has good hard water resistance, which can prevent the calcium and magnesium ions in the water from affecting the anionic nonionic surfactant; the anionic nonionic surfactant prepared by the above surfactants not only has stronger emulsification ability, but also has stronger ability to maintain emulsification, so that the degreasing agent has better degreasing performance.

[0009] Optionally, the metal degreasing agent includes the following concentration components, 1.8-2.2 g / L sodium citrate, 3.9-4.4 g / L sodium metasilicate pentahydrate, 1-1.5 g / L disodium ethylenediaminetetraacetic acid, 2.5-3.2 g / L sodium gluconate, 3.5-4.5 g / L sodium hydroxide and 40-48 g / L anionic nonionic surfactant.

[0010] Optionally, the anionic nonionic surfactant includes the following concentration components: triethanolamine oleic acid soap 9-11 g / L, alcohol ether optimized surfactant 4-6 g / L, oleyl alcohol lipid surface substance 9-10 g / L, fatty alcohol polyvinyl ether sodium sulfate 9-10 g / L and tetradecyl dimethyl amine oxide 9-10 g / L.

[0011] By adopting the above technical scheme, the component ratio of the above degreasing agent and anionic nonionic surfactant is the optimal performance ratio obtained after multiple tests. The degreasing agent prepared by the above component ratio can fully remove and disperse the oily substances into the water, so that the oily substances can be smoothly washed away by water, and the anionic nonionic surfactant can fully emulsify the oily substances and maintain a high degree of emulsification, so that the oily substances are locked in the water, thereby making the degreasing agent have better oil removal performance.

[0012] Optionally, based on the weight of the alcohol ether optimized surfactant, the alcohol ether optimized surfactant includes the following weight components: 10-80 parts of nonylphenol polyoxyethylene ether, 10-20 parts of isopropanol, 5-10 parts of graphene, 1-5 parts of talc, and 3-14 parts of N-methylpyrrolidone.

[0013] Optionally, the preparation method of the alcohol ether optimized surfactant includes the following steps: mixing nonylphenol polyoxyethylene ether, isopropanol and N-methylpyrrolidone, stirring evenly, adding graphene and talcum powder, stirring and dispersing, and then ultrasonically dispersing until uniform to obtain the alcohol ether optimized surfactant.

[0014] By adopting the above technical scheme, nonylphenol polyoxyethylene ether has excellent emulsification ability, and isopropyl alcohol is an organic solvent with good solubility, which can promote penetration and dissolution, so the combination of the two can enhance the emulsification effect; graphene has a high specific surface area and strong physical adsorption properties. By adding graphene to the surfactant, oily substances can be adsorbed, thereby enhancing the emulsification of oil and water; talcum powder is a magnesium silicate salt with adsorption and lubrication properties, which can promote the dispersion and emulsification of oily substances in water, thereby enhancing the oil removal performance of the deoiler.

[0015] Optionally, the oleyl alcohol lipid surface substance is one or more of oleyl alcohol polyoxyethylene ether benzoate, fatty alcohol polyoxyethylene ether or isomeric carbon tridecaned polyoxyethylene ether.

[0016] By adopting the above technical scheme, the oleyl alcohol lipid surface substances can play an emulsifying role, reduce the surface tension of water and oil, and promote mutual wetting and penetration on the surface of insoluble liquids. In addition, these substances have good dispersibility and volume expansion properties, which promote the uniform dispersion of various surfactants in the deoiling agent, which is beneficial to improving the deoiling performance of the deoiling agent.

[0017] In the second aspect, the present application provides a method for preparing the above-mentioned non-floating oil and non-adhesive metal degreasing agent using the following technical solution: A method for preparing the above-mentioned non-floating oil and non-adhesive metal degreasing agent comprises the following steps: Sodium citrate, sodium metasilicate pentahydrate, disodium ethylenediaminetetraacetate, sodium gluconate and sodium hydroxide are mixed and stirred evenly, an anionic nonionic surfactant is added and stirred evenly to obtain a metal degreasing agent without floating oil and adhesion.

[0018] By adopting the above technical scheme, since the mixture of sodium citrate, sodium metasilicate pentahydrate, disodium ethylenediaminetetraacetic acid and sodium gluconate will cause the pH of the mixture to change due to the difference in the amount of each component, and the anionic non-ionic surfactant works better in a weakly alkaline environment, the deoiler is adjusted to an alkaline system by sodium hydroxide, which is beneficial for the various components of the deoiler to perform their corresponding functions. The deoiler prepared by the above scheme can have better oil removal performance.

[0019] In a third aspect, the present application provides a method for using the above-mentioned non-floating oil and non-adhesive metal degreasing agent using the following technical solution: A method for using the above-mentioned non-floating oil and non-adhesive metal degreasing agent comprises the following steps: S11, preparing a cleaning solution by mixing a non-floating oil and non-adhesive metal degreasing agent and water; S21, soaking the metal to be cleaned in the cleaning solution prepared in step S11, heating to 75-85°C, ultrasonically degreasing for 1-10 minutes, taking out the metal and washing it with water for 1-3 times; S31, connect the two ends of the metal to a power source and immerse it in the cleaning solution prepared in S11, electrolytically degrease for 1-5 minutes, take out the metal and wash it with water 1-3 times to complete the cleaning.

[0020] By adopting the above technical scheme, ultrasonic degreasing is used to remove oily substances with low adhesion to the metal surface. Ultrasonic degreasing can destroy the adhesion between the oily substance and the metal surface through ultrasonic vibration, so that it can be separated from the surface. In addition, when ultrasonic waves are transmitted in the liquid, high-pressure and low-pressure areas will be formed, causing the liquid to produce violent eddy currents and tiny bubbles. The bubbles continue to expand and burst, generating impact force and tiny jets, so that the oily substance can be separated from the metal surface, and the oily substance can be better dispersed in the water, and it is easier to form emulsification under the action of the degreasing agent, thereby achieving the purpose of degreasing; electrolytic degreasing is used to remove oily substances that cannot be removed by ultrasonic degreasing. The polarization effect of the electrode reduces the interfacial tension between the oil and the solution, and the wettability of the solution to the surface of the part is increased, so that the adhesion between the alcohol ether optimized surfactant and the metal is reduced, and the oil stains are easy to peel off and dispersed in the solution for emulsification and removal, thereby improving the degreasing effect and making the metal surface cleaner and tidier.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the metal shielding function of disodium ethylenediaminetetraacetic acid, heavy metal ions cannot affect the cleaning effect of sodium citrate, sodium metasilicate pentahydrate, sodium gluconate and anionic non-ionic surfactants. Through the emulsification effect of sodium metasilicate pentahydrate and anionic non-ionic surfactants, oily substances can be dispersed in water to form an emulsion, preventing oil from floating on the water surface or remaining on the metal surface, and achieving better oil removal performance; 2. The anionic nonionic surfactant prepared by triethanolamine oleic acid soap, oleyl alcohol lipid surface material, alcohol ether optimized surfactant, sodium fatty alcohol polyvinyl ether sulfate and tetradecyl dimethylamine oxide not only has stronger emulsification ability, but also has stronger ability to maintain emulsification, so that the degreasing agent has better degreasing performance; 3. The combination of ultrasonic degreasing and electrolytic degreasing makes the degreasing process faster and more effective. Ultrasonic degreasing can quickly remove large pieces of oil stains with low surface adhesion, while electrolytic degreasing can remove oil stains with high adhesion and difficult to separate, which is beneficial to improve the degreasing efficiency and the cleanliness of the metal after degreasing. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with embodiments and comparative examples.

[0023] The oleyl lipid surface material is oleyl polyoxyethylene ether benzoate, and the polymerization degree of oleyl polyoxyethylene ether benzoate is 15-20; Nonylphenol polyoxyethylene ether, CAS No. 26027-38-3, molecular weight 950-1000; Fatty alcohol polyvinyl ether sodium sulfate, degree of polymerization 2-3; Preparation Example 1 The preparation of anionic nonionic surfactant comprises the following steps: (1-a) 45 g of nonylphenol polyoxyethylene ether and 15 g of isopropanol were mixed and stirred evenly, 7 g of graphene and 3 g of talc were added, stirred for 10 min, and then ultrasonically dispersed for 30 min until uniform, to obtain an alcohol ether optimized surfactant.

[0024] (2-a) Take 4 g of triethanolamine oleic acid soap, 4 g of the alcohol ether optimized surfactant obtained in step (1-a), 4 g of oleyl alcohol polyoxyethylene ether benzoate, 4 g of fatty alcohol polyethylene ether sodium sulfate and 4 g of tetradecyl dimethyl amine oxide, stir well to obtain an anionic nonionic surfactant.

[0025] Preparation Example 2 The difference from Preparation Example 1 is that in step (2-a), the amount of triethanolamine oleate soap used is 5 g, and the amount of tetradecyl dimethyl amine oxide used is 8 g.

[0026] Preparation Example 3 The difference from Preparation Example 1 is that in step (2-a), the amount of triethanolamine oleic acid soap is 8 g, the amount of oleyl alcohol polyoxyethylene ether benzoate is 8 g, the amount of fatty alcohol polyvinyl ether sodium sulfate is 8 g, and the amount of tetradecyl dimethyl amine oxide is 8 g.

[0027] Preparation Example 4 The difference from Preparation Example 1 is that the amount of triethanolamine oleate soap in step (2-a) is 10 g, the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 5 g, the amount of oleyl alcohol polyoxyethylene ether benzoate is 10 g, the amount of fatty alcohol polyvinyl ether sodium sulfate is 10 g, and the amount of tetradecyl dimethyl amine oxide is 10 g.

[0028] Preparation Example 5 The difference from Preparation Example 1 is that the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 5 g, the amount of oleyl alcohol polyoxyethylene ether benzoate is 8 g, the amount of fatty alcohol polyvinyl ether sodium sulfate is 10 g, and the amount of tetradecyl dimethyl amine oxide is 5 g.

[0029] Preparation Example 6 The difference from Preparation Example 1 is that the amount of triethanolamine oleic acid soap in step (2-a) is 5 g, the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 5 g, the amount of oleyl alcohol polyoxyethylene ether benzoate is 10 g, and the amount of fatty alcohol polyvinyl ether sodium sulfate is 8 g.

[0030] Preparation Example 7 The difference from Preparation Example 1 is that the amount of triethanolamine oleate soap in step (2-a) is 6 g, the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 5 g, the amount of oleyl alcohol polyoxyethylene ether benzoate is 5 g, the amount of fatty alcohol polyvinyl ether sodium sulfate is 5 g, and the amount of tetradecyl dimethyl amine oxide is 10 g.

[0031] Preparation Example 8 The difference from Preparation Example 1 is that the amount of triethanolamine oleate soap in step (2-a) is 10 g, the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 5 g, the amount of oleyl alcohol polyoxyethylene ether benzoate is 5 g, and the amount of tetradecyl dimethyl amine oxide is 8 g.

[0032] Preparation Example 9 The difference from Preparation Example 1 is that the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 6 g, the amount of oleyl alcohol polyoxyethylene ether benzoate is 10 g, the amount of fatty alcohol polyvinyl ether sodium sulfate is 5 g, and the amount of tetradecyl dimethyl amine oxide is 6 g.

[0033] Preparation Example 10 The difference from Preparation Example 1 is that the amount of triethanolamine oleate soap in step (2-a) is 5 g, the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 6 g, the amount of oleyl alcohol polyoxyethylene ether benzoate is 3 g, the amount of fatty alcohol polyvinyl ether sodium sulfate is 1 g, and the amount of tetradecyl dimethyl amine oxide is 10 g.

[0034] Preparation Example 11 The difference from Preparation Example 1 is that the amount of triethanolamine oleic acid soap used in step (2-a) is 3 g, the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 3 g, and the amount of oleyl alcohol polyoxyethylene ether benzoate used is 8 g.

[0035] Preparation Example 12 The difference from Preparation Example 1 is that the amount of triethanolamine oleate soap in step (2-a) is 10 g, the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 6 g, the amount of fatty alcohol polyvinyl ether sodium sulfate is 6 g, and the amount of tetradecyl dimethyl amine oxide is 5 g.

[0036] Preparation Example 13 The difference from Preparation Example 1 is that the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 10 g, the amount of oleyl alcohol polyoxyethylene ether benzoate is 5 g, the amount of fatty alcohol polyvinyl ether sodium sulfate is 6 g, and the amount of tetradecyl dimethyl amine oxide is 10 g.

[0037] Preparation Example 14 The difference from Preparation Example 1 is that the amount of triethanolamine oleate soap in step (2-a) is 5 g, the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 10 g, the amount of oleyl alcohol polyoxyethylene ether benzoate is 10 g, and the amount of tetradecyl dimethyl amine oxide is 6 g.

[0038] Preparation Example 15 The difference from Preparation Example 1 is that the amount of triethanolamine oleate soap in step (2-a) is 5 g, the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 10 g, the amount of fatty alcohol polyvinyl ether sodium sulfate is 10 g, and the amount of tetradecyl dimethyl amine oxide is 6 g.

[0039] Preparation Example 16 The difference from Preparation Example 1 is that the amount of triethanolamine oleic acid soap in step (2-a) is 10 g, the amount of the alcohol ether optimized surfactant obtained in step (1-a) is 10 g, the amount of oleyl alcohol polyoxyethylene ether benzoate is 8 g, and the amount of fatty alcohol polyvinyl ether sodium sulfate is 5 g.

[0040] The anionic nonionic surfactant prepared in Preparation Example 1-16 was subjected to an oil floating test. 0.1 g of the surfactant was mixed with 100 ml of water to obtain a mixed solution. 20 ml of the mixed solution was added with 4 ml of oil. After stirring for 30 seconds, the mixture was poured into a circular watch glass with a diameter of 10 cm. The oil floating area was observed. The oil floating conversion parameter was obtained by the ratio of the oil floating area to the total area of ​​the watch glass. The smaller the oil floating conversion parameter, the smaller the oil floating area.

[0041] Table 1 Oil slick test results of anionic nonionic surfactants of Preparation Examples 1-16 Combining Preparation Examples 1-16 and Table 1, it can be seen that the anionic nonionic surfactants of Preparation Examples 1-16 all have lower floating oil conversion parameters, indicating that the anionic nonionic surfactants of Preparation Examples 1-16 have better emulsification properties, among which Preparation Examples 3, 4, 11, and 14 have better emulsification effects and smaller floating oil conversion parameters.

[0042] In Examples 1-15, the degreasing agent was prepared using the anionic nonionic surfactants of Preparation Examples 3, 4, 11, and 14 with good emulsification properties.

[0043] Embodiment 1, The preparation of the degreasing agent comprises the following steps: Mix 4 g of sodium citrate, 4 g of sodium metasilicate pentahydrate, 4 g of disodium ethylenediaminetetraacetate, 4 g of sodium gluconate, 2 g of sodium hydroxide and 1 L of deionized water, stir evenly, add 36 g of the anionic nonionic surfactant obtained in Preparation Example 3, stir evenly, and obtain a metal degreaser without floating oil and adhesion.

[0044] Example 2 The difference from Example 1 is that 45 g of the anionic nonionic surfactant obtained in Preparation Example 4 is added to replace the anionic nonionic surfactant obtained in Example 3.

[0045] Example 3 The difference from Example 1 is that 35 g of the anionic nonionic surfactant obtained in Preparation Example 14 is added to replace the anionic nonionic surfactant obtained in Example 3.

[0046] Example 4 The preparation of the degreasing agent comprises the following steps: Mix 3g of sodium citrate, 2g of sodium metasilicate pentahydrate, 1g of disodium ethylenediaminetetraacetate, 4g of sodium gluconate, 2g of sodium hydroxide and 1L of deionized water, stir evenly, add 36g of the anionic nonionic surfactant obtained in Preparation Example 3, stir evenly, and obtain a metal degreaser without floating oil and adhesion.

[0047] Example 5 The difference from Example 4 is that 45 g of the anionic nonionic surfactant obtained in Preparation Example 4 is added to replace the anionic nonionic surfactant obtained in Example 3.

[0048] Example 6 The difference from Example 4 is that 22 g of the anionic nonionic surfactant obtained in Preparation Example 11 is added to replace the anionic nonionic surfactant obtained in Example 3.

[0049] Example 7 The preparation of the degreasing agent comprises the following steps: Mix 1g of sodium citrate, 3g of sodium metasilicate pentahydrate, 4g of disodium ethylenediaminetetraacetate, 3g of sodium gluconate, 3g of sodium hydroxide and 1L of deionized water, stir evenly, add 45g of the anionic nonionic surfactant obtained in Preparation Example 4, stir evenly, and obtain a metal degreasing agent without floating oil and adhesion.

[0050] Example 8 The difference from Example 7 is that 22 g of the anionic nonionic surfactant obtained in Preparation Example 11 is added to replace the anionic nonionic surfactant obtained in Example 4.

[0051] Example 9 The difference from Example 7 is that 35 g of the anionic nonionic surfactant obtained in Preparation Example 14 is added to replace the anionic nonionic surfactant obtained in Example 4.

[0052] Example 10 The preparation of the degreasing agent comprises the following steps: Mix 2g of sodium citrate, 4g of sodium metasilicate pentahydrate, 1g of disodium ethylenediaminetetraacetate, 3g of sodium gluconate, 2g of sodium hydroxide and 1L of deionized water, stir evenly, add 36g of the anionic nonionic surfactant obtained in Preparation Example 3, stir evenly, and obtain a metal degreaser without floating oil and adhesion.

[0053] Embodiment 11 The difference from Example 10 is that 45 g of the anionic nonionic surfactant obtained in Preparation Example 4 is added to replace the anionic nonionic surfactant obtained in Example 3.

[0054] Example 12 The difference from Example 10 is that 22 g of the anionic nonionic surfactant obtained in Preparation Example 11 is added to replace the anionic nonionic surfactant obtained in Example 3.

[0055] Example 13 The preparation of the degreasing agent comprises the following steps: Mix 1g of sodium citrate, 3g of sodium metasilicate pentahydrate, 2g of disodium ethylenediaminetetraacetate, 4g of sodium gluconate, 4g of sodium hydroxide and 1L of deionized water, stir evenly, add 36g of the anionic nonionic surfactant obtained in Preparation Example 3, stir evenly, and obtain a metal degreaser without floating oil and adhesion.

[0056] Embodiment 14 The difference from Example 13 is that 22 g of the anionic nonionic surfactant obtained in Preparation Example 11 is added to replace the anionic nonionic surfactant obtained in Example 3.

[0057] Embodiment 15 The difference from Example 13 is that 35 g of the anionic nonionic surfactant obtained in Preparation Example 14 is added to replace the anionic nonionic surfactant obtained in Example 3.

[0058] Comparative Example 1 The difference from Example 1 is that no anionic nonionic surfactant is added.

[0059] Comparative Example 2 The difference from Example 4 is that no anionic nonionic surfactant is added.

[0060] Comparative Example 3 The difference from Example 7 is that no anionic nonionic surfactant is added.

[0061] Comparative Example 4 The difference from Example 10 is that no anionic nonionic surfactant is added.

[0062] Comparative Example 5 The difference from Example 13 is that no anionic nonionic surfactant is added.

[0063] The degreasing agents prepared in Examples 1-15 and Comparative Examples 1-5 were subjected to emulsification ability test and degreasing ability test.

[0064] Emulsification ability test: Prepare 1g / L degreasing agent aqueous solution, take 40ml of degreasing agent aqueous solution and oil in a 100ml container, stir at 1000r / min for 60s, place it in a 100ml measuring cylinder, and record the time required for 10ml of water phase to separate from the lower layer. The longer the time required for separation, the stronger the emulsification ability of the tested sample.

[0065] Degreasing ability test: select a metal sheet, polish and clean it, dry and weigh it, record it as m0, the drying condition is 40℃, time is 2h; then apply grease, and weigh the grease-covered test piece, record it as m1. At 60℃, use the degreasing agent in Examples 1-16 and Comparative Example 1 to degrease the test piece for 10 minutes. After degreasing, the test piece is rinsed in deionized water, then placed in a 50℃ drying oven for 1h, taken out and weighed, record it as m2. According to the formula Calculate the sample oil removal rate η.

[0066] Table 2 Emulsification ability test and oil removal ability test results of degreasing agents prepared in Examples 1-15 and Comparative Examples 1-5 Referring to Table 2 and Examples 1-15, it can be seen that the degreasing agents prepared in Examples 1-15 all show good delamination time and oil removal rate. After mixing with oil stains, they can maintain oil-water separation for a long time, and can remove most of the oil stains after cleaning the metal sheet, indicating that the degreasing agent of the present application has better emulsification and oil removal performance. Comparing Examples 1-15, it can be seen that Example 11 has the shortest delamination time and the highest oil removal rate, indicating that the degreasing agent prepared in Example 11 has the best emulsification and oil removal performance.

[0067] By comparing Example 1 and Comparative Example 1, Example 4 and Comparative Example 2, Example 7 and Comparative Example 3, Example 10 and Comparative Example 4, and Example 13 and Comparative Example 5, it can be seen that after not using the anionic nonionic surfactant, the emulsification performance and oil removal performance of the deoiler are significantly reduced, indicating that the anionic nonionic surfactant can significantly increase the emulsification performance and oil removal performance of the deoiler.

[0068] The embodiments of this specific implementation are all preferred embodiments of this application, and are not intended to limit the protection scope of this application. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the protection scope of this application.

Claims

1. A non-floating oil and non-adhesive metal degreasing agent, characterized in that: The invention comprises the following concentration components: 1-6 g / L sodium citrate, 2-7 g / L sodium metasilicate pentahydrate, 1-7 g / L disodium ethylenediaminetetraacetic acid, 1-5 g / L sodium gluconate, 1-10 g / L sodium hydroxide and 4.5-53 g / L anionic nonionic surfactant. The disodium ethylenediaminetetraacetic acid is used for complexing heavy metal ions in water so that other components are not affected by metal ions. The anionic nonionic surfactant is used for enhancing the emulsification of oily substances and water.

2. The non-floating oil and non-adhesive metal degreasing agent according to claim 1, characterized in that: The metal degreasing agent includes the following concentration components: 1.8-2.2 g / L of sodium citrate, 3.9-4.4 g / L of sodium metasilicate pentahydrate, 1-1.5 g / L of disodium ethylenediaminetetraacetic acid, 2.5-3.2 g / L of sodium gluconate, 3.5-4.5 g / L of sodium hydroxide and 40-48 g / L of anionic nonionic surfactant.

3. The non-floating oil and non-adhesive metal degreasing agent according to claim 1, characterized in that: The anionic nonionic surfactant comprises the following concentration components: 1-15 g / L of triethanolamine oleic acid soap, 0.5-8 g / L of alcohol ether optimized surfactant, 1-10 g / L of oleyl alcohol lipid surface material, 1-10 g / L of fatty alcohol polyvinyl ether sodium sulfate and 1-10 g / L of tetradecyl dimethyl amine oxide.

4. The non-floating oil and non-adhesive metal degreasing agent according to claim 1, characterized in that: The anionic nonionic surfactant includes the following concentration components: triethanolamine oleic acid soap 9-11 g / L, alcohol ether optimized surfactant 4-6 g / L, oleyl alcohol lipid surface material 9-10 g / L, fatty alcohol polyvinyl ether sodium sulfate 9-10 g / L and tetradecyl dimethyl amine oxide 9-10 g / L.

5. The non-floating oil and non-adhesive metal degreasing agent according to claim 3, characterized in that: Taking the weight of the alcohol ether optimized surfactant as a reference, the alcohol ether optimized surfactant includes the following weight components: 10-80 parts of nonylphenol polyoxyethylene ether, 10-20 parts of isopropanol, 5-10 parts of graphene, 1-5 parts of talc, and 3-14 parts of N-methylpyrrolidone.

6. The non-floating oil and non-adhesive metal degreasing agent according to claim 5, characterized in that: The preparation method of the alcohol ether optimized surfactant comprises the following steps: mixing nonylphenol polyoxyethylene ether, isopropanol and N-methyl pyrrolidone, stirring evenly, adding graphene and talcum powder, stirring and dispersing and then ultrasonically dispersing until uniform, so as to obtain the alcohol ether optimized surfactant.

7. The non-floating oil and non-adhesive metal degreasing agent according to claim 3, characterized in that: The oleyl alcohol lipid surface material is selected from one or more of oleyl alcohol polyoxyethylene ether benzoate, fatty alcohol polyoxyethylene ether and isomeric carbon tridecanol polyoxyethylene ether.

8. A method for preparing the non-floating oil and non-adhesive metal degreasing agent according to any one of claims 1 to 7, characterized in that: The steps include: The sodium citrate, sodium metasilicate pentahydrate, disodium ethylenediaminetetraacetate, sodium gluconate and sodium hydroxide are mixed and stirred evenly, an anionic nonionic surfactant is added and stirred evenly to obtain a metal degreasing agent without floating oil and adhesion.

9. A method for using the non-floating oil and non-adhesive metal degreasing agent according to any one of claims 1 to 7, characterized in that: The steps include: S11, preparing a cleaning solution by mixing a non-floating oil and non-adhesive metal degreasing agent and water; S21, soaking the metal to be cleaned in the cleaning solution prepared in step S11, heating to 75-85°C, ultrasonically degreasing for 1-10 minutes, taking out the metal and washing it with water for 1-3 times; S31, connect the two ends of the metal to a power source and immerse it in the cleaning solution prepared in S11, electrolytically degrease for 1-5 minutes, take out the metal and wash it with water 1-3 times to complete the cleaning.

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