A low-temperature and high-efficiency metal cleaning agent and preparation method thereof

Abstract

The present invention belongs to the technical field of metal cleaning agents, specifically a low-temperature and high-efficiency metal cleaning agent and a preparation method thereof. The low-temperature and high-efficiency metal cleaning agent is composed of the following raw materials in volume percentage: 11-23% biodegradable surfactant, 2-3% penetrant, 4-7% ionic liquid composition, and the balance is water. When used, it is diluted with water and sprayed on the metal surface, left to stand for 1 to 5 minutes, and then rinsed. The cleaning agent prepared by the present invention has strong cleaning power, has good decontamination ability for metals under relatively low temperature conditions, has no corrosion to metal surfaces, and can improve the corrosion resistance of metals. It is safe and non-toxic, has a simple preparation process, and has broad application prospects.

Description

Technical Field

[0001] The invention belongs to the technical field of metal cleaning agents, and specifically relates to a low-temperature and high-efficiency metal cleaning agent and a preparation method thereof. Background Art

[0002] Metal cleaners are indispensable chemicals in industrial production, used to remove pollutants such as oil, dust, and oxides from metal surfaces. Traditional metal cleaners may contain harmful solvents, posing a threat to the environment and the health of operators. Therefore, the development of environmentally friendly and biodegradable metal cleaners has become a research hotspot.

[0003] In recent years, biodegradable surfactants have attracted attention due to their low pollution to the environment. They have mild cleaning properties and low irritation to the skin, and can be decomposed by microorganisms in the natural environment, reducing the negative impact on the ecosystem. However, their lack of cleaning power in metal cleaning limits their application in metal cleaning agents. As a new type of green solvent, ionic liquids have unique chemical and physical properties, such as high thermal stability, low vapor pressure, good conductivity and chemical inertness, which make their application prospects in metal cleaning agents broad. In this context, it is particularly important to develop a metal cleaning agent based on biodegradable surfactants and ionic liquids. Summary of the invention

[0004] The invention provides an environmentally friendly low-temperature and high-efficiency metal cleaning agent, which adopts a surfactant with good biodegradability as the main raw material, is matched with a variety of high-efficiency auxiliary agents and specific ionic liquids, and has the characteristics of being non-toxic and harmless, low-temperature cleaning, high-efficiency oil removal, wide application range, easy rinsing without residue and non-corrosiveness.

[0005] The environmentally friendly low-temperature and high-efficiency metal cleaning agent of the present invention is composed of the following raw materials in percentage by volume:

[0006] 11-23% biodegradable surfactant, 2-3% penetrant, 4-7% ionic liquid composition, and the balance is water.

[0007] Furthermore, the environmentally friendly low-temperature and high-efficiency metal cleaning agent is composed of the following raw materials in percentage by volume: 15-23% of a biodegradable surfactant, 2-3% of a penetrant, 6-7% of an ionic liquid composition, and the remainder is water.

[0008] Furthermore, the biodegradable surfactant is coconut glucoside.

[0009] Furthermore, the penetrant is ethylene glycol ethyl ether.

[0010] Furthermore, the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:1.5 to 3.5.

[0011] Preferably, the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:2.5 to 3.5.

[0012] The preparation method of the above-mentioned environmentally friendly low-temperature and high-efficiency metal cleaning agent is: a biodegradable surfactant, a penetrant, an ionic liquid composition, and water are mixed in a volume ratio, mixed at 50-65° C. for 10-20 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0013] The application of the above-mentioned environmentally friendly low-temperature and high-efficiency metal cleaning agent in cleaning metals comprises the following steps:

[0014] Evenly mix the environmentally friendly low-temperature and high-efficiency metal cleaning agent and water in a volume ratio of 1:5-7, spray it on the metal surface, let it stand at room temperature for 1-5 minutes, and rinse it clean.

[0015] The beneficial effects of the present invention are:

[0016] (1) The liquid composition of the present invention is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in an appropriate ratio. Through the synergistic effect of the two, the penetration effect and cleaning efficiency of the cleaning agent can be enhanced and the generation of foam can be reduced. 1-Butyl-3-methylimidazolium hexafluorophosphate can interact with organic matter such as oil stains to reduce the oil-water interfacial tension, making the oil stains more easily dispersed in water, thereby improving the cleaning effect. At the same time, it can also complex with stains on the metal surface to promote the removal of stains and prevent them from settling.

[0017] (2) The present invention uses the biodegradable surfactant coconut glucoside as a raw material and an ionic liquid composition, so that the cleaning effect of coconut glucoside is enhanced while reducing the pollution of the cleaning agent to the environment. The present invention optimizes the ratio of coconut glucoside and the ionic liquid composition, so that the cleaning agent can exert an excellent cleaning effect at a lower dosage of the ionic liquid composition and at a lower temperature, has a higher cleaning efficiency, and reduces the use of chemicals.

[0018] (3) The cleaning agent prepared by the present invention does not contain harmful substances, has no impact on the environment and human health, has no corrosive effect on the metal surface, and can improve the corrosion resistance of the metal. The preparation process is simple and has broad application prospects. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of 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.

[0020] Example 1

[0021] The environmentally friendly low-temperature and high-efficiency metal cleaning agent of this embodiment is composed of the following raw materials in percentage by volume:

[0022] 11% coconut glucoside, 3% ethylene glycol ethyl ether, 6% ionic liquid composition, and the balance is water; wherein the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:3.

[0023] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0024] Example 2

[0025] The environmentally friendly low-temperature and high-efficiency metal cleaning agent of this embodiment is composed of the following raw materials in percentage by volume:

[0026] 15% coconut glucoside, 3% ethylene glycol ethyl ether, 6% ionic liquid composition, and the balance is water; wherein the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:3.

[0027] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0028] Example 3

[0029] The environmentally friendly low-temperature and high-efficiency metal cleaning agent of this embodiment is composed of the following raw materials in percentage by volume:

[0030] 19% coconut glucoside, 3% ethylene glycol ethyl ether, 6% ionic liquid composition, and the balance is water; wherein the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:3.

[0031] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0032] Example 4

[0033] The environmentally friendly low-temperature and high-efficiency metal cleaning agent of this embodiment is composed of the following raw materials in percentage by volume:

[0034] 23% coconut glucoside, 3% ethylene glycol ethyl ether, 6% ionic liquid composition, and the balance is water; wherein the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:3.

[0035] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0036] Example 5

[0037] The environmentally friendly low-temperature and high-efficiency metal cleaning agent of this embodiment is composed of the following raw materials in percentage by volume:

[0038] 19% coconut glucoside, 3% ethylene glycol ethyl ether, 4% ionic liquid composition, and the balance is water; wherein the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:3.

[0039] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0040] Example 6

[0041] The environmentally friendly low-temperature and high-efficiency metal cleaning agent of this embodiment is composed of the following raw materials in percentage by volume:

[0042] 19% coconut glucoside, 3% ethylene glycol ethyl ether, 5% ionic liquid composition, and the balance is water; wherein the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:3.

[0043] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0044] Example 7

[0045] The environmentally friendly low-temperature and high-efficiency metal cleaning agent of this embodiment is composed of the following raw materials in percentage by volume:

[0046] 19% coconut glucoside, 3% ethylene glycol ethyl ether, 7% ionic liquid composition, and the balance is water; wherein the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:3.

[0047] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0048] Example 8

[0049] The environmentally friendly low-temperature and high-efficiency metal cleaning agent of this embodiment is composed of the following raw materials in percentage by volume:

[0050] 19% coconut glucoside, 3% ethylene glycol ethyl ether, 6% ionic liquid composition, and the balance is water; wherein the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:1.5.

[0051] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0052] Example 9

[0053] The environmentally friendly low-temperature and high-efficiency metal cleaning agent of this embodiment is composed of the following raw materials in percentage by volume:

[0054] 19% coconut glucoside, 3% ethylene glycol ethyl ether, 6% ionic liquid composition, and the balance is water; wherein the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:2.

[0055] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0056] Example 10

[0057] The environmentally friendly low-temperature and high-efficiency metal cleaning agent of this embodiment is composed of the following raw materials in percentage by volume:

[0058] 19% coconut glucoside, 3% ethylene glycol ethyl ether, 6% ionic liquid composition, and the balance is water; wherein the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:2.5.

[0059] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0060] Embodiment 11

[0061] The environmentally friendly low-temperature and high-efficiency metal cleaning agent of this embodiment is composed of the following raw materials in percentage by volume:

[0062] 19% coconut glucoside, 3% ethylene glycol ethyl ether, 6% ionic liquid composition, and the balance is water; wherein the ionic liquid composition is prepared by mixing 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate in a volume ratio of 1:3.5.

[0063] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0064] Comparative Example 1

[0065] The environmentally friendly low-temperature high-efficiency metal cleaning agent of this comparative example is composed of the following raw materials in percentage by volume:

[0066] 19% coconut glucoside, 3% ethylene glycol ethyl ether, the balance is water.

[0067] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0068] Comparative Example 2

[0069] The environmentally friendly low-temperature high-efficiency metal cleaning agent of this comparative example is composed of the following raw materials in percentage by volume:

[0070] 15% coconut glucoside, 3% ethylene glycol ethyl ether, 6% 1-ethyl-3-methylimidazolium acetate, and the balance is water.

[0071] The above raw materials are mixed evenly, mixed at 55°C for 15 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

[0072] The cleaning agent prepared in the embodiment and the comparative example and water were mixed in a volume ratio of 1:7, and the same amount of the cleaning agent was sprayed on the surface of a 304 stainless steel plate (the surface of the stainless steel plate contained the same content of the following simulated pollutants: carbon black, engine oil, rust, and oleic acid), left to stand for 2 minutes, rinsed with clean water, and then 5 evaluators were asked to score whether the visual perception and hand touch were clean (1-5 points, the higher the score, the cleaner), and the average of the sum of all the scores was the decontamination effect. The results are shown in Table 1.

[0073] The 304 stainless steel plate after cleaning was subjected to a neutral salt spray test (with a concentration of 3.5 wt % sodium chloride aqueous solution) to test the corrosion resistance of the stainless steel plate after cleaning by the cleaning agent. The results are shown in Table 1.

[0074] Table 1

[0075]

[0076]

[0077] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A low-temperature and high-efficiency metal cleaning agent, characterized in that: The invention is composed of the following raw materials in volume percentage: 11-23% of a biodegradable surfactant, 2-3% of a penetrant, 4-7% of an ionic liquid composition, and the balance of water; the ionic liquid composition is composed of 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate; the volume ratio of the 1-ethyl-3-methylimidazolium acetate to the 1-butyl-3-methylimidazolium hexafluorophosphate is 1:1.5-3.

5.

2. The low-temperature and high-efficiency metal cleaning agent according to claim 1, characterized in that: The invention is composed of the following raw materials in volume percentage: 15-23% of a biodegradable surfactant, 2-3% of a penetrant, 6-7% of an ionic liquid composition, and the balance is water; the ionic liquid composition is composed of 1-ethyl-3-methylimidazolium acetate and 1-butyl-3-methylimidazolium hexafluorophosphate.

3. The low-temperature and high-efficiency metal cleaning agent according to claim 1 or 2, characterized in that: The biodegradable surfactant is coco-glucoside.

4. The low-temperature and high-efficiency metal cleaning agent according to claim 1 or 2, characterized in that: The penetrant is ethylene glycol ethyl ether.

5. A method for preparing a low-temperature and high-efficiency metal cleaning agent according to claim 1, characterized in that: The biodegradable surfactant, the penetrant, the ionic liquid composition and water are mixed according to a volume ratio, mixed at 50-65° C. for 10-20 minutes, and cooled to obtain an environmentally friendly low-temperature and high-efficiency metal cleaning agent.

6. An application of the low-temperature and high-efficiency metal cleaning agent according to claim 1, characterized in that: Mix environmentally friendly low-temperature and high-efficiency metal cleaning agent and water in a volume ratio of 1:5~7, spray it on the metal surface, let it stand at room temperature for 1~5 minutes, and rinse it clean.

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