A multi-purpose rust removal cleaning agent and preparation method thereof

Abstract

The invention provides a multi-purpose rust-removing cleaning agent and a preparation method thereof. The cleaning agent is mainly prepared from the following raw materials by weight: 15-21 parts of citric acid, 9-17 parts of oxalic acid, 5-15 parts of JFC-1 quick penetrant, 2.5-6.5 parts of nonylphenol polyoxyethylene ether, 3.5-8 parts of hydroxylamine hydrochloride, 0.7-1.5 parts of stannous chloride and an appropriate amount of water. The multi-purpose rust-removing cleaning agent provided by the invention is suitable for practical cleaning at sewage sites and water treatment sites, and is also used for cleaning rust stains on marble and the like contaminated by rust stains.

Description

Technical Field

[0001] The invention belongs to the field of rust removers, and in particular relates to a multi-purpose rust remover cleaning agent for sewage treatment and civil use and a preparation method thereof. Background Art

[0002] At the sewage treatment site, using a pump to add chemicals is a common operation. However, when dealing with colored liquids, these liquids often contain gravel and insoluble matter, and these impurities can easily cause pump blockage. When the pump needs to be disassembled for cleaning, due to the pressure inside the pipeline, the liquid will splash around the dosing room, on the ground, walls and equipment, and even on the clothes and hands of the staff. After drying, this splashed liquid will form reddish-brown stains. These marks will be further deepened by oxidation in the air, showing a more obvious reddish-brown color, which is commonly known as rust.

[0003] The presence of rust not only seriously affects the cleanliness and beauty of the dosing site, but also brings many inconveniences to the on-site assessment and increases the work pressure of the staff. In order to solve this problem, a variety of rust removal methods have appeared on the market, mainly including mechanical methods and chemical methods.

[0004] The mechanical method mainly removes rust by manual scraping and grinding. However, this method requires a lot of manpower and material resources, and it is easy to damage the ground and equipment during the treatment process, so it is not applicable at the sewage treatment site.

[0005] The chemical rule is to remove rust by using chemical rust removers. However, the chemical rust removers currently on the market are not very effective and often cause corrosion to the objects being treated during use. More importantly, these rust removers are difficult to clean after contacting clothing and skin, causing great trouble to the staff.

[0006] Therefore, there is an urgent need for a medicament that can effectively remove rust without corroding the treated object or polluting clothes and skin.

[0007] In view of this, the present invention is proposed. Summary of the invention

[0008] The first object of the present invention is to provide a multi-purpose rust-removing cleaning agent, which is not only suitable for practical cleaning at sewage sites and water treatment sites, but also suitable for cleaning rust stains on rust-contaminated marble and the like.

[0009] The second purpose of the present invention is to provide a method for preparing the above-mentioned multi-purpose rust removing cleaning agent. The preparation method is simple to operate and can achieve rapid preparation of the product. The entire operation process is gentle and does not produce harmful substances, thereby realizing a green and environmentally friendly production process.

[0010] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted: The invention provides a multi-purpose rust removing cleaning agent, which is mainly prepared from the following raw materials, measured by weight: 15-21 parts of citric acid, 9-17 parts of oxalic acid, 5-15 parts of JFC-1 quick penetrant, 2.5-6.5 parts of nonylphenol polyoxyethylene ether, 3.5-8 parts of hydroxylamine hydrochloride, 0.7-1.5 parts of stannous chloride and an appropriate amount of water.

[0011] Preferably, as a further feasible scheme, in parts by mass: 16-20 parts of citric acid, 11-16 parts of oxalic acid, 10-13 parts of JFC-1 quick penetrant, 3-6 parts of nonylphenol polyoxyethylene ether, 4.5-7 parts of hydroxylamine hydrochloride, and 0.8-1.3 parts of stannous chloride.

[0012] Preferably, as a further feasible implementation plan, in parts by mass: 18 parts of citric acid, 15 parts of oxalic acid, 8 parts of JFC-1 quick penetrant, 5 parts of nonylphenol polyoxyethylene ether, 6 parts of hydroxylamine hydrochloride, and 1.2 parts of stannous chloride.

[0013] Preferably, as a further feasible embodiment, the water is tap water, and the amount of tap water used is 45-51 parts by mass.

[0014] Among the above raw materials, citric acid, one of the core raw materials of the present invention, can react with iron to form a complex, effectively converting the secondary rust into a soluble iron citrate complex, thereby achieving the dissolution and removal of the rust. Oxalic acid, another key raw material, can form a stable planar five-membered chelate ring structure complex with trivalent iron ions, which not only enhances the stability of the complex, but also has the ability to reduce trivalent iron ions to divalent iron ions, while also showing good thermal stability.

[0015] JFC-1 quick penetrant, as an amphoteric surfactant with both nonionic and anionic properties, has fast penetration, uniform wetting effect and excellent foaming properties. Its performance is not limited by temperature and is suitable for rust removal work under various environmental conditions.

[0016] Nonylphenol polyoxyethylene ether is a high molecular compound and a non-ionic surfactant. It integrates multiple functions such as cleaning, emulsification, dissolution, wetting, dispersion, and penetration. It provides comprehensive support for the rust removal process and further improves the efficiency and effect of rust removal.

[0017] At the same time, hydroxylamine hydrochloride and stannous chloride also play an important role in the present invention. They can reduce trivalent iron ions to colorless divalent iron ions, effectively eliminating the red component in the rust, making the surface after rust removal cleaner and brighter.

[0018] In addition to providing a formula of a multi-purpose rust removing cleaning agent, the present invention also provides a preparation method of the multi-purpose rust removing cleaning agent, comprising the following steps: Add water and stir, and add citric acid and oxalic acid in sequence during stirring until dissolved; Then add stannous chloride and hydroxylamine hydrochloride and continue stirring until dissolved; Finally, add nonylphenol polyoxyethylene ether and JFC-1 quick penetrant and continue stirring.

[0019] Preferably, in the step of adding citric acid and oxalic acid and stirring until dissolved, the stirring time is 8-12 minutes.

[0020] Preferably, in the step of adding nonylphenol polyoxyethylene ether and JFC-1 quick penetrant and continuing to stir, the stirring time is 50-70 minutes.

[0021] Preferably, all the stirring steps are carried out under conditions without heating, cooling or applying additional pressure (ie, at normal temperature and pressure).

[0022] Preferably, the stirring speed is 70-80 rpm.

[0023] In the present invention, by limiting various operating parameters in the preparation method, the quality of the cleaning agent of the present invention is improved, so that the cleaning agent is not affected by external factors and deteriorates during storage.

[0024] Compared with the prior art, the present invention has the following beneficial effects: The cleaning agent of the present invention can effectively utilize the complexing reaction ability of citric acid and oxalic acid as main components with careful proportions to achieve efficient dissolution of rust, and the combined use of citric acid and oxalic acid also enhances the stability of the complex, making the cleaning process of rust more rapid and thorough; at the same time, oxalic acid can also reduce part of trivalent iron ions to divalent iron ions, further promoting the cleaning of rust, and ensuring that the surface of the rust after cleaning is brighter and cleaner. The addition of JFC-1 quick penetrant and nonylphenol polyoxyethylene ether adds excellent permeability, wettability and dispersibility to the cleaning agent; these characteristics enable the cleaning agent to quickly penetrate into the tiny gaps of rust and effectively separate the rust; at the same time, it prevents the redeposition of rust, thereby greatly improving the efficiency and effect of cleaning; especially on complex or difficult-to-reach surfaces, the synergistic effect of the two surfactants is particularly obvious. The introduction of hydroxylamine hydrochloride and stannous chloride not only enhances the reducing ability of the cleaning agent, but also effectively eliminates the red component in the rust, making the surface of the material after cleaning the rust cleaner and brighter. This is especially important when the original color of the metal needs to be maintained or subsequent painting is required.

[0025] The present invention also strictly controls parameters such as stirring time and rotation speed during the preparation process, and uses the solid in liquid form, which is easy to operate; the quality of the cleaning agent and the storage stability are ensured; this makes the cleaning agent less likely to deteriorate during long-term storage, thereby ensuring its reliability and durability in practical applications; the multi-purpose rust-removing cleaning agent shows significant beneficial effects in terms of wide applicability, high-efficiency rust-removing performance, environmental protection and economy, ease of use, and recovery effect, and has obvious advantages over the prior art.

[0026] Specific implementation method The technical scheme of the present invention will be clearly and completely described below in conjunction with specific embodiments, but it will be appreciated by those skilled in the art that the following described embodiments are some embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work, all belong to the scope of protection of the present invention. If specific conditions are not indicated in the embodiments, they are carried out according to normal conditions or conditions recommended by the manufacturer. If the manufacturer is not indicated in the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0027] Example 1 The specific preparation process of the multi-purpose rust removal cleaning agent is carried out according to the following steps: 51 kg of tap water was added to the reactor and stirred. During the stirring process, 20 kg of citric acid and 11 kg of oxalic acid were added to the reactor in sequence and stirred until dissolved. Under normal temperature and pressure, the stirring speed was 75 rpm and the stirring time was 12 min. Then, 1.5 kg of stannous chloride and 5 kg of hydroxylamine hydrochloride were added to the reaction kettle and stirred continuously until dissolved. The stirring speed was 75 rpm under normal temperature and pressure conditions. Finally, 3 kg of nonylphenol polyoxyethylene ether and 10 kg of JFC-1 quick penetrant were added to the reactor and stirred until uniform. Under normal temperature and pressure, the stirring speed was 75 rpm and the stirring time was 60 min to obtain the product.

[0028] Example 2 The specific preparation process of the multi-purpose rust removal cleaning agent is carried out according to the following steps: 46.8 kg of tap water was added to the reactor and stirred. During the stirring process, 18 kg of citric acid and 15 kg of oxalic acid were added to the reactor in sequence and stirred until dissolved. Under normal temperature and pressure conditions, the stirring speed was 75 rpm and the stirring time was 10 min. Then, 1.2 kg of stannous chloride and 6 kg of hydroxylamine hydrochloride were added to the reaction kettle and stirred continuously until dissolved. The stirring speed was 75 rpm under normal temperature and pressure conditions. Finally, 5 kg of nonylphenol polyoxyethylene ether and 8 kg of JFC-1 quick penetrant were added to the reactor and stirred until uniform. Under normal temperature and pressure, the stirring speed was 75 rpm and the stirring time was 60 min to obtain the product.

[0029] Example 3 The specific preparation process of the multi-purpose rust removal cleaning agent is carried out according to the following steps: 50 kg of tap water was added to the reactor and stirred. During the stirring process, 16 kg of citric acid and 13 kg of oxalic acid were added to the reactor in sequence and stirred until dissolved. Under normal temperature and pressure conditions, the stirring speed was 75 rpm and the stirring time was 9 min. Then, 0.8 kg of stannous chloride and 4.5 kg of hydroxylamine hydrochloride were added to the reaction kettle and stirred continuously until dissolved. The stirring speed was 75 rpm under normal temperature and pressure. Finally, 4 kg of nonylphenol polyoxyethylene ether and 13 kg of JFC-1 quick penetrant were added to the reactor and stirred until uniform. Under normal temperature and pressure, the stirring speed was 75 rpm and the stirring time was 60 min to obtain the product.

[0030] Example 4 The specific preparation process of the multi-purpose rust removal cleaning agent is carried out according to the following steps: 45 kg of tap water was added to the reactor and stirred. During the stirring process, 15 kg of citric acid and 9 kg of oxalic acid were added to the reactor in sequence and stirred until dissolved. Under normal temperature and pressure conditions, the stirring speed was 70 rpm and the stirring time was 8 min. Then, 0.7 kg of stannous chloride and 3.5 kg of hydroxylamine hydrochloride were added to the reaction kettle and stirred continuously until dissolved. The stirring speed was 70 rpm under normal temperature and pressure conditions. Finally, 2.5 kg of nonylphenol polyoxyethylene ether and 5 kg of JFC-1 quick penetrant were added to the reactor and stirred until uniform. Under normal temperature and pressure, the stirring speed was 70 rpm and the stirring time was 70 min to obtain the product.

[0031] Example 5 The specific preparation process of the multi-purpose rust removal cleaning agent is carried out according to the following steps: 48.5 kg of tap water was added to the reactor and stirred. During the stirring process, 21 kg of citric acid and 17 kg of oxalic acid were added to the reactor in sequence and stirred until dissolved. Under normal temperature and pressure conditions, the stirring speed was 80 rpm and the stirring time was 12 min. Then, 1.3 kg of stannous chloride and 8 kg of hydroxylamine hydrochloride were added to the reaction kettle and stirred continuously until dissolved. The stirring speed was 80 rpm under normal temperature and pressure conditions. Finally, 6 kg of nonylphenol polyoxyethylene ether and 15 kg of JFC-1 quick penetrant were added to the reactor and stirred until uniform. Under normal temperature and pressure conditions, the stirring speed was 80 rpm and the stirring time was 50 min to obtain the product.

[0032] Example 6 The specific preparation process of the multi-purpose rust removal cleaning agent is carried out according to the following steps: Take 48 kg of tap water and add it into the reactor and stir. During the stirring process, add 19 kg of citric acid and 16 kg of oxalic acid into the reactor and stir until dissolved. Under normal temperature and pressure, the stirring speed is 70 rpm and the stirring time is 10 min. Then, 1 kg of stannous chloride and 7 kg of hydroxylamine hydrochloride were added to the reaction kettle and stirred continuously until dissolved. The stirring speed was 70 rpm under normal temperature and pressure conditions. Finally, 6.5 kg of nonylphenol polyoxyethylene ether and 11 kg of JFC-1 quick penetrant were added to the reactor and stirred until uniform. Under normal temperature and pressure conditions, the stirring speed was 70 rpm and the stirring time was 55 min to obtain the product.

[0033] Example 7 The specific implementation method is consistent with Example 2, except that the mass fraction of stannous chloride is changed to 0.7 kg.

[0034] Comparative Example 1 The specific implementation method is consistent with Example 2, except that the mass fraction of citric acid is changed to 2 kg.

[0035] Comparative Example 2 The specific implementation method is consistent with Example 2, except that the mass fraction of citric acid is changed to 29 kg.

[0036] Comparative Example 3 The specific implementation method is consistent with Example 2, except that the mass fraction of oxalic acid is 25 kg.

[0037] Comparative Example 4 The specific implementation method is consistent with Example 3, except that the mass fraction of oxalic acid is changed to 3kg.

[0038] Experimental Example 1 The cleaning agents prepared in the above experimental examples and comparative examples were used to carry out cleaning experiments on rust stains on different materials. The experimental results are shown in Table 1.

[0039] The specific materials that need to be derusted are artificially made: 1. Wall: Take a piece of gypsum board as the base, evenly apply putty powder on its surface and scrape it flat to ensure that the wall is flat and flawless. After the putty powder dries, apply two coats of latex paint. Finally, spray the dried wall with colored liquid, which will show red stains after air drying; 2. Light-colored clothes: Choose an old piece of light-colored clothing, simulate the stains during use, spray the colored liquid evenly on the surface of the clothing, and let it dry naturally. After drying, obvious red stains will be left on the clothes; 3. White tiles: Take a small piece of white tile and apply the colored liquid directly to the surface of the tile to form a red stain; 4. Hand skin: Spray the colored liquid onto your hands, and the skin of your hands will quickly turn red.

[0040] Table 1. Cleaning results of rust on different materials

[0041] Based on the above data, the following conclusions can be drawn: By comprehensively evaluating the cleaning of rust on different materials by the cleaning agents of Examples 1 to 7 and Comparative Examples 1 to 4, it can be seen that the multi-purpose rust removal cleaning agent of the present invention exhibits excellent cleaning performance and stability, and the cleaning effect is significant and widely applicable; in particular, it can be seen from Examples 1 to 7 that the cleaning agent formula of Example 2 achieves a colorless residue cleaning effect on all tested materials, and it can be seen that the ratio of the components in the cleaning agent of the present invention and the preparation parameters corresponding to the ratio will affect the effect of cleaning rust through the synergistic comprehensive effect; similarly, Examples 3 to 7 also show good cleaning effects on a variety of materials, although there is a slight color retention in individual cases, but overall, the effect of cleaning rust is still significant; the ratio of the components in the multi-purpose rust removal cleaning agent of the present invention and the preparation parameters corresponding to the ratio will affect the cleaning effect through the synergistic comprehensive effect, and the best cleaning effect can be obtained by selecting the optimal ratio relationship.

[0042] By comparing the cleaning effects of Examples 1-7 and Comparative Examples 1-4, it can be clearly seen that the content of each component in the formula has an impact on the cleaning effect. In particular, the amount of citric acid and oxalic acid used has a significant impact on the cleaning effect of the cleaning agent. In the examples, with the reasonable adjustment of citric acid and oxalic acid, especially when 18 kg of citric acid and 15 kg of oxalic acid are used in combination in Example 2, the cleaning agent can show excellent cleaning effects, and can achieve the best cleaning effect of colorless and no residue on all test materials.

[0043] It can be seen from the comparative examples that when other conditions remain unchanged, in Comparative Examples 1 and 2, when the mass fraction of citric acid is too low or too high, it will affect the cleaning effect of the cleaning agent of the present invention on cleaning rust stains, and when the mass fraction of oxalic acid is too high or too low in Comparative Examples 3 and 4, it will also affect the cleaning effect of the cleaning agent of the present invention. It shows that the cleaning agent of the present invention cannot be obtained by only knowing the compound combination of raw materials, and there is an important synergistic effect between the citric acid and oxalic acid of the present invention. When the amount of each component is within a certain range, the cleaning agent of the present invention can be prepared and the excellent cleaning effect of the multi-purpose rust removal cleaning agent of the present invention can be exerted.

[0044] Of course, in addition to citric acid and oxalic acid, the amount of other raw materials of the present invention, such as JFC-1 quick penetrant, nonylphenol polyoxyethylene ether, hydroxylamine hydrochloride and stannous chloride, will also affect the cleaning effect of the cleaning agent, and the parameters such as stirring acidity and stirring time will also have a certain impact on the cleaning effect. On the whole, when these parameters change, the stability of the cleaning effect of the cleaning agent will be affected; in the embodiment, when these parameters are controlled within a certain range and the content relationship between them is reasonable, the cleaning agent can show the best cleaning effect; it reflects that the combination of the component parameters between the raw materials of the cleaning agent of the present invention is crucial to the cleaning performance of the cleaning agent.

[0045] In the experimental examples, the cleaning effects of rust on different materials were tested, and the results showed that the multi-purpose rust cleaning agent of the present invention performed well on these different materials, proving that the cleaning agent of the present invention can be widely used in multiple places and will not cause harm to human skin.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-purpose rust removal cleaning agent, characterized in that: The main raw materials are as follows, calculated by weight: 15-21 parts of citric acid, 9-17 parts of oxalic acid, 5-15 parts of JFC-1 quick penetrant, 2.5-6.5 parts of nonylphenol polyoxyethylene ether, 3.5-8 parts of hydroxylamine hydrochloride, 0.7-1.5 parts of stannous chloride and appropriate amount of water.

2. The multi-purpose rust removing cleaning agent according to claim 1, characterized in that: In parts by mass: 16-20 parts of citric acid, 11-16 parts of oxalic acid, 10-13 parts of JFC-1 quick penetrant, 3-6 parts of nonylphenol polyoxyethylene ether, 4.5-7 parts of hydroxylamine hydrochloride, and 0.8-1.3 parts of stannous chloride.

3. The multi-purpose rust removing cleaning agent according to claim 1, characterized in that: In parts by mass: 18 parts of citric acid, 15 parts of oxalic acid, 8 parts of JFC-1 quick penetrant, 5 parts of nonylphenol polyoxyethylene ether, 6 parts of hydroxylamine hydrochloride, and 1.2 parts of stannous chloride.

4. The multi-purpose rust removal cleaning agent according to claim 1, characterized in that: The water is tap water, and the amount of tap water used is 45-51 parts by mass.

5. A method for preparing the multi-purpose rust removing cleaner according to any one of claims 1 to 4, characterized in that: The steps include: Add water and stir, and add citric acid and oxalic acid in sequence during stirring until dissolved; Then add stannous chloride and hydroxylamine hydrochloride and continue stirring until dissolved; Finally, add nonylphenol polyoxyethylene ether and JFC-1 quick penetrant and continue stirring.

6. The method for preparing the multi-purpose rust removing cleaner according to claim 5, characterized in that: In the step of adding citric acid and oxalic acid and stirring until dissolved, the stirring time is 8-12 minutes.

7. The method for preparing the multi-purpose rust removing cleaner according to claim 5, characterized in that: In the step of adding nonylphenol polyoxyethylene ether and JFC-1 quick penetrant and continuing to stir, the stirring time is 50-70 minutes.

8. The method for preparing the multi-purpose rust removing cleaner according to any one of claims 5 to 7, characterized in that: All of the stirring steps are performed without heating, cooling or applying additional pressure.

9. The method for preparing the multi-purpose rust removing cleaner according to claim 8, characterized in that: The stirring speed is 70-80 rpm.

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