Efficient pipeline dredging gel and preparation method thereof

Abstract

The invention relates to the technical field of pipeline cleaning, in particular to powerful dredging gel and a preparation method thereof. The efficient pipeline dredging gel is prepared from the following components in percentage by weight: 1.5 to 15 percent of thickening agent, 2 to 20 percent of alkali metal oxide, 10 to 40 percent of pypocholoride and the balance of solvent, and the thickening agent is prepared by compounding tetradecyl dimethyl amine oxide and sodium metasilicate pentahydrate. According to the invention, through special selection of the thickening agent, the viscosity and the stability of available chlorine are effectively considered, so that the effect of being applied to high-efficiency pipeline dredging for a long storage time is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline cleaning, and more specifically, to a powerful unclogging gel and a preparation method thereof. Background Art

[0002] In daily life, drainage pipes are often clogged due to the accumulation of hair, tea leaves, paper, and kitchen waste. Manual unclogging is time-consuming and labor-intensive, so corresponding pipe unclogging agents have come into being. Their main dosage forms include solid and liquid. Taking the most widely used liquid unclogging agent as an example, it can decompose organic matter that causes pipe blockage through ingredients such as strong alkali and sodium hypochlorite.

[0003] Although the liquid unclogging agent in the related art can effectively decompose the organic matter that causes pipe blockage with the help of strong alkali, sodium hypochlorite and other ingredients, it is limited by its own viscosity. Especially when there are still a small amount of gaps left in the blocked pipe, the low-viscosity pipe unclogging liquid is difficult to stay in the pipe for a long enough time, thereby reducing the action time with the substrate and reducing the cleaning efficiency.

[0004] Therefore, some products increase the efficiency of clearing blockages by unilaterally increasing the proportion of strong alkali or chlorine content, but this will produce more serious side effects, namely corrosion of pipelines, and the corresponding production cost is high, and it is not conducive to environmental protection, so it is gradually abandoned; Or try to increase the viscosity of the product by adding carbomer, cellulose derivatives, magnesium aluminum silicate, inorganic salts and other thickeners, but due to the strong oxidizing properties of chlorine or strong alkali products, the thickener itself is easily oxidized and decomposed or the colloidal structure is destroyed by strong alkali, which leads to product failure. In summary, it is urgent to provide an efficient pipe dredging gel that can effectively take into account viscosity and chlorine content and a preparation method thereof. Summary of the invention

[0005] In order to achieve both high viscosity and high effective chlorine content and ensure the efficient application of the dredging gel in pipe dredging, the present application specifically provides a high-efficiency pipe dredging gel and a preparation method thereof.

[0006] In the first aspect, the present application provides a highly efficient pipe dredging gel, the specific scheme is as follows: A highly efficient pipe dredging gel is composed of the following components in percentage by weight: 1.5-15wt% of a thickener, 2-20wt% of an alkali metal oxide, 10-40% of a hypochlorite, and the remainder being a solvent. The thickener is compounded from tetradecyl dimethyl amine oxide and sodium metasilicate pentahydrate.

[0007] Preferably, the tetradecyl dimethyl amine oxide in the thickener accounts for 1-10wt% of the total amount of the unblocking gel, and the sodium metasilicate pentahydrate accounts for 0.5-5% of the total amount of the unblocking gel.

[0008] Preferably, the solvent is selected from water, ethanol, propylene glycol or a mixture thereof.

[0009] Preferably, the alkali metal oxide is selected from one or more of sodium hydroxide, potassium hydroxide and aluminum hydroxide.

[0010] Preferably, the hypochlorite is selected from one or more of sodium hypochlorite, potassium hypochlorite and calcium hypochlorite.

[0011] Preferably, the effective chlorine content in the hypochlorite is ≧8%.

[0012] Preferably, it is composed of the following components in weight percentage: Tetradecyl dimethyl amine oxide 3-6wt%, sodium hydroxide 4-10wt%, sodium metasilicate pentahydrate 2-5wt%, sodium hypochlorite 10-40%, and the balance is water.

[0013] By adopting the above technical solution, the thickener compounded by tetradecyl dimethylamine oxide and sodium metasilicate pentahydrate can achieve effective thickening in a high-chlorine and high-alkali environment, and the formed high-viscosity gel-like liquid can maintain the stability of viscosity and effective chlorine during the shelf life; The theoretical basis is deduced as follows: tetradecyl dimethylamine oxide and sodium metasilicate pentahydrate can be mixed in a liquid under a strong alkaline environment to form micelles, and the viscosity of the micelle system will increase with the increase of the alkali content or the tetradecyl dimethylamine oxide content. The more micelles there are, the greater the viscosity of the system is, and the formed micelles are not easily destroyed by effective chlorine, thereby maintaining the stability of the viscosity.

[0014] In addition, the sodium metasilicate pentahydrate used in the thickener can not only further enhance the stability of the effective chlorine, thereby ensuring the decomposition effect of the strong alkali + effective chlorine formula system, but also passivate the steel pipes and form a protective film to reduce corrosion and damage to the steel pipes.

[0015] In the second aspect, the present application provides a method for preparing an efficient pipe dredging gel, and the specific preparation steps and process conditions are as follows: S1. First, add tetradecyl dimethyl amine oxide into water and stir to form an initial mixture; S2, adding sodium metasilicate pentahydrate and sodium hydroxide in corresponding weight ratios to the initial mixture formed in S1 under continuous stirring; S3. When the material temperature in S2 is ≤40°C, add sodium hypochlorite to obtain the pipe unclogging gel.

[0016] Preferably, the S3 is cooled by passing water through a jacket to control the temperature of the material in S2 to drop below 40° C. within 45 minutes.

[0017] By adopting the above technical solution, the preparation conditions and process are significantly simplified, no additional reagents or special equipment are required, and the obtained product has stable and uniform performance, which can effectively take into account the product viscosity and then the effective chlorine content, thereby ensuring the dredging efficiency and service life of the product; In addition, the above preparation process does not involve additional reagents and basically no by-products and / or wastes are generated, so it is a green and efficient daily chemical product, which is conducive to responding to environmental protection policies at this stage. In addition to being used to dredge pipes, the product can also be used for the degradation and treatment of domestic waste.

[0018] In the third aspect, the present application provides a composite thickener for a strong oxidizing environment, which is compounded by tetradecyl dimethyl amine oxide and sodium metasilicate pentahydrate. The composite thickener can be used in any product field containing strong alkali, hypochlorite, etc. with a strong oxidizing environment, including but not limited to unclogging gel, disinfectant, etching agent, etc.

[0019] In summary, this application has the following beneficial effects: 1. The present application effectively takes into account the stability of viscosity and effective chlorine by selecting tetradecyl dimethylamine oxide and sodium metasilicate pentahydrate, thereby achieving the effect of long storage time and efficient dredging of pipelines. In addition, thanks to the selection of components, it is not easy to corrode metal pipelines; 2. The thickener in the present application can be mixed in a liquid under a strong alkaline environment to form stable micelles. The viscosity of the micellar system increases with the increase of the alkali content and / or the content of tetradecyl dimethyl amine oxide. The more micelles there are, the more easily the micelles are destroyed by effective chlorine. 3. The sodium metasilicate pentahydrate selected in this application can not only further enhance the stability of effective chlorine and the decomposition effect of the formula system, but also passivate the steel pipe and form a protective film to reduce corrosion and damage to the steel pipe; 4. The preparation conditions and process of the present application are significantly simplified, and no additional reagents or special equipment are required. The obtained product is green, pollution-free, and has stable and uniform performance. It can effectively take into account the product viscosity and then the effective chlorine content, thereby ensuring the dredging efficiency and service life of the product; 5. The composite thickener in this application can be used not only in the unclogging gel listed in this application, but also in any product field containing strong alkali, hypochlorite and the like with a strong oxidizing environment, including but not limited to unclogging gel, disinfectant, etching agent and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a sample picture of the pipe unclogging gel developed in Example 1 of the present application; Figure 2 This is a diagram showing the effect of the pipe unclogging gel on hair corrosion in Example 1 of the present application; Figure 3 This is a diagram showing the corrosion effect of the pipe cleaning gel on solid grease in Example 1 of the present application; Figure 4 This is a diagram showing the corrosion effect of the pipe unclogging gel on vegetable leaves in Example 1 of the present application. DETAILED DESCRIPTION

[0021] The following is combined with the embodiment and Figure 1-4 This application is described in further detail.

[0022] Performance testing The pipe dredging gel prepared in each embodiment and comparative example was selected for testing, and the specific testing items, reference standards and steps are as follows: 1) Viscosity test The viscosity of the pipe cleaning gel was tested using a NDJ-5S digital viscometer (Shanghai Hengping Instrument Factory). The test conditions were: room temperature, 2# rotor, and a rotation speed of 12 rpm.

[0023] 2) Stability of available chlorine content (accelerated aging test - one year) The effective chlorine content was tested using the content determination method 2.2.1.2 of the Disinfection Technical Specifications (2002), and the change in effective chlorine content was tested in a 54°C incubator within 14 days; The 54°C, 14-day accelerated test is carried out by using the accelerated test sample in reference to 2.1.11.3.4 Stability Test Method 2). The change in the effective chlorine content is equivalent to being stored at room temperature for at least 1 year.

[0024] 3) Degradation effect 3.1 Digestion effect on green leaves: Cut fresh green leaves into small pieces of 2cm*2cmm, weigh 5g of the cut leaves and place them in a 100ml glass measuring cylinder, slowly inject 100ml of pipe cleaning gel, and examine the digestion effect of pipe cleaning gel on the leaves after overnight. 3.2 Digestion of solid fats and oils; Weigh 5g of solid fat mixed with butter and lard, put it in a 200ml beaker, slowly inject 100ml pipe cleaning gel, stir with a glass rod, and observe the digestion effect of pipe cleaning gel on solid fat; 3.3 Digestive effect on hair: Weigh 1g of hair and put it in a 200ml beaker. Slowly inject 100ml of pipe cleaning gel, let it stand, start timing, and observe the time it takes for the hair to be completely digested. The degradation effect was evaluated according to the following criteria: good, relatively good, average, relatively poor, and no effect. The lowest degradation effect on green leaves, solid oils, and hair was recorded.

[0025] 4) Anti-corrosion - Evaluation of the corrosion of strong pipe cleaning powder to related materials This method is to judge the corrosiveness of the powerful pipe cleaner by testing the corrosion of the relevant materials, and refers to the methods of corrosion experiments in "QBT2117-1995 (2017) General Water-based Metal Cleaner" and "Disinfection Technical Specifications (2002 Edition)".

[0026] The specific test steps and conditions are as follows: Take a 10% solution of strong pipe cleaner, soak the material to be tested in the solution, and measure the mass change of the material before and after soaking to judge the corrosiveness.

[0027] Test material requirements Experimental materials: PVC pipe (cut 10-20 mm small sections from the PVC pipe), Z30 cast iron sheet (50 mm*25 mm*3-6 mm), 321 stainless steel sheet (50 mm*25 mm*3-6 mm); Test concentration and action time: 10% unblocking gel, action time 15h Operation steps and equipment: 250ml beaker, analytical balance (sensitivity 0.1mg), constant temperature water bath, S-shaped hook, thermometer 0-100℃ graduation 1℃, timer, specimen rack, glass rod.

[0028] Reagents: anhydrous ethanol, deionized water.

[0029] Test operation steps: a) Pour 20g of pipe gel into three beakers respectively, add water to make up to 200g, and stir to dissolve; b) Hang the test piece on an S-shaped hook and rinse it with deionized water for 30 seconds, then soak it in anhydrous ethanol for 5 minutes, take it out, blow it dry with hot air and weigh it; c) At room temperature, hang the test piece on a glass rod placed horizontally at the mouth of a beaker, so that the test piece is completely immersed in the liquid (without the upper surface exposed and the lower part not touching the bottom). Only two test pieces of the same material are placed in each beaker; d) After 15 hours, take out the test pieces, rinse each piece with deionized water for 30 seconds, soak it in anhydrous ethanol for 1 minute to dehydrate, blow dry with hot air and weigh it; e) Calculate the mass change rate. The result of each test piece is the average of the results of the two test pieces: Where: m1—weight of the test piece before the experiment; m2—weight of the test piece after the experiment; x—Rate of change of mass.

[0030] The quality change rate is <0.5%, which is qualified.

[0031] Examples 1-5 A highly efficient pipe dredging gel, the components and their corresponding weights (kg) of which are shown in the following table, is prepared by the following preparation process: S1. First, tetradecyl dimethyl amine oxide is added into solvent water, and stirred to form an initial mixture; S2, adding sodium metasilicate pentahydrate and alkali metal oxide in corresponding weight ratios to the initial mixture formed in S1 under continuous stirring, wherein the alkali metal oxide is sodium hydroxide; S3, through the jacket water cooling process, control the material in S2 to drop below 40°C within 45 minutes, add hypochlorite, specifically sodium hypochlorite, to obtain the pipe unclogging gel.

[0032] Table: Components and their weights in Examples 1-5 (kg) Comparative Example 1 A pipe dredging gel, which differs from Example 1 in that, except that the thickener is replaced by an equal amount of carbomer, the other components are the same and are prepared by the following process: S1. First, add carbomer into solvent water and stir to form an initial mixture; S2, adding alkali metal oxides in corresponding weight ratios to the initial mixture formed in S1 under continuous stirring, wherein the alkali metal oxide is sodium hydroxide; S3, through the jacket water cooling process, control the material in S2 to drop below 40°C within 45 minutes, add hypochlorite, specifically sodium hypochlorite, to obtain the pipe unclogging gel.

[0033] Comparative Example 2 A pipe unclogging gel, which differs from Example 1 in that, except that the thickener is replaced by an equal amount of carboxymethyl cellulose, the other components are the same and are prepared by the following process: S1. First, carboxymethyl cellulose is added into solvent water and stirred to form an initial mixture; S2, adding alkali metal oxides in corresponding weight ratios to the initial mixture formed in S1 under continuous stirring, wherein the alkali metal oxide is sodium hydroxide; S3, through the jacket water cooling process, control the material in S2 to drop below 40°C within 45 minutes, add hypochlorite, specifically sodium hypochlorite, to obtain the pipe unclogging gel.

[0034] Comparative Example 3 A pipe unclogging gel, which differs from Example 1 in that, except that the thickener is replaced by an equal amount of dodecyl dimethyl amine oxide, the other components are the same; And it is prepared by the following process: S1. First, add dodecyl dimethyl amine oxide into solvent water and stir to form an initial mixture; S2, adding alkali metal oxides in corresponding weight ratios to the initial mixture formed in S1 under continuous stirring, wherein the alkali metal oxide is sodium hydroxide; S3, through the jacket water cooling process, control the material in S2 to drop below 40°C within 45 minutes, add hypochlorite, specifically sodium hypochlorite, to obtain the pipe unclogging gel.

[0035] Comparative Example 4 A pipe dredging gel, which differs from Example 1 in that, except that the thickener does not contain sodium metasilicate pentahydrate, the other components are the same and are prepared by the following process: S1. First, tetradecyl dimethyl amine oxide is added into solvent water, and stirred to form an initial mixture; S2, adding alkali metal oxides in corresponding weight ratios to the initial mixture formed in S1 under continuous stirring, wherein the alkali metal oxide is sodium hydroxide; S3, through the jacket water cooling process, control the material in S2 to drop below 40°C within 45 minutes, add hypochlorite, specifically sodium hypochlorite, to obtain the pipe unclogging gel.

[0036] The pipe cleaning gels in the above Examples 1-5 and Comparative Examples 1-4 were extracted, and their viscosity (Mpa·s), stability of effective chlorine content (%), degradation effect (%) and corrosion resistance (%) were tested respectively according to the above measurement steps, and the test results were recorded in the following table.

[0037] Table: Performance test results of Examples 1-5 and Comparative Examples 1-3 As can be seen from the above table, the unclogging gel in Examples 1-5 effectively takes into account the stability of viscosity and effective chlorine content, and its viscosity can reach up to 1500Mpa·s, and its effective chlorine content after one year is above 60%, and it can still be effectively used for unclogging degradation, and is not easy to cause corrosion to metal pipes; In summary, it can be seen from the data of each embodiment that it is improved to varying degrees compared with Comparative Examples 1-4. The reasons may be as follows: 1) The present application effectively takes into account the stability of viscosity and effective chlorine through the selection of tetradecyl dimethyl amine oxide and sodium metasilicate pentahydrate, thereby achieving the effect of long storage time for efficient dredging of pipelines. In addition, thanks to the selection of components, it is not easy to cause corrosion to metal pipelines.

[0038] 2) The thickener in the present application can be mixed in a liquid under a strong alkaline environment to form stable micelles. The viscosity of the micellar system increases with the increase of the alkali content and / or the content of tetradecyl dimethyl amine oxide. The more micelles there are, the more easily the micelles are destroyed by effective chlorine. Therefore, in Comparative Example 1 using carbomer as an equal replacement, Comparative Example 2 using carboxymethyl cellulose as an equal replacement, and Comparative Example 3 using dodecyl dimethyl cellulose as an equal replacement, the effective chlorine content after simulating one year is basically reduced to 0%, and no longer has the corresponding degradation effect, and under the conditions of strong alkali and strong oxidation, an effective thickening system cannot be formed.

[0039] 3) The sodium metasilicate pentahydrate selected in the present application can not only further enhance the stability of the effective chlorine and the decomposition effect of the formula system, but also passivate the steel pipe and form a protective film to reduce the corrosion and damage to the steel pipe. Therefore, after the comparative example 4 lacks this component, the corresponding performance is reduced, and its effective chlorine content is as low as 26%, and it no longer meets the corrosion resistance requirements.

[0040] In addition, it can be seen from Examples 1-5 that the high-efficiency pipe unclogging gel is preferably composed of the following components in weight percentage: 3-6wt% of tetradecyl dimethyl amine oxide, 4-10wt% of sodium hydroxide, 2-5wt% of sodium metasilicate pentahydrate, 10-40% of sodium hypochlorite, and the balance is water.

[0041] The adjustment of the dosage of any component within the above range can meet the product's consideration of viscosity, service life and degradation effect, and taking Examples 4-5 as preferred examples, the viscosity and service life can be adaptively adjusted by the corresponding thickener dosage and ratio, thereby significantly ensuring its application scenario; The obtained composite thickener can be applied to the unclogging gel listed in this application, and can also be applied to any product field containing strong alkali, hypochlorite, etc. with a strong oxidizing environment, including but not limited to unclogging gel, disinfectant, etching agent, etc. Other similar scenarios not used or listed in this application that do not require creative association should not be regarded as limitations on this application.

[0042] In addition, it can be seen from each embodiment 1-5 that the preferred preparation conditions and processes are as follows: S1. First, add tetradecyl dimethyl amine oxide into water and stir to form an initial mixture; S2, adding sodium metasilicate pentahydrate and sodium hydroxide in corresponding weight ratios to the initial mixture formed in S1 under continuous stirring; S3, through the jacket water cooling process, control the material in S2 to drop below 40°C within 45 minutes, add sodium hypochlorite, and obtain the pipeline unclogging gel.

[0043] It is obvious that while the above process is significantly simplified, the overall preparation process does not require additional reagents or special equipment, is relatively low in energy consumption and pollution-free, and the prepared unclogging gel has stable performance, and can effectively take into account the product viscosity, degradation effect and service life.

[0044] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A highly efficient pipe dredging gel, characterized in that: The invention is composed of the following components in weight percentage: 1.5-15wt% thickener, 2-20wt% alkali metal oxide, 10-40% hypochlorite and the balance is solvent. The thickener is compounded by tetradecyl dimethyl amine oxide and sodium metasilicate pentahydrate.

2. The high-efficiency pipe dredging gel according to claim 1, characterized in that: The tetradecyl dimethyl amine oxide in the thickener accounts for 1-10wt% of the total amount of the unblocking gel; Sodium metasilicate pentahydrate accounts for 0.5-5% of the total amount of the unblocking gel.

3. The high-efficiency pipe dredging gel according to claim 1, characterized in that: The solvent is selected from water, ethanol, propylene glycol or a mixture thereof.

4. The high-efficiency pipe dredging gel according to claim 1, characterized in that: The alkali metal oxide is selected from one or more of sodium hydroxide, potassium hydroxide and aluminum hydroxide.

5. The high-efficiency pipe dredging gel according to claim 1, characterized in that: The hypochlorite is selected from one or more of sodium hypochlorite, potassium hypochlorite and calcium hypochlorite.

6. The high-efficiency pipe dredging gel according to claim 5, characterized in that: The effective chlorine content in the hypochlorite is ≧8%.

7. The high-efficiency pipe dredging gel according to any one of claims 1 to 6, characterized in that: It is composed of the following components in weight percentage: Tetradecyl dimethyl amine oxide 3-6wt%, sodium hydroxide 4-10wt%, sodium metasilicate pentahydrate 2-5wt%, sodium hypochlorite 10-40%, and the balance is water.

8. The method for preparing the high-efficiency pipe dredging gel according to claim 7, characterized in that: The specific preparation steps and process conditions are as follows: S1. First, add tetradecyl dimethyl amine oxide into water and stir to form an initial mixture; S2, adding sodium metasilicate pentahydrate and sodium hydroxide in corresponding weight ratios to the initial mixture formed in S1 under continuous stirring; S3. When the material temperature in S2 is ≤40°C, add sodium hypochlorite to obtain the pipe unclogging gel.

9. According to the method for preparing the efficient pipe dredging gel of claim 8, the S3 is cooled by passing water through a jacket to control the temperature of the material in S2 to drop below 40°C within 45 minutes.

10. A composite thickener for use in a strong oxidizing environment, characterized in that: It is compounded by tetradecyl dimethyl amine oxide and sodium metasilicate pentahydrate.

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