Pipeline dredging agent composition without alkali metal hydroxide and preparation method of pipeline dredging agent composition

Abstract

The invention provides a pipeline dredging agent composition without alkali metal hydroxide. The pipeline dredging agent composition is prepared from the following components in percentage by mass: 0.1 to 20 percent of surfactant, 1 to 10 percent of sulfhydryl compound, 1 to 5 percent of modified xanthan gum, 5 to 25 percent of inorganic salt, 0.1 to 8 percent of thickening agent, 1 to 10 percent of synergist and the balance of water, wherein the modified xanthan gum is obtained by grafting carboxylated xanthan gum with acid activated attapulgite and then crosslinking with glutaraldehyde. The modified xanthan gum combines the characteristics of the attapulgite, can physically adsorb and destroy blockages, greatly improves the thickening and mechanical stability, has a high-stability three-dimensional network structure, can load active substances, and can maintain the overall stability of a system and prolong the contact time of the dredging agent and the blockages while decomposing the blockages, so that the dredging agent has a good dredging effect. The dredging effect is improved. In addition, the stable cross-linked network and the thickening agent cooperate, an adhesion layer can be formed on the inner wall of the pipeline, and the corrosion risk of the metal pipeline is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of daily chemical washing, and particularly relates to a pipeline dredging agent composition without alkali metal hydroxides and a preparation method thereof. Background Art

[0002] In daily life and industrial production, the pipeline system plays a crucial role, undertaking the task of transporting various fluids such as water, sewage, and chemical substances. However, with the increase in the usage time, the problem of pipeline blockage frequently occurs, bringing many inconveniences and troubles to people's life and production. Therefore, as a key product to solve the problem of pipeline blockage, the market demand for pipeline dredging agents is increasing day by day.

[0003] At present, there are various types of pipeline dredging agents on the market, but most traditional pipeline dredging agents contain alkali metal hydroxides, such as sodium hydroxide and potassium hydroxide. These alkali metal hydroxides have strong alkalinity and corrosiveness, and can chemically react with blockages such as grease, hair, and dirt in the pipeline, so as to achieve the purpose of dissolution and dredging. However, this strong corrosiveness also brings a series of serious problems.

[0004] From the perspective of the pipeline itself, alkali metal hydroxides will cause varying degrees of damage to pipelines of various materials. For metal pipelines, such as iron pipes and copper pipes, strong alkaline substances will chemically react with the metal, resulting in rust and corrosion on the inner wall of the pipeline, thus shortening the service life of the pipeline. Long-term use of a dredging agent containing alkali metal hydroxides may cause problems such as perforation and leakage of the pipeline, which not only requires a large amount of funds for repair and replacement, but also may cause pollution to the surrounding environment. For plastic pipelines, although plastics have certain corrosion resistance compared to metals, strong alkalis may still erode certain plastic materials, affecting the structural strength and sealing performance of the pipeline.

[0005] In terms of use safety, alkali metal hydroxides are extremely harmful to the human body. During use, if accidentally contacted with the skin or eyes, it will immediately cause strong irritation and burns, and may even cause permanent damage in severe cases. Moreover, when pouring the dredging agent into the pipeline, splashing may occur, increasing the risk for users to come into contact with dangerous substances. In addition, alkali metal hydroxides will release a large amount of heat when mixed with water, which may cause the solution to boil and splash, further exacerbating the safety hazard.

[0006] From the perspective of environmental protection, pipeline dredging agents containing alkali metal hydroxides will cause serious pollution to water bodies and soil after being discharged into the environment. Strong alkaline wastewater will change the pH value of the water body, destroy the living environment of aquatic organisms, and cause a large number of aquatic organisms to die. At the same time, when alkaline substances enter the soil, they will affect the pH value and fertility of the soil, inhibit the growth of plants, and destroy the ecological balance.

[0007] In addition to the above problems, traditional pipe cleaners also have certain limitations in terms of cleaning effect. For some stubborn blockages, such as mixtures of hair, grease, and dirt, alkali metal hydroxides may not be able to completely dissolve and remove them, and multiple uses are required to achieve a certain cleaning effect. This not only increases the usage cost but may also cause more serious damage to the pipes.

[0008] In summary, developing a pipe cleaner without alkali metal hydroxides, which is safe, environmentally friendly, and efficient, has important practical significance and broad market prospects. Summary of the Invention

[0009] The object of the present invention is to overcome the defects of strong corrosiveness, low safety, and environmental pollution existing in traditional pipe cleaners containing alkali metal hydroxides in the prior art, and to provide a pipe cleaner composition without alkali metal hydroxides that can effectively dissolve various blockages and is safe and environmentally friendly. Another object of the present invention is to provide a preparation method of a pipe cleaner composition without alkali metal hydroxides.

[0010] One object of the present invention is to provide a pipe cleaner composition without alkali metal hydroxides, comprising the following components in mass fractions:

[0011]

[0012] Among them,

[0013] The modified xanthan gum is obtained by grafting carboxylated xanthan gum with acid-activated attapulgite and then cross-linking with glutaraldehyde.

[0014] Furthermore, the sum of the mass fractions of each component is 100%.

[0015] Furthermore, the surfactant is selected from one or more of anionic surfactants, nonionic surfactants, or zwitterionic surfactants.

[0016] Furthermore, the anionic surfactant is selected from one or more of alkylbenzene sulfonates or α-olefin sulfonates; the nonionic surfactant is fatty alcohol polyoxyethylene ether; and the zwitterionic surfactant is cocamidopropyl betaine. Anionic surfactants such as alkylbenzene sulfonates, by virtue of their unique molecular structure, have a lipophilic alkyl chain at one end that can penetrate deep into the oil and bind to it, and a hydrophilic sulfonate group at the other end that can emulsify and disperse the oil in water, thereby effectively removing grease blockages in pipes. α-olefin sulfonates also possess excellent detergency and can function stably in a variety of complex environments. The fatty alcohol polyoxyethylene ethers in the nonionic surfactants have good water solubility due to the polyoxyethylene chains in their molecules that can form hydrogen bonds with water molecules. At the same time, the lipophilic fatty alcohol groups can interact with non-polar substances such as oils and fats, helping to enhance the emulsification and dispersion of various types of dirt in pipe cleaning agents. Cocamidopropyl betaine, a typical representative of zwitterionic surfactants, can exhibit good surface activity under different pH environments. It has some characteristics of cationic surfactants and the functions of anionic surfactants. It can synergize with other surfactants and has minimal irritation to the skin and pipes.

[0017] Furthermore, the sulfhydryl compound is selected from one or more of mercaptoacetic acid, mercaptopropionic acid, mercaptobutyric acid, mercaptocarboxylates, mercaptoethanol, mercaptopropanol, or mercaptoethylamine. These sulfhydryl compounds all contain a highly reactive sulfhydryl group (-SH). Taking thioglycolic acid as an example, it can chemically react with keratin in hair. Keratin is the main component of hair and contains a large number of disulfide bonds. The sulfhydryl group of thioglycolic acid can break the disulfide bonds in keratin, destroying the structure of hair, thereby achieving the effect of softening and dissolving hair, effectively solving the problem of blockage caused by hair accumulation in pipelines. Other sulfhydryl compounds also play an important role in dissolving hair blockages in pipeline dredging based on similar chemical reaction principles.

[0018] Furthermore, the inorganic salt is selected from one or more of sodium chloride, potassium chloride, calcium chloride, potassium sulfate, magnesium sulfate, sodium carbonate, sodium phosphate or sodium sulfate. Taking sodium chloride as an example, in pipe cleaning agents, it can adjust the ionic strength of the solution, affecting the activity and interaction of the various components in the solution. When an appropriate amount of sodium ions and chloride ions are present in the solution, the micellar morphology and stability of the surfactant can be changed, allowing it to better perform its decontamination and emulsification functions. At the same time, some inorganic salts such as calcium chloride have certain hygroscopicity, which can maintain the humidity of the pipe cleaning agent to a certain extent, facilitating the progress of some chemical reactions. Sodium carbonate can be hydrolyzed in water, making the solution alkaline, which helps the hydrolysis reaction of grease-based substances, breaking down grease into water-soluble fatty acid salts and glycerol, thereby achieving the purpose of removing greasy blockages.

[0019] Furthermore, the thickener is selected from one or more of sodium carboxymethyl cellulose (CMC), methyl cellulose (MC), hydroxypropyl methyl cellulose (HPMC), or guar gum locust bean gum. Sodium carboxymethyl cellulose (CMC) is a commonly used thickener that can form a uniform colloidal solution in water. The carboxymethyl groups on its molecular chain can interact with water molecules, binding the water molecules around the molecule through hydrogen bonds and electrostatic interactions, increasing the viscosity of the solution. In a pipe clog remover, the thickened solution can better adhere to the pipe wall, extend the action time, ensure sufficient contact between the clog remover and the blockage, and improve the dredging effect. Guar gum is a natural polysaccharide extracted from guar beans, which can rapidly swell in water to form a solution with high viscosity. Its thickening effect is remarkable, and it has good compatibility with other components, which can synergistically improve the comprehensive performance of the pipe clog remover.

[0020] Furthermore, the synergist is selected from one or more of pyrrolidone compounds or amide compounds; the pyrrolidone compounds include N-methyl-2-pyrrolidone (NMP), N-ethyl-2-pyrrolidone (NEP), N-vinyl-2-pyrrolidone (NVP); the amide compounds include dimethylformamide (DMF), dimethylacetamide (DMAc). Taking N-methyl-2-pyrrolidone (NMP) as an example, it has good solubility, can fully dissolve other components in the pipe clog remover to form a uniform and stable system. At the same time, NMP can produce a synergistic effect with components such as sulfides in some cases, enhancing the dissolution and decomposition ability of some special blockages. Dimethylformamide (DMF) is also an excellent solvent, which has good solubility for a variety of organic and inorganic compounds, and can promote the reaction between various components in the pipe clog remover, improving the overall effect of the clog remover.

[0021] Another object of the present invention is to provide a preparation method of the above pipe clog remover composition without alkali metal hydroxide, including the following steps:

[0022] S1. Blend xanthan gum, potassium carbonate, and methyl bromoacetate, stir and react, then adjust the pH to acidic, add water and ethanol, heat and react, and purify to obtain carboxylated xanthan gum;

[0023] S2. Blend the carboxylated xanthan gum with acid-activated attapulgite, heat and react to obtain attapulgite-grafted xanthan gum;

[0024] S3. Dissolve the attapulgite-grafted xanthan gum in a solvent, adjust the pH to acidic, add glutaraldehyde, stir and react to obtain modified xanthan gum;

[0025] S4. Add water into the reaction vessel. Under stirring, add inorganic salts and stir evenly; add a surfactant and stir evenly; add a mercapto compound and stir evenly; add a thickener and stir evenly; add modified xanthan gum and stir evenly; add a synergist and stir evenly to obtain a pipeline dredging agent composition without alkali metal hydroxides.

[0026] Further, in step S1, the mass ratio of the xanthan gum, potassium carbonate and methyl bromoacetate is 1:(0.5 - 2.5):(1 - 3); the heating temperature is 90 - 120 °C.

[0027] Further, in step S2, the mass ratio of the carboxylated xanthan gum to the acid-activated attapulgite is 1:(0.1 - 0.5); the heating temperature is 60 - 80 °C.

[0028] Further, in step S3, the mass ratio of the attapulgite-grafted xanthan gum to glutaraldehyde is (10 - 30):1.

[0029] The present invention has the following beneficial effects:

[0030] (1) The xanthan gum of the present invention reacts with methyl bromoacetate after being treated with potassium carbonate, introducing a methyl ester structure. Through heating and hydrolysis, the methyl ester is converted into a carboxyl group to form carboxylated xanthan gum, significantly increasing the chemical activity of xanthan gum. Subsequently, through the reaction of the carboxyl group with the hydroxyl group on the surface of the acid-activated attapulgite, grafting of attapulgite and xanthan gum is achieved. Further, glutaraldehyde is used to crosslink the attapulgite-grafted xanthan gum to construct a three-dimensional network structure to form modified xanthan gum. This modified xanthan gum combines the high specific surface area and adsorption capacity of attapulgite, can physically adsorb blockages such as grease and hair, and at the same time can also destroy the dense structure of the blockage through the physical friction of attapulgite, accelerating the shedding of the blockage; on the other hand, with attapulgite as the core, the crosslinked network constructed by this modified xanthan gum not only greatly improves the thickening performance and mechanical stability of the modified xanthan gum, but also can load active substances such as mercapto compounds through hydrogen bonds. It is weakly acidic as a whole. During application, when it comes into contact with the blockage, as the pH increases, the outer structure rapidly collapses, releasing active substances and quickly decomposing the blockage. The existence of the crosslinked network and the function of inorganic salts to adjust the ionic strength also enable the pipeline dredging agent composition to maintain the overall stability of the system, extend the contact time between the dredging agent and the blockage, and improve the dredging effect. In addition, the modified xanthan gum has a stable crosslinked network structure and there are many hydrogen bonds on the surface, which can cooperate with the thickener to form a uniform and stable adhesion layer on the inner wall of the pipeline, protecting the metal pipeline and reducing the corrosion risk of traditional strongly alkaline dredging agents to the metal pipeline.

[0031] (2) Compared with traditional pipe cleaners containing alkali metal hydroxides, the pipe cleaner composition without alkali metal hydroxides of the present invention avoids the safety hazards brought by strong corrosiveness, has little irritation to pipes, the skin and eyes of users, etc., and greatly reduces the probability of dangerous situations such as burns caused by contact during use. At the same time, it reduces environmental pollution and will not change the pH value and damage the ecological balance after being discharged into water bodies and soil like traditional products, which is conducive to environmental protection and ecological sustainable development. Among them, mercaptoacetic acid mainly reacts with the hair in the pipe. The main component of hair is keratin, which contains a large number of disulfide bonds. Mercaptoacetic acid contains a strongly reactive mercapto group (-SH), and its reaction mechanism is that the mercapto group of mercaptoacetic acid can break the disulfide bonds in keratin. Through the reaction of mercaptoacetic acid with keratin in hair, it can specifically dissolve common hair blockages in pipes. Acting synergistically with other components, it can effectively dissolve various blockages such as hair, grease, and dirt. Whether it is the blockage of common kitchen pipes caused by grease and food residues or the blockage of bathroom pipes caused by hair and soap scale, it can show good dredging effects, and has good stability, and can maintain effective action in the pipe for a long time without performance degradation due to too long storage time or complex environmental factors in the pipe. The synergistic effect of the synergist and other components further improves the dissolution and decomposition ability of blockages, enhances the dredging effect, and provides a more efficient, safer and more environmentally friendly solution to solve the problem of pipe blockage. Detailed implementation manners

[0032] In order to more clearly illustrate the technical solutions of the present invention, the following examples are listed. The raw materials, reactions and post-treatment means appearing in the examples are all common raw materials on the market and technical means well-known to those skilled in the art, unless otherwise specified.

[0033] The terms "preferred", "preferably", "more preferred", etc. in the present invention refer to embodiments of the present invention that can provide certain beneficial effects in certain cases. However, in the same case or other cases, other embodiments may also be preferred. In addition, the description of one or more preferred embodiments does not imply that other embodiments are not available, nor is it intended to exclude other embodiments from the scope of the present invention.

[0034] It should be understood that, except in any operating example or otherwise indicated, all numbers representing the amounts of ingredients or otherwise used in the specification and claims should be understood to be modified in all instances by the term "about". Therefore, unless otherwise indicated, the numerical parameters set forth in the following specification and appended claims are approximations that vary depending upon the desired properties sought to be obtained by the present invention.

[0035] The present invention uses the following raw materials:

[0036] Surfactants: Alkylbenzene sulfonates and fatty alcohol polyoxyethylene ethers are mixed in a ratio of 1:1, both of industrial grade, and are purchased from Zhejiang Sunyu Technology Co., Ltd. and BASF Chemical Co., Ltd. respectively.

[0037] Mercapto compounds: Mercaptoacetic acid, industrial grade, is purchased from Shandong Aite Chemical Co., Ltd.

[0038] Inorganic salts: Sodium chloride, food grade, is a common product in the market.

[0039] Thickening agents: Sodium carboxymethyl cellulose (CMC), industrial grade, from Guangdong Mingcheng Biotechnology Co., Ltd.

[0040] Synergists: N-Methyl-2-pyrrolidone (NMP), industrial grade, from Shandong Ruifeng New Materials Co., Ltd.

[0041] Xanthan gum: Purchased from Jiangsu Yuanyuan Biotechnology Co., Ltd.

[0042] Attapulgite: Purchased from Mingguang Yida Attapulgite Technology Co., Ltd.

[0043] The preparation method of acid-activated attapulgite includes the following steps:

[0044] Immerse the attapulgite in a hydrochloric acid aqueous solution (10wt%), stir and react at 80°C for 2h, filter, wash the filter residue with water until the pH is 6, then place it in an oven, dry at 105°C for 12h, and grind through a 325-mesh standard sieve to obtain acid-activated attapulgite.

[0045] All the water in the present invention is deionized water, self-made in the laboratory.

[0046] According to the components and mass fractions in Table 1, the pipe clog remover compositions without alkali metal hydroxides of Examples 1-3 are prepared respectively.

[0047] Table 1 Mass fractions of each component of the pipe clog remover compositions of Examples 1-3

[0048]

[0049] The preparation method of the above pipe clog remover composition without alkali metal hydroxides includes the following steps:

[0050] S1. Using N,N-dimethylformamide as a solvent, add xanthan gum and stir for 1 h. Then add potassium carbonate and stir for 1 h. Next, add methyl bromoacetate (xanthan gum: potassium carbonate: methyl bromoacetate = 1:2:2, m / m / m), stir and react for 10 h. Then adjust the pH to 3 with hydrochloric acid aqueous solution (1 M), remove the solvent, wash and dry. Then add water and ethanol (water: ethanol = 4:1, v / v; the added amount is 50 times the mass of xanthan gum), react at 110 °C for 18 h, remove the solvent, wash and dry to obtain carboxylated xanthan gum;

[0051] S2. Using ethanol as a solvent, blend the carboxylated xanthan gum with acid-activated attapulgite (carboxylated xanthan gum: acid-activated attapulgite = 1:0.1, m / m), react at 80 °C for 2 h, wash, filter and dry to obtain attapulgite-grafted xanthan gum;

[0052] S3. Using water as a solvent, add the attapulgite-grafted xanthan gum and stir to disperse it evenly. Adjust the pH to 4 with hydrochloric acid aqueous solution (1 M), add glutaraldehyde (attapulgite-grafted xanthan gum: glutaraldehyde = 20:1, m / m), stir and react for 8 h. After the reaction is completed, adjust the pH to 7 with sodium hydroxide aqueous solution (3 M), then precipitate the product with 80% ethanol and wash and dry to obtain modified xanthan gum;

[0053] S4. According to the above mass fractions, add water to the reaction kettle. Under the stirring state of 150 r / min, slowly add inorganic salts and continuously stir for 30 min to ensure that sodium chloride is completely dissolved; slowly add surfactants and increase the stirring speed to 300 r / min, stir for 45 min to make the surfactants evenly dispersed in the solution; add mercapto compounds, keep the stirring speed at 300 r / min, and continue to stir for 30 min to fully mix mercaptoacetic acid evenly; add thickeners, adjust the stirring speed to 200 r / min, and stir for 60 min to thicken the solution to an appropriate viscosity. During this period, observe the state of the solution to ensure uniform thickening; add modified xanthan gum and stir for 60 min; finally add synergists and stir at a speed of 250 r / min for 40 min to fully mix all components evenly to obtain a pipe dredging agent composition without alkali metal hydroxides. Filter the prepared pipe dredging agent composition without alkali metal hydroxides to remove possible impurities, and then pack it into a sealed container for standby.

[0054] Comparative Example 1

[0055] A pipe dredging agent composition without alkali metal hydroxides. The difference between this comparative example and Example 3 is that step S3 is not carried out, and the attapulgite-grafted xanthan gum obtained in step S2 is used as the modified xanthan gum, and the usage amounts of other components and the preparation method are the same as those in Example 3.

[0056] Comparative Example 2

[0057] A pipe clog remover composition without alkali metal hydroxide. The difference between this comparative example and Example 3 is that steps S1 - S2 are not carried out. In step S3, the attapulgite grafted xanthan gum is replaced with xanthan gum in equal mass, and the dosages of other components and the preparation method are the same as those in Example 3.

[0058] Test Example 1: Clog removal effect test

[0059] The pipe clog remover compositions of Examples 1 - 3 and Comparative Examples 1 - 2 were tested for clog removal effect.

[0060] Test method: Prepare 5 groups of simulated clogged pipes, each group consisting of 3 PVC pipes with an inner diameter of 50 mm and a length of 500 mm, filled with an equal amount of a mixture of hair, grease, and dirt (the hair is real human hair cut into pieces, the grease is common edible oil, and the dirt is a mixture of kitchen dust and a small amount of soil).

[0061] The pipe clog remover compositions of Examples 1 - 3 and Comparative Examples 1 - 2 were respectively poured into the corresponding simulated clogged pipes, with a pouring amount of 200 mL each. The pipes were kept vertical and static for 30 min to allow the clog remover to act fully.

[0062] After 30 min, water with a pressure of 0.2 MPa was injected into the pipes using a pressure pump and flushed for 10 min. Observe and record the clog removal situation of the pipes. The clog removal effect is divided into three grades: completely unclogged (no clogging residues in the pipe, water flows smoothly), partially unclogged (there are still a small amount of clogging residues in the pipe, but water can pass through), and not unclogged (the clogging in the pipe is basically not reduced, and water cannot pass through). Calculate the complete unclogging rate of each group of simulated clogged pipes. The complete unclogging rate = (the number of completely unclogged pipes / the total number of pipes in each group) × 100%.

[0063] The test results are shown in Table 2.

[0064] Table 2 Test results of clog removal effect

[0065] sample Complete dredging rate Description of dredging effect Example 1 86％ Most of the blockages in the pipes have been cleared and the water flow is smoother. Example 2 90％ Most pipelines are completely cleared, with only a few remaining pipes Example 3 95％ Almost all pipelines are completely unblocked, with significant results Comparative Example 1 77％ Some pipelines have been cleared, but many pipelines are still significantly blocked. Comparative Example 2 65％ Some pipelines have been cleared, but many pipelines are still significantly blocked.

[0066] It can be seen from the test results that the clog removal effects of the pipe clog remover compositions of Examples 1 - 3 are significantly better than those of Comparative Examples 1 - 2. In Comparative Example 1, due to no cross - linking, no three - dimensional network structure was formed, its stability was not as good as that of the present invention, and the contact time between the clog remover and the clogging was short, resulting in some clogging not being effectively removed; in Comparative Example 2, there is no physical core of attapulgite, the stability of the cross - linked network is worse than that of the present invention, and the physical adsorption and friction effects of attapulgite are lacking, so the clog removal effect is poor. This shows that the components of the pipe clog remover composition prepared by the present invention act synergistically to effectively improve the clog removal effect.

[0067] Test Example 2: Corrosion Test on Pipes

[0068] Perform a corrosion test on the pipe dredging agent compositions of Examples 1 - 3 and Comparative Examples 1 - 2 on pipes.

[0069] Test Method: Prepare 5 groups of metal pipe specimens of the same specification (the material is common galvanized iron pipe, the length is 100 mm, and the outer diameter is 25 mm) and 5 groups of plastic pipe specimens of the same specification (the material is PVC, the length is 100 mm, and the outer diameter is 25 mm). Pour the pipe dredging agent compositions of Examples 1 - 3 and Comparative Examples 1 - 2 into the corresponding pipe specimens respectively, ensure that the specimens are completely immersed in the dredging agent, and place them at room temperature for 72 h. After 72 h, take out the pipe specimens, rinse them with clean water, then observe the surface corrosion condition of the metal pipe specimens (such as rust, corrosion pits, etc.), measure the weight change of the metal pipe specimens, and calculate the corrosion rate; for the plastic pipe specimens, observe whether there are phenomena such as deformation, discoloration, cracking on their surfaces.

[0070] The test results are shown in Table 3.

[0071] Table 3 Corrosion Test Results on Pipes

[0072] sample Metal pipeline corrosion rate Metal pipe surface condition Plastic pipe surface condition Example 1 0.05％ The surface has slight discoloration, no obvious corrosion pits No deformation, discoloration or cracking Example 2 0.04％ The surface remains basically unchanged No deformation, discoloration or cracking Example 3 0.03％ The surface maintains its original gloss without obvious changes No deformation, discoloration or cracking Comparative Example 1 0.12％ A small amount of rust and corrosion pits appear on the surface No deformation, discoloration or cracking Comparative Example 2 0.15％ There are many rust spots on the surface and obvious corrosion pits No deformation, discoloration or cracking

[0073] It can be seen from the test results that the corrosivity of the pipe dredging agent compositions of Examples 1 - 3 to metal pipes is significantly lower than that of Comparative Examples 1 - 2. This is because the formula of the present invention does not contain strongly corrosive substances such as alkali metal hydroxides, and each component cooperates with each other, while ensuring the dredging effect, reducing the corrosion risk to pipes. Due to the incomplete modification of xanthan gum in Comparative Example 1 and Comparative Example 2, the stability of the adhesion layer formed on the inner wall of the pipe is relatively poor, resulting in relatively high corrosivity to metal pipes. For plastic pipes, no obvious adverse effects occurred in all samples, indicating that the pipe dredging agent composition of the present invention is relatively safe for plastic pipes.

[0074] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above - mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non - restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

[0075] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pipeline dredging agent composition without alkali metal hydroxide, characterized in that, Comprising components with the following mass fractions: Wherein, The modified xanthan gum is obtained by grafting carboxylated xanthan gum onto acid-activated attapulgite and then crosslinking with glutaraldehyde.

2. The pipe clog remover composition without alkali metal hydroxide according to claim 1, characterized in that, The surfactant is selected from one or more of anionic surfactants, nonionic surfactants or zwitterionic surfactants.

3. The pipe clog remover composition without alkali metal hydroxide according to claim 1, characterized in that, The mercapto compound is selected from one or more of mercaptoacetic acid, mercaptopropionic acid, mercaptobutyric acid, mercapto carboxylate, mercaptoethanol, mercaptopropanol or mercaptoethylamine.

4. The pipe clog remover composition without alkali metal hydroxide according to claim 1, wherein The inorganic salt is selected from one or more of sodium chloride, potassium chloride, calcium chloride, potassium sulfate, magnesium sulfate, sodium carbonate, sodium phosphate or sodium sulfate.

5. The pipe clog remover composition without alkali metal hydroxide according to claim 1, wherein The thickener is selected from one or more of sodium carboxymethyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose or guar gum locust bean gum.

6. The pipe clog remover composition without alkali metal hydroxide according to claim 1, characterized in that, The synergist is selected from one or more of pyrrolidone compounds or amide compounds.

7. A method for preparing a pipeline dredging agent composition without alkali metal hydroxide according to any one of claims 1-6, characterized in that, Including the following steps: S1. Blend xanthan gum, potassium carbonate and methyl bromoacetate, stir and react, then adjust the pH to acidic, add water and ethanol, heat and react, and purify to obtain carboxylated xanthan gum; S2. Blend the carboxylated xanthan gum with acid-activated attapulgite, heat and react to obtain attapulgite-grafted xanthan gum; S3. Dissolve the attapulgite-grafted xanthan gum in a solvent, adjust the pH to acidic, add glutaraldehyde, stir and react to obtain modified xanthan gum; S4. Add water to the reaction vessel, under stirring, add the inorganic salt, stir evenly; add the surfactant, stir evenly; add the mercapto compound, stir evenly; add the thickener, stir evenly; add the modified xanthan gum, stir evenly; add the synergist, stir evenly to obtain a pipe clog remover composition without alkali metal hydroxides.

8. The preparation method of the pipeline dredging agent composition without alkali metal hydroxide according to claim 7, characterized in that, In step S1, the mass ratio of the xanthan gum, potassium carbonate and methyl bromoacetate is 1:(0.5 - 2.5):(1 - 3).

9. The preparation method of the pipeline dredging agent composition without alkali metal hydroxide according to claim 7, characterized in that, In step S2, the mass ratio of the carboxylated xanthan gum to the acid-activated attapulgite is 1:(0.1 - 0.5).

10. The preparation method of the pipe clog remover composition without alkali metal hydroxide according to claim 7, characterized in that, In step S3, the mass ratio of the attapulgite-grafted xanthan gum to glutaraldehyde is (10 - 30):1.

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