Polyacrylamide emulsion reaction kettle cleaning agent as well as preparation method and application thereof
A cleaning agent composed of modified acrylic acid and surfactants solves the problem of cleaning polymer residues by utilizing charge complementarity and solvent swelling, thereby improving cleaning efficiency and making it suitable for industrial cleaning equipment.
Patent Information
- Application Number
- CN202510910030.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-02
- Publication Date
- 2025-11-18
AI Technical Summary
In the prior art, the cleaning agent used in polyacrylamide emulsion reactors forms polymer residues on the reactor walls and agitators, which leads to a decrease in heat transfer efficiency, affects product quality, and may damage the equipment. In addition, the cleaning efficiency is low and the cost is high.
A cleaning agent composed of modified acrylic acid, surfactant, buffer solution, and solvent is sprayed onto the vessel wall and agitator surface via a circulating spray device. The modified acrylic acid and surfactant enhance dispersibility through charge complementarity, the solvent promotes swelling, and the buffer solution protects the vessel wall, thus achieving rapid cleaning.
It achieves efficient and environmentally friendly cleaning results, reduces additional pretreatment steps, improves cleaning removal rate, and is suitable for industrial cleaning equipment.
Smart Images
Figure CN120966570A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of chemical equipment cleaning, in particular to a polyacrylamide emulsion reactor cleaning agent and a preparation method and application thereof. BACKGROUND
[0002] Polyacrylamide emulsion reactors are prone to form polymer residues on the reactor wall and the stirrer during production. These residues, after polymerization and solidification, can wear the reactor wall, reduce the heat transfer efficiency of the reactor, affect product quality, and even cause equipment damage. Traditional cleaning methods include mechanical scraping, high-pressure water flushing, and chemical cleaning, but mechanical scraping can easily damage the inner wall of the reactor, high-pressure water flushing consumes a large amount of water and has poor cleaning effect on stubborn residues, chemical cleaning has low efficiency, requires a large amount of cleaning agent, long soaking time, and is high in cost, affecting production efficiency and being environmentally unfriendly.
[0003] Therefore, it is of great significance to develop an efficient and environmentally friendly reactor cleaning agent and cleaning method. SUMMARY
[0004] The present application provides a polyacrylamide emulsion reactor cleaning agent and a preparation method and application thereof to solve the problem of poor cleaning effect of polyacrylamide emulsion reactors in related technologies.
[0005] In a first aspect, a polyacrylamide emulsion reactor cleaning agent is provided, which comprises, in terms of mass fraction:
[0006] 10-20 parts of modified acrylic acid, 8-15 parts of surfactant, 5-10 parts of buffer, 3-8 parts of solvent, and 50-70 parts of water;
[0007] The preparation of the modified acrylic acid comprises the following steps:
[0008] The modifier and acrylic acid are dissolved in deionized water, and the mixture is stirred and dissolved at 30°C. The mass ratio of the modifier to acrylic acid is 1:(2-4), and the mass-volume ratio of the modifier to deionized water is 1g:10mL.
[0009] The temperature is raised to 70°C, and then ammonium persulfate solution is added dropwise. The reaction is carried out under continuous stirring for 3h. After the reaction is completed, the mixture is cooled to room temperature to obtain modified acrylic acid. In the ammonium persulfate solution, the mass ratio of ammonium persulfate to deionized water is 1:50.
[0010] Preferably, the modifier comprises maleic anhydride and itaconic acid, and the mass ratio of maleic anhydride to itaconic acid is 2:1.
[0011] Preferably, the surfactant comprises lauryl amide, sodium chloroethyl sulfonate, and deionized water.
[0012] The preparation method of the surfactant comprises the following steps:
[0013] The lauryl amide is mixed with deionized water in a mass ratio of 1:(3-4), stirred into a turbid solution, and then sodium chloroethyl sulfonate is added, and the stirring is continued for 30 min to obtain the surfactant, and the mass of the sodium chloroethyl sulfonate is 1-2 times the mass of the lauryl amide.
[0014] Preferably, the preparation method of the buffer comprises the following steps:
[0015] The glycyrrhizic acid, tannic acid and glycine are mixed in a mass ratio of (1-2):2:1, and then deionized water is added to obtain an intermediate solution, and the mass of the deionized water is 30 times the mass of the glycine;
[0016] Wood vinegar is added to the intermediate solution to adjust the pH to 8.5 to obtain the buffer, and the mass of the wood vinegar is 0-5 times the mass of the glycine.
[0017] Preferably, the preparation method of the solvent comprises the following steps:
[0018] Dimethyl carbonate and propylene glycol dilaurate are mixed in a mass ratio of 5:(2-4) and stirred for 15 min, and then an ethanol solution of safflower glycoside is added, and ultrasonic dispersion is performed for 5 min to obtain the solvent, and in the ethanol solution of safflower glycoside, the mass ratio of safflower glycoside to dimethyl carbonate is 5:0.4.
[0019] Preferably, in the ethanol solution of safflower glycoside, the mass ratio of safflower glycoside to ethanol is 2:5.
[0020] In a second aspect, a preparation method of the polyacrylamide emulsion reactor cleaning agent is provided, and the preparation method comprises the following steps:
[0021] S1, preparing an aqueous phase: water is heated to 40-50℃, and then modified acrylic acid, a surfactant and a buffer are added thereto, and stirring is performed for 15-20 min to obtain the aqueous phase;
[0022] S2, preparing an emulsion: the solvent is uniformly mixed under continuous stirring, and then added dropwise into the aqueous phase at a dropwise adding speed of 5-10 mL / min, and after the dropwise adding is completed, stirring is performed at a rotating speed of 800-1000 rpm for 20-30 min to obtain the emulsion;
[0023] S3, homogenizing: the emulsion is added into a homogenizer at 20-25℃ and treated for 10-15 min to obtain the polyacrylamide emulsion reactor cleaning agent, and the pressure of the homogenizer is 20-30 MPa.
[0024] Thirdly, an application of the polyacrylamide emulsion reactor cleaning agent as described in any of the above-mentioned methods is provided, the application comprising the following steps:
[0025] The polyacrylamide emulsion reactor cleaning agent is circulated and sprayed onto the inner wall of the reactor, the coil and the surface of the agitator through a circulating spraying device. The spraying pressure is 1.5 MPa and the spraying time is 45 min.
[0026] The cleaning agent for the polyacrylamide emulsion reactor was continuously sprayed in a circulating spraying device at 60-70°C for 2 hours.
[0027] After cleaning, the waste liquid is introduced into a special waste liquid collection tank through the drain valve at the bottom of the reactor. After measuring the acidity and alkalinity of the waste liquid, a neutralizing agent is added according to the acidity and alkalinity of the waste liquid before discharge.
[0028] The beneficial effects of the technical solution provided in this application include:
[0029] This application provides a polyacrylamide emulsion reactor cleaning agent, its preparation method, and its application. By using modified acrylic acid to construct a multi-carboxyl molecular structure, the coordination adsorption between polyacrylamide and the reactor inner wall is rapidly interrupted. The modified acrylic acid is compounded with a surfactant, and the charge complementarity enhances the colloidal dispersion stability of the polyacrylamide. Furthermore, it combines with the solvent system to promote simultaneous swelling in both polar and non-polar regions, improving peeling efficiency. A buffer is used to mitigate the corrosion of the reactor inner wall by the cleaning agent, enhancing environmental friendliness. The polyacrylamide emulsion reactor cleaning agent provided in this application can be directly used in industrial cleaning equipment such as spray and circulation systems without additional pretreatment steps, and it exhibits good cleaning removal rates, showing promising prospects for industrial application. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 A flowchart illustrating the preparation method of the polyacrylamide emulsion reactor cleaning agent provided in this application. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0033] See Figure 1 As shown, this application provides a polyacrylamide emulsion reactor cleaning agent, its preparation method and application, wherein the polyacrylamide emulsion reactor cleaning agent (hereinafter referred to as cleaning agent) comprises 10-20 parts modified acrylic acid, 8-15 parts surfactant, 5-10 parts buffer solution, 3-8 parts solvent and 50-70 parts water by mass.
[0034] Example 1
[0035] The preparation method of the polyacrylamide emulsion reactor cleaning agent provided in this embodiment includes the following steps:
[0036] S1. Preparation of aqueous phase: Heat 120g of water to 40℃, then add 30g of modified acrylic acid, 25g of surfactant and 15g of buffer solution, stir for 15min to obtain aqueous phase;
[0037] S2. Preparation of emulsion: Under continuous stirring, 10g of solvent is mixed evenly and then dropped into the aqueous phase at a rate of 6mL / min. After the addition is complete, the mixture is stirred at 900rpm for 30min to obtain the emulsion.
[0038] S3. Homogenization: The emulsion is added to a homogenizer at 25°C and processed for 10 minutes to obtain a polyacrylamide emulsion reactor cleaning agent. The pressure of the homogenizer is 25 MPa.
[0039] The modified acrylic acid is prepared by the following method:
[0040] 10g of modifier and 30g of acrylic acid were dissolved in 100mL of deionized water and stirred at 30℃. The temperature was then raised to 70℃, and ammonium persulfate solution (1g of ammonium persulfate dissolved in 50mL of water) was added dropwise. The reaction was carried out under continuous stirring for 3 hours. After the reaction was completed, the mixture was cooled to room temperature to obtain modified acrylic acid. The modifier consisted of 6.7g of maleic anhydride and 3.3g of itaconic acid.
[0041] The surfactant preparation method is as follows:
[0042] Mix 20g lauramide with 70g deionized water, stir to form a turbid solution, then add 25g sodium chloroethyl sulfonate and continue stirring for 30 minutes to obtain the surfactant.
[0043] The buffer solution is prepared as follows:
[0044] Mix 6g glycyrrhizic acid, 10g tannic acid, and 5g glycine, then add 150g deionized water to obtain an intermediate solution. Add 10g wood vinegar to the intermediate solution and adjust the pH to 8.5 using sodium bicarbonate to obtain a buffer solution.
[0045] The solvent preparation method is as follows:
[0046] Mix 10g of dimethyl carbonate and 6g of propylene glycol dilaurate and stir for 15 minutes. Add an ethanol solution of safflower glycoside and sonicate for 5 minutes to obtain a solvent. The ethanol solution of safflower glycoside includes 0.8g of safflower glycoside and 2g of ethanol.
[0047] Example 2
[0048] The difference from Example 1 is that in the preparation of modified acrylic acid, the amount of acrylic acid added is 20g.
[0049] Example 3
[0050] The difference from Example 1 is that wood vinegar is not added in the preparation of the buffer solution.
[0051] Example 4
[0052] The preparation method of the polyacrylamide emulsion reactor cleaning agent provided in this embodiment includes the following steps:
[0053] S1. Preparation of aqueous phase: Heat 100g of water to 50℃, then add 20g of modified acrylic acid, 16g of surfactant and 10g of buffer solution, stir for 20min to obtain aqueous phase;
[0054] S2. Preparation of emulsion: Under continuous stirring, 6g of solvent was mixed evenly and then dropped into the aqueous phase at a dropping rate of 5mL / min. After the dropping was completed, the mixture was stirred at 1000rpm for 20min to obtain the emulsion.
[0055] S3. Homogenization: The emulsion is added to a homogenizer at 20°C and processed for 15 minutes to obtain a polyacrylamide emulsion reactor cleaning agent. The pressure of the homogenizer is 20 MPa.
[0056] The modified acrylic acid is prepared by the following method:
[0057] 10g of modifier and 20g of acrylic acid were dissolved in 100mL of deionized water and stirred at 30℃. The temperature was then raised to 70℃, and ammonium persulfate solution (1g of ammonium persulfate dissolved in 50mL of water) was added dropwise. The reaction was carried out under continuous stirring for 3 hours. After the reaction was completed, the mixture was cooled to room temperature to obtain modified acrylic acid. The modifier consisted of 6.7g of maleic anhydride and 3.3g of itaconic acid.
[0058] The surfactant preparation method is as follows:
[0059] Mix 20g lauramide with 60g deionized water, stir to form a turbid solution, then add 20g sodium chloroethyl sulfonate and continue stirring for 30 minutes to obtain the surfactant.
[0060] The buffer solution is prepared as follows:
[0061] Mix 5g glycyrrhizic acid, 10g tannic acid, and 5g glycine, then add 150g deionized water to obtain an intermediate solution. Add 25g wood vinegar to the intermediate solution and adjust the pH to 8.5 using sodium bicarbonate to obtain a buffer solution.
[0062] The solvent preparation method is as follows:
[0063] Mix 10g of dimethyl carbonate and 4g of propylene glycol dilaurate and stir for 15 minutes. Add an ethanol solution of safflower glycoside and sonicate for 5 minutes to obtain a solvent. The ethanol solution of safflower glycoside includes 0.8g of safflower glycoside and 2g of ethanol.
[0064] Example 5
[0065] The preparation method of the polyacrylamide emulsion reactor cleaning agent provided in this embodiment includes the following steps:
[0066] S1. Preparation of aqueous phase: Heat 140g of water to 45℃, then add 40g of modified acrylic acid, 30g of surfactant and 20g of buffer solution, stir for 15min to obtain aqueous phase;
[0067] S2. Preparation of emulsion: 16g of solvent was mixed evenly under continuous stirring and then dropped into the aqueous phase at a dropping rate of 10mL / min. After the dropping was completed, the mixture was stirred at 800rpm for 25min to obtain the emulsion.
[0068] S3. Homogenization: The emulsion is added to a homogenizer at 20°C and processed for 12 minutes to obtain a polyacrylamide emulsion reactor cleaning agent. The pressure of the homogenizer is 30 MPa.
[0069] The modified acrylic acid is prepared by the following method:
[0070] 10g of modifier and 40g of acrylic acid were dissolved in 100mL of deionized water and stirred at 30℃. The temperature was then raised to 70℃, and ammonium persulfate solution (1g of ammonium persulfate dissolved in 50mL of water) was added dropwise. The reaction was carried out under continuous stirring for 3 hours. After the reaction was completed, the mixture was cooled to room temperature to obtain modified acrylic acid. The modifier consisted of 6.7g of maleic anhydride and 3.3g of itaconic acid.
[0071] The surfactant preparation method is as follows:
[0072] Mix 15g lauramide with 60g deionized water, stir to form a turbid solution, then add 30g sodium chloroethyl sulfonate and continue stirring for 30 minutes to obtain the surfactant.
[0073] The buffer solution is prepared as follows:
[0074] Mix 10g glycyrrhizic acid, 10g tannic acid, and 5g glycine, then add 150g deionized water to obtain an intermediate solution. Add 5g wood vinegar to the intermediate solution and adjust the pH to 8.5 using sodium bicarbonate to obtain a buffer solution.
[0075] The solvent preparation method is as follows:
[0076] Mix 10g of dimethyl carbonate and 8g of propylene glycol dilaurate and stir for 15 minutes. Add an ethanol solution of safflower glycoside and sonicate for 5 minutes to obtain a solvent. The ethanol solution of safflower glycoside includes 0.8g of safflower glycoside and 2g of ethanol.
[0077] Comparative Example 1
[0078] The difference from Example 1 is that no modifier is added in the preparation of the modified acrylic acid.
[0079] Comparative Example 2
[0080] The difference from Example 1 is that sodium chloroethyl sulfonate is not added to the surfactant.
[0081] Comparative Example 3
[0082] The difference from Example 1 is that glycyrrhizic acid is not added to the buffer solution.
[0083] Comparative Example 4
[0084] The difference from Example 1 is that no modifier is added in the preparation of the modified acrylic acid, and no ethanol solution of safflower glycoside is added to the solvent.
[0085] In the above embodiments and comparative examples, the wood vinegar used was a wood vinegar made from rice husks with an acetic acid content of 15%.
[0086] The cleaning agents prepared in Examples 1-5 and Comparative Examples 1-4 were tested.
[0087] Determination of residual polyacrylamide:
[0088] A 1000 mg / L polyacrylamide aqueous solution was coated onto the inner wall of a 50 L reactor. After drying, the residual amount was approximately 2 g / m³. 2The mass of the dried reactor was measured and recorded as m0. The cleaning agent was prepared as a 10% aqueous solution (100g cleaning agent, 1L water). The solution was used to simulate an industrial spraying system through a peristaltic pump and atomizing nozzle. The spraying pressure was 1.5MPa and the duration was 30min. The mass of the reactor was measured after drying and recorded as m1.
[0089]
[0090] The control group was cleaned with tap water.
[0091] The results are shown in Table 1.
[0092] Table 1
[0093]
[0094]
[0095] In the control group, only tap water was used for rinsing, but the polyacrylamide had poor water solubility and was difficult to remove effectively. In Example 1, the hydrophobic effect of the surfactant and the negatively charged layer formed synergistically repel the carboxyl groups of the modified acrylic acid, causing the solvent to penetrate and swell. Furthermore, the modified acrylic acid provides carboxyl groups to anchor the PAM molecular chains, which then bind to the amide groups of PAM through hydrogen bonding, thus dispersing and dissolving the PAM and significantly improving the removal rate. The buffer solution protects the inner wall of the reactor, reducing the corrosion of the reactor wall by the cleaning agent.
[0096] In Example 2, the amount of acrylic acid was reduced, which indirectly increased the proportion of modifier. The excessively high carboxyl density led to increased molecular chain rigidity, decreased adsorption efficiency, and weakened PAM encapsulation ability. In Example 3, the lack of wood vinegar reduced the hydrolysis efficiency of amide groups, resulting in a slightly higher residue and a lower cleaning removal rate.
[0097] Example 4: The concentrations of each component were reduced, resulting in insufficient effective ingredients, an increased proportion of esters, decreased water solubility, and weakened emulsification. Example 5: The proportion of modifier was reduced, and the carboxyl group density was insufficient, but the high solvent content partially compensated for the penetration effect.
[0098] Comparative Example 1 had no modifier, and the acrylic acid was not grafted with functional groups. It relied solely on weak acid to dissolve PAM, resulting in a significant decrease in the effectiveness. Comparative Example 2 lacked anionic surfactants, and the monocationic surfactant laurylamide could not form a complete emulsion film, resulting in insufficient oil phase dispersion and a decrease in the swelling effect on PAM. Comparative Example 3 lacked glycyrrhizic acid, which mainly played a protective role on the inner wall of the reactor and had little impact on the cleaning and removal rate.
[0099] In Comparative Example 4, the unmodified acrylic acid carboxyl groups were missing, and the solvent lacked safflower glycosides, making it unable to emulsify oil phase impurities. Relying solely on mechanical rinsing and basic surface activity resulted in poor performance.
[0100] This application provides the application of the polyacrylamide emulsion reactor cleaning agent prepared in Example 1 above, the application of which includes the following steps:
[0101] The polyacrylamide emulsion reactor cleaning agent is circulated and sprayed onto the inner wall of the reactor, the coil and the surface of the agitator through a circulating spraying device. The spraying pressure is 1.5 MPa and the spraying time is 45 min.
[0102] The cleaning agent for the polyacrylamide emulsion reactor was continuously sprayed in a circulating spraying device at 60-70°C for 2 hours.
[0103] After cleaning, the waste liquid is introduced into a special waste liquid collection tank through the drain valve at the bottom of the reactor. After measuring the acidity and alkalinity of the waste liquid, a neutralizing agent is added according to the acidity and alkalinity of the waste liquid before discharge.
[0104] Specifically, a customized circulating spray system is designed based on the size, structure, and internal layout of the reactor, and securely installed on top of the reactor using corrosion-resistant connectors. This circulating spray system is equipped with an independent cleaning solution storage tank and circulating pump to ensure a stable supply of cleaning solution. High-pressure nozzles with high atomization performance are selected and distributed at specific angles and intervals in the spray pipes, spraying the cleaning solution evenly and completely onto the reactor's inner wall, coils, and agitator surface at a pressure of 1.5 MPa. A precise time control system ensures the spraying process lasts for 45 minutes, allowing the cleaning solution to fully penetrate the dirt. The reactor's built-in heating and temperature control system then maintains the reaction temperature stably at 60–70°C. At this temperature, the chemical stripping agent, with its strong oxidizing properties, undergoes a redox reaction with the polymer residues, gradually oxidizing and breaking the polymer's chemical bonds over 2 hours, decomposing them into smaller molecules for easier subsequent cleaning.
[0105] Example 6
[0106] This embodiment uses the cleaning agent prepared in Example 1, provides a 25 cubic meter reactor, and sets 15 high-pressure nozzles to spray the cleaning agent in a cone spray pattern.
[0107] The polyacrylamide emulsion reactor cleaning agent is circulated and sprayed onto the inner wall of the reactor, the coil and the surface of the agitator through a circulating spraying device. The spraying pressure is 1.5 MPa and the spraying time is 45 min.
[0108] The cleaning agent for the polyacrylamide emulsion reactor was continuously sprayed in a circulating spraying device at 65°C for 2 hours.
[0109] After cleaning, the waste liquid is introduced into a special waste liquid collection tank through the drain valve at the bottom of the reactor. After measuring the acidity and alkalinity of the waste liquid, sodium carbonate is added to adjust the pH of the waste liquid to 7 before discharge.
[0110] An inspection of the inner wall of the reactor revealed no obvious polyacrylamide residue, oily substances, or deposits.
[0111] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
Claims
1. A cleaning agent for polyacrylamide emulsion reactors, characterized in that, According to parts by weight, it includes: 10-20 parts modified acrylic acid, 8-15 parts surfactant, 5-10 parts buffer solution, 3-8 parts solvent, 50-70 parts water; The preparation of the modified acrylic acid includes the following steps: The modifier and acrylic acid are dissolved in deionized water and stirred at 30°C. The mass ratio of the modifier to acrylic acid is 1:(2-4), and the mass-volume ratio of the modifier to deionized water is 1g:10mL. The temperature was raised to 70°C, and an ammonium persulfate solution was added dropwise. The mixture was then reacted for 3 hours under continuous stirring. After the reaction was completed, the mixture was cooled to room temperature to obtain modified acrylic acid. The mass ratio of ammonium persulfate to deionized water in the ammonium persulfate solution was 1:
50.
2. The polyacrylamide emulsion reactor cleaning agent as described in claim 1, characterized in that: The modifier comprises maleic anhydride and itaconic acid, wherein the mass ratio of maleic anhydride to itaconic acid is 2:
1.
3. The polyacrylamide emulsion reactor cleaning agent as described in claim 1, characterized in that: The surfactants include lauramide, sodium chloroethyl sulfonate, and deionized water; The method for preparing the surfactant includes the following steps: Lauramide was mixed with deionized water at a mass ratio of 1:(3-4), stirred into a turbid liquid, and then sodium chloroethyl sulfonate was added. The mixture was stirred for 30 minutes to obtain a surfactant. The mass of sodium chloroethyl sulfonate was 1 to 2 times that of lauramide.
4. The polyacrylamide emulsion reactor cleaning agent as described in claim 1, characterized in that: The preparation method of the buffer solution includes the following steps: Glycyrrhizic acid, tannic acid, and glycine are mixed in a mass ratio of (1-2):2:1, and then deionized water is added to obtain an intermediate solution. The mass of the deionized water is 30 times the mass of the glycine. Wood vinegar was added to the intermediate solution to adjust the pH to 8.5, resulting in a buffer solution. The mass of the wood vinegar was 0 to 5 times the mass of glycine.
5. The polyacrylamide emulsion reactor cleaning agent as described in claim 1, characterized in that: The method for preparing the solvent includes the following steps: Dimethyl carbonate and propylene glycol dilaurate were mixed and stirred for 15 min at a mass ratio of 5:(2-4). An ethanol solution of safflower glycoside was added and ultrasonically dispersed for 5 min to obtain a solvent. In the ethanol solution of safflower glycoside, the mass ratio of safflower glycoside to dimethyl carbonate was 5:0.
4.
6. The polyacrylamide emulsion reactor cleaning agent as described in claim 5, characterized in that: In the ethanol solution of safflower glycoside, the mass ratio of safflower glycoside to ethanol is 2:
5.
7. A method for preparing a polyacrylamide emulsion reactor cleaning agent as described in any one of claims 1 to 6, characterized in that, It includes the following steps: S1. Preparation of aqueous phase: After heating water to 40-50℃, add modified acrylic acid, surfactant and buffer solution to it, stir for 15-20 min to obtain aqueous phase; S2. Preparation of emulsion: The solvent is mixed evenly under continuous stirring and then dropped into the aqueous phase at a dropping rate of 5-10 mL / min. After the dropping is completed, the mixture is stirred at a speed of 800-1000 rpm for 20-30 min to obtain the emulsion. S3. Homogenization: The emulsion is added to a homogenizer at 20-25°C and processed for 10-15 minutes to obtain a polyacrylamide emulsion reactor cleaning agent. The pressure of the homogenizer is 20-30 MPa.
8. The application of a cleaning agent as described in any one of claims 1 to 6 in the cleaning of a polyacrylamide emulsion reactor.
9. The application as described in claim 8, characterized in that, The application includes the following steps: The polyacrylamide emulsion reactor cleaning agent is circulated and sprayed onto the inner wall of the reactor, the coil and the surface of the agitator through a circulating spraying device. The spraying pressure is 1.5 MPa and the spraying time is 45 min. The cleaning agent for the polyacrylamide emulsion reactor was continuously sprayed in a circulating spraying device at 60-70°C for 2 hours. After cleaning, the waste liquid is introduced into a special waste liquid collection tank through the drain valve at the bottom of the reactor. After measuring the acidity and alkalinity of the waste liquid, a neutralizing agent is added according to the acidity and alkalinity of the waste liquid before discharge.