A solubilizer for improving acid resistance of an industrial cleaning active agent and a method for preparing the same

Abstract

This invention discloses a solubilizer for improving the acid resistance of industrial cleaning surfactants and its preparation method. The solubilizer, by mass percentage, comprises the following components: 1-10% thiourea, 1-3% sodium alginate, 25-40% alkyl glycoside, and 50-70% modified carboxymethyl cellulose. The modified carboxymethyl cellulose is prepared by sequentially modifying carboxymethyl cellulose through hydroxyphosphorylation, weak sulfonation, and ammoniation. Compared to BASF's dominant solubilizer LF70, Dow Chemical's H66, and domestic Haian Petrochemical's MAP-3, the preparation method of this solubilizer for improving the acid resistance of industrial cleaning surfactants is simple, pollution-free, does not require high temperature and high pressure, and has low energy consumption. The process only requires specific low-temperature, low-energy modification of existing carboxymethyl cellulose, followed by simple stirring and compounding. It exhibits excellent solubilizing performance, superior to the foreign-monopolized LF70 and H66, and is inexpensive, accounting for only 70% of the cost of imported products.

Description

Technical Field

[0001] This invention relates to the field of solubilizer technology, specifically to a solubilizer for improving the acid resistance of industrial cleaning agents and its preparation method. Background Technology

[0002] With the continuous upgrading of industrial technology and the development of lightweight metal substrates, the application range of magnesium, aluminum, and their alloys is becoming increasingly wide. Industrial cleaning of magnesium, aluminum, and their alloys mainly employs acidic cleaning agents to remove surface oil stains and oxide layers of aluminum and magnesium oxide formed by air oxidation. Industrial acidic cleaning agents for magnesium, aluminum, and their alloys induce a hydrogen erosion reaction at the interface of the substrate, dissolving the oxide layer. Simultaneously, the hydrogen gas generated by the hydrogen erosion reaction floats to the surface, carrying away the oxide layer; this is the mechanism of acidic cleaning. However, water-based acidic cleaning agents often lack sufficient wettability for surface oil stains, requiring the addition of surfactants to increase the oleophilicity of the cleaning agent and achieve interface wetting. Furthermore, the wetting and emulsifying effects of the surfactants enhance the degreasing rate and cleanliness.

[0003] Currently, commercially available high-efficiency surfactants have poor acid resistance. The limit of their resistance to free acid determines the concentration of acidic cleaning agents. If the surfactant concentration is too high, the cleaning agent will exhibit stratification and precipitation. After prolonged storage, the precipitated surfactant may even solidify, affecting the normal use of the product. To increase product concentration, the most widely used solution by commercial cleaning agent companies is to produce a two-component form (A and B agents), manufacturing the acid and surfactant components separately and adding them in proportion during the production process. This solution is gradually being adopted in the cleaning market, but many customers require single-component solutions, leading the cleaning industry to seek superior solubilizers to address this issue.

[0004] Currently, the mainstream approach both domestically and internationally is to improve the solubility of acid-sensitive surfactants in strong acid solutions by synthesizing substances with specific structures to compound cleaning agents. However, the synthesis of such solubilizers has drawbacks such as complex processes, high energy consumption, high costs, and poor compatibilization performance. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the primary objective of this invention is to provide a solubilizer that improves the acid resistance of industrial cleaning agents.

[0006] A further objective of this invention is to provide a method for preparing the above-mentioned solubilizer for improving the acid resistance of industrial cleaning agents. This method can obtain a highly efficient solubilizer through low-temperature modification and simple compounding reaction, effectively improving the solubility of cleaning agents in acidic conditions. It is low-cost, simple in process, and achieves top-level performance.

[0007] The above-mentioned objective of this invention is achieved through the following technical solution:

[0008] A solubilizer for improving the acid resistance of industrial cleaning agents, wherein the solubilizer comprises, by mass percentage: 1-10% thiourea, 1-3% sodium alginate, 25-40% alkyl glycoside, and 50-70% carboxymethyl cellulose modifier;

[0009] The modified carboxymethyl cellulose was prepared by sequentially modifying carboxymethyl cellulose through hydroxyphosphorylation, weak sulfonation, and ammoniation.

[0010] The key to the superior acid compatibilizing effect of the solubilizer in this invention lies in the modified carboxymethyl cellulose.

[0011] Preferably, the solubilizer comprises, by mass percentage, the following components: thiourea 3-5%, sodium alginate 1.5-2%, alkyl glycoside 25-35%, and carboxymethyl cellulose modifier 56-70%.

[0012] Furthermore, the carboxymethyl cellulose is modified by hydroxyphosphorylation using phosphorus pentoxide.

[0013] Carboxymethyl cellulose has a large number of functional groups such as oxygen-containing hydroxyl groups on its surface. Under heating conditions, phosphorus pentoxide can react chemically with functional groups such as hydroxyl groups to generate phosphate ester groups. Therefore, phosphorus pentoxide realizes the phosphorylation of special active hydroxyl groups in carboxymethyl cellulose, and the phosphate esterification group can effectively improve the acid resistance of the molecule.

[0014] Furthermore, the carboxymethyl cellulose is weakly sulfonated using ammonium xylenesulfonate.

[0015] Ammonium xylenesulfonate itself has an acid compatibilizing effect. The addition of ammonium xylenesulfonate can effectively achieve the weak sulfonation modification of phosphorylated carboxymethyl cellulose. The modified carboxymethyl cellulose contains sulfonated groups, which can improve the affinity of ester groups after polymerization of ethylene oxide and propylene oxide in the surfactant, and have a strong carrying capacity for acid-sensitive surfactants, thereby improving the stability of the subsequent surfactants in acidic conditions.

[0016] Furthermore, the carboxymethyl cellulose is modified by ammoniation with ammonia.

[0017] On the one hand, the hydrogen ions formed by the hydrolysis of ammonia and phosphorus pentoxide undergo acid-base neutralization to form neutral ammonium ions, and the free ammonium ions themselves have strong acid resistance and solubilizing properties; on the other hand, ammonia water ammonifies and modifies phospholipidated carboxymethyl cellulose.

[0018] In other words, after phosphorus pentoxide reacts with functional groups such as hydroxyl groups to generate phosphate ester groups, the subsequent addition of ammonium xylenesulfonate and ammonia water ammonizes the carboxylic acid groups in carboxymethyl cellulose and the phosphate ester groups generated by the modification reaction. Phospholipidation and ammoniation can effectively improve the acid resistance of carboxymethyl cellulose.

[0019] This invention employs a rational compounding of various solubilizing materials to ammonize and phospholipidate some of the oxygen-containing groups of carboxymethyl cellulose (CMC), thereby improving the hydrogen ion resistance of CMC and enhancing its tolerance in acidic systems. The modified CMC possesses excellent molecular affinity, enabling it to interact with the hydrophilic / lipophilic (eo / po) groups of detergent surfactants and the ether ester groups formed after the reaction with the surfactants. This results in the formation of disordered micelles at the microscopic level within the detergent, with the phosphated and ammonified molecules facing outwards, while the hydrogen-ion-intolerant parts are aligned with the surfactant, thus improving the solubilizing properties of the detergent surfactant.

[0020] The alkyl glycosides in the solubilizer of this invention have weak solubilizing properties. On the one hand, alkyl glycosides and modified carboxymethyl cellulose have good acid resistance in highly acidic systems. On the other hand, they have good carrying and affinity for eo / po in surfactants. Thus, in acidic systems, surfactants that are not resistant to high acids are carried into a disordered micelle state, with an acid-resistant structure and groups on the outer surface and an internal portion containing the acid-sensitive surfactants, thereby achieving solubilizing properties. Sodium alginate can increase the viscosity of the final cleaning agent, affect the hydrogen bonding energy in the cleaning agent, and passivate the repulsive forces caused by hydrogen bonds in highly acidic systems, thereby improving the solubility of the solubilizer in acidic cleaning agents. The urea functional group in thiourea has a good solubilizing effect on hydrogen ions in acids and has a small molecular space. The urea group also has a good affinity for the hydroxyl functional group. In acidic cleaning systems, it can enhance the barrier effect at the interface of disordered micelles formed by the affinity of modified carboxymethyl cellulose and alkyl glycosides, thereby improving the solubilizing properties of industrial cleaning agents in high acids and their long-term stability after solubilization.

[0021] Furthermore, the preparation method of the modified carboxymethyl cellulose includes the following steps:

[0022] Carboxymethyl cellulose was dissolved in water to obtain an aqueous solution of carboxymethyl cellulose. Phosphorus pentoxide was added to the aqueous solution of carboxymethyl cellulose, and a mixed solution was obtained after the reaction was completed. Ammonium xylenesulfonate was added to the mixed solution to carry out the reaction. After the reaction was completed, ammonia water was added to continue the reaction. After the reaction was completed, the modified carboxymethyl cellulose was obtained.

[0023] Furthermore, the temperature at which the carboxymethyl cellulose is dissolved is 70–80°C.

[0024] Furthermore, the reaction temperature for preparing the carboxymethyl cellulose modified product is 70–80°C.

[0025] In a specific embodiment, the preparation method of the carboxymethyl cellulose modified material includes the following steps:

[0026] S1. Add 5-10% water to the reactor, add 30-35% carboxymethyl cellulose to the water and start heating. The heating rate is 0.1-0.5℃ / min. Stop heating when the temperature reaches 70-80℃. Keep the temperature constant and stir at a stirring rate of 30-40 r / min. After stirring for 5-7 h, an aqueous solution of carboxymethyl cellulose is obtained.

[0027] S2. While stirring, slowly add 2-5% phosphorus pentoxide to the carboxymethyl cellulose aqueous solution obtained in step S1. After all the phosphorus pentoxide has dissolved, increase the stirring speed to 50-60 r / min and continue stirring for 10-12 h.

[0028] S3. Add 3-4% ammonium xylenesulfonate to the mixed solution obtained in step S2, and continue stirring for 3-5 hours;

[0029] S4. Add 2-5% ammonia water to the mixed solution obtained in step S3, add the remaining water, and continue stirring for 10-12 hours. After the reaction is completed, stop heating, continue stirring and let it cool naturally to room temperature to obtain the modified carboxymethyl cellulose.

[0030] Furthermore, the alkyl glycoside is alkyl glycoside 1214.

[0031] A method for preparing a solubilizer to improve the acid resistance of industrial cleaning surfactants includes the following steps: adding thiourea, sodium alginate, and carboxymethyl cellulose modifier sequentially to an alkyl glycoside, and mixing to obtain the solubilizer for improving the acid resistance of industrial cleaning surfactants.

[0032] Furthermore, the mixing temperature of the solubilizer used to prepare the acid resistance of the industrial cleaning agent is 45–55°C.

[0033] In a specific embodiment, the preparation method includes the following steps: adding alkyl glycosides to a reaction vessel while heating and stirring, stopping heating when the temperature reaches 45-55°C; slowly adding thiourea and sodium alginate while stirring vigorously, and maintaining constant temperature and stirring for 2-3 hours after they are completely dissolved; finally adding carboxymethyl cellulose modifier, continuing to stir at constant temperature for more than 3 hours, and obtaining the solubilizer that improves the acid resistance of the industrial cleaning surfactant after cooling.

[0034] In this invention, thiourea and sodium alginate are in solid form and need to be dissolved during the compounding process of the solubilizer. Alkyl glycosides have good solubility for them, so thiourea and sodium alginate are dissolved into alkyl glycosides first. The resulting solubilizer is more stable and less prone to precipitation. It can also shorten the compounding stirring time and reduce energy consumption costs.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] The method for preparing a solubilizer that improves the acid resistance of industrial cleaning agents provided by this invention is simpler and pollution-free than the dominant solubilizers on the market, such as BASF's LF70, Dow Chemical's H66, and Haian Petrochemical's MAP-3. The process does not require high temperature and high pressure, and the energy consumption is low. The process only requires specific low-temperature and low-energy modification of existing carboxymethyl cellulose, followed by simple stirring and compounding. The solubilizing performance is excellent, superior to the foreign monopoly LF70 and H66, and the cost is low, accounting for only 70% of the cost of imported products. Detailed Implementation

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0038] The present invention will be further described below with reference to specific embodiments, so that those skilled in the art can better understand and implement the present invention, but the embodiments are not intended to limit the present invention.

[0039] Unless otherwise specified, the experimental methods used in the following embodiments are conventional methods, and the materials and reagents used are commercially available. The materials and reagents used in the embodiments of this invention were purchased from the Alibaba online platform of Shandong Yousuo Chemical Technology Co., Ltd.

[0040] In the following examples, the method for preparing the modified carboxymethyl cellulose is as follows:

[0041] S1. Add 5-10% water to the reactor, add 30-35% carboxymethyl cellulose to the water and start heating at a rate of 0.1℃ / min. Stop heating when the temperature reaches 75℃, and maintain constant temperature while stirring at a rate of 30r / min. After stirring for 5 hours, an aqueous solution of carboxymethyl cellulose is obtained.

[0042] S2. While stirring, slowly add 2-5% phosphorus pentoxide to the carboxymethyl cellulose aqueous solution obtained in step S1. After all the phosphorus pentoxide has dissolved, increase the stirring speed to 50 r / min and continue stirring for 10 h.

[0043] S3. Add 3-4% ammonium xylenesulfonate to the mixed solution obtained in step S2 and continue stirring for 4 hours;

[0044] S4. Add 2-5% ammonia water to the mixed solution obtained in step S3, add the remaining water, and continue stirring for 10 hours. After the reaction is completed, stop heating, continue stirring and let it cool naturally to room temperature to obtain the modified carboxymethyl cellulose.

[0045] Example 1

[0046] A solubilizer for improving the acid resistance of industrial cleaning agents comprises, by mass percentage: 10% thiourea, 1% sodium alginate, 30% alkyl glycoside 1214, and 59% carboxymethyl cellulose modifier.

[0047] Example 2

[0048] A solubilizer for improving the acid resistance of industrial cleaning agents comprises, by mass percentage: 1% thiourea, 3% sodium alginate, 40% alkyl glycoside 1214, and 56% carboxymethyl cellulose modifier.

[0049] Example 3

[0050] A solubilizer for improving the acid resistance of industrial cleaning agents comprises, by mass percentage: 5% thiourea, 1.5% sodium alginate, 35% alkyl glycoside 1214, and 58.5% carboxymethyl cellulose modifier.

[0051] Example 4

[0052] A solubilizer for improving the acid resistance of industrial cleaning agents comprises, by mass percentage: 10% thiourea, 3% sodium alginate, 37% alkyl glycoside 1214, and 50% carboxymethyl cellulose modifier.

[0053] Example 5

[0054] A solubilizer for improving the acid resistance of industrial cleaning agents comprises, by mass percentage: 3% thiourea, 2% sodium alginate, 25% alkyl glycoside 1214, and 70% carboxymethyl cellulose modifier.

[0055] The preparation methods of the solubilizers for improving the acid resistance of industrial cleaning surfactants in Examples 1-5 include the following steps:

[0056] Alkyl glycosides were added to the reaction vessel while heating and stirring. Heating was stopped when the temperature reached 50°C. Thiourea and sodium alginate were added slowly while stirring vigorously. After they were completely dissolved, the mixture was stirred at a constant temperature for 3 hours. Finally, carboxymethyl cellulose was added and the mixture was stirred at a constant temperature for another 3 hours. After cooling, the solubilizer that improves the acid resistance of the industrial cleaning agent was obtained.

[0057] Comparative Example 1

[0058] A solubilizer, by mass percentage, comprises the following components: 10% thiourea, 12% alkyl glycoside, 30% carboxymethyl cellulose modifier, 59% water.

[0059] The preparation method of the solubilizer in Comparative Example 1 includes the following steps:

[0060] Alkyl glycosides were added to the reactor while heating and stirring. Heating was stopped when the temperature reached 50°C. Thiourea and water were slowly added while stirring vigorously. After they were completely dissolved, the mixture was kept at a constant temperature and stirred for 3 hours. Finally, carboxymethyl cellulose was added and the mixture was kept at a constant temperature and stirred for another 3 hours. After cooling, the solubilizer was obtained.

[0061] Comparative Example 2

[0062] A solubilizer, by mass percentage, comprises the following components: 1% sodium alginate, 30% alkyl glycoside 1214, 59% carboxymethyl cellulose modifier, and 10% water.

[0063] The preparation method of the solubilizer in Comparative Example 2 includes the following steps:

[0064] Alkyl glycosides were added to the reactor while heating and stirring. Heating was stopped when the temperature reached 50°C. Water and sodium alginate were slowly added while stirring vigorously. After they were completely dissolved, the mixture was stirred at a constant temperature for 3 hours. Finally, carboxymethyl cellulose was added and the mixture was stirred at a constant temperature for another 3 hours. After cooling, the solubilizer was obtained.

[0065] Comparative Example 3

[0066] A solubilizer, by mass percentage, comprises the following components: 10% thiourea, 1% sodium alginate, 59% carboxymethyl cellulose modifier, and 30% water.

[0067] The preparation method of the solubilizer in Comparative Example 3 includes the following steps:

[0068] Water was added to the reactor while heating and stirring. Heating was stopped when the temperature reached 50°C. Thiourea and sodium alginate were slowly added while stirring vigorously. After they were completely dissolved, the mixture was stirred at a constant temperature for 3 hours. Finally, carboxymethyl cellulose was added and the mixture was stirred at a constant temperature for another 3 hours. After cooling, the solubilizer was obtained.

[0069] Comparative Example 4

[0070] A solubilizer, by mass percentage, comprises the following components: 10% thiourea, 1% sodium alginate, 30% alkyl glycoside 1214, and 59% water.

[0071] The preparation method of the solubilizer in Comparative Example 4 includes the following steps:

[0072] Alkyl glycosides were added to the reactor while heating and stirring. Heating was stopped when the temperature reached 50°C. Thiourea and sodium alginate were added slowly while stirring vigorously. After they were completely dissolved, the mixture was kept at a constant temperature and stirred for 3 hours. Finally, water was added and the mixture was kept at a constant temperature and stirred for another 3 hours. After cooling, the solubilizer was obtained.

[0073] Comparative Example 5

[0074] A solubilizer, by mass percentage, comprises the following components: 12% thiourea, 4% sodium alginate, 25% alkyl glycoside 1214, and 59% carboxymethyl cellulose modifier.

[0075] Comparative Example 6

[0076] A solubilizer, by mass percentage, comprises the following components: thiourea 6%, sodium alginate 4%, alkyl glycoside 1214 15%, and carboxymethyl cellulose modifier 75%.

[0077] Comparative Example 7

[0078] A solubilizer, by mass percentage, comprises the following components: 0.5% thiourea, 4.5% sodium alginate, 15% alkyl glycoside 1214, and 80% carboxymethyl cellulose modifier.

[0079] The preparation methods of the solubilizers in Comparative Examples 5-7 include the following steps:

[0080] Alkyl glycosides were added to the reactor while heating and stirring. Heating was stopped when the temperature reached 50°C. Thiourea and sodium alginate were added slowly while stirring vigorously. After they were completely dissolved, the mixture was kept at a constant temperature and stirred for 3 hours. Finally, carboxymethyl cellulose was added and the mixture was kept at a constant temperature and stirred for another 3 hours. After cooling, the solubilizer was obtained.

[0081] Test case

[0082] A 30% hydrochloric acid solution was prepared as the acid standard test solution, and BASF LF221, a commonly used industrial cleaning agent that is not acid resistant, was selected as the cleaning agent.

[0083] Blank control group: Add the mixture of BASF LF221 and water (BASF LF221 mass fraction is 6%) to the prepared acidic standard test solution, stir evenly to disperse it, and observe whether the surfactant precipitates when it stands. If it precipitates, record the specific time.

[0084] Test groups 1-12: Add 6% BASF LF221 by mass to the prepared acidic standard test solution, and add the solubilizers for improving the acid resistance of industrial cleaning surfactants in Examples 1-5 and Comparative Examples 1-7 respectively. Stir evenly to disperse the surfactants, and observe whether surfactants precipitate out. If they precipitate out, record the specific time.

[0085] Commercial control group 13: Add 6% BASF LF221 to the prepared acidic standard test solution, add commercial solubilizer Dow H66, stir evenly to disperse it, and observe whether the surfactant precipitates when it stands. If it precipitates, record the specific time.

[0086] Commercial control group 14: Add 6% BASF LF221 to the prepared acidic standard test solution, add commercial solubilizer Haian Petrochemical MAP-3, stir evenly to disperse it, and observe whether the surfactant precipitates when it stands. If it precipitates, record the specific time.

[0087] The test results are as follows:

[0088] The solution in the blank control group separated into layers after standing for 0.05 h. The upper layer was the precipitated surfactant, and the lower layer was the aqueous phase, which showed a little turbidity.

[0089] The solution of test group 1 (Example 1) showed no stratification after standing for 10 hours, was uniformly dispersed, and was clear and transparent, indicating that BASF surfactant LF221 was stably dispersed.

[0090] The solution of test group 2 (Example 2) showed no stratification after standing for 10 hours, was uniformly dispersed, and was clear and transparent, indicating that BASF surfactant LF221 was stably dispersed.

[0091] The solution of test group 3 (Example 3) showed no stratification after standing for 10 hours, was uniformly dispersed, and was clear and transparent, indicating that BASF surfactant LF221 was stably dispersed.

[0092] The solution of test group 4 (Example 4) showed no stratification after standing for 10 hours, was uniformly dispersed, and was clear and transparent, indicating that BASF surfactant LF221 was stably dispersed.

[0093] The solution of test group 5 (Example 5) showed no stratification after standing for 10 hours, was uniformly dispersed, and was clear and transparent, indicating that BASF surfactant LF221 was stably dispersed.

[0094] After the solution of test group 6 (comparative example 1) was left to stand for 5.5 hours, it showed stratification. The upper layer was the surfactant layer and the lower layer was the aqueous phase layer. The aqueous phase layer was accompanied by a small amount of turbidity.

[0095] After the solution of test group 7 (comparative example 2) was left to stand for 4 hours, it showed stratification. The upper layer was the surfactant layer and the lower layer was the aqueous phase layer. The aqueous phase layer was accompanied by a small amount of turbidity.

[0096] After standing for 1.5 hours, the solution in test group 8 (comparative example 3) showed stratification, with the upper layer being the surfactant layer and the lower layer being the aqueous phase layer, accompanied by a small amount of turbidity dispersed in the aqueous phase layer.

[0097] After the solution in test group 9 (comparative example 4) was left to stand for 0.5 hours, it showed stratification. The upper layer was the surfactant layer and the lower layer was the aqueous phase layer. The aqueous phase layer was accompanied by a small amount of turbidity.

[0098] After the solution of test group 10 (comparative example 5) was left to stand for 2.5 hours, it showed stratification. The upper layer was the surfactant layer and the lower layer was the aqueous phase layer. The aqueous phase layer was accompanied by a small amount of turbidity.

[0099] After the solution of test group 11 (comparative example 6) was left to stand for 1.5 hours, it showed stratification. The upper layer was the surfactant layer and the lower layer was the aqueous phase layer. The aqueous phase layer was accompanied by a small amount of turbidity.

[0100] After the solution of test group 12 (comparative example 7) was left to stand for 5.5 hours, it showed stratification. The upper layer was the surfactant layer and the lower layer was the aqueous phase layer. The aqueous phase layer was accompanied by a small amount of turbidity.

[0101] The solution of commercial control group 13 (Dow H66) showed slight stratification after standing for 9.5 hours. A small amount of active agent was precipitated in the upper layer, and the lower layer was an aqueous phase with a small amount of turbidity dispersed in it.

[0102] After standing for 9 hours, the solution of commercial control group 14 (Hai'an Petrochemical MAP-3) showed slight stratification. A small amount of active agent was precipitated in the upper layer, and the lower layer was an aqueous phase with a small amount of turbidity dispersed in it.

[0103] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A solubilizer for improving the acid resistance of industrial cleaning surfactants, characterized in that, The solubilizer comprises, by mass percentage: 1-10% thiourea, 1-3% sodium alginate, 25-40% alkyl glycoside, and 50-70% modified carboxymethyl cellulose. The modified carboxymethyl cellulose was prepared by sequentially modifying carboxymethyl cellulose through hydroxyphosphorylation, weak sulfonation, and ammoniation. The carboxymethyl cellulose was modified by hydroxyphosphorylation using phosphorus pentoxide; the carboxymethyl cellulose was modified by weak sulfonation using ammonium xylenesulfonate; and the carboxymethyl cellulose was modified by ammoniation using ammonia. The reaction temperature for preparing the modified carboxymethyl cellulose was 70–80 °C. The preparation method of the modified carboxymethyl cellulose includes the following steps: S1. Add 5-10% water to the reactor, add 30-35% carboxymethyl cellulose to the water and start heating. Stop heating when the temperature reaches 70-80 ℃, keep the temperature constant and stir for 5-7 h to obtain carboxymethyl cellulose aqueous solution; S2. Add 2-5% phosphorus pentoxide to the carboxymethyl cellulose aqueous solution obtained in step S1, and continue stirring for 10-12 h after all the phosphorus pentoxide has dissolved. S3. Add 3-4% ammonium xylenesulfonate to the mixed solution obtained in step S2, and continue stirring for 3-5 hours; S4. Add 2-5% ammonia water to the mixed solution obtained in step S3, add the remaining water, and continue stirring for 10-12 h. After the reaction is completed, the modified carboxymethyl cellulose is obtained.

2. The solubilizer for improving the acid resistance of industrial cleaning agents according to claim 1, characterized in that, The alkyl glycoside is alkyl glycoside 1214.

3. The method for preparing the solubilizer for improving the acid resistance of industrial cleaning surfactants as described in claim 1 or 2, characterized in that, Includes the following steps: Thiourea, sodium alginate, and carboxymethyl cellulose modifier were added sequentially to an alkyl glycoside, and the mixture was then used to obtain the solubilizer that improves the acid resistance of the industrial cleaning agent.

4. The preparation method according to claim 3, characterized in that, The mixing temperature of the solubilizer used to prepare the acid resistance of the industrial cleaning agent is 45~55 ℃.