Surface active composition with oil removal and defoaming functions and preparation method thereof

Abstract

The invention relates to the field of functional auxiliaries, and provides a surface active composition with oil removal and defoaming functions and a preparation method thereof.The surface active composition with the oil removal and defoaming functions is prepared from, by weight, 4-10 parts of lauryl alcohol random polyether, 2-6 parts of glycerol random polyether and 1-3 parts of modified xanthan gum; and 0.5-2 parts of a composite penetrant. The surface active composition provided by the invention has oil removal and defoaming functions, also has good environmental protection property, suspension property and permeability, and can be widely applied to cleaning agents.

Description

Technical Field

[0001] The present invention relates to the field of functional additives, and in particular to a surfactant composition with degreasing and defoaming functions and a preparation method thereof. Background Art

[0002] Cleaning agent is a key auxiliary material in the production process of aluminum cans. It can remove residual lubricating oil, aluminum chips and oxide layer on the surface of the can after stamping and stretching. It has a vital impact on ensuring the reliability of subsequent coating and printing processes.

[0003] In order to make the cleaning agent have a more efficient and rapid degreasing effect on aluminum cans and avoid the generation of a large amount of foam during the cleaning process, the selection of surfactant components in the cleaning agent is crucial. Suitable surfactants can achieve the degreasing effect by reducing interfacial tension and enhancing emulsification. Currently, the surfactant commonly used in cleaning agents on the market is alkylphenol polyoxyethylene ether. Although it can play a role in rapid degreasing, there are risks and hidden dangers of environmental pollution after the discharge of wastewater containing alkylphenol polyoxyethylene ether. It will also increase the rinsing pressure after cleaning high-speed production lines. At the same time, a large amount of foam is easily generated in the rinsing water under low concentration conditions. In addition, the suspension and permeability of the surfactant components in the cleaning agent still need to be improved, which will to a certain extent limit the improvement of the cleaning agent's degreasing and defoaming functions.

[0004] Patent CN 115707765 A discloses a low-foaming, alkali-resistant, and oil-removing surfactant composition and preparation method. The surfactant composition disclosed in the application includes 35-45 parts of an alkaline substance, 4.5-6 parts of anionic surfactants, and 9-12 parts of nonionic surfactants. By mixing the nonionic surfactants and anionic surfactants in a certain ratio, the complementary effect between the different surfactants is enhanced, effectively improving the alkali resistance and oil-removing ability of the overall surfactant. However, the anionic surfactant used in the application is one or more of OP-10, nonylphenol polyoxyethylene ether, or fatty alcohol polyvinyl ether. Among them, nonylphenol polyoxyethylene ether is an alkylphenol polyoxyethylene ether. Adding it to the cleaning agent will cause a sharp increase in wastewater treatment pressure, posing risks and hidden dangers of environmental pollution.

[0005] Therefore, there is an urgent need on the market for a surfactant composition that has both oil removal and defoaming functions and good environmental protection, suspension and permeability. Summary of the Invention

[0006] In response to the problems existing in the prior art, the present invention uses lauryl alcohol random polyether and propylene glycol random polyether as the main components, combined with modified xanthan gum and a composite penetrant to form a surfactant composition, which has both oil removal and defoaming functions while also having good environmental protection, suspension and permeability.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] On the one hand, the present invention provides a surface active composition with both oil removal and defoaming functions. By weight, the surface active composition with both oil removal and defoaming functions includes the following raw materials: 4 - 10 parts of random polyether of lauryl alcohol, 2 - 6 parts of random polyether of glycerol, and 1 - 3 parts of modified xanthan gum.

[0009] The random polyether of lauryl alcohol can reduce the interfacial tension, disperse the oil stain into nanoscale particles through micellar solubilization, quickly peel the oil stain from the tank surface to achieve the oil removal effect, and still maintain a good oil stain peeling effect at 25 - 40 °C. And at 25 °C, it can inhibit the foam stability and reduce the foam residue from flowing into the subsequent process; the random polyether of glycerol has strong emulsifying properties, can quickly disperse and emulsify the lubricating oil and other oil impurities dissolved in the cleaning agent, prevent the precipitation of oil impurities such as lubricating oil during cleaning and re - adhesion to the tank body to cause secondary pollution, and also has a certain permeability, has a dissolving effect on high - viscosity oil stains, and has a long - term foam inhibition effect at extremely low concentrations to prevent foam from flowing into the subsequent passivation process during cleaning and rinsing. In addition, both the random polyether of lauryl alcohol and the random polyether of glycerol have excellent biodegradability, which can make the surface active composition have good environmental protection.

[0010] In some embodiments of the present invention, the preparation method of the modified xanthan gum includes the following steps:

[0011] (1) Add xanthan gum to deionized water, stir, add 2 - acrylamide - 2 - methylpropanesulfonic acid, stir, introduce an inert gas, at 55 - 65 °C, add ammonium cerium nitrate, stir, add potassium persulfate and sodium bisulfite, stir for 3 - 4 h, cool to room temperature and then add to a methanol aqueous solution, stir, centrifuge, filter, and dry to obtain product 1 for standby;

[0012] (2) Add hexadecyl tertiary amine to an ethanol aqueous solution, adjust the pH = 6 - 7 by adding glacial acetic acid while stirring, heat up to 55 - 65 °C, add epichlorohydrin, stir for 3 - 4 h to obtain product 2 for standby;

[0013] (3) Take the product 1 of step (1), add an ethanol aqueous solution, add an aqueous sodium hydroxide solution while stirring, stir, add the product 2 of step (2), react for 4 - 5 h, cool to room temperature, wash, filter by suction, and dry to obtain the modified xanthan gum.

[0014] In some embodiments of the present invention, in step (1), the mass ratio of xanthan gum to 2 - acrylamide - 2 - methylpropanesulfonic acid is 1:(2.5 - 3.5).

[0015] Preferably, in the step (1), the mass ratio of xanthan gum to 2-acrylamido-2-methylpropanesulfonic acid is 1:3.

[0016] In some embodiments of the present invention, in the step (2), the mass ratio of epichlorohydrin to hexadecyltrimethylammonium is 1:(2.5 - 4).

[0017] Preferably, in the step (2), the mass ratio of epichlorohydrin to hexadecyltrimethylammonium is 1:3.

[0018] In some embodiments of the present invention, in the step (3), the mass ratio of product 1 to product 2 is 1:(5.5 - 6.5).

[0019] Preferably, in the step (3), the mass ratio of product 1 to product 2 is 1:5.

[0020] Xanthan gum has good suspension performance. When used in combination with lauryl alcohol random polyether and glycerol random polyether, it can improve the rheological properties of the system and thus enhance the oil removal efficiency. However, although xanthan gum has hydrophilicity, its solubility, dispersibility, and stability still need to be improved.

[0021] The applicant first selected a specific type of 2-acrylamido-2-methylpropanesulfonic acid as a graft monomer to graft-modify xanthan gum, introducing hydrophilic groups such as amide groups and sulfonic acid groups to accelerate the dissolution rate of xanthan gum and avoid the problem of its aggregation into lumps. However, the improvement in hydrophilicity may cause a decrease in the overall oil removal effect of the surface active composition. Further, the applicant prepared an etherifying reagent using hexadecyltrimethylammonium and epichlorohydrin as raw materials, and by controlling the ratio between this etherifying reagent and the xanthan gum graft-modified with the above-mentioned 2-acrylamido-2-methylpropanesulfonic acid, a certain amount of hydrophobic alkyl long chains were introduced on the basis of ensuring the water solubility of the modified xanthan gum, shielding some hydrophilic groups of xanthan gum and changing its colloidal particle interface structure, thereby improving the dispersibility of xanthan gum. In addition, the applicant unexpectedly found that the suspension performance of the modified xanthan gum can play a long-term and stable role. It is speculated that the possible reasons are as follows: on the one hand, the electrostatic interaction between the anionic functional groups (-COOC-) and cationic substituents (quaternary ammonium salts) in the structure of the modified xanthan gum can greatly enhance the network structure of the modified xanthan gum, thereby improving the stability of the modified xanthan gum; on the other hand, there may be a certain hydrogen bond interaction between the hydroxyl and carboxyl groups in the xanthan gum structure itself and the amine groups introduced by the modification, thereby improving the stability of the suspending agent.

[0022] In some embodiments of the present invention, by weight, the raw materials further include 0.5 - 2 parts of a composite penetrant.

[0023] In some embodiments of the present invention, the composite penetrant is a mixture of urea-modified carbon alcohol polyoxyethylene ether and cocamidopropyl betaine, and the mass ratio of the two is 1:(0.1 - 0.3).

[0024] Preferably, the composite penetrant is a mixture of urea-modified carbon alcohol polyoxyethylene ether and cocamidopropyl betaine, and the mass ratio is 1:0.25.

[0025] In some embodiments of the present invention, the preparation method of the urea-modified carbon alcohol polyoxyethylene ether comprises the following steps:

[0026] Add isomeric decyl alcohol polyoxyethylene ether and 3-(2-hydroxyethyl)-1,1-dimethylurea into a reaction vessel, add DMF, reflux and react at 125 - 140 °C for 5 - 7 h, filter, and distill under reduced pressure to obtain urea-modified alkyl polyoxyethylene ether.

[0027] In some embodiments of the present invention, the mass ratio of the isomeric decyl alcohol polyoxyethylene ether and 3-(2-hydroxyethyl)-1,1-dimethylurea is 1:(0.4 - 0.7).

[0028] Preferably, the mass ratio of the isomeric decyl alcohol polyoxyethylene ether and 3-(2-hydroxyethyl)-1,1-dimethylurea is 1:0.5.

[0029] The applicant designed and added a composite penetrant to the surfactant composition, and further improved the oil removal performance of the surfactant composition from the perspective of improving the permeability. Isomeric decyl alcohol polyoxyethylene ether has good permeability, but it will generate certain bubbles. The applicant selected a specific type of 3-(2-hydroxyethyl)-1,1-dimethylurea to modify the isomeric decyl alcohol polyoxyethylene ether and controlled the ratio between the two to synthesize urea-modified carbon alcohol polyoxyethylene ether, making it have an appropriate content of urea groups, tertiary amine groups, alkyl long chains and hydroxyl structures, so that the urea-modified carbon alcohol polyoxyethylene ether achieves the balance of hydrophobicity and hydrophilicity, and thus has both good permeability and low foaming property; further, the applicant compounded urea-modified carbon alcohol polyoxyethylene ether and cocamidopropyl betaine as a composite penetrant, which has the characteristics of synergistically enhancing permeability and low foaming property at the same time.

[0030] On the other hand, the present invention also provides a preparation method of the surfactant composition with both oil removal and defoaming functions as described in the above technical solution, comprising the following steps:

[0031] First, mix glycerol random polyether and the composite penetrant, stir, and then add lauryl alcohol random polyether and modified xanthan gum, and stir to obtain the surfactant composition with both oil removal and defoaming functions.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] (1) The present invention uses lauryl alcohol random polyether and glycerol random polyether as the main components, and is combined with modified xanthan gum and a composite penetrant to form a surface active composition. Through the synergistic effect among the components, it has the functions of degreasing and defoaming, and at the same time has good environmental protection, suspension and permeability characteristics, and can be widely used in cleaning agents.

[0034] (2) The present invention designs and synthesizes modified xanthan gum as a suspending agent. First, a specific type of 2-acrylamide-2-methylpropanesulfonic acid is selected as a graft monomer to graft-modify xanthan gum, which accelerates the dissolution rate of xanthan gum and avoids the problem of its aggregation into lumps. Further, the applicant uses hexadecyl tertiary amine and epichlorohydrin as raw materials to prepare an etherifying reagent and controls the ratio between it and the xanthan gum graft-modified with the above 2-acrylamide-2-methylpropanesulfonic acid. On the basis of ensuring the water solubility of the modified xanthan gum, a certain amount of hydrophobic alkyl long chain is introduced to shield some hydrophilic groups of xanthan gum and change the interfacial structure of its colloidal particles, thereby improving the dispersibility of xanthan gum.

[0035] (3) The present invention combines urea-modified alkyl polyoxyethylene ether and cocamidopropyl betaine to form a composite penetrant, which has the advantage of low foaming, and can play a role in synergistically improving penetration. And when preparing the surface active composition, it is first mixed with glycerol random polyether to further improve the permeability. Specific embodiments

[0036] The following will describe the present invention in combination with specific implementation schemes. It should be noted that the following examples are examples of the present invention, only used to illustrate the present invention, and not used to limit the present invention. Without departing from the gist or scope of the present invention, other combinations and various improvements within the concept of the present invention can be made.

[0037] [[ID=IS]]In the following examples and comparative examples, except for modified xanthan gum and urea-modified carbon alcohol polyoxyethylene ether, the compound monomers and related reagents used can be purchased from the market. Among them, lauryl alcohol random polyether is customized by Hai'an Petrochemical Factory in Jiangsu Province, with an EO number of 13 and a PO number of 3; glycerol random polyether is GPE-3000, purchased from Hai'an Petrochemical Factory in Jiangsu Province; the model of isodecyl alcohol polyoxyethylene ether is XP-30, purchased from Jining Tangyi Chemical Co., Ltd.; sulfuric acid is 98wt% industrial-grade sulfuric acid.

[0038] Preparation Example 1

[0039] The synthesis method of modified xanthan gum A includes the following steps:

[0040] (1) Add 5 g of xanthan gum to 200 ml of deionized water, stir for 30 min, add 15 g of 2-acrylamido-2-methylpropanesulfonic acid, stir for 2 h, introduce nitrogen gas, and at 60 °C, add 0.2 g of ammonium cerium nitrate, stir for 30 min, add 1.5 g of potassium persulfate and 1 g of sodium bisulfite, stir for 3.5 h, cool to room temperature and then add it to 300 ml of 70 wt% methanol aqueous solution, stir for 30 min, centrifuge, filter, and dry at 60 °C for 24 h to obtain Product 1 for standby;

[0041] (2) Add 30 g of hexadecyltrimethylammonium to 70 ml of 60 wt% ethanol aqueous solution, adjust the pH to 6.5 by adding glacial acetic acid while stirring, raise the temperature to 60 °C, add 10 g of epichlorohydrin, and stir for 3.5 h to obtain Product 2 for standby;

[0042] (3) Take 5 g of the product 1 from step (1), add 50 ml of 60 wt% ethanol aqueous solution, add 50 ml of 0.1 mol / L sodium hydroxide aqueous solution while stirring, stir for 1 h, add 30 g of the product 2 from step (2), react for 4.5 h, cool to room temperature, wash with absolute ethanol 3 times, filter by suction, and dry at 60 °C for 10 h to obtain modified xanthan gum A.

[0043] Preparation Example 2

[0044] For modified xanthan gum B, the specific implementation method is the same as that of modified xanthan gum A, the difference is that: in step (1), the mass of 2-acrylamido-2-methylpropanesulfonic acid is replaced with 11.5 g.

[0045] Preparation Example 3

[0046] For modified xanthan gum C, the specific implementation method is the same as that of modified xanthan gum A, the difference is that: in step (2), the mass of hexadecyltrimethylammonium is replaced with 24 g.

[0047] Preparation Example 4

[0048] For modified xanthan gum D, the specific implementation method is the same as that of modified xanthan gum A, the difference is that: in step (3), the mass of the product 2 is replaced with 26 g.

[0049] Preparation Example 5

[0050] The synthesis method of urea-modified carbon alcohol polyoxyethylene ether A includes the following steps:

[0051] Add 30 g of isomeric decyl alcohol polyoxyethylene ether and 15 g of 3-(2-hydroxyethyl)-1,1-dimethylurea to a reaction vessel, add 300 ml of DMF, reflux and react at 130 °C for 6 h, filter, and distill under reduced pressure to obtain urea-modified carbon alcohol polyoxyethylene ether A.

[0052] Preparation Example 6

[0053] Urea-modified carbon alcohol polyoxyethylene ether B. The specific implementation method is the same as that of urea-modified carbon alcohol polyoxyethylene ether A, except that: the mass of 3-(2-hydroxyethyl)-1,1-dimethylurea is replaced with 10 g.

[0054] Example 1

[0055] A surface active composition with both oil removal and defoaming functions. By weight, the surface active composition with both oil removal and defoaming functions includes the following raw materials: 6 parts of lauryl alcohol random polyether, 3.5 parts of glycerol random polyether, 2 parts of modified xanthan gum A, and 1.5 parts of composite penetrant.

[0056] The composite penetrant is a mixture of urea-modified carbon alcohol polyoxyethylene ether A and cocamidopropyl betaine, and the mass ratio is 1:0.25.

[0057] The preparation method of the surface active composition with both oil removal and defoaming functions in this example includes the following steps:

[0058] First, mix glycerol random polyether and the composite penetrant, stir evenly, then add lauryl alcohol random polyether and modified xanthan gum A, and stir evenly to obtain the surface active composition with both oil removal and defoaming functions.

[0059] Example 2

[0060] A surface active composition with both oil removal and defoaming functions. By weight, the surface active composition with both oil removal and defoaming functions includes the following raw materials: 4 parts of lauryl alcohol random polyether, 2 parts of glycerol random polyether, 1 part of modified xanthan gum A, and 0.5 part of composite penetrant.

[0061] The composite penetrant is a mixture of urea-modified carbon alcohol polyoxyethylene ether A and cocamidopropyl betaine, and the mass ratio is 1:0.1.

[0062] The preparation method of the surface active composition with both oil removal and defoaming functions in this example is the same as that in Example 1.

[0063] Example 3

[0064] A surface active composition with both oil removal and defoaming functions. By weight, the surface active composition with both oil removal and defoaming functions includes the following raw materials: 10 parts of lauryl alcohol random polyether, 6 parts of glycerol random polyether, 3 parts of modified xanthan gum A, and 2 parts of composite penetrant.

[0065] The composite penetrant is a mixture of urea-modified carbon alcohol polyoxyethylene ether A and cocamidopropyl betaine, and the mass ratio is 1:0.3.

[0066] In this embodiment, the preparation method of the surfactant composition with both oil removal and defoaming functions is the same as that in Example 1.

[0067] Example 4

[0068] A surfactant composition with both oil removal and defoaming functions, calculated by weight, the surfactant composition with both oil removal and defoaming functions includes the following raw materials: 6 parts of random polyether of lauryl alcohol, 3.5 parts of random polyether of glycerol, and 2 parts of modified xanthan gum A.

[0069] The preparation method of the surfactant composition with both oil removal and defoaming functions in this embodiment includes the following steps:

[0070] Mix the random polyether of glycerol, the random polyether of lauryl alcohol and modified xanthan gum A, and stir evenly to obtain the surfactant composition with both oil removal and defoaming functions.

[0071] Example 5

[0072] This embodiment provides a surfactant composition with both oil removal and defoaming functions and its preparation method. The specific implementation manner is the same as that in Example 1, except that modified xanthan gum B is used to replace modified xanthan gum A in equal amount.

[0073] Example 6

[0074] This embodiment provides a surfactant composition with both oil removal and defoaming functions and its preparation method. The specific implementation manner is the same as that in Example 1, except that modified xanthan gum C is used to replace modified xanthan gum A in equal amount.

[0075] Example 7

[0076] This embodiment provides a surfactant composition with both oil removal and defoaming functions and its preparation method. The specific implementation manner is the same as that in Example 1, except that modified xanthan gum D is used to replace modified xanthan gum A in equal amount.

[0077] Example 8

[0078] This embodiment provides a surfactant composition with both oil removal and defoaming functions and its preparation method. The specific implementation manner is the same as that in Example 1, except that the mass ratio of urea-modified carbon alcohol polyoxyethylene ether A to cocamidopropyl betaine in the composite penetrant is 1:0.07.

[0079] Example 9

[0080] This embodiment provides a surface active composition with both oil removal and defoaming functions and a preparation method thereof. The specific implementation manner is the same as that of Embodiment 1, except that the mass ratio of urea-modified carbon alcohol polyoxyethylene ether A to cocamidopropyl betaine in the composite penetrant is 1:0.33.

[0081] Example 10

[0082] This embodiment provides a surface active composition with both oil removal and defoaming functions and a preparation method thereof. The specific implementation manner is the same as that of Embodiment 1, except that urea-modified carbon alcohol polyoxyethylene ether B is used to replace urea-modified carbon alcohol polyoxyethylene ether A in equal amount.

[0083] Example 11

[0084] This embodiment provides a surface active composition with both oil removal and defoaming functions and a preparation method thereof. The specific implementation manner is the same as that of Embodiment 1, except that isomeric decyl alcohol polyoxyethylene ether is used to replace urea-modified carbon alcohol polyoxyethylene ether A in equal amount.

[0085] Comparative Example 1

[0086] This comparative example provides a surface active composition with both oil removal and defoaming functions and a preparation method thereof. The specific implementation manner is the same as that of Embodiment 1, except that xanthan gum is used to replace modified xanthan gum A in equal amount.

[0087] Performance Test

[0088] The oil removal, defoaming, suspension and penetration performances of the surface active compositions described in the above Embodiments 1-11 and Comparative Example 1 were tested, and the test results are shown in Table 1.

[0089] 9.5 g of the surface active composition in Embodiments 1-11 and Comparative Example 1, 40 g of sulfuric acid, 4.5 g of citric acid, 1.2 g of titanium sulfate and 45 g of water were respectively taken and mixed evenly to obtain a cleaning agent for standby.

[0090] (1) Oil removal performance

[0091] The 330 ml aluminum easy-open cans were cleaned with the cleaning agent, and the application conditions were as follows:

[0092] Slotting concentration: 2% (V / V);

[0093] Use temperature: 40 °C;

[0094] Spraying pressure: upper spray: 40 - 45 PSI; lower spray: 30 - 45 PSI;

[0095] Treatment time: 60 s;

[0096] Line speed: 3200 cans / minute;

[0097] After adding the cleaning agent for a certain period of time, when the aluminum ion content in the tank is 0.2 - 0.3 g / L, the degreasing effect is tested using a Dyno pen.

[0098] (2) Defoaming performance

[0099] The defoaming performance of the cleaning agent is judged by referring to the standard GB / T 4323.1 - 1999, and the defoaming performance is evaluated by measuring the height of the residual foam.

[0100] (3) Suspension performance

[0101] The suspension performance is judged by measuring the static suspension rate. The cleaning agent is filled into a 100 ml stoppered graduated cylinder, stirred evenly, and left to stand at 25°C ± 5°C for 24 h. Then, the volume of the upper clarified liquid in the graduated cylinder is measured. The suspension rate = (100 - V) / 100 × 100%, where V is the volume (ml) of the upper clarified liquid of the cleaning agent sample in the graduated cylinder.

[0102] (4) Penetration performance

[0103] The penetration performance is indirectly reflected by the level of the degreasing performance of the cleaning agent. The higher the penetration performance, the better the cleaning agent can dissolve the oil stain, and thus the better the degreasing effect of the cleaning agent.

[0104] Table 1

[0105]

[0106]

[0107] As can be seen from the data in Table 1, the surface active compositions in Examples 1-3 of the present invention as a whole have good oil removal, defoaming, suspension and penetration properties. Among them, the composite penetrant is not added to the surface active composition in Example 4, which causes the dyne value of the surface active composition to decrease significantly, that is, the oil removal performance decreases significantly, and to a certain extent, the defoaming performance is affected; in Examples 5-7, the addition ratios of 2-acrylamide-2-methylpropanesulfonic acid, hexadecyltrimethylamine and etherifying reagent in the synthesis process of modified xanthan gum are changed, resulting in poor improvement of the solubility, dispersibility and stability of modified xanthan gum, leading to a decrease in the suspension of modified xanthan gum, and further leading to a significant decrease in the suspension performance of the surface active composition, and further causing a certain degree of decrease in the oil removal performance of the cleaning agent; Comparative Example 1 uses xanthan gum to equally replace modified xanthan gum A, and the test finds that the suspension performance of the surface active composition shows poor results; in Examples 8-9, the mass ratio between urea-modified carbon alcohol polyoxyethylene ether A and cocamidopropyl betaine in the composite penetrant is changed, resulting in a weakening of the synergistic effect between the composite penetrants; in Example 10, the modification ratio of 3-(2-hydroxyethyl)-1,1-dimethylurea to isomeric decyl alcohol polyoxyethylene ether in the synthesis process of urea-modified carbon alcohol polyoxyethylene ether is changed, resulting in the inability of urea-modified carbon alcohol polyoxyethylene ether to have both good permeability and low foaming properties; in Example 11, isomeric decyl alcohol polyoxyethylene ether is used to equally replace urea-modified carbon alcohol polyoxyethylene ether A, resulting in an increase in the foam amount of the composite penetrant. Therefore, it is found from the test results that the oil removal effect and defoaming performance of the cleaning agents in Examples 8-11 become worse.

[0108] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A surface active composition with both oil removal and defoaming functions, characterized in that, By weight parts, the surfactant composition with both oil removal and defoaming functions comprises the following raw materials: 4-10 parts of random polyether of lauryl alcohol, 2-6 parts of random polyether of glycerol, and 1-3 parts of modified xanthan gum.

2. The surface active composition with oil removal and defoaming functions according to claim 1, characterized in that The preparation method of the modified xanthan gum comprises the following steps: (1) Add xanthan gum into deionized water, stir, add 2-acrylamide-2-methylpropanesulfonic acid, stir, introduce inert gas, under the condition of 55-65 °C, add ammonium cerium nitrate, stir, add potassium persulfate and sodium bisulfite, stir for 3-4 h, cool to room temperature and then add into methanol aqueous solution, stir, centrifuge, filter, and dry to obtain product 1 for standby; (2) Add hexadecyl tertiary amine into ethanol aqueous solution, adjust the pH to 6-7 by adding glacial acetic acid while stirring, heat up to 55-65 °C, add epichlorohydrin, stir for 3-4 h to obtain product 2 for standby; (3) Take product 1 from step (1), add ethanol aqueous solution, add sodium hydroxide aqueous solution while stirring, stir, add product 2 from step (2), react for 4-5 h, cool to room temperature, wash, filter by suction, and dry to obtain the modified xanthan gum.

3. The surface active composition with oil removal and defoaming functions according to claim 2, characterized in that, In the step (1), the mass ratio of xanthan gum to 2-acrylamide-2-methylpropanesulfonic acid is 1:(2.5-3.5).

4. The surface active composition with both oil removal and defoaming functions according to claim 2, characterized in that, In the step (2), the mass ratio of epichlorohydrin to hexadecyl tertiary amine is 1:(2.5-4).

5. The surface active composition with oil removal and defoaming functions according to claim 2, characterized in that, In the step (3), the mass ratio of product 1 to product 2 is 1:(5.5-6.5).

6. The surface active composition with oil removal and defoaming functions according to claim 1, characterized in that, By weight parts, the raw materials further comprise 0.5-2 parts of compound penetrant.

7. The surface active composition with oil removal and defoaming functions according to claim 6, characterized in that, The compound penetrant is a mixture of urea-modified carbon alcohol polyoxyethylene ether and cocamidopropyl betaine, and the mass ratio of the two is 1:(0.1-0.3).

8. The surface active composition with degreasing and defoaming functions according to claim 7, characterized in that, The preparation method of the urea-modified carbon alcohol polyoxyethylene ether comprises the following steps: Add isomeric decyl alcohol polyoxyethylene ether and 3-(2-hydroxyethyl)-1,1-dimethylurea into a reaction vessel, add DMF, reflux and react at 125-140 °C for 5-7 h, filter, and distill under reduced pressure to obtain urea-modified alkyl polyoxyethylene ether.

9. The surface active composition having both defoaming and oil removal functions according to claim 8, characterized in that, The mass ratio of isomeric decyl alcohol polyoxyethylene ether to 3-(2-hydroxyethyl)-1,1-dimethylurea is 1:(0.4-0.7).

10. A method for preparing a surface active composition having both oil removal and defoaming functions according to any one of claims 6-9, characterized in that, Comprises the following steps: First, mix the random polyether of glycerol and the compound penetrant, stir, and then add the random polyether of lauryl alcohol and the modified xanthan gum, stir to obtain the surfactant composition with both oil removal and defoaming functions.

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