Combined detergent, hot rolling oil and application thereof

Abstract

The invention provides a combined clearing agent, hot rolling oil and application of the combined clearing agent and the hot rolling oil. The combined clearing agent comprises the following components in parts by weight: 0.1-5 parts of a component A and 0.1-15 parts of a component B, the component A is prepared from polyethyleneimine and an etherate of C8-C18 fatty alcohol; and the component B comprises fatty alcohol polyether phosphate and / or ammonium phosphate. The composite detergent provided by the invention can improve the dispersing performance of the aluminum powder in the rolling emulsion, maintain good wetting and stable dispersion of the aluminum powder in the rolling emulsion, and avoid deposition and scaling; the efficiency of the oil skimming or filtering procedure can be improved to the maximum extent, operation is easy and convenient, oil skimming or filtering operation can be repeatedly conducted, and the low-loss purification process is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of metal heat processing, and in particular relates to a combined detergent, hot rolling oil and uses thereof. Background Art

[0002] In the hot rolling process of pure aluminum and aluminum alloy, soap-based emulsifiable oil is mainly used. Soap-based emulsifiable oil usually includes the product of the neutralization reaction of fatty acids and organic amines (soap base). The soap-based emulsifiable oil is mixed with water to form an emulsion of a certain concentration, which is called soap-based rolling emulsion, which is used to provide lubrication, cooling and cleaning. Soap-based rolling emulsion has the characteristics of balanced lubrication and cooling performance and strong adjustability. It can react with aluminum powder produced by rolling to form metal soap substances, promote the agglomeration of aluminum powder or the formation of sludge, so that it can be controlled through skimming or filtration processes, but the agglomeration of aluminum powder or the formation of sludge often requires a window period; and in some cases, it is difficult to form metal soap substances, making it difficult to further control and remove aluminum powder, making the aluminum powder control effect of soap-based rolling emulsion unstable, and the aluminum powder cannot be completely agglomerated or form sludge, but continues to accumulate in the emulsion, which in turn affects the cleanliness of the emulsion.

[0003] In addition, since soap-based rolling emulsion needs to be recycled, daily maintenance is very important to ensure its good and stable performance. On the one hand, the effective components of soap-based rolling emulsion should be replenished and updated in time to ensure the unchanged performance; on the other hand, various "impurities" mixed in soap-based rolling emulsion should be effectively removed to maintain the cleanliness of the emulsion. While meeting the requirements of high output (high throughput), high surface quality and high stability, the cleaning process of soap-based rolling emulsion is still one of the key issues currently faced by many customers. Maintaining the cleanliness of rolling emulsion requires not only the effective removal of foreign "impurities" in the emulsion, but also the "cleaning" process is convenient and easy to operate, and no additional waste is generated as much as possible. If the aluminum powder in the rolling emulsion cannot be effectively controlled, it will directly affect the surface quality of pure aluminum and aluminum alloy plates, and the surface quality of the plate is one of the most important criteria for judging the rolling process of pure aluminum and aluminum alloys.

[0004] The traditional filtration process cannot meet the control requirements of aluminum powder in the rolling emulsion, which in turn affects the cleanliness of the equipment and the cleanliness of the plate surface, affecting the quality of the plate surface; and the skimming or replacement process, although it can effectively remove aluminum powder, but the effective ingredients are also removed, resulting in high fuel consumption and a large amount of waste liquid, which is not conducive to the company's cost reduction and efficiency improvement, and is not in line with sustainable development goals such as energy conservation and emission reduction.

[0005] CN110434184A discloses a surface cleaning control process for 5505 alloy for mirror oxidation, wherein the viscosity of the hot rolling emulsion is less than 50 cSt. Although this technical solution achieves the cleaning of mirror rolled finished products, the preparation process conditions are relatively harsh, and sometimes a large amount of emulsion replacement is required to achieve the hot rolling emulsion viscosity of less than 50 cSt.

[0006] Therefore, there is a need in the art to develop a combined detergent that can improve the dispersion and wetting properties of aluminum powder in rolling emulsion and improve the efficiency of skimming or filtering processes. Summary of the invention

[0007] In view of the deficiencies in the prior art, the object of the present invention is to provide a combined detergent, hot rolling oil and applications thereof, wherein the combined detergent can improve the dispersion performance of aluminum powder in the rolling emulsion, maintain good wetting and stable dispersion of the aluminum powder in the rolling emulsion, and avoid deposition and scaling; it can maximize the efficiency of the skimming or filtering process, is easy to operate and can perform skimming or filtering operations repeatedly, thereby achieving a low-loss purification process.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] In a first aspect, the present invention provides a combination detergent, comprising the following components in parts by weight: 0.1-5 parts of component A (for example, 0.5 parts, 1 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts or 4.5 parts, etc.) and 0.1-15 parts of component B (for example, 2 parts, 4 parts, 6 parts, 8 parts, 10 parts, 12 parts or 14 parts, etc.).

[0010] The A component includes polyethyleneimine and an etherified product of C8-C18 (e.g., C9, C10, C11, C12, C13, C14, C15, C16 or C17, etc.) fatty alcohol;

[0011] The B component includes fatty alcohol polyether phosphate and / or amine phosphate.

[0012] In the present invention, the amine in the polyethyleneimine structure in the component A can change the surface charge of the oil phase of the rolling emulsion, so that the oil phase tends to be positively charged; the component B can modify the surface of the aluminum powder, convert the aluminum powder into an ionic state, and make the aluminum powder tend to be negatively charged; the compounding of the components A and B can combine the aluminum powder with a certain oil, so that the aluminum powder is fully wetted in the rolling emulsion, and the aluminum powder is stably dispersed in the emulsion system. The combined detergent can improve the compatibility of the rolling emulsion with the aluminum powder generated in the rolling process, improve the dispersibility of the aluminum powder in the rolling emulsion, maintain the good wetting and stable dispersion of the aluminum powder in the rolling emulsion, and avoid deposition and scaling. By adjusting the ratio of the component A to the component B, on the basis of achieving the wetting and dispersibility, the aluminum powder is floated on the surface by standing still, and the aluminum powder is skimmed. Thereby, the efficiency of the skimming or filtering process is improved under the condition of simple and repeatable operation, and a low-loss purification process is achieved. In the combined detergent, component A accounts for 0.1-5 parts, and component B accounts for 0.1-15 parts. If the weight proportion of component A is too large, it is easy to cause demulsification, and the oil phase is completely precipitated, causing concentration response problems; if the weight proportion of component B is too large, it affects the wetting and dispersion properties, and the aluminum powder is easy to agglomerate and scale.

[0013] Preferably, the polyethyleneimine has a structure as shown in Formula 1 below, and a number average molecular weight of 5000-10000, for example, 5500, 6000, 6500, 7000, 7500, 8000, 8500, 9000 or 9500.

[0014]

[0015] Preferably, the etherified product of C8-C18 fatty alcohol has a structure as shown in Formula 2 below.

[0016]

[0017] In Formula 2, n is an integer of 3-10 (e.g., 4, 5, 6, 7, 8 or 9), and R is an alkyl group of C8-C18 (e.g., C9, C10, C11, C12, C13, C14, C15, C16 or C17).

[0018] Preferably, the fatty alcohol polyether phosphate includes monosubstituted phosphate and / or disubstituted phosphate.

[0019] Preferably, the monosubstituted phosphate has a structure as shown in Formula 3 below.

[0020]

[0021] In Formula 3, n is an integer of 3-16 (e.g., 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15, etc.), and R1 is an alkyl group of C12-C17 (e.g., C13, C14, C15 or C16, etc.) or an alkenyl group of C12-C17 (e.g., C13, C14, C15 or C16, etc.).

[0022] Preferably, the disubstituted phosphate has a structure as shown in Formula 4 below.

[0023]

[0024] In Formula 4, n is an integer of 3-16 (e.g., 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15, etc.), and R2 and R3 are each independently selected from a C12-C14 (e.g., C13, etc.) alkyl group.

[0025] Preferably, the amine phosphate has a structure as shown in Formula 5 below.

[0026]

[0027] In formula 5, R4 is a C12-C18 (e.g., C13, C14, C15, C16 or C17, etc.) alkyl group, and R5 and R6 are each independently selected from H or a C2-C17 (e.g., C4, C6, C8, C10, C12, C14 or C16, etc.) alkyl group.

[0028] Preferably, the mass ratio of the fatty alcohol polyether phosphate to the amine phosphate is 1:10 to 10:1, for example, 1:9, 1:7, 1:5, 1:3, 1:1, 3:1, 5:1, 7:1 or 9:1.

[0029] Preferably, based on the total mass of component A as 100%, the mass percentage of the polyethyleneimine is 1%-50% (e.g., 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40% or 45%, etc.), and more preferably 3%-10%.

[0030] Preferably, based on the total mass of component A as 100%, the mass percentage of the etherified product of C8-C18 fatty alcohol is 1%-50% (for example, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40% or 45%, etc.), and more preferably 3%-10%.

[0031] In the present invention, the mass percentage of the polyethyleneimine is preferably 1%-50%, and the mass percentage of the etherified product of C8-C18 fatty alcohol is preferably 1%-50%. If the mass percentage of polyethyleneimine is too large, all the oil phase components will precipitate, which will cause concentration response problems; if the mass percentage of polyethyleneimine is too small, no oil phase will precipitate and the aluminum powder cannot be taken out.

[0032] Preferably, the A component further comprises water.

[0033] Preferably, based on the total mass of component A being 100%, the mass percentage of water is 1%-90%, for example, 10%, 20%, 30%, 40%, 50%, 60%, 70% or 80%.

[0034] Preferably, the combined detergent comprises the following components by weight: 0.1-3 parts of component A and 0.1-10 parts of component B.

[0035] In a second aspect, the present invention provides a hot rolling oil, wherein the hot rolling oil comprises the combined detergent as described in the first aspect.

[0036] Preferably, based on the total mass of the hot rolling oil as 100%, the mass percentage of the combined detergent is 0.2%-13%, for example, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11% or 12%, etc.

[0037] Preferably, the hot rolling oil comprises the following components by mass percentage: 15%-25% (e.g., 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23% or 24%) of lubricating ester, 0-5% (e.g., 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0% or 4.5%) of organic acid, 0-1.5% (e.g., 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, 1.2% or 1.4%) of organic amine, 0-2% (e.g., 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, 1.2%, 1.4%, 1.6% or 1.7%) of emulsifier. .8%, etc.), 0.2%-13% (e.g. 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11% or 12%, etc.) of the combined detergent as described in the first aspect, 0.1%-2% (e.g. 0.2%, 0.4%, 0.6%, 0.8%, 1%, 1.2%, 1.4%, 1.6% or 1.8%, etc.), 0-1.5% (e.g. 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, 1.2% or 1.4%, etc.) of formaldehyde-releasing fungicide, 30-60% (e.g. 33%, 36%, 39%, 42%, 45%, 48%, 51%, 54% or 57%, etc.) of mineral oil.

[0038] Preferably, the lubricating ester includes any one of neopentyl glycol dioleate, glycerol trioleate, pentaerythritol tetraoleate, neopentyl glycol dicocoate, glycerol tricocoate or pentaerythritol tetracocoate, or a combination of at least two thereof.

[0039] Preferably, the organic acid comprises any one of oleic acid, erucic acid, ricinoleic acid, palmitoleic acid or coconut oleic acid, or a combination of at least two thereof.

[0040] Preferably, the organic amine includes any one of triethanolamine, dicyclohexylamine or aminomethyl propanol, or a combination of at least two thereof.

[0041] Preferably, the emulsifier includes any one or a combination of at least two of polyethylene glycol, C8-C18 (e.g., C9, C10, C11, C12, C13, C14, C15, C16 or C17, etc.) fatty alcohol ethers or C8-C18 (e.g., C9, C10, C11, C12, C13, C14, C15, C16 or C17, etc.) alkyl phosphates.

[0042] Preferably, the phenolic antioxidant includes antioxidant 702 and / or antioxidant 703 .

[0043] Preferably, the formaldehyde-releasing fungicide comprises hydroxyethyl hexahydro-s-triazine.

[0044] Preferably, the mineral oil comprises a hydrotreated naphthenic fraction.

[0045] In a third aspect, the present invention provides a use of the hot rolling oil as described in the second aspect in a hot rolling process of pure aluminum or aluminum alloy.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] In the present invention, the combined detergent can improve the compatibility of aluminum powder generated during the rolling process of the rolling emulsion, improve the dispersion performance of the aluminum powder in the rolling emulsion, maintain good wetting and stable dispersion of the aluminum powder in the rolling emulsion, and avoid deposition and scaling; it can maximize the efficiency of the skimming or filtering process, is easy to operate, and can repeatedly perform skimming or filtering operations to achieve a low-loss purification process. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 The state of the hot rolling oil provided in Example 1 on the wall of the cup after pouring out the rolling emulsion containing aluminum powder when the aluminum powder wettability and dispersibility test is performed;

[0049] Figure 2 The residual state of aluminum powder on the cup wall after washing with the rolling emulsion when the hot rolling oil provided in Example 1 was used to test the wettability and dispersibility of aluminum powder;

[0050] Figure 3 The state of the cup wall after pouring out the rolling emulsion containing aluminum powder when the hot rolling oil provided in Comparative Example 5 was tested for the wettability and dispersibility of aluminum powder;

[0051] Figure 4 The residual state of aluminum powder on the cup wall after washing with rolling emulsion when the hot rolling oil provided in Comparative Example 5 was used to test the wettability and dispersibility of aluminum powder;

[0052] Figure 5 The state of the hot rolling oil provided in Example 1 before being left to stand in the aluminum powder separation test;

[0053] Figure 6 The state of the hot rolling oil provided in Example 1 after being left to stand in the aluminum powder separation test;

[0054] Figure 7 The state of the hot rolling oil provided for Comparative Example 2 after being left to stand in the aluminum powder separation test;

[0055] Figure 8 The state of the hot rolling oil provided for Comparative Example 5 before being left to stand in the aluminum powder separation test;

[0056] Fig. 9 The state of the hot rolling oil provided for Comparative Example 5 after being left to stand in the aluminum powder separation test. DETAILED DESCRIPTION

[0057] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0058] The raw materials involved in the specific implementation of the present invention are all conventional commercially available products, and can be selected to meet the following conditions without affecting the effects of the present invention. Some components in the embodiments and comparative examples are as follows.

[0059] Polyethyleneimine a, having the structure shown below, has a number average molecular weight of 8000;

[0060]

[0061] Polyethyleneimine b, having the structure shown below, and a number average molecular weight of 5000;

[0062]

[0063] Polyethyleneimine c, having the structure shown below, and a number average molecular weight of 10,000;

[0064]

[0065] The etherified product a of C8-C18 fatty alcohol has the structure shown in the following formula 2-1;

[0066]

[0067] The etherified product b of C8-C18 fatty alcohol has the structure shown in the following formula 2-2;

[0068]

[0069] The etherified product c of C8-C18 fatty alcohol has the structure shown in the following formula 2-3;

[0070]

[0071] The monosubstituted phosphate a has a structure as shown in Formula 3-1 below;

[0072]

[0073] The monosubstituted phosphate b has a structure as shown in Formula 3-2 below;

[0074]

[0075] The monosubstituted phosphate c has a structure as shown in Formula 3-3 below;

[0076]

[0077] The disubstituted phosphate has a structure as shown in Formula 4-1 below;

[0078]

[0079] Amine phosphate having the structure shown in Formula 5-1 below;

[0080]

[0081] Formaldehyde-releasing fungicide: hydroxyethyl hexahydrotriazine;

[0082] Mineral oil: Hydrotreated cycloalkyl fraction, manufacturer is Kunlun Lubricant, model is N4010.

[0083] Example 1

[0084] This embodiment provides a combined detergent and hot rolling oil, wherein the combined detergent comprises the following components in parts by weight: 1 part of component A and 3 parts of component B;

[0085] The component A comprises the following components by mass percentage: 10% of polyethyleneimine, 10% of etherified product of C8-C18 fatty alcohol and 80% of water;

[0086] The B component is a monosubstituted phosphate a.

[0087] The hot rolling oil includes the following components in percentage by mass: 25% of lubricating ester (neopentyl glycol dioleate), 5% of organic acid (oleic acid), 1.5% of organic amine (triethanolamine), 2% of emulsifier (polyethylene glycol 400, with an average number average molecular weight of 400), 4% of the above-mentioned combined detergent, 0.5% of phenolic antioxidant (antioxidant 702), 0.9% of formaldehyde-releasing bactericide (hydroxyethyl hexahydro-s-triazine), and 61.1% of mineral oil (hydrogenated cycloalkyl fraction).

[0088] Example 2

[0089] This embodiment provides a combined detergent and hot rolling oil, wherein the combined detergent comprises the following components by weight: 0.1 parts of component A and 10 parts of component B;

[0090] The component A comprises the following components by mass percentage: 3% of polyethyleneimine b, 10% of etherified product b of C8-C18 fatty alcohol and 87% of water;

[0091] The B component is a monosubstituted phosphate b.

[0092] The hot rolling oil includes the following components in percentage by mass: 20% lubricating ester (glycerol trioleate), 2% organic acid (erucic acid), 1% organic amine (triethanolamine), 1% emulsifier (polyethylene glycol 400, with an average number average molecular weight of 400), 10% of the above-mentioned combined detergent, 0.5% phenolic antioxidant (antioxidant 703), 0.5% formaldehyde-releasing bactericide (hydroxyethyl hexahydro-s-triazine), and 65% mineral oil (hydrogenated cycloalkyl fraction).

[0093] Example 3

[0094] This embodiment provides a combined detergent and hot rolling oil, wherein the combined detergent comprises the following components in parts by weight: 3 parts of component A and 0.1 parts of component B;

[0095] The component A comprises the following components by mass percentage: 10% of polyethyleneimine c, 5% of etherified product c of C8-C18 fatty alcohol and 85% of water;

[0096] The B component is a monosubstituted phosphate c.

[0097] The hot rolling oil includes the following components in percentage by mass: 15% of lubricating ester (neopentyl glycol dioleate), 4% of organic acid (oleic acid), 1% of organic amine (triethanolamine), 0.5% of emulsifier (polyethylene glycol 400, with an average number average molecular weight of 400), 13% of the above-mentioned combined detergent, 0.5% of phenolic antioxidant (antioxidant 702), 1.5% of formaldehyde-releasing bactericide (hydroxyethyl hexahydro-s-triazine), and 64.5% of mineral oil (hydrogenated cycloalkyl fraction).

[0098] Example 4

[0099] This embodiment provides a combined detergent and hot rolling oil, which is different from Example 1 only in that the mono-substituted phosphate ester a is replaced by a combination of amine phosphate and mono-substituted phosphate ester a of the same mass, and the mass ratio of amine phosphate to mono-substituted phosphate ester a is 1:1. The rest is the same as Example 1.

[0100] Example 5

[0101] This embodiment provides a combined detergent and hot rolling oil, which is different from Embodiment 1 only in that the weight fraction of component A in the combined detergent is adjusted to 5 parts, and the rest is the same as Embodiment 1.

[0102] Example 6

[0103] This embodiment provides a combined detergent and hot rolling oil, which is different from Embodiment 1 only in that the weight fraction of component B in the combined detergent is adjusted to 15 parts, and the rest is the same as Embodiment 1.

[0104] Comparative Example 1

[0105] This comparative example provides a combined detergent and hot rolling oil, which differs from Example 1 only in that polyethyleneimine a is not added to the A component, the mass percentage of the etherified product a of C8-C18 fatty alcohol is adjusted to 20%, and other conditions are the same as those of Example 1.

[0106] Comparative Example 2

[0107] This comparative example provides a combined detergent and hot rolling oil, which differs from Example 1 only in that the etherified product a of C8-C18 fatty alcohol is not added to the A component, the mass percentage of polyethyleneimine a is adjusted to 20%, and other conditions are the same as those in Example 1.

[0108] Comparative Example 3

[0109] This comparative example provides a combined detergent and hot rolling oil, which is different from Example 1 only in that the combined detergent does not include component A, and other conditions are the same as those of Example 1.

[0110] Comparative Example 4

[0111] This comparative example provides a combined detergent and hot rolling oil, which is different from Example 1 only in that the combined detergent does not include component B, and other conditions are the same as those of Example 1.

[0112] Comparative Example 5

[0113] This comparative example provides a hot rolling oil, which is different from Example 1 only in that the hot rolling oil does not include a combined detergent, and other conditions are the same as those of Example 1.

[0114] Comparative Example 6

[0115] This comparative example provides a combined detergent and hot rolling oil, which is different from Example 1 only in that the weight fraction of component A in the combined detergent is adjusted to 8 parts, and the rest is the same as Example 1.

[0116] The hot rolling oil provided in the above embodiments and comparative examples was tested, and the specific test method is as follows:

[0117] (1) Wettability and dispersibility of aluminum powder: Mix hot rolling oil and water in a Braun mixer, where the mass percentage of hot rolling oil is 4%. Shear to form a rolling emulsion. Add 1g of aluminum powder to 300g of rolling emulsion and continue shearing for 5 minutes. After shearing, pour out the rolling emulsion containing aluminum powder and observe the state on the wall of the Braun mixer cup. Figure 1As shown, the aluminum powder on the cup wall can be completely wetted by the rolling emulsion, and there is no dry aluminum powder attached to the cup wall, which is considered to have good wettability. If most of the aluminum powder on the cup wall can be wetted by the emulsion, and a small amount of dry aluminum powder adheres to the cup wall, it is considered to have good wetting. If basically only dry aluminum powder adheres to the cup wall, it is considered to have poor wetting.

[0118] Then rinse with rolling emulsion and observe the residual state of aluminum powder on the wall. Figure 2 As shown, the aluminum powder wetted on the cup wall can be completely dispersed and taken away by the rolling emulsion, which is considered to have good dispersion; if after rinsing, most of the aluminum powder on the cup wall can be dispersed and taken away by the rolling emulsion, which is considered to have good dispersion; if the aluminum powder attached or agglomerated on the cup wall cannot be taken away by the rolling emulsion, it is considered to have poor dispersion.

[0119] If the test results of the wettability and dispersibility of aluminum powder are good or relatively good, the aluminum powder separation test is performed; if the test results of the wettability and / or dispersibility of aluminum powder are poor, there is no need to perform the aluminum powder separation test.

[0120] (2) Aluminum powder separation test: Hot rolling oil and water were mixed in a Braun mixer, wherein the mass percentage of hot rolling oil was 4%, and shearing was performed to form a rolling emulsion. 1 g of aluminum powder was added to 300 g of the rolling emulsion and shearing was continued for 5 min to obtain a rolling emulsion containing aluminum powder. The aluminum powder separation in the rolling emulsion containing aluminum powder was observed after standing for 10 min. If the aluminum powder floated out after standing for 10 min, the aluminum powder was Figure 6 As shown, it is recorded that the aluminum powder floats out and no oil phase precipitates, and the effect is good; if the aluminum powder and the oil phase components all float out after standing, although the aluminum powder all floats out, the oil phase components also float out. Figure 7 As shown, it is recorded that aluminum powder floats out and oil phase precipitates, and the effect is poor; if no aluminum powder floats out after standing still, Fig. 9 As shown, no aluminum powder floats out, indicating a poor effect.

[0121] The test results are shown in Table 1 below.

[0122] Table 1

[0123]

[0124]

[0125] In Table 1, “ / ” means that the test was not conducted.

[0126] Figure 1 When the hot rolling oil provided in Example 1 was used to test the wettability and dispersibility of aluminum powder, the state of the cup wall after pouring out the rolling emulsion containing aluminum powder was that the aluminum powder on the cup wall was completely wetted, and the aluminum powder had good wetting performance. After rinsing with the rolling emulsion, no aluminum powder residue was found on the cup wall (such as Figure 2 ), that is, the wetted aluminum powder can be stably dispersed in the rolling emulsion with good dispersibility.

[0127] Figure 3 When the hot rolling oil provided in Comparative Example 5 was tested for wettability and dispersibility of aluminum powder, the state of the cup wall after pouring out the rolling emulsion containing aluminum powder was that the aluminum powder was seriously agglomerated on the cup wall, the aluminum powder scaled on the cup wall, and the aluminum powder had poor wetting performance. After washing with the rolling emulsion, aluminum powder still remained on the wall (such as Figure 4 ), that is, the aluminum powder scales on the wall and cannot be dispersed in the emulsion, and the dispersion performance is poor.

[0128] Figure 5 The state of the hot rolling oil provided in Example 1 before being left to stand in the aluminum powder separation test, Figure 6 The hot rolling oil provided in Example 1 is in a state after being left to stand in an aluminum powder separation test. The aluminum powder can quickly float on the surface with a certain amount of oil phase, and the aluminum powder can be easily taken out through skimming or filtering processes.

[0129] Figure 7 The hot rolling oil provided for Comparative Example 2 is in a state after being left to stand in the aluminum powder separation test, and the aluminum powder and the oil phase components all float out. Although the aluminum powder all floats out, the oil phase components also float out.

[0130] Figure 8 and Fig. 9 The state of the hot rolling oil provided in Comparative Example 5 before and after standing in the aluminum powder separation test, Figure 8 is the state before standing still, Fig. 9 This is the state after standing still. The rolling emulsion has almost no change before and after standing still, and the aluminum powder is difficult to float. If you want to remove the aluminum powder at this time, you must extend the standing time or skim a lot of oil.

[0131] Depend on Figure 1-6 As can be seen from the contents of Table 1, the combined detergent provided by the present invention can improve the compatibility of aluminum powder generated during the rolling process of the rolling emulsion, improve the dispersion performance of the aluminum powder in the rolling emulsion, maintain good wetting and stable dispersion of the aluminum powder in the rolling emulsion, and avoid deposition and scaling; by matching the A component and the B component in an appropriate proportion, the aluminum powder can quickly float on the surface with a small amount of oil phase, thereby improving the efficiency of the skimming or filtering process, greatly reducing the amount of skimming, and realizing a low-loss purification process.

[0132] Compared with Example 1, if the weight fraction of component B is too high (Example 6), the wetting and dispersion effect of the rolling emulsion on the aluminum powder becomes worse. It can be seen that when the weight fraction of component B is in the range of 0.1-10 parts, the performance of the prepared combined detergent is better.

[0133] Compared with Example 1, if component A does not include polyethyleneimine (Comparative Example 1), the rolling emulsion has poor wetting and dispersing effects on aluminum powder; if component A does not include etherified products of C8-C18 fatty alcohols (Comparative Example 2), the aluminum powder separation effect is poor.

[0134] Compared with Example 1, if the combined detergent does not include component A (Comparative Example 3), the rolling emulsion has poor wetting and dispersing effects on aluminum powder; if the combined detergent does not include component B (Comparative Example 4), the aluminum powder separation effect is poor. It can be seen that in the present invention, through the coordination of component A and component B, the wetting and dispersing ability of the rolling emulsion on aluminum powder is improved, and the aluminum powder separation effect is good after standing, thereby improving the efficiency of the skimming or filtering process, and at the same time improving the efficiency and total amount of aluminum powder taken out.

[0135] Compared with Example 1, if the hot rolling oil does not include the combined detergent (Comparative Example 5), the rolling emulsion has poor wetting and dispersion effects on the aluminum powder, no aluminum powder floats out after standing, and the aluminum powder separation effect is poor.

[0136] Compared with Example 1, if the weight fraction of component A is too high (Comparative Example 6), the effect of separating aluminum powder is poor.

[0137] The applicant declares that the present invention illustrates the process method of the present invention through the above-mentioned embodiments, but the present invention is not limited to the above-mentioned process steps, that is, it does not mean that the present invention must rely on the above-mentioned process steps to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the raw materials selected by the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A combined detergent, characterized in that: The combined detergent comprises the following components by weight: 0.1-5 parts of component A and 0.1-15 parts of component B; The A component includes polyethyleneimine and an etherified product of C8-C18 fatty alcohol; The B component includes fatty alcohol polyether phosphate and / or amine phosphate.

2. The combined detergent according to claim 1, characterized in that: The polyethyleneimine has a structure as shown in Formula 1 below, and a number average molecular weight of 5000-10000; 3. The combined detergent according to claim 1 or 2, characterized in that: The etherified product of the C8-C18 fatty alcohol has a structure as shown in Formula 2 below; In Formula 2, n is an integer of 3-10, and R is a C8-C18 alkyl group.

4. The combined detergent according to any one of claims 1 to 3, characterized in that: The fatty alcohol polyether phosphate includes monosubstituted phosphate and / or disubstituted phosphate; Preferably, the monosubstituted phosphate has a structure as shown in Formula 3 below: In Formula 3, n is an integer of 3-16, and R1 is a C12-C17 alkyl group or a C12-C17 alkenyl group; Preferably, the disubstituted phosphate has a structure as shown in Formula 4 below; In formula 4, n is an integer of 3-16, and R2 and R3 are each independently selected from a C12-C14 alkyl group.

5. The combined detergent according to any one of claims 1 to 4, characterized in that: The amine phosphate has a structure as shown in Formula 5 below; In Formula 5, R4 is a C12-C18 alkyl group, and R5 and R6 are each independently selected from H or a C2-C17 alkyl group.

6. The combined detergent according to any one of claims 1 to 5, characterized in that: Based on the total mass of component A being 100%, the mass percentage of the polyethyleneimine is 1%-50%, more preferably 3%-10%; Preferably, based on the total mass of component A being 100%, the mass percentage of the etherified product of C8-C18 fatty alcohol is 1%-50%, more preferably 3%-10%.

7. The combined detergent according to any one of claims 1 to 6, characterized in that: The A component also includes water; Preferably, based on the total mass of component A being 100%, the mass percentage of water is 1%-90%.

8. A hot rolling oil, characterized in that: The hot rolling oil comprises the combined detergent according to any one of claims 1-7.

9. The hot rolling oil according to claim 8, characterized in that: Based on the total mass of the hot rolling oil being 100%, the mass percentage of the combined detergent is 0.2%-13%; Preferably, the hot rolling oil comprises the following components by mass percentage: 15%-25% lubricating ester, 0-5% organic acid, 0-1.5% organic amine, 0-2% emulsifier, 0.2%-13% of the combined detergent according to any one of claims 1 to 7, 0.1%-2% phenolic antioxidant, 0-1.5% formaldehyde-releasing fungicide, and 30%-65% mineral oil; Preferably, the lubricating ester comprises any one of neopentyl glycol dioleate, glycerol trioleate, pentaerythritol tetraoleate, neopentyl glycol dicocoate, glycerol tricocoate or pentaerythritol tetracocoate, or a combination of at least two thereof; Preferably, the organic acid comprises any one of oleic acid, erucic acid, ricinoleic acid, palmitoleic acid or coconut oleic acid, or a combination of at least two thereof; Preferably, the organic amine includes any one or a combination of at least two of triethanolamine, dicyclohexylamine or aminomethyl propanol; Preferably, the emulsifier comprises any one or a combination of at least two of polyethylene glycol, C8-C18 fatty alcohol ethers or C8-C18 alkyl phosphates; Preferably, the formaldehyde-releasing fungicide comprises hydroxyethyl hexahydro-s-triazine; Preferably, the mineral oil comprises a hydrotreated naphthenic fraction.

10. Use of the hot rolling oil as claimed in claim 8 or 9 in the hot rolling process of pure aluminum or aluminum alloy.

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