An oil film removing agent, its preparation method and application

Abstract

The application discloses an oil film removing agent and a preparation method and application thereof. The oil film removing agent comprises the following components: an organic polyacid salt, an organic monobasic acid, a carboxyl type imidazoline surfactant and an amine oxide surfactant. The oil film removing agent can not only quickly remove the oil film, but also has a simple application method, and can meet the market demand better. The oil film removing agent can be applied to aquaculture water bodies, and can quickly remove the oil film of the aquaculture water bodies and reduce the eutrophication degree of the water bodies. The oil film removing agent can be directly added to the polluted water bodies to remove the oil film, and other complicated devices and processes are not needed, and the oil film removing agent can be directly used in large-scale aquaculture farms, is easy to popularize and apply, and has a good development prospect.

Description

Technical Field

[0001] This invention belongs to the field of cleaning technology, specifically relating to an oil film remover, its preparation method, and its application. Background Technology

[0002] In high-density aquaculture, the large amounts of feed fed to farmed animals produce a significant amount of excrement after ingestion and digestion. This excrement, after entering the water, undergoes decomposition by microorganisms and metabolism by plankton, forming an oil film on the water surface. This oil film, representing the surface layer of eutrophic water, forms a thin, sticky film due to the aging and death of algae in the pond. When a large amount of oil film is present on the water surface, it hinders air-water contact, increases surface tension, affects dissolved oxygen levels, and ultimately impacts the survival of aquatic animals.

[0003] Currently, the main methods for treating oil film in aquaculture are physical and chemical methods. Physical methods generally use oil film removal devices, but these devices require manual removal of the oil film, resulting in poor removal efficiency, and are time-consuming and labor-intensive, making large-scale use difficult. Chemical methods include the use of surfactants and compound formulations. Currently, the main chemical method involves spraying organic acid oil film removers, but most manufacturers produce simple organic acids, which suffer from slow removal speed, poor effectiveness, and the potential for secondary pollution of the water. Existing compound formulations suffer from complex raw materials, cumbersome preparation processes, high costs, and generally limited effectiveness. Therefore, overcoming the shortcomings of these existing technologies is a pressing issue that needs to be addressed in the field of aquaculture water purification. Summary of the Invention

[0004] To overcome the problems existing in the prior art, one objective of this invention is to provide an oil film remover. A second objective is to provide a method for preparing this oil film remover. A third objective is to provide an application of this oil film remover. A fourth objective is to provide a method for eliminating oil film on the surface of aquaculture water.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A first aspect of the present invention provides an oil film remover, the oil film remover comprising the following components: organic polybasic acid salts, organic monobasic acids, carboxyl imidazoline surfactants, and amine oxide surfactants.

[0007] Preferably, the oil film eliminator comprises the following components in parts by weight: 15-30 parts of organic polybasic acid salt, 1-8 parts of organic monobasic acid, 2-6 parts of carboxyl-type imidazoline surfactant, and 4-8 parts of amine oxide surfactant. More preferably, the oil film eliminator comprises the following components in parts by weight: 18-25 parts of organic polybasic acid salt, 1-4 parts of organic monobasic acid, 2-4 parts of carboxyl-type imidazoline surfactant, and 4-8 parts of amine oxide surfactant.

[0008] Preferably, the organic polyacid salt is one or more of sodium citrate, disodium adipic acid, or sodium succinate.

[0009] Preferably, the organic monocarboxylic acid is acetic acid.

[0010] Preferably, the oil film remover is in the form of an aqueous solution.

[0011] Preferably, the oil film remover further includes 60-65 parts by weight of water.

[0012] More preferably, the oil film remover comprises the following components in parts by weight: 15-30 parts of organic polybasic acid salt, 1-8 parts of organic monobasic acid, 2-6 parts of carboxyl imidazoline surfactant, 4-8 parts of amine oxide surfactant, and 60-65 parts of water.

[0013] Preferably, the carboxyl-type imidazoline surfactant is 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline.

[0014] The structural formula (1) of the 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline is as follows:

[0015]

[0016] Preferably, the amine oxide surfactant is one or more of lauramidopropylamine oxide, cocamidopropylamine oxide, or dodecyl dimethylamine oxide.

[0017] The second aspect of the present invention provides a method for preparing the oil film remover described in the first aspect of the present invention, comprising the following steps: mixing and stirring the components to obtain the oil film remover.

[0018] Preferably, the preparation method of the oil film remover includes the following steps: stirring 15-30 parts by weight of organic polybasic acid salt, 1-8 parts by weight of organic monobasic acid, 2-6 parts by weight of carboxyl imidazoline surfactant, and 4-8 parts by weight of amine oxide surfactant in 60-70 parts by weight of water until homogeneous, then adding the additives and continuing to stir to obtain the oil film remover.

[0019] Preferably, the preparation method of the oil film remover includes the following steps: stirring organic polybasic acid salts, organic monobasic acid, carboxyl imidazoline surfactants and amine oxide surfactants in water at a speed of 1000-500 r / min for 5-30 min, then adding the additives, and continuing to stir for 10-20 min to obtain the oil film remover.

[0020] Preferably, the auxiliary agent is potassium chloride, and the dosage is two parts.

[0021] A third aspect of the present invention provides the application of the oil film remover described in the first aspect of the present invention in eliminating oil film on the surface of aquaculture water, wherein the aquaculture water treatment includes eliminating oil film on the surface of the water or reducing eutrophication of the water.

[0022] The fourth aspect of the present invention provides a method for removing oil film on the surface of aquaculture water, wherein the oil film removal agent described in the first aspect of the present invention is used to treat the oil film on the surface of aquaculture water.

[0023] Preferably, the volume ratio of the oil film remover to the aquaculture water is 1:500-2000.

[0024] Preferably, the method for treating the oil film on the surface of aquaculture water includes the following steps: directly adding the above-mentioned oil film remover to the aquaculture water.

[0025] Preferably, the processing time is 1 to 100 minutes. More preferably, the processing time is 1 to 10 minutes.

[0026] The beneficial effects of this invention are:

[0027] This invention provides an oil film removal agent, which mainly consists of organic acids and their salts, and amphoteric surfactants, specifically organic polybasic acid salts, organic monobasic acids, carboxyl imidazoline surfactants, amine oxide surfactants, and water. The combination of 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline and cocamidopropylamine oxide significantly enhances the effect, not only greatly shortening the oil film removal time and increasing the removal rate, but also significantly improving eutrophication of water bodies. This oil film removal agent not only removes oil films quickly, but also has a simple application method, better meeting market demands.

[0028] Specifically, compared with the prior art, the present invention has the following advantages:

[0029] 1) The oil film remover of the present invention is mainly composed of organic acids, carboxyl imidazoline surfactants, and amine oxide surfactants. The components used do not contain harmful substances that cause secondary pollution. The raw materials are easy to obtain and have low cost. The remover can not only remove oil film quickly and stably, but also has a simple application method.

[0030] 2) The preparation method of the oil film remover of the present invention is simple, and it can be obtained by simply stirring the raw materials.

[0031] 3) The oil film removal agent of this invention can be applied to aquaculture water bodies, rapidly eliminating oil film while reducing eutrophication. Within 3 minutes of application, the oil film removal agent achieves a 99.1% removal rate, and a 36.6% reduction in total nitrogen. This reduction in eutrophication is something most current oil film removal agents cannot achieve. The oil film removal agent of this invention only requires direct addition to the polluted water body for oil film removal, eliminating the need for complex equipment and processes. It can be directly used in large-scale aquaculture farms, making it easy to promote and apply, and possessing excellent development prospects. Attached Figure Description

[0032] Figure 1 The changes in dissolved oxygen during the oil film coverage period and the oil film removal period in the water body;

[0033] Figure 2 This represents the pH changes during the oil film coverage period and the oil film removal period in the water body. Detailed Implementation

[0034] The present invention will be further described in detail below through specific embodiments. Unless otherwise specified, the raw materials used in the following embodiments can be obtained from conventional commercial channels or prepared and isolated through simple synthesis; unless otherwise specified, the processes employed are conventional processes in the art.

[0035] Example 1

[0036] This embodiment provides an oil film remover suitable for aquaculture water and its preparation method.

[0037] An oil film remover suitable for aquaculture water bodies comprises the following components in parts by weight: 21 parts sodium citrate; 2 parts acetic acid; 3 parts cocamidopropylamine oxide; 5 parts 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline; and 63 parts deionized water.

[0038] A method for preparing an oil film remover suitable for aquaculture water includes the following steps:

[0039] (1) Weigh out sodium citrate, acetic acid, cocamidopropylamine oxide, 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline and deionized water according to the weight ratio, and set aside;

[0040] (2) Sodium citrate, acetic acid, cocamidopropylamine oxide and 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline were added to deionized water in sequence and stirred at 150 r / min for 10 min. Then the additives were added and the mixture was stirred for another 7 min to obtain the oil film remover.

[0041] Example 2

[0042] This embodiment provides an oil film remover suitable for aquaculture water and its preparation method.

[0043] An oil film remover suitable for aquaculture water bodies comprises the following components in parts by weight: 25 parts sodium citrate; 4 parts acetic acid; 4 parts cocamidopropylamine oxide; 6 parts 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline; and 65 parts deionized water.

[0044] A method for preparing an oil film remover suitable for aquaculture water includes the following steps:

[0045] (1) Weigh out sodium citrate, acetic acid, cocamidopropylamine oxide, 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline and deionized water according to the weight ratio, and set aside;

[0046] (2) Sodium citrate, acetic acid, cocamidopropylamine oxide and 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline were added to deionized water in sequence and stirred at 150 r / min for 10 min. Then the additives were added and the mixture was stirred for another 7 min to obtain the oil film remover.

[0047] Example 3

[0048] This embodiment provides an oil film remover suitable for aquaculture water and its preparation method.

[0049] An oil film remover suitable for aquaculture water bodies comprises the following components in parts by weight: 28 parts sodium citrate; 8 parts acetic acid; 4 parts cocamidopropylamine oxide; 7 parts 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline; and 68 parts deionized water.

[0050] A method for preparing an oil film remover suitable for aquaculture water includes the following steps:

[0051] (1) Weigh out sodium citrate, acetic acid, cocamidopropylamine oxide, 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline and deionized water according to the weight ratio, and set aside;

[0052] (2) Sodium citrate, acetic acid, cocamidopropylamine oxide and 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline were added to deionized water in sequence and stirred at 150 r / min for 10 min. Then the additives were added and the mixture was stirred for another 7 min to obtain the oil film remover.

[0053] Example 4

[0054] This embodiment provides an oil film remover suitable for aquaculture water and its preparation method.

[0055] An oil film remover suitable for aquaculture water bodies comprises the following components in parts by weight: 30 parts sodium citrate; 2 parts acetic acid; 6 parts cocamidopropylamine oxide; 8 parts 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline; and 70 parts deionized water.

[0056] A method for preparing an oil film remover suitable for aquaculture water includes the following steps:

[0057] (1) Weigh out sodium citrate, acetic acid, cocamidopropylamine oxide, 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline and deionized water according to the weight ratio, and set aside;

[0058] (2) Sodium citrate, acetic acid, cocamidopropylamine oxide and 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline were added to deionized water in sequence and stirred at 150 r / min for 10 min. Then the additives were added and the mixture was stirred for another 7 min to obtain the oil film remover.

[0059] Comparative Example 1

[0060] This comparative example provides an oil film remover suitable for aquaculture water and its preparation method. Compared with Example 1, the oil film remover does not contain cocamidopropylamine oxide, and the rest is the same as in Example 1.

[0061] Comparative Example 2

[0062] This comparative example provides an oil film remover suitable for aquaculture water and its preparation method. Compared with Example 1, the oil film remover does not contain 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline, and the rest are the same as in Example 1.

[0063] Comparative Example 3

[0064] This comparative example provides an oil film remover suitable for aquaculture water and its preparation method. Compared with Example 1, the surfactant component of the oil film remover is replaced with 2-lauryl-N-carboxymethyl-N-hydroxyethylimidazoline instead of 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline, and the rest is the same as in Example 1.

[0065] Comparative Example 4

[0066] This comparative example provides an oil film remover suitable for aquaculture water and its preparation method. Compared with Example 1, the surfactant component of the oil film remover is replaced by 2-alkyl-N-carboxymethyl-N-hydroxyethylsulfonylimidazoline instead of 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline, and the rest is the same as in Example 1.

[0067] Experimental characterization

[0068] 1. Test Methods

[0069] The test water sample was taken from a water body containing an oil film on the surface of aquaculture farm in Guangzhou. The basic properties of the test water sample are shown in Table 1.

[0070] Table 1. Basic properties of the test water samples

[0071]

[0072] 80L of experimental water sample was added to several reactors (reactor dimensions: 30cm long × 30cm wide × 100cm high). The water temperature was maintained at 26±2℃ at room temperature. The specific experimental procedure is as follows:

[0073] (1) The first stage of the water body oil film coverage period is 5 days. Dissolved oxygen and pH values ​​of water samples taken at 60 cm below the water surface at the center of the water body are measured daily. 1 L of water sample taken at 60 cm below the water surface at the center of the water body is transferred to a beaker for water quality index analysis. The test items and methods are shown in Table 2:

[0074] Table 2. Analytical items and methods for experimental water quality.

[0075]

[0076] (2) During the second stage of oil film removal, on the 6th day of the experiment, the oil film removal agents of Examples 1-4 and Comparative Examples 1-4 were sprayed onto the surface of the oil film in the reactors of the experimental groups (the volume ratio of oil film removal agent to experimental water sample was 1:1000); the control group received no treatment and its surface remained covered by oil film. The oil film removal time and oil film removal rate were measured. The oil film removal time ended when the oil film could no longer be removed. The oil film removal rate = exposed surface area of ​​the water after oil film removal / oil film area before oil film removal × 100%. The dissolved oxygen and pH values ​​of the water sample at 60 cm below the water surface at the center of the water body were measured daily. 1 L of water sample was transferred from 60 cm below the water surface at the center of the water body to a beaker for water quality index analysis, for 5 consecutive days. The detection items and methods were the same as in the first stage.

[0077] 2. Test Results

[0078] (1) Oil film removal rate and removal time

[0079] The oil film removal time and removal rate are shown in Table 3:

[0080] Table 3 Oil film removal time and removal rate

[0081]

[0082] The oil film removal agents of Examples 1-4 of the present invention can achieve an oil film removal rate of over 90% in water within 6 minutes of application. In Example 1, the oil film removal rate in water reaches 99.1% within 3 minutes of application. This also proves that the combined removal agent of 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline and cocamidopropylamine oxide has a significantly improved effect, greatly shortening the oil film removal time and increasing the oil film removal rate.

[0083] (2) Dissolved oxygen and pH

[0084] Figure 1 The study investigated the changes in dissolved oxygen during the oil film coverage period and the oil film removal period. During the oil film coverage period, the dissolved oxygen in the example group, the comparative group, and the control group all decreased rapidly, from 5.46 mg / L to nearly 0 mg / L. During the oil film removal period, the dissolved oxygen in the example group and the comparative group increased, while the control group did not show a significant change. Among them, the dissolved oxygen in Examples 1-4 showed a significant increase.

[0085] Figure 2 The pH values ​​of the example group, comparative group, and control group were similar and showed no significant changes during the oil film coverage and removal process.

[0086] (3) Changes in total nitrogen and total phosphorus

[0087] Table 4 shows the water quality changes during the oil film coverage period and the oil film removal period on the 5th day of the oil film removal period:

[0088] Table 4. Water quality changes during the oil film coverage and removal periods.

[0089]

[0090]

[0091] Compared to the control group, the oil film removal agents of Examples 1-4 of this invention reduced the total nitrogen in water by more than 28%, with Example 1 showing the best nitrogen reduction effect, reducing total nitrogen by 36.6%. This also demonstrates that the combined removal agent of 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline and cocamidopropylamine oxide significantly improves the effect and greatly improves eutrophication. With the removal of the oil film, the increase in water oxygen content facilitates the utilization of nitrogen by algae and other organisms, thereby achieving a nitrogen reduction and removal result.

[0092] In summary, analysis of the oil film removal rate and removal time, dissolved oxygen and pH changes, and total nitrogen and total phosphorus changes in Examples 1-4 and Comparative Examples 1-4 revealed that the combination of 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazoline and cocamidopropylamine oxide significantly improved the effect. This combination not only greatly shortened the oil film removal time and increased the oil film removal rate but also significantly improved eutrophication of the water body. The 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazoline used in this invention exhibits better effects than 2-lauryl-N-carboxymethyl-N-hydroxyethyl imidazoline and 2-alkyl-N-carboxymethyl-N-hydroxyethyl sulfonyl imidazoline, not only in terms of oil film removal rate and removal time but also in terms of increasing dissolved oxygen and reducing total nitrogen in the water body.

[0093] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. An oil film remover, characterized in that, It includes the following components: organic polybasic acid salts, organic monobasic acids, carboxyl imidazoline surfactants, and amine oxide surfactants; The carboxyl-type imidazoline surfactant is 2-undecyl-N-carboxymethyl-N-hydroxyethylimidazoline; The amine oxide surfactant is one or more of lauramidopropylamine oxide, cocoylpropylamine oxide, or dodecyl dimethylamine oxide.

2. The oil film remover according to claim 1, characterized in that, The oil film remover comprises the following components in parts by weight: 15-30 parts of organic polybasic acid salt, 1-8 parts of organic monobasic acid, 2-6 parts of carboxyl imidazoline surfactant, and 4-8 parts of amine oxide surfactant.

3. The oil film remover according to claim 1 or 2, characterized in that, The organic polyacid salt is one or more of sodium citrate, disodium adipic acid, or sodium succinate; And / or, the organic monocarboxylic acid is acetic acid.

4. The oil film remover according to claim 1 or 2, characterized in that, The oil film remover is in the form of an aqueous solution; And / or, the oil film remover further includes 60-65 parts by weight of water.

5. A method for preparing the oil film remover according to any one of claims 1 to 4, characterized in that, Includes the following steps: The components are mixed and stirred to obtain the oil film remover.

6. The application of the oil film remover according to any one of claims 1 to 4 in aquaculture water treatment, characterized in that, The aquaculture water treatment includes removing the oil film on the water surface or reducing eutrophication.

7. A method for treating aquaculture water, characterized in that, The oil film remover according to any one of claims 1 to 4 is added to the aquaculture water for treatment.

8. The processing method according to claim 7, characterized in that, The volume ratio of the oil film remover to the aquaculture water is 1:500~2000.

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