Surface cleaning disinfectant as well as preparation method and application thereof
By using a surface cleaning disinfectant containing lactic acid, benzene lactic acid and dodecyl benzene sulfonic acid in the dry area of food processing, the problem that traditional methods are difficult to effectively control microorganisms in a low-moisture environment is solved, and efficient sterilization and cleaning effects are achieved, which is suitable for use in dry areas.
Patent Information
- Application Number
- CN202510347340.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2025-06-20
AI Technical Summary
The prior art is difficult to effectively control the microorganisms on the environment and the surface of equipment objects in the food processing dry area in low-water activity food production process, and traditional cleaning methods require a large amount of water, and commonly used disinfectants have irritating odors and corrosive properties.
It provides a surface cleaning disinfectant, including 0.02~0.1% organic acid, 0.4~1% surfactant, the remaining amount is water, the main components are lactic acid and water-soluble organic acids containing benzene ring structure, combined with dodecyl benzene sulfonic acid and nonionic surfactant to form an acidic aqueous solution, which is suitable for cleaning and disinfection of dry areas of food processing.
The disinfectant enhances the permeability to bacterial cell membranes under a low pH environment and improves the bactericidal effect. It is not irritating, has low flash point and is not corrosive. It is suitable for microbial control in dry area food processing enterprises, achieving the dual effects of cleaning and disinfection.
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Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of disinfectants, and particularly relates to a surface cleaning disinfectant, a preparation method thereof, and an application thereof. Background Art
[0002] The dry area of food processing refers to those areas that do not require a large amount of water for cleaning or treatment during the production process. These areas are mainly involved in the production of low-moisture (water activity, Aw) foods. Low-moisture foods refer to foods or food ingredients with an Aw lower than 0.7, mainly including milk powder, peanut butter, nuts, seasonings, fruit and vegetable powders, and low-Aw products obtained by adding salt or sugar, etc. Most bacteria, yeasts, and molds cannot grow and reproduce when the Aw is lower than 0.9, 0.87, and 0.8 respectively. However, there are still a few pathogenic bacteria and spoilage bacteria that can survive for several months to several years in an environment with extremely low Aw. When the conditions are suitable, these microorganisms will grow and reproduce rapidly, posing a hidden danger to food safety. For example, the minimum Aw for the growth of Staphylococcus aureus is 0.83 - 0.85, but this bacterium can survive in cake mixtures (Aw = 0.32), skim milk powder (Aw = 0.22), onion soup mixtures (Aw = 0.14), and gelatin desserts (Aw = 0.42). Therefore, in recent years, the microbial safety problem of low-Aw foods has attracted wide attention from all walks of life. Therefore, it is crucial to control the microorganisms on the environment and the surfaces of equipment and objects during the production and processing of low-Aw foods.
[0003] The traditional cleaning methods in the dry area of food processing mainly rely on the cleaning-disinfection procedure, including removing dirt with an alkaline cleaning agent, water rinsing, secondary cleaning with an acidic cleaning agent, rinsing with water again, and finally disinfecting with a disinfectant. Commonly used disinfectants such as peracetic acid and chlorine dioxide are effective, but they have pungent odors and corrosiveness, require strict personal protection measures, and as hazardous chemicals, they also bring an additional burden to enterprises in terms of storage. More importantly, this cleaning-disinfection method requires a large amount of water and is not suitable for the microbial control requirements of dry area food processing enterprises.
[0004] Therefore, there is an urgent need for a surface cleaning disinfectant, a preparation method thereof, and an application thereof to solve the deficiencies of the prior art. Summary of the Invention
[0005] In view of the above problems, the purpose of the present invention is to provide a surface cleaning disinfectant, a preparation method thereof, and an application thereof. The surface cleaning disinfectant of the present invention can achieve effective cleaning while disinfecting and sterilizing, and is suitable for cleaning and disinfecting the dry area of food processing.
[0006] To achieve the above object, a first aspect of the present invention provides a surface cleaning disinfectant, which, by mass fraction, comprises 0.02 - 0.1% organic acid, 0.4 - 1% surfactant, and the balance is water; the organic acid comprises lactic acid and a water-soluble organic acid containing a benzene ring structure, and the surfactant comprises dodecylbenzenesulfonic acid and a non-ionic surfactant.
[0007] Compared with the prior art, the surface cleaning disinfectant of the present invention has the following beneficial effects: 1. The pKa value of the aqueous solution of dodecylbenzenesulfonic acid is relatively low, which can keep the surface cleaning disinfectant at a low pH value; meanwhile, lactic acid and the water-soluble organic acid containing a benzene ring structure are the main bactericidal components. In a low pH environment, these organic acids exist in molecular form, enhancing the permeability of the bacterial cell membrane, thereby improving the bactericidal effect; in particular, the organic acid containing a benzene ring structure has stronger lipophilicity, further increasing the bactericidal ability of the system. At the same time, the undissociated dodecylbenzenesulfonic acid also has a bactericidal effect, so the organic acid and dodecylbenzenesulfonic acid cooperate with each other to achieve a synergistic bactericidal effect.
[0008] 2. Dodecylbenzenesulfonic acid is an anionic surfactant and has excellent detergency for dirt. The combination of dodecylbenzenesulfonic acid and a non-ionic surfactant with emulsifying and detergency effects enhances its emulsifying and detergency effects on organic dirt, achieving effective cleaning; at the same time, the combination of dodecylbenzenesulfonic acid and the non-ionic surfactant can also further promote the penetration of the organic acid into the cell membrane of contaminated microorganisms by reducing the surface tension, thereby enhancing the bactericidal effect.
[0009] In summary, the surface cleaning disinfectant of the present invention is an acidic aqueous solution, which is non-irritating, has a low flash point, and is non-corrosive, and can achieve the purpose of effective cleaning while disinfecting and sterilizing.
[0010] Further, the mass ratio of dodecylbenzenesulfonic acid to the organic acid in the present invention is 8 - 10:1.
[0011] Further, the water-soluble organic acid containing a benzene ring structure in the present invention is selected from at least one of phenyl lactic acid, salicylic acid, chlorogenic acid, and rosmarinic acid.
[0012] Further, the non-ionic surfactant in the present invention is a fatty alcohol polyoxyethylene ether with an HLB value of 10 - 16.
[0013] Further, the non-ionic surfactant in the present invention is selected from at least one of TERGITOL CA-90, TERGITOL LA-90, TERGITOL 15-S-120, TERGITOL 15-S-15, Berol 266, and Ethylan 1005.
[0014] Further, the pH value of the surface cleaning disinfectant of the present invention is 2.0 - 2.5.
[0015] Correspondingly, the second aspect of the present invention also provides a preparation method of a surface cleaning disinfectant, and the steps include: S1. Dissolve the formulated amount of organic acid in water, and stir to dissolve it evenly to obtain an aqueous solution of organic acid; S2. Add the formulated amount of surfactant to the aqueous solution of organic acid, stir to dissolve it evenly, and make up the balance of water.
[0016] Correspondingly, the present invention also provides the application of the above-mentioned surface cleaning disinfectant in the dry area of food processing. Specific Embodiments
[0017] The surface cleaning disinfectant of the present invention has the function of integrating cleaning and disinfection. Spray the surface cleaning disinfectant on the surface of the object to be cleaned, let it stand for a certain period of time, such as 1 - 3 minutes, and then wipe it dry with a rag, which can ensure that while removing microorganisms, it can also effectively remove dirt and residues; in addition. The surface cleaning disinfectant of the present invention is an acidic aqueous solution, non - irritating, low flash point, and non - corrosive. Therefore, the surface cleaning disinfectant of the present invention is particularly suitable for the cleaning and disinfection of the dry area of food processing.
[0018] The surface cleaning disinfectant of the present invention, by mass fraction, includes 0.02 - 0.1% organic acid, 0.4 - 1% surfactant, and the balance is water; the organic acid includes lactic acid and a water - soluble organic acid containing a benzene ring structure, and the surfactant includes dodecylbenzenesulfonic acid and a non - ionic surfactant.
[0019] Among them, the content of the organic acid can be, but is not limited to, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%. Specifically, the mass ratio of lactic acid to the water - soluble organic acid containing a benzene ring structure is 2.8 - 3.2:1.8 - 2.2; preferably, the mass ratio of lactic acid to the water - soluble organic acid containing a benzene ring structure is 3:2. Lactic acid and the water - soluble organic acid containing a benzene ring structure are the main bactericidal components. In a low - pH environment, the organic acid is in a non - dissociated state, enters the bacterial cell by free diffusion, and then dissociates into carboxyl ions and H + ions. The carboxyl ions have the functions of inhibiting DNA replication, inhibiting protein synthesis, and destroying the bacterial cell membrane, thereby inhibiting the production of the next generation of bacteria; and the dissociated H + then reduces the pH value inside the bacterial cell. Bacteria need to consume energy to excrete acid, thus achieving the bactericidal effect; the organic acid containing a benzene ring structure has better liposolubility, is more easily permeable through the cell wall, and has a better bactericidal effect.
[0020] Among them, the water-soluble organic acid containing a benzene ring structure is selected from at least one of phenyl lactic acid, salicylic acid, chlorogenic acid, and rosmarinic acid.
[0021] Among them, the content of the surfactant can be, but is not limited to, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%; the surfactant includes dodecylbenzenesulfonic acid, which is an anionic surfactant, and its main use is to synthesize the commonly used anionic surfactant sodium dodecylbenzenesulfonate; the inventors of the present application found during the research process that the pH value of the aqueous solution of dodecylbenzenesulfonic acid is low, and its pKa value is 0.7, which can effectively reduce the ionization degree of other organic weak acids; at the same time, the un-ionized dodecylbenzenesulfonic acid also has a certain bactericidal effect, playing a role in synergistic bactericidal action.
[0022] Among them, the mass ratio of dodecylbenzenesulfonic acid to the organic acid is 8-10:1. For example, the mass ratio of dodecylbenzenesulfonic acid to the organic acid can be, but is not limited to, 8:1, 9:1, 10:1.
[0023] Among them, the non-ionic surfactant is a fatty alcohol polyoxyethylene ether with an HLB value of 10-16.
[0024] Among them, the non-ionic surfactant is selected from at least one of TERGITOL CA-90, TERGITOL LA-90, TERGITOL 15-S-120, TERGITOL 15-S-15, Berol 266, and Ethylan 1005. Preferably, the non-ionic surfactant is selected from TERGITOL CA-90 or Berol 266.
[0025] Among them, the pH value of the surface cleaning disinfectant is 2.0-2.5.
[0026] To better illustrate the purpose, technical solution, and beneficial effects of the present invention, the present invention will be further described below in conjunction with specific embodiments. It should be noted that the methods described in the following embodiments are further explanatory descriptions of the present invention and should not be regarded as limitations on the present invention.
[0027] Example 1 This example provides a surface cleaning disinfectant, which includes 0.03% lactic acid, 0.02% phenyl lactic acid, 0.4% dodecylbenzenesulfonic acid, 0.4% TERGITOL CA-90, and the balance is water in terms of mass fraction.
[0028] The preparation method of the surface cleaning disinfectant in this example includes the following steps: S1. Dissolve the formulated amounts of lactic acid and phenyl lactic acid in water, and stir to dissolve them evenly to obtain an aqueous solution of organic acid; S2. Add the formulated amount of dodecylbenzenesulfonic acid and TERGITOL CA-90 to the aqueous organic acid solution, stir to dissolve evenly, and make up the balance with water.
[0029] Example 2 This example provides a surface cleaning disinfectant, which, by mass fraction, includes 0.03% lactic acid, 0.02% chlorogenic acid, 0.5% dodecylbenzenesulfonic acid, 0.4% Berol 266, and the balance is water.
[0030] The preparation method of the surface cleaning disinfectant in this example includes the following steps: S1. Dissolve the formulated amounts of lactic acid and chlorogenic acid in water, and stir to dissolve evenly to obtain an aqueous organic acid solution; S2. Add the formulated amounts of dodecylbenzenesulfonic acid and Berol 266 to the aqueous organic acid solution, stir to dissolve evenly, and make up the balance with water.
[0031] Example 3 This example provides a surface cleaning disinfectant, which, by mass fraction, includes 0.045% lactic acid, 0.03% phenyl lactic acid, 0.71% dodecylbenzenesulfonic acid, 0.4% TERGITOL CA-90, and the balance is water.
[0032] The preparation method of the surface cleaning disinfectant in this example includes the following steps: S1. Dissolve the formulated amounts of lactic acid and phenyl lactic acid in water, and stir to dissolve evenly to obtain an aqueous organic acid solution; S2. Add the formulated amounts of dodecylbenzenesulfonic acid and TERGITOL CA-90 to the aqueous organic acid solution, stir to dissolve evenly, and make up the balance with water.
[0033] Comparative Example 1 This comparative example provides a surface cleaning disinfectant, which, by mass fraction, includes 0.03% lactic acid, 0.4% dodecylbenzenesulfonic acid, 0.4% TERGITOL CA-90, and the balance is water.
[0034] The preparation method of the surface cleaning disinfectant in this comparative example includes the following steps: S1. Dissolve the formulated amount of lactic acid in water, and stir to dissolve evenly to obtain an aqueous organic acid solution; S2. Add the formulated amounts of dodecylbenzenesulfonic acid and TERGITOL CA-90 to the aqueous organic acid solution, stir to dissolve evenly, and make up the balance with water.
[0035] Comparative Example 2 This comparative example provides a surface cleaning disinfectant, which, by mass fraction, includes 0.02% phenyl lactic acid, 0.4% dodecylbenzenesulfonic acid, 0.4% TERGITOL CA-90, and the balance is water.
[0036] The preparation method of the surface cleaning disinfectant in this comparative example includes the following steps: S1. Dissolve the formulated amount of phenyl lactic acid in water, and stir to dissolve it evenly to obtain an organic acid aqueous solution; S2. Add the formulated amounts of dodecylbenzenesulfonic acid and TERGITOL CA-90 to the organic acid aqueous solution, stir to dissolve evenly, and make up the balance of water.
[0037] Comparative Example 3 This comparative example provides a surface cleaning disinfectant, which, by mass fraction, includes 0.03% lactic acid, 0.02% phenyl lactic acid, 0.4% phosphoric acid, 0.4% TERGITOL CA-90, and the balance is water.
[0038] The preparation method of the surface cleaning disinfectant in this comparative example includes the following steps: S1. Dissolve the formulated amounts of lactic acid and phenyl lactic acid in water, and stir to dissolve them evenly to obtain an organic acid aqueous solution; S2. Add the formulated amounts of phosphoric acid and TERGITOL CA-90 to the organic acid aqueous solution, stir to dissolve evenly, and make up the balance of water.
[0039] The pH values of the surface cleaning disinfectants of Examples 1 to 3 and Comparative Examples 1 to 3 were measured using a pH meter. The results are shown in Table 1. Then, the surface cleaning disinfectants of Examples 1 to 3 and Comparative Examples 1 to 3 were subjected to a laboratory bactericidal experiment according to the following method. Specifically, the disinfection was carried out on Staphylococcus aureus for 1 minute according to the method in the "Disinfection Technical Specification" (2002 edition). During the experiment, 3% bovine serum albumin was added as an organic interfering substance. The results are shown in Table 1. And the surface cleaning disinfectants of Examples 1 to 3 were respectively used to disinfect Staphylococcus aureus, Escherichia coli, and Candida albicans for 1 minute according to the method in the "Disinfection Technical Specification" (2002 edition). During the experiment, 3% bovine serum albumin was added as an organic interfering substance. The results are shown in Table 2.
[0040] Table 1
[0041] Note: The positive control value of Staphylococcus aureus is 7.24.
[0042] Table 2
[0043] Note: The positive control value of Staphylococcus aureus is 7.54, the positive control value of Escherichia coli is 7.23, and Candida albicans The positive control value for bacteria is 6.54.
[0044] As can be seen from Table 1, when the surface cleaning disinfectants of Examples 1 to 3 act on Staphylococcus aureus for 1 minute, the logarithmic reduction values are all greater than 5, while when the surface cleaning disinfectants of Comparative Examples 1 to 3 act on Staphylococcus aureus for 1 minute, the logarithmic reduction values are all less than 4. This indicates that the combination of lactic acid, a water-soluble organic acid containing a benzene ring structure, and dodecylbenzenesulfonic acid in the present invention can achieve a synergistic bactericidal effect.
[0045] As can be seen from Table 2, in the presence of organic interfering substances, when the surface cleaning disinfectants of Examples 1 to 3 act on Staphylococcus aureus and Escherichia coli for 1 minute, the logarithmic reduction values are all greater than 5, and when they act on Candida albicans for 1 minute, the logarithmic reduction value is greater than 4, and the disinfection is qualified. Therefore, the surface cleaning disinfectant of the present invention can be used for disinfecting non-clean surface objects.
[0046] The detergency experiment was carried out with reference to the standard "GB9985-2022 Dishwashing Detergent for Handwashing". After preparing the dirt, the surface cleaning disinfectants of Examples 1 to 3 were used for cleaning, and at the same time, a standard dishwashing detergent was used as a control group for the same cleaning. The preparation of the standard dishwashing detergent includes: mixing 14 parts of sodium alkylbenzenesulfonate, 1 part of ethoxylated alkyl sulfate, 5 parts of anhydrous ethanol, 5 parts of urea, and 75 parts of water, and adjusting the pH to 7-8 with hydrochloric acid or sodium hydroxide. The test results are shown in Table 3.
[0047] Table 3
[0048] As can be seen from the results in Table 3, the detergency rates of the surface cleaning disinfectants of Examples 1 to 3 are greater than those of the standard dishwashing detergent, meeting the requirements of the standard "Dishwashing Detergent for Handwashing" (GB / T 9985-2022).
[0049] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, it is not limited only to those listed in the examples. Those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.
Claims
1. A surface cleaning disinfectant, characterized in that: The composition comprises, by mass fraction, 0.02-0.1% of an organic acid, 0.4-1% of a surfactant, and the balance being water; the organic acid comprises lactic acid and a water-soluble organic acid containing a benzene ring structure, and the surfactant comprises dodecylbenzenesulfonic acid and a nonionic surfactant.
2. The surface cleaning disinfectant according to claim 1, characterized in that The mass ratio of the dodecylbenzenesulfonic acid to the organic acid is 8-10:
1.
3. The surface cleaning disinfectant according to claim 1, characterized in that The water-soluble organic acid containing a benzene ring structure is selected from at least one of phenyllactic acid, salicylic acid, chlorogenic acid and rosmarinic acid.
4. The surface cleaning disinfectant according to claim 1, characterized in that The nonionic surfactant is a fatty alcohol polyoxyethylene ether with an HLB value of 10-16.
5. The surface cleaning disinfectant according to claim 1, characterized in that The nonionic surfactant is at least one selected from TERGITOL CA-90, TERGITOL LA-90, TERGITOL 15-S-120, TERGITOL 15-S-15, Berol 266, and Ethylan 1005.
6. The surface cleaning disinfectant according to claim 1, characterized in that: Its pH value is 2.0~2.
5.
7. The method for preparing a surface cleaning and disinfecting agent according to any one of claims 1 to 6, characterized in that the steps include: S1, dissolving the formulated amount of organic acid in water, stirring to make it dissolve evenly, to obtain an organic acid aqueous solution; S2. Add the formulated amount of surfactant into the organic acid aqueous solution, stir to dissolve evenly, and make up the remaining amount of water.
8. Use of the surface cleaning and disinfecting agent according to any one of claims 1 to 6 or the surface cleaning and disinfecting agent prepared by the preparation method of the surface cleaning and disinfecting agent according to claim 7 in food processing dry areas.