Deodorizing and urine scale removing foaming agent as well as preparation method and application thereof

Abstract

The invention discloses a deodorizing and urine scale removing foaming agent as well as a preparation method and application thereof. The foaming agent comprises the following components: 10%-20% of fatty alcohol polyoxyethylene ether sodium sulfate, 1%-5% of an auxiliary agent, 1%-4% of organic acid, 2%-6% of metal salt, 0.1%-0.5% of a reducing agent and 68%-77% of water. Physical deodorization is changed into chemical reaction deodorization, odor molecules are directly decomposed, the foam layer is used for inhibiting odor gas from overflowing, the solubility of the odor molecules in water is increased, the reaction time of deodorization components and the odor molecules is prolonged, and the deodorization efficiency is improved; after the odor molecules react with the deodorization components, precipitates or soluble salts are generated and discharged along with flushing water; due to the addition of deodorization and urine scale removal components, the foamability of the foaming agent is not influenced, the reaction is carried out in water, the reaction speed is high, the deodorization speed is high, and the pleasure of a user during use is improved.

Description

Technical Field

[0001] The invention relates to the technical field of daily chemical products, in particular to a deodorizing and urine scale removing foaming agent and a preparation method and application thereof. Background Art

[0002] With the continuous improvement of people's living standards and the continuous development of the social environment, the requirements for toilet environmental hygiene are also getting higher and higher. The foam shields currently used in smart toilets mainly play the role of splash prevention, odor isolation and anti-sticking. These foam shields have the following problems: (1) The odor isolation function of the foam shield is to physically isolate the odor through the foam layer, but cannot decompose and remove the odor molecules, that is, it cannot fundamentally eliminate the odor; (2) The air tightness of the foam layer is limited, and the use scenario of the foam shield is generally defined to stay for about 30 minutes. After a long period of standing, the foam will break, the thickness of the foam layer will decrease, and the odor molecules can pass through the foam layer and spread into the air. It is difficult for current products to achieve long-term deodorization; (3) The current foam shield diluent is alkaline and has no function of removing urine scale or inhibiting the formation of urine scale, which is an important cause of odor. Summary of the invention

[0003] The present invention aims to solve at least one of the above technical problems in the related art to a certain extent. To this end, the present invention provides a deodorizing and descaling foaming agent and a preparation method and application thereof.

[0004] The invention provides a foaming agent, which comprises the following components by weight percentage: 10%-20% of sodium fatty alcohol polyoxyethylene ether sulfate, 1%-5% of an auxiliary agent, 1%-4% of an organic acid, 2%-6% of a metal salt, 0.1%-0.5% of a reducing agent, and 68%-77% of water.

[0005] Sodium alcohol polyoxyethylene ether sulfate (AES): It has both ethoxy (C2H5O-) and sulfonic acid groups, and has the characteristics of both anionic and non-ionic surfactants. It has good hard water resistance and emulsification ability. Its solubility, hard water resistance, foaming and wetting power are better than alkyl sulfates.

[0006] The odor molecules mentioned in the present invention mainly refer to ammonia and hydrogen sulfide. Ammonia: easily soluble in water, generating ammonia water, has the general properties of some bases, can react with acids to neutralize, and can also react with salts to generate precipitates. Hydrogen sulfide: a colorless, highly toxic, acidic gas, which dissolves in water to form a weak acid called hydrosulfuric acid, and its aqueous solution contains hydrosulfate HS - and sulfide ion S 2- , hydrogen sulfide exists in the following equilibrium in solution:

[0007] In some preferred embodiments of the present invention, the content of fatty alcohol polyoxyethylene ether sodium sulfate in the foaming agent is 15%-20%.

[0008] In some preferred embodiments of the present invention, the content of the metal salt in the foaming agent is 3%-5%.

[0009] In some preferred embodiments of the present invention, the content of the reducing agent in the foaming agent is 0.1%-0.3%.

[0010] In some embodiments of the present invention, the organic acid is citric acid and humic acid.

[0011] In some embodiments of the present invention, the metal salt is CuSO4, FeCl2 and MnSO4. Copper sulfate can react with ammonia water to form basic copper sulfate precipitate or tetraammine copper (II) ion, and copper sulfate can react with hydrogen sulfide to form copper sulfide precipitate. Under the action of the reducing agent, part of Cu 2+ Can be reduced to cuprous ions (Cu + ), cuprous ions will also react with ammonia molecules in ammonia water. Manganese sulfate can react with ammonia water to form manganese hydroxide precipitate and ammonium sulfate, and manganese sulfate and hydrogen sulfide can react in ammonia water to form manganese sulfide precipitate (MnSO4+H2S+2NH3→(NH4)2SO4+MnS). In an acidic environment, divalent iron ions can be oxidized to trivalent iron by oxygen, and ammonia water can react with divalent iron and trivalent iron to form precipitates, and hydrogen sulfide can react with trivalent iron (2Fe 3+ +S 2- =2Fe 2+ +S), in addition, divalent iron and trivalent iron may also form various complexes with ammonia. By using various metal ions to react with ammonia, there are many reaction pathways and high reaction probability, thereby improving the deodorization efficiency and deodorization persistence. It should be noted that the above-mentioned multiple reactions are not all carried out at the same time, and one or several reactions may be dominant at the same time. With the extension of residence time and the change of solution pH, the dominant reaction will change. The reaction characteristics of different metal ions are complementary, so that the foaming agent can work effectively in a wider pH range and environmental conditions, ensuring that deodorization can be achieved throughout the entire use cycle, taking into account both rapid and long-term deodorization.

[0012] In some embodiments of the present invention, the reducing agent is ascorbic acid. Ascorbic acid is a water-soluble vitamin, and its aqueous solution is acidic and has strong reducing properties. Adding a small amount of ascorbic acid to the formula can adjust the valence of copper ions and iron ions, form a multi-metal valence system, and improve the deodorization efficiency.

[0013] In some embodiments of the present invention, the auxiliary agent is at least one of a betaine surfactant, a glycoside surfactant or an alkanolamide surfactant. Preferably, the betaine surfactant is cocamidopropyl betaine (CAB) or lauroyl amide propyl betaine (LAB); the glycoside surfactant is lauryl glucoside APG0814; the alkanolamide surfactant is coconut oil fatty acid diethanolamide 6501. The auxiliary agent has the functions of foaming, stabilizing foam, and making the foam delicate and stable.

[0014] The present invention also provides a method for preparing the foaming agent, comprising the following steps:

[0015] S1: Adding sodium fatty alcohol polyoxyethylene ether sulfate into water while stirring, and continuing to stir after the sodium fatty alcohol polyoxyethylene ether sulfate is added to obtain solution A;

[0016] S2: Adding an auxiliary agent, an organic acid, a reducing agent and a metal salt to solution A in sequence, and continuing stirring to obtain the foaming agent.

[0017] In some embodiments of the present invention, in step S1, the stirring speed is 500-1500 rpm.

[0018] In some embodiments of the present invention, in step S1, the stirring time is 20-40 minutes.

[0019] In some embodiments of the present invention, in step S1, the stirring is performed at 20-50°C.

[0020] In some embodiments of the present invention, in step S2, the stirring time is 50-80 minutes.

[0021] The invention also proposes the application of the foaming agent in toilet deodorization and urine scale removal.

[0022] According to a preferred embodiment of the present invention, there are at least the following beneficial effects:

[0023] 1. The present invention can remove the odors of nitrogen, sulfur and other components through the coordinated action of multiple components. Sodium fatty alcohol polyoxyethylene ether sulfate (AES) is used as a foaming agent, which has excellent hard water resistance and foaming ability, can generate a thick foaming layer, and has good foam stability. Organic acid has the functions of deodorization and urine scale removal at the same time, wherein deodorization is achieved by acid-base neutralization reaction between organic acid and ammonia and fulvic acid (the part of humic acid soluble in water or dilute acid is fulvic acid) contains a variety of functional groups that can react with ammonia, and urine scale removal is achieved by organic acid directly reacting with urine scale (the main components of urine scale include calcium urate and calcium oxalate) to dissolve it. In addition to the dissolving effect, acid descaling also involves stripping, air lifting and loosening, which promotes the cleaning process. Since AES has general acid resistance, high acidity will affect its foaming performance. The present invention uses weak acid and strictly controls the amount of organic acid so that the pH of the foaming agent or its dilution is about 5, which can take into account both deodorization and urine scale removal performance and foaming performance. Metal salts have a deodorizing effect, and CuSO4, FeCl2, and MnSO4 are preferred. They can react with NH3 and H2S to remove odor molecules. Multiple effects occur simultaneously to ensure efficient and rapid deodorization. Since the addition of metal salts will cause AES thickening to a certain extent, the amount of metal salts added must be strictly controlled to control the viscosity of the foaming agent, to ensure that the foaming agent can be squeezed out smoothly during the operation of the foam shield, and that the foaming agent will not "dry up" and block the pipeline when not in operation. Metal salts are used with reducing agents to partially reduce Fe 3+ Fe 2+ , Cu 2+ Reduction to Cu + , while Fe 2+ It is easily oxidized to Fe in an acidic environment. 3+ , then a variety of metal valence states (Cu 2+ , Cu + , Fe 2+ , Fe 3+ , Mn 2+ ) system, multiple metal ions react with ammonia, with multiple reaction pathways and high reaction probability, thereby improving the deodorization efficiency and deodorization persistence.

[0024] 2. The present invention changes physical odor isolation into chemical reaction deodorization, directly decomposes odor molecules, uses a foam layer to inhibit the overflow of odorous gases, increases the solubility of odor molecules in water, prolongs the reaction time between the deodorizing components and the odor molecules, and improves the deodorizing efficiency; after the odor molecules react with the deodorizing components, precipitates or soluble salts are generated, which are discharged with the flushing water; the addition of deodorizing and urine scale removing ingredients does not affect the foaming properties of the foaming agent, and the reaction is carried out in water, with a fast reaction speed and a fast deodorizing speed, which enhances the user's sense of pleasure when using it.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0027] A foaming agent of the present invention comprises the following raw material components in weight percentage: 10%-20% of sodium fatty alcohol polyoxyethylene ether sulfate (AES), 1%-5% of auxiliary agent, 1%-4% of organic acid, 2%-6% of metal salt, 0.1%-0.5% of reducing agent, and 68%-77% of water. Preferably, the organic acid is citric acid and humic acid, the metal salt is CuSO4, FeCl2 and MnSO4, the reducing agent is ascorbic acid, and the auxiliary agent is cocamidopropyl betaine (CAB).

[0028] The foaming agent of the present invention is further described in detail below through specific preferred embodiments combined with comparative examples and effect test examples, but the present invention is not limited to the following embodiments.

[0029] Examples 1-3

[0030] According to the formula in Table 1, the foaming agents of Examples 1-3 were prepared respectively, and the preparation methods thereof were as follows:

[0031] First weigh the reagents according to the proportion, add filtered water into the container, turn on the agitator and heater, control the stirring speed to 1000 rpm, control the temperature at 40°C, add the surfactant AES while stirring, after adding AES, continue stirring for 30 minutes, then add the auxiliary agent, organic acid, reducing agent and metal salt in turn, turn off the heater, and continue stirring for 60 minutes to obtain the foaming agent.

[0032] Table 1 Foam formulations of Examples 1-3

[0033]

[0034] Comparative Examples 1-6

[0035] According to the formula in Table 2, the foaming agents of Comparative Examples 1-6 were prepared respectively, and their preparation methods were referred to the examples, wherein K12 (sodium dodecyl sulfate), AOS (sodium α-olefin sulfonate), and AEO-9 (fatty alcohol polyoxyethylene ether) are all commonly used surfactants.

[0036] Table 2 Foaming agent formulations of Comparative Examples 1-6

[0037]

[0038] Test example

[0039] The foaming agent properties of the examples and comparative examples were tested according to the following test methods. The results are shown in Table 3.

[0040] 1. Deodorization rate test experiment:

[0041] Prepare a foaming agent dilution (i.e., 100 mL of an aqueous solution containing 1 wt% foaming agent) according to the actual usage concentration and single usage amount of the toilet, place it in a round-bottom flask, add 0.1 mL of ammonia water or hydrogen sulfide standard solution to the foaming agent dilution (the concentration of the ammonia water standard solution is 10 wt%, and the concentration of the hydrogen sulfide standard solution is 100 mg / L), immediately plug the entrance of the round-bottom flask with a rubber stopper with a catheter, and place the round-bottom flask in a water bath, ensuring that the liquid level of the foaming agent dilution is below the water surface of the water bath, and the water bath heating temperature is 50°C. The other end of the rubber stopper catheter is connected to the gas collecting bottle, and the gas collecting bottle has a second gas outlet, which is connected to a gas sensor for detecting the concentration of ammonia or hydrogen sulfide gas. Record the gas sensor data, and consider the highest reading value to be the concentration value of the odor molecules in the foaming agent dilution, recorded as C x .

[0042] In Comparative Example 5, no deodorizing component is added, and its concentration value is the original concentration C0, then the deodorizing rate of the foaming agent K = 100*(C0-C x ) / C0.

[0043] 2. Descaling performance test experiment:

[0044] Prepare a foaming agent dilution (i.e., 100 mL of an aqueous solution containing 1 wt% foaming agent) according to the actual concentration and single usage of the toilet, place it in a beaker, add 0.5 g of urine scale (calcium oxalate CaC2O4) to the foaming agent dilution, stir it magnetically for 1 hour, filter out the scale remaining in the foaming agent dilution with filter paper, dry it at 80°C, and weigh the scale weight, which is recorded as M x , then the descaling rate of the foaming agent is L=100*(0.5-Mx) / 0.5.

[0045] 3. Foaming test experiment:

[0046] Arrow's self-produced smart toilet uses the device's built-in program for foaming (the toilet is equipped with a peristaltic pump and a water pump to feed the foaming agent and tap water respectively. The foaming time is 15 seconds, the foaming agent feed volume is about 1g, and the tap water feed volume is about 100mL). After foaming, let it stand for 10 seconds and mark the upper surface position of the foam layer H xThen start the flushing program to remove the foam layer. After standing for 10 seconds, mark the water seal layer liquid level position H0, then the foam layer thickness H = H x -H0.

[0047] Table 3 Foaming agent performance test results

[0048]

[0049] Result analysis:

[0050] 1. Comparative Example 1 replaces AES with other surfactants K12 and AOS (K12 and AOS are used in combination) on the basis of Example 1, and the total amount of surfactants is increased to 25%. It has been verified by experiments that K12+AOS, that is, the amount used is larger, but the foaming property is still not as good as AES. The thickness of the foam layer of Comparative Example 1 is significantly reduced, and the foaming property of AOS is only about 2 / 3 of that of AES. This is mainly because AES itself has a certain thickening effect, the viscosity is greater than that of AOS, and the wall of the foam formed is stronger and not easy to break, so that the stability (foam strength) of the formed foam is better than that of AOS. The reduction in the thickness of the foam layer will affect the splash resistance and odor isolation. In the present invention, a thicker foam layer helps to inhibit the overflow of odorous gases, increase the solubility of odor molecules in water, and thus prolong the reaction time between the deodorizing component and the odor molecules. Therefore, the reduction in the thickness of the foam layer will affect the deodorizing effect to a certain extent in practical applications.

[0051] 2. Comparative Example 2 adds surfactant AEO-9 to Example 1, and the thickness of the foam layer is significantly reduced, indicating that the mixture of AEO-9 and AES has defoaming properties.

[0052] 3. Comparative Example 3 increases the amount of citric acid on the basis of Example 1, and the thickness of the foam layer is significantly reduced. This is because AES is an alkaline surfactant and too high acidity will reduce its foaming ability.

[0053] 4. Comparative Example 4 increases the amount of CuSO4 and FeCl2 on the basis of Example 1, and the thickness of the foam layer is significantly reduced. This is because although AES has strong hard water resistance, AES can be thickened by inorganic salts (sodium chloride, potassium chloride, ammonium chloride, etc.). Experiments have shown that metal salts can also thicken, but they are far less than inorganic salts. After the amount of metal salt in Comparative Example 4 is increased, the fluidity of the foaming agent becomes worse, resulting in a decrease in the amount of liquid inlet (liquid inlet is blocked) during the execution of the foam shield, and a decrease in the amount of foaming.

[0054] 5. In Comparative Example 5, no deodorizing and urine scale removing component is added, and the thickness of the foam layer is equivalent to that of Example 1, indicating that the addition of the deodorizing and urine scale removing component in this solution does not affect the foaming performance of AES.

[0055] 6. Comparative Example 6 is based on Example 1 without ascorbic acid, and the removal rate of NH3 is reduced, indicating that adding a reducing agent can remove part of Cu 2+ Reduction to Cu + , Fe 3+ Reduction to Fe 2+ , increase the reaction pathways of odor molecules and improve deodorization efficiency.

[0056] The above is a detailed description of the embodiments of the present invention, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A foaming agent, characterized in that: Calculated by weight percentage, it contains the following components: 10%-20% sodium fatty alcohol polyoxyethylene ether sulfate, 1%-5% additive, 1%-4% organic acid, 2%-6% metal salt, 0.1%-0.5% reducing agent, and 68%-77% water.

2. The foaming agent according to claim 1, characterized in that The organic acids are citric acid and humic acid.

3. The foaming agent according to claim 1, characterized in that The metal salts are CuSO4, FeCl2 and MnSO4.

4. The foaming agent according to claim 1, characterized in that The reducing agent is ascorbic acid.

5. The foaming agent according to claim 1, characterized in that The auxiliary agent is at least one of a betaine surfactant, a glycoside surfactant or an alkanolamide surfactant.

6. The method for preparing the foaming agent according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: Add sodium fatty alcohol polyoxyethylene ether sulfate into water while stirring. After the sodium fatty alcohol polyoxyethylene ether sulfate is added, continue stirring to obtain solution A; S2: Adding an auxiliary agent, an organic acid, a reducing agent and a metal salt to solution A in sequence, and continuing stirring to obtain the foaming agent.

7. The preparation method according to claim 6, characterized in that: In step S1, the stirring speed is 500-1500 rpm.

8. The preparation method according to claim 6, characterized in that: In step S1, the stirring time is 20-40 minutes.

9. The preparation method according to claim 6, characterized in that: In step S2, the stirring time is 50-80 minutes.

10. Use of the foaming agent according to any one of claims 1 to 5 in deodorizing toilet bowls and removing urine scale.

Images