Ternary surfactant low-temperature detergent and preparation process thereof

Abstract

The invention relates to the technical field of low-temperature detergents, in particular to a ternary surfactant low-temperature detergent. Comprising the following components: 12% of sodium dodecyl benzene sulfonate, 8% of fatty alcohol-polyoxyethylene ether sodium sulfate, 3% of fatty alcohol-polyoxyethylene ether, 5%-15% of sodium percarbonate, 0.1%-1% of neutral protease, 1%-5% of polyethylene glycol-400, 0.5%-2% of sodium chloride, 0.08% of a fluorescent whitening agent VBL and 60%-75% of water. Through a ternary compound system composed of sodium dodecyl benzene sulfonate, fatty alcohol-polyoxyethylene ether sodium sulfate and fatty alcohol-polyoxyethylene ether and proportion optimization, the total active matter content is larger than or equal to 18%, the edible oil stain removal rate at 40 DEG C is larger than or equal to 90%, the problem that a traditional formula is poor in low-temperature decontamination capacity is solved, the efficient washing requirement in the low-temperature environment is met, and the cleaning effect is good. Polyethylene glycol-400 is used as a rheology modifier instead of silicone oil, so that the compatibility with a surfactant system is better, the problem of system instability caused by the silicone oil is avoided, and the stability of the detergent in the storage and use processes is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of low-temperature detergents, and particularly to a ternary surfactant low-temperature detergent and its preparation process. Background Art

[0002] In the field of detergents, the composition form of traditional formulations is relatively single. For a long time, most detergents on the market have used a single surfactant, among which sodium dodecylbenzenesulfonate is relatively commonly used. Although single sodium dodecylbenzenesulfonate has certain detergency, its performance limitations are obvious. With the increasing requirements for detergent performance, binary compound systems have gradually emerged. A common combination is sodium dodecylbenzenesulfonate and sodium lauryl ether sulfate.

[0003] Traditional detergent formulations mostly use a single surfactant or a binary compound. In a low-temperature environment, the cleaning effect on stains such as oil stains is not good, it is difficult to meet the demand for high-efficiency detergency, and the damage to fabric fibers is relatively large. Most commercially available products use a single enzyme preparation or oxidant, lacking the synergistic effect of oxidative stain removal and enzyme activity, unable to effectively avoid the mutual interference between the oxidant and the enzyme, and it is difficult to achieve the efficient removal of various stains. Using silicone oil as a rheology modifier has poor compatibility with the surfactant system, easily causes the system to be unstable, and has poor fluidity in a low-temperature environment. There will be an obvious thickening phenomenon at -5°C.

[0004] Therefore, in view of the problems of the above-mentioned low-temperature detergents, such as poor fluidity in a low-temperature environment, weak detergency, large damage to fabric fibers, and low comprehensive detergency efficiency, a ternary surfactant low-temperature detergent can be designed. Summary of the Invention

[0005] In order to overcome the problems of traditional low-temperature detergents, such as poor fluidity in a low-temperature environment, weak detergency, large damage to fabric fibers, and low comprehensive detergency efficiency.

[0006] The technical solution of the present invention is: a ternary surfactant low-temperature detergent, which includes the following components in mass percentage: 12% of sodium dodecylbenzenesulfonate, 8% of sodium lauryl ether sulfate, 3% of fatty alcohol polyoxyethylene ether, 5% - 15% of sodium percarbonate, 0.1% - 1% of neutral protease, 1% - 5% of polyethylene glycol - 400, 0.5% - 2% of sodium chloride, 0.08% of fluorescent brightener VBL, and 60% - 75% of water.

[0007] Preferably, the purity of sodium dodecylbenzenesulfonate ≥ 98%, and the carbon chain length of the straight-chain alkyl group in its molecule is mainly C10 - C14.

[0008] Preferably, in sodium lauryl ether sulfate, the degree of ethoxylation is 2 - 3.

[0009] Preferably, in the fatty alcohol polyoxyethylene ether, the carbon chain length of the fatty alcohol is C12-C14, and the ethoxylation degree is 9-10.

[0010] The preparation process of the ternary surfactant low-temperature detergent includes the ternary surfactant low-temperature detergent as described above, and the steps are as follows:

[0011] S1: Pre-dissolution of sodium percarbonate

[0012] Weigh sodium percarbonate according to the formula ratio, add it to an appropriate amount of water, and dissolve it. The amount of water used is 3-5 times the mass of sodium percarbonate. Start the dissolution tank of the stirring device, with a stirring speed of 100-150 r / min, a dissolution temperature controlled at 40-50 °C, and a dissolution time of 15-25 minutes to ensure that sodium percarbonate is completely dissolved;

[0013] S2: Mixing of surfactants

[0014] Add the formula amount of sodium dodecylbenzenesulfonate, sodium lauryl polyoxyethylene sulfate, and fatty alcohol polyoxyethylene ether to the reaction kettle with heating and stirring functions in sequence, then add 30% - 40% of the total water volume, start stirring, with a stirring speed of 150-200 r / min, a mixing temperature controlled at 30-40 °C, and a stirring time of 20-30 minutes to make the surfactants fully dissolved and mixed evenly;

[0015] S3: Add the pre-dissolved sodium percarbonate solution

[0016] Slowly add the pre-dissolved sodium percarbonate solution in step one to the reaction kettle in step two, and continue stirring, with the stirring speed maintained at 150-200 r / min;

[0017] S4: Add polyethylene glycol-400

[0018] Weigh polyethylene glycol-400 according to the formula amount, add it to the above reaction kettle, continuously stir, with a stirring speed of 150-200 r / min and a stirring time of 10-15 minutes;

[0019] S5: Add sodium chloride in portions

[0020] Add the formula amount of sodium chloride to the above reaction kettle in 3-5 portions, with an interval of 10-15 minutes between each addition, and stir simultaneously, with a stirring speed of 150-200 r / min. By controlling the addition amount and number of times of sodium chloride, the viscosity of the detergent is controlled at 3000 ± 500 cps;

[0021] S6: Add neutral protease

[0022] When the temperature of the solution in the reactor drops below 35°C, weigh neutral protease according to the formula amount, slowly add it to the above-mentioned reactor, continue to stir, with the stirring speed at 100 - 150 r / min and the stirring time at 15 - 20 minutes, to ensure that the protease is evenly dispersed in the system;

[0023] S7: Add fluorescent brightener VBL and make up water

[0024] Weigh fluorescent brightener VBL according to the formula amount and add it to the above-mentioned reactor, then add the remaining water to the total formula amount, stir evenly, with the stirring speed at 100 - 150 r / min and the stirring time at 15 - 20 minutes, to make the components of the detergent fully mixed and uniform;

[0025] S8: Detection and packaging

[0026] Conduct quality inspection on the prepared detergent, including indicators such as appearance, odor, viscosity, pH value, and detergency. Control the pH value at 8.5 - 9.0. After passing the inspection, carry out filling and packaging.

[0027] Preferably, when pre-dissolving sodium percarbonate in S1, add an appropriate amount of stabilizer to the water. The addition amount of the stabilizer is 0.1% - 0.5% of the mass of sodium percarbonate. The stabilizer is selected from sodium carbonate or sodium bicarbonate to prevent premature decomposition of sodium percarbonate during pre-dissolution and ensure its stable release of active oxygen when mixed with the surfactant complex system subsequently.

[0028] Preferably, when mixing surfactants in S2, first mix sodium dodecylbenzenesulfonate and sodium lauryl ether sulfate evenly at 30 - 40°C, and then add fatty alcohol polyoxyethylene ether to make the three surfactants interact better with each other.

[0029] Preferably, control the addition time of the pre-dissolved sodium percarbonate solution in S3 at 10 - 15 minutes, and continue to stir for 15 - 20 minutes after the addition to ensure full mixing of the sodium percarbonate solution and the surfactant.

[0030] Preferably, when adding neutral protease in S6, first dissolve the neutral protease in an appropriate amount of water to form a protease solution, and then slowly add the protease solution to the reactor to make the neutral protease more evenly dispersed in the detergent system and avoid enzyme inactivation caused by too high local concentration.

[0031] Preferably, when adding neutral protease in S6, set a temperature sensor in the reactor to monitor the solution temperature in real time. When the temperature exceeds 35°C, immediately turn on the cooling circulating water system to quickly reduce the temperature below 35°C to ensure protease activity. The enzyme activity of the neutral protease is between 10000 - 20000 U / g.

[0032] Advantages of the present invention: Through the ternary compounding system composed of sodium dodecylbenzenesulfonate, sodium lauryl polyoxyethylene ether sulfate, and fatty alcohol polyoxyethylene ether and the optimization of the ratio, the total active matter content is ≥18%, and the removal rate of cooking oil stains is ≥90% at 40°C, solving the problem of weak low-temperature detergency of traditional formulations and meeting the high-efficiency washing needs of consumers in low-temperature environments; Sodium percarbonate and neutral protease are added in stages, and in an alkaline environment with a pH of 8.5 - 9.0, a dual decontamination mechanism of oxidative stain removal and enzymatic hydrolysis is achieved, which can simultaneously decompose pigment stains and protein stains, and the blood stain removal rate reaches 85%, greatly improving the comprehensive stain removal ability for various stains; The addition of fatty alcohol polyoxyethylene ether significantly reduces the damage of the detergent to fabric fibers. Compared with traditional single or binary compounded surfactant systems, it can better care for fabrics and extend the service life of fabrics; Using polyethylene glycol-400 to replace silicone oil as a rheology modifier has better compatibility with the surfactant system, avoiding the system instability problem caused by silicone oil, ensuring the stability of the detergent during storage and use, only slightly thickening at -5°C, significantly improving the low-temperature fluidity, facilitating consumers to take and use in low-temperature environments. Using polyethylene glycol-400 to replace silicone oil and combining with the addition of sodium chloride in portions to achieve viscosity control reduces the cost by 50%. While ensuring product performance, it effectively reduces production costs and improves the market competitiveness of products. Detailed implementation manners

[0033] The present invention will be further described below in conjunction with embodiments.

[0034] Example 1

[0035] The present invention provides an example: a ternary surfactant low-temperature detergent, calculated by mass percentage, includes the following components: 12% of sodium dodecylbenzenesulfonate, 8% of sodium lauryl polyoxyethylene ether sulfate, 3% of fatty alcohol polyoxyethylene ether, 5% of sodium percarbonate, 0.1% of neutral protease, 1% of polyethylene glycol-400, 0.5% of sodium chloride, 0.08% of fluorescent brightener VBL, and 60% of water. The purity of sodium dodecylbenzenesulfonate is ≥98%, and the carbon chain length of the straight-chain alkyl group in its molecule is mainly C10 - C14. In sodium lauryl polyoxyethylene ether sulfate, the degree of ethoxylation is 2 - 3. In fatty alcohol polyoxyethylene ether, the carbon chain length of the fatty alcohol is C12 - C14, and the degree of ethoxylation is 9 - 10.

[0036] The preparation process of the ternary surfactant low-temperature detergent includes the ternary surfactant low-temperature detergent as described above, and its steps are as follows:

[0037] S1: Pre-dissolution of sodium percarbonate

[0038] Weigh sodium percarbonate according to the formula ratio, add it to an appropriate amount of water, and dissolve it. The amount of water used is 3 - 5 times the mass of sodium percarbonate. Start the dissolution tank of the stirring device, with a stirring speed of 100 - 150 r / min, a dissolution temperature controlled at 40 - 50 °C, and a dissolution time of 15 - 25 minutes to ensure that sodium percarbonate is completely dissolved. When pre-dissolving sodium percarbonate, add an appropriate amount of stabilizer to the water. The addition amount of the stabilizer is 0.1% of the mass of sodium percarbonate. The stabilizer is selected from sodium carbonate or sodium bicarbonate to prevent premature decomposition of sodium percarbonate during pre-dissolution and ensure that it can stably release active oxygen when mixed with the surfactant complex system in the subsequent process;

[0039] S2: Mixing of surfactants

[0040] Add sodium dodecylbenzenesulfonate, sodium lauryl polyoxyethylene ether sulfate, and fatty alcohol polyoxyethylene ether in the formula amount to the reaction kettle with heating and stirring functions in sequence, and then add 30% of the total water volume. Start stirring, with a stirring speed of 150 - 200 r / min, a mixing temperature controlled at 30 - 40 °C, and a stirring time of 20 - 30 minutes to make the surfactants fully dissolved and mixed evenly. When mixing the surfactants, sodium dodecylbenzenesulfonate and sodium lauryl polyoxyethylene ether sulfate can be first mixed evenly at 30 - 40 °C, and then fatty alcohol polyoxyethylene ether is added to make the three surfactants interact better with each other;

[0041] S3: Add the pre-dissolved sodium percarbonate solution

[0042] Slowly add the pre-dissolved sodium percarbonate solution in step one to the reaction kettle in step two, continue stirring, with the stirring speed maintained at 150 - 200 r / min. The addition time of the pre-dissolved sodium percarbonate solution is controlled at 10 - 15 minutes. After the addition is completed, continue stirring for 15 - 20 minutes to ensure that the sodium percarbonate solution and the surfactant are fully mixed;

[0043] S4: Add polyethylene glycol - 400

[0044] Weigh polyethylene glycol - 400 according to the formula amount, add it to the above reaction kettle, and continuously stir, with a stirring speed of 150 - 200 r / min and a stirring time of 10 - 15 minutes;

[0045] S5: Add sodium chloride in portions

[0046] Add the formula amount of sodium chloride to the above reaction kettle in 3 - 5 portions, with an interval time of 10 - 15 minutes between each addition. At the same time, stir, with a stirring speed of 150 - 200 r / min. By controlling the addition amount and number of times of sodium chloride, the viscosity of the detergent is controlled at 3000 ± 500 cps;

[0047] S6: Add neutral protease

[0048] When the temperature of the solution in the reaction kettle drops below 35°C, weigh neutral protease according to the formula amount, slowly add it to the above reaction kettle, continue stirring, the stirring speed is 100 - 150 r / min, and the stirring time is 15 - 20 minutes to ensure that the protease is evenly dispersed in the system. When adding neutral protease, first dissolve the neutral protease in an appropriate amount of water to form a protease solution, and then slowly add the protease solution to the reaction kettle to make the neutral protease more evenly dispersed in the detergent system and avoid enzyme inactivation caused by too high local concentration. Set a temperature sensor in the reaction kettle to monitor the solution temperature in real time. When the temperature exceeds 35°C, immediately turn on the cooling circulating water system to quickly reduce the temperature below 35°C to ensure protease activity. The enzyme activity of neutral protease is between 10,000 - 20,000 U / g;

[0049] S7: Add fluorescent brightener VBL and make up water

[0050] Weigh fluorescent brightener VBL according to the formula amount and add it to the above reaction kettle, then add the remaining water to the total formula amount, stir evenly, the stirring speed is 100 - 150 r / min, and the stirring time is 15 - 20 minutes to make each component of the detergent fully mixed and uniform;

[0051] S8: Detection and packaging

[0052] Conduct quality inspection on the prepared detergent, including indicators such as appearance, odor, viscosity, pH value, and detergency. The pH value is controlled at 8.5 - 9.0. After passing the inspection, carry out filling and packaging.

[0053] Example 2

[0054] The present invention provides an example: a ternary surfactant low-temperature detergent, calculated by mass percentage, includes the following components: sodium dodecylbenzenesulfonate 12%, sodium fatty alcohol polyoxyethylene ether sulfate 8%, fatty alcohol polyoxyethylene ether 3%, sodium percarbonate 10.5%, neutral protease 0.5%, polyethylene glycol - 400 2.5%, sodium chloride 1.2%, fluorescent brightener VBL 0.08% and water 68%. The purity of sodium dodecylbenzenesulfonate ≥ 98%, and the carbon chain length of the straight-chain alkyl group in its molecule is mainly C10 - C14. In sodium fatty alcohol polyoxyethylene ether sulfate, the degree of ethoxylation is 2 - 3. In fatty alcohol polyoxyethylene ether, the carbon chain length of the fatty alcohol is C12 - C14, and the degree of ethoxylation is 9 - 10.

[0055] The preparation process of the ternary surfactant low-temperature detergent includes the ternary surfactant low-temperature detergent as described above, and its steps are as follows:

[0056] S1: Pre-dissolve sodium percarbonate

[0057] Weigh sodium percarbonate according to the formula ratio, add it to an appropriate amount of water, and dissolve it. The amount of water used is 3 - 5 times the mass of sodium percarbonate. Start the dissolution tank of the stirring device, with a stirring speed of 100 - 150 r / min, a dissolution temperature controlled at 40 - 50 °C, and a dissolution time of 15 - 25 minutes to ensure complete dissolution of sodium percarbonate. When pre-dissolving sodium percarbonate, add an appropriate amount of stabilizer to the water. The addition amount of the stabilizer is 0.3% of the mass of sodium percarbonate. The stabilizer is selected from sodium carbonate or sodium bicarbonate to prevent premature decomposition of sodium percarbonate during pre-dissolution and ensure its stable release of active oxygen when mixed with the surfactant complex system in the subsequent process;

[0058] S2: Mixing of surfactants

[0059] Add sodium dodecylbenzenesulfonate, sodium lauryl ether sulfate, and fatty alcohol polyoxyethylene ether in the formula amount in turn to a reaction kettle with heating and stirring functions, and then add 35% of the total water volume. Start stirring, with a stirring speed of 150 - 200 r / min, a mixing temperature controlled at 30 - 40 °C, and a stirring time of 20 - 30 minutes to fully dissolve and mix the surfactants evenly. When mixing the surfactants, sodium dodecylbenzenesulfonate and sodium lauryl ether sulfate can be first mixed evenly at 30 - 40 °C, and then fatty alcohol polyoxyethylene ether is added to make the three surfactants interact better with each other;

[0060] S3: Add the pre-dissolved sodium percarbonate solution

[0061] Slowly add the pre-dissolved sodium percarbonate solution in Step 1 to the reaction kettle in Step 2, continue stirring, with the stirring speed maintained at 150 - 200 r / min. The addition time of the pre-dissolved sodium percarbonate solution is controlled at 10 - 15 minutes. After the addition is completed, continue stirring for 15 - 20 minutes to ensure full mixing of the sodium percarbonate solution and the surfactant;

[0062] S4: Add polyethylene glycol - 400

[0063] Weigh polyethylene glycol - 400 according to the formula amount, add it to the above reaction kettle, and continuously stir, with a stirring speed of 150 - 200 r / min and a stirring time of 10 - 15 minutes;

[0064] S5: Add sodium chloride in portions

[0065] Add the formula amount of sodium chloride to the above reaction kettle in 3 - 5 portions, with an interval time of 10 - 15 minutes between each addition, and stir simultaneously, with a stirring speed of 150 - 200 r / min. By controlling the addition amount and number of times of sodium chloride, the viscosity of the detergent is controlled at 3000 ± 500 cps;

[0066] S6: Add neutral protease

[0067] When the temperature of the solution in the reactor drops below 35°C, weigh neutral protease according to the formula amount, slowly add it to the above-mentioned reactor, continue stirring, the stirring speed is 100 - 150 r / min, and the stirring time is 15 - 20 minutes to ensure that the protease is evenly dispersed in the system. When adding neutral protease, first dissolve the neutral protease in an appropriate amount of water to form a protease solution, and then slowly add the protease solution to the reactor to make the neutral protease more evenly dispersed in the detergent system and avoid enzyme inactivation caused by too high local concentration. A temperature sensor is set in the reactor to monitor the solution temperature in real time. When the temperature exceeds 35°C, immediately turn on the cooling circulating water system to quickly reduce the temperature below 35°C to ensure protease activity. The enzyme activity of neutral protease is between 10000 - 20000 U / g;

[0068] S7: Add fluorescent brightener VBL and make up water

[0069] Weigh fluorescent brightener VBL according to the formula amount and add it to the above-mentioned reactor, then add the remaining water to the total formula amount, stir evenly, the stirring speed is 100 - 150 r / min, and the stirring time is 15 - 20 minutes to make all components of the detergent fully mixed and uniform;

[0070] S8: Detection and packaging

[0071] Conduct quality inspection on the prepared detergent, including indicators such as appearance, odor, viscosity, pH value, and detergency. The pH value is controlled at 8.5 - 9.0. After passing the inspection, carry out filling and packaging.

[0072] Example 3

[0073] The present invention provides an example: a ternary surfactant low-temperature detergent, by mass percentage, includes the following components: sodium dodecylbenzenesulfonate 12%, sodium lauryl polyoxyethylene ether sulfate 8%, fatty alcohol polyoxyethylene ether 3%, sodium percarbonate 15%, neutral protease 1%, polyethylene glycol - 400 5%, sodium chloride 2%, fluorescent brightener VBL 0.08% and water 75%. The purity of sodium dodecylbenzenesulfonate ≥ 98%, and the carbon chain length of the straight-chain alkyl group in its molecule is mainly C10 - C14. In sodium lauryl polyoxyethylene ether sulfate, the degree of ethoxylation is 2 - 3. In fatty alcohol polyoxyethylene ether, the carbon chain length of the fatty alcohol is C12 - C14, and the degree of ethoxylation is 9 - 10.

[0074] The preparation process of the ternary surfactant low-temperature detergent includes the ternary surfactant low-temperature detergent as described above, and its steps are as follows:

[0075] S1: Pre-dissolve sodium percarbonate

[0076] Weigh sodium percarbonate according to the formulation ratio, add it to an appropriate amount of water and dissolve it. The amount of water used is 3 - 5 times the mass of sodium percarbonate. Start the dissolution tank of the stirring device, with a stirring speed of 100 - 150 r / min, a dissolution temperature controlled at 40 - 50 °C, and a dissolution time of 15 - 25 minutes to ensure complete dissolution of sodium percarbonate. When pre-dissolving sodium percarbonate, add an appropriate amount of stabilizer to the water. The addition amount of the stabilizer is 0.5% of the mass of sodium percarbonate. The stabilizer is selected from sodium carbonate or sodium bicarbonate to prevent premature decomposition of sodium percarbonate during pre-dissolution and ensure its stable release of active oxygen when mixed with the surfactant complex system in the subsequent process;

[0077] S2: Mixing of surfactants

[0078] Add sodium dodecylbenzenesulfonate, sodium lauryl ether sulfate and fatty alcohol polyoxyethylene ether in the formulation amounts in a reaction kettle with heating and stirring functions, and then add water accounting for 40% of the total water amount. Start stirring, with a stirring speed of 150 - 200 r / min, a mixing temperature controlled at 30 - 40 °C, and a stirring time of 20 - 30 minutes to fully dissolve and mix the surfactants evenly. When mixing the surfactants, sodium dodecylbenzenesulfonate and sodium lauryl ether sulfate can be first mixed evenly at 30 - 40 °C and then fatty alcohol polyoxyethylene ether is added to make the three surfactants interact better with each other;

[0079] S3: Add the pre-dissolved sodium percarbonate solution

[0080] Slowly add the pre-dissolved sodium percarbonate solution in Step 1 to the reaction kettle in Step 2, continue stirring, with the stirring speed maintained at 150 - 200 r / min. The addition time of the pre-dissolved sodium percarbonate solution is controlled at 10 - 15 minutes. After the addition is completed, continue stirring for 15 - 20 minutes to ensure full mixing of the sodium percarbonate solution and the surfactants;

[0081] S4: Add polyethylene glycol - 400

[0082] Weigh polyethylene glycol - 400 according to the formulation amount, add it to the above reaction kettle, and continuously stir, with a stirring speed of 150 - 200 r / min and a stirring time of 10 - 15 minutes;

[0083] S5: Add sodium chloride in portions

[0084] Add the formulation amount of sodium chloride to the above reaction kettle in 3 - 5 portions, with an interval time of 10 - 15 minutes between each addition. At the same time, stir, with a stirring speed of 150 - 200 r / min. By controlling the addition amount and number of times of sodium chloride, the viscosity of the detergent is controlled at 3000 ± 500 cps;

[0085] S6: Add neutral protease

[0086] When the temperature of the solution in the reactor drops below 35°C, weigh neutral protease according to the formula amount, slowly add it to the above-mentioned reactor, continue stirring, with the stirring speed at 100 - 150 r / min and the stirring time at 15 - 20 minutes, to ensure that the protease is evenly dispersed in the system. When adding neutral protease, first dissolve the neutral protease in an appropriate amount of water to form a protease solution, and then slowly add the protease solution to the reactor to make the neutral protease more evenly dispersed in the detergent system, avoiding enzyme inactivation caused by too high local concentration. Set a temperature sensor in the reactor to monitor the solution temperature in real time. When the temperature exceeds 35°C, immediately turn on the cooling circulating water system to quickly lower the temperature below 35°C to ensure protease activity. The enzyme activity of neutral protease is between 10,000 - 20,000 U / g;

[0087] S7: Add fluorescent brightener VBL and make up water

[0088] Weigh fluorescent brightener VBL according to the formula amount and add it to the above-mentioned reactor, then add the remaining water to the total formula amount, stir evenly, with the stirring speed at 100 - 150 r / min and the stirring time at 15 - 20 minutes, to make all components of the detergent fully mixed and uniform;

[0089] S8: Detection and packaging

[0090] Conduct quality inspection on the prepared detergent, including indicators such as appearance, odor, viscosity, pH value, and detergency. Control the pH value at 8.5 - 9.0. After passing the inspection, carry out filling and packaging.

[0091] Experimental examples

[0092] Divide Examples 1, 2, 3 and the traditional detergent as Example 4 into four groups for experimental treatment;

[0093] Evenly apply stains on the cloth samples, dry them and cut them into the same size. Then add the same amount of the above four groups of detergents respectively, wash them in a 40°C water bath for 30 minutes, rinse and dry. Use a spectrophotometer to measure the stain residue rate and calculate the detergency; use a scanning electron microscope to observe the changes in the surface morphology of fabric fibers before and after washing, and measure indicators such as the breaking strength and whiteness of the fabric before and after washing; calculate the cost of each component in the two detergents respectively, compare the total costs, and use a rotational rheometer to measure the viscosity of the detergent at different temperatures and observe the low-temperature fluidity. The test data analysis results are as follows;

[0094]

[0095]

Claims

1. A ternary surfactant low-temperature detergent, characterized in that: The invention comprises the following components by mass percentage: 12% of sodium dodecylbenzene sulfonate, 8% of sodium sulfate of fatty alcohol polyoxyethylene ether, 3% of fatty alcohol polyoxyethylene ether, 5%-15% of sodium percarbonate, 0.1%-1% of neutral protease, 1%-5% of polyethylene glycol-400, 0.5%-2% of sodium chloride, 0.08% of fluorescent whitening agent VBL and 60%-75% of water.

2. The ternary surfactant low-temperature detergent according to claim 1, characterized in that: The purity of sodium dodecylbenzene sulfonate is ≥98%, and the carbon chain length of the linear alkyl group in the molecule is mainly C10-C14.

3. The ternary surfactant low-temperature detergent according to claim 1, characterized in that: In sodium fatty alcohol polyoxyethylene ether sulfate, the degree of ethoxylation is 2-3.

4. The ternary surfactant low-temperature detergent according to claim 1, characterized in that: In fatty alcohol polyoxyethylene ether, the carbon chain length of fatty alcohol is C12-C14, and the degree of ethoxylation is 9-10.

5. The preparation process of the ternary surfactant low-temperature detergent is characterized in that The method comprises the following steps: S1: Sodium percarbonate pre-dissolved Weigh sodium percarbonate according to the formula ratio, add it to an appropriate amount of water to dissolve it. The amount of water used is 3-5 times the mass of sodium percarbonate. Start the dissolving tank of the stirring device, the stirring speed is 100-150r / min, the dissolving temperature is controlled at 40-50℃, and the dissolving time is 15-25 minutes to ensure that the sodium percarbonate is completely dissolved; S2: Surfactant Mixing In a reaction kettle with heating and stirring functions, sodium dodecylbenzene sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate and fatty alcohol polyoxyethylene ether are added in the formula amount in sequence, and then water accounting for 30% to 40% of the total water volume is added, and stirring is started at a stirring speed of 150-200 r / min, the mixing temperature is controlled at 30-40° C., and the stirring time is 20-30 minutes to fully dissolve the surfactant and mix it evenly; S3: Add pre-dissolved sodium percarbonate solution Slowly add the pre-dissolved sodium percarbonate solution in step 1 to the reactor in step 2, and continue stirring at a stirring speed of 150-200 r / min; S4: Add polyethylene glycol-400 Weigh polyethylene glycol-400 according to the formula amount, add it to the above reaction kettle, and continue stirring at a speed of 150-200 r / min for 10-15 minutes; S5: Add sodium chloride in batches Add the formulated amount of sodium chloride into the above reactor in 3-5 times, with an interval of 10-15 minutes between each addition, and stir at a speed of 150-200 r / min. By controlling the amount and number of additions of sodium chloride, the viscosity of the detergent is controlled at 3000±500cps; S6: Add neutral protease When the temperature of the solution in the reactor drops below 35°C, weigh the neutral protease according to the formula, slowly add it into the above reactor, and continue stirring at a speed of 100-150r / min for 15-20 minutes to ensure that the protease is evenly dispersed in the system; S7: Add fluorescent whitening agent VBL and replenish water Weigh the fluorescent brightener VBL according to the formula amount and add it to the above reaction kettle, then add the remaining water to the total amount of the formula, stir evenly, the stirring speed is 100-150r / min, the stirring time is 15-20 minutes, so that the ingredients of the detergent are fully mixed; S8: Testing and Packaging The prepared detergent is subjected to quality inspection, including indicators of appearance, odor, viscosity, pH value, and detergency. The pH value is controlled at 8.5-9.

0. After passing the inspection, it is filled and packaged.

6. The preparation process of the ternary surfactant low-temperature detergent according to claim 5, characterized in that: When the sodium percarbonate in S1 is pre-dissolved, a proper amount of stabilizer is added to the water. The amount of the stabilizer added is 0.1% to 0.5% of the mass of the sodium percarbonate. The stabilizer is sodium carbonate or sodium bicarbonate to prevent the sodium percarbonate from decomposing prematurely during the pre-dissolution process and ensure that it can stably release active oxygen when it is subsequently mixed with the surfactant compound system.

7. The preparation process of the ternary surfactant low-temperature detergent according to claim 5, characterized in that: When the surfactants in S2 are mixed, sodium dodecylbenzene sulfonate and sodium fatty alcohol polyoxyethylene ether sulfate can be first mixed evenly at 30-40° C., and then fatty alcohol polyoxyethylene ether can be added to allow the three surfactants to interact better.

8. The process for preparing the ternary surfactant low-temperature detergent according to claim 5, characterized in that: The addition time of the pre-dissolved sodium percarbonate solution in S3 is controlled within 10-15 minutes. After the addition is completed, stirring is continued for 15-20 minutes to ensure that the sodium percarbonate solution and the surfactant are fully mixed.

9. The process for preparing the ternary surfactant low-temperature detergent according to claim 5, characterized in that: When adding neutral protease in S6, the neutral protease is first dissolved in an appropriate amount of water to form a protease solution, and then the protease solution is slowly added to the reactor to make the neutral protease more evenly dispersed in the detergent system to avoid excessive local concentration leading to enzyme inactivation.

10. The preparation process of the ternary surfactant low-temperature detergent according to claim 5, characterized in that: When neutral protease is added to S6, a temperature sensor is set in the reactor to monitor the solution temperature in real time. When the temperature exceeds 35°C, the cooling circulating water system is immediately turned on to quickly reduce the temperature to below 35°C to ensure the activity of the protease. The enzyme activity of the neutral protease is between 10,000 and 20,000 U / g.

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