Biodegradable snow-melting agent and preparation method thereof

Abstract

The application relates to the technical field of snow-melting agents, and particularly discloses a biodegradable snow-melting agent and a preparation method thereof. The biodegradable snow-melting agent comprises the following raw materials in parts by weight: a freezing point depressant 30-50 parts, sodium gluconate 3-8 parts, a bio-based fatty alcohol polyoxyethylene ether 1-3 parts, a composite emulsifying thickener 0.6-2.5 parts, a low-temperature anti-freezing enhancer 2-5 parts, and water 50-60 parts. The composite emulsifying thickener comprises a locust bean gum and a sucrose ester in a weight ratio of 1:(4-10). The application helps to improve the low-temperature stability of the biodegradable snow-melting agent.

Description

Technical Field

[0001] This invention relates to the technical field of snow melting agents, and in particular to a biodegradable snow melting agent and its preparation method. Background Technology

[0002] Winter snow and ice accumulation on roads severely impacts traffic safety and efficiency, making the application of de-icing agents the most widespread and effective active snow and ice removal method. Traditional chloride-based de-icing agents dominate the market due to their abundant resources, low cost, and high snow-melting efficiency. However, chlorides cannot be effectively decomposed by microorganisms in nature, making them persistent pollutants. Chloride ions have a strong corrosive effect on metals and reinforced concrete structures, leading to significant economic losses and safety hazards. Therefore, there is a need to develop a de-icing agent that combines high snow-melting efficiency, low corrosivity, and biodegradability.

[0003] In related technologies, a biodegradable snow-melting and de-icing agent is disclosed, containing the following components by weight percentage: 20%–60% freezing point lowering agent, 1%–8% ice lattice disruptor, 2%–5% anti-icing adhesion agent, 0.05%–2% thickener, 0.05%–5% surfactant, and the balance being solvent. The ice lattice disruptor is polyether-modified heptamethyltrisiloxane or 1,2-di(triethoxysilyl)ethane, and the anti-icing adhesion agent is one of 2,6,10,14-tetramethylpentadecane, triacontadecene, or 2,6,10,15,19,23-hexamethyltetracosane.

[0004] However, the aforementioned biodegradable snow-melting and de-icing agents contain a large amount of organic matter such as organosilicon / silane compounds and long-chain alkanes. Organosilicon compounds and long-chain alkanes have poor compatibility with water-based solvents. Even when emulsions or dispersions are formed with the help of surfactants and thickeners, they are extremely unstable at low temperatures and are prone to demulsification, stratification, and solidification, leading to difficulties in storage, transportation, and use. Summary of the Invention

[0005] To improve the low-temperature stability of biodegradable snow melting and de-icing agents, this application provides a biodegradable snow melting agent and its preparation method.

[0006] Firstly, this application provides a biodegradable snow-melting agent, which adopts the following technical solution: A biodegradable de-icing agent comprises the following raw materials in parts by weight: 30-50 parts of freezing point lowering agent, 3-8 parts of sodium gluconate, 1-3 parts of bio-based fatty alcohol polyoxyethylene ether, 0.6-2.5 parts of composite emulsifying thickener, 2-5 parts of low-temperature antifreeze enhancer, and 50-60 parts of water. The composite emulsifying thickener comprises locust bean gum and sucrose ester in a weight ratio of 1:(4-10).

[0007] In one specific implementation, the freezing point lowering agent includes at least one of potassium formate, potassium acetate, potassium lactate, and potassium propylene glycol.

[0008] In one specific implementation, the cryogenic antifreeze enhancer is ethylene glycol butyl ether or polyethylene glycol 400.

[0009] In one specific feasible embodiment, the bio-based fatty alcohol polyoxyethylene ether is prepared according to the following steps: Natural fatty alcohols and solid base catalysts are mixed at a weight ratio of 100:(0.25-0.4), heated to 100-120℃, vacuumed, and dehydrated to obtain pretreated material; Under nitrogen protection, the pretreated material is heated to 150-180℃, ethylene oxide is introduced, and the pressure is increased to 0.2-0.5MPa. The rate of ethylene oxide introduction is adjusted, and the pressure is maintained at 0.2-0.5MPa. After all the ethylene oxide has been introduced, the mixture is kept warm and stirred for 30-60 minutes to obtain the reaction material. The reactants were cooled to 80-100℃, the pH was adjusted to 6-7, and then cooled to room temperature to obtain bio-based fatty alcohol polyoxyethylene ether.

[0010] In one specific implementation scheme, the mass ratio of ethylene oxide to natural fatty alcohol is (1.54-2.2):1.

[0011] In one specific implementation, the natural fatty alcohol is any one of lauryl alcohol, cocoyl alcohol, and oleyl alcohol.

[0012] In one specific implementation, the biodegradable de-icing agent further includes trehalose.

[0013] Secondly, this application provides a method for preparing a biodegradable snow-melting agent, which adopts the following technical solution: A method for preparing a biodegradable snow melting agent includes the following steps: Dissolve sucrose ester in water, add locust bean gum, mix well, shear and disperse at 1500-2000 rpm for 15-20 minutes, heat to 70-75℃, stir at 300-400 rpm for 30-45 minutes to obtain composite colloidal base liquid; Sodium gluconate and low-temperature antifreeze enhancer were added to the composite colloidal base solution under stirring and stirred evenly to obtain the aqueous phase component; the freezing point lowering agent was added to the aqueous phase component, the temperature was kept ≤45℃, and stirred evenly to obtain the salt-gel composite solution. Under stirring, bio-based fatty alcohol polyoxyethylene ether is added to the salt glue composite liquid, and homogenized by circulation under a pressure of 25-35 MPa. After homogenization, degassing and filtration are performed to obtain a biodegradable snow melting agent.

[0014] In summary, this application has the following beneficial effects: 1. This application improves the low-temperature stability of biodegradable snow-melting and de-icing agents by using a limited ratio of a freezing point lowering agent, sodium gluconate, bio-based fatty alcohol polyoxyethylene ether, a composite emulsifying thickener, a low-temperature antifreeze enhancer, and water, wherein the composite emulsifying thickener includes locust bean gum and sucrose ester in a weight ratio of 1:(4-10).

[0015] 2. In this application, the preferred mass ratio of ethylene oxide to natural fatty alcohol is (1.54-2.2):1, which helps to further improve the low-temperature stability of the biodegradable snow melting and de-icing agent.

[0016] 3. Trehalose is preferred in this application, which helps to further improve the low-temperature stability of biodegradable snow melting and de-icing agents. Detailed Implementation

[0017] Unless otherwise specified, all raw materials used in this application are commercially available. Locust bean gum, model XH52801W7D7S, with an active ingredient content of 99%. Sucrose ester is sucrose isobutyrate acetate, CAS number 34482-63-8. Lauryl alcohol, CAS number 112-53-8, with an active ingredient content of 99%. Sodium gluconate, CAS number 527-07-1. Coconut oil alcohol is C12-14-fatty alcohol, model KMK.

[0018] The present application will be further described in detail below with reference to embodiments and comparative examples.

[0019] Example Example 1 This embodiment provides a biodegradable de-icing agent, comprising the following raw materials: 40 kg potassium formate, 6.5 kg sodium gluconate, 2 kg bio-based fatty alcohol polyoxyethylene ether, 1.5 kg composite emulsifying thickener, 3.5 kg ethylene glycol butyl ether, and 55 kg water. The composite emulsifying thickener comprises locust bean gum and sucrose ester in a weight ratio of 1:7.

[0020] Bio-based fatty alcohol polyoxyethylene ethers are prepared according to the following steps: Lauryl alcohol was placed in a pressure reactor, and KOH was added. The weight ratio of lauryl alcohol to KOH was 100:0.32. The mixture was heated to 110°C with stirring at 80 rpm, and then evacuated to -0.095 MPa. The pressure was maintained for 60 min to complete the dehydration. The vacuum was then turned off to obtain the pretreated material.

[0021] Under nitrogen protection, the pretreated material was heated to 150°C, and then ethylene oxide gas was introduced to raise the pressure in the pressure reactor to 0.35 MPa. The ethylene oxide introduction rate was adjusted to maintain the pressure within the range of 0.2-0.5 MPa. After all the ethylene oxide had been introduced, the mixture was kept at this temperature and stirred for another 45 minutes to obtain the reactants. The mass ratio of ethylene oxide to lauryl alcohol was 1.9:1.

[0022] The reactants were cooled to 90°C, the pH was adjusted to 6.5, and then cooled to room temperature to obtain bio-based fatty alcohol polyoxyethylene ether.

[0023] This embodiment also provides a method for preparing a biodegradable snow melting agent, comprising the following steps: According to the formula, sucrose ester was dissolved in water, locust bean gum was added, and the mixture was mixed evenly. The mixture was sheared and dispersed at 1750 rpm for 18 minutes, heated to 72.5℃, and stirred at 350 rpm for 37.5 minutes to obtain a composite colloidal base liquid.

[0024] Sodium gluconate and ethylene glycol butyl ether were added to the composite colloidal base solution under stirring at 500 rpm and stirred until homogeneous to obtain the aqueous phase component. Potassium formate was added to the aqueous phase component, and cooling water was turned on to maintain the temperature ≤45℃. After stirring until homogeneous, the salt-colloid composite solution was obtained.

[0025] Bio-based fatty alcohol polyoxyethylene ether was added to the salt gel composite solution under stirring at 500 rpm. After stirring evenly, the solution was fed into a high-pressure homogenizer and homogenized three times under a pressure of 30 MPa. Then, vacuum degassing was performed, and the solution was filtered through a 200-mesh filter to obtain a biodegradable snow melting agent.

[0026] Example 2 The only difference between this embodiment and Embodiment 1 is that the biodegradable de-icing agent includes the following raw materials: 30 kg potassium formate, 3 kg sodium gluconate, 1 kg bio-based fatty alcohol polyoxyethylene ether, 0.6 kg composite emulsifying thickener, 2 kg ethylene glycol butyl ether, and 50 kg water.

[0027] Example 3 The only difference between this embodiment and Embodiment 1 is that the biodegradable de-icing agent includes the following raw materials: 50 kg potassium formate, 8 kg sodium gluconate, 3 kg bio-based fatty alcohol polyoxyethylene ether, 2.5 kg composite emulsifying thickener, 5 kg ethylene glycol butyl ether, and 60 kg water.

[0028] Example 4 The only difference between this embodiment and Embodiment 1 is that, in the raw materials and preparation method of the biodegradable snow melting agent, potassium lactate is used to replace potassium formate in equal amounts.

[0029] Example 5 The only difference between this embodiment and Example 1 is that, in the raw materials and preparation method of the biodegradable snow melting agent, potassium formate is replaced by a mixture of potassium formate, potassium acetate, potassium lactate and potassium propylene glycol in an equal weight ratio of 1:1:1:1.

[0030] Example 6 The only difference between this embodiment and Example 1 is that, in the raw materials and preparation method of the biodegradable snow melting agent, an equal amount of polyethylene glycol 400 is used to replace ethylene glycol butyl ether.

[0031] Example 7 The only difference between this embodiment and Example 1 is that the bio-based fatty alcohol polyoxyethylene ether is prepared according to the following steps: Lauryl alcohol was placed in a pressure reactor, and KOH was added. The weight ratio of lauryl alcohol to KOH was 100:0.32. The mixture was heated to 100°C with stirring at 80 rpm, and then evacuated to -0.095 MPa. The pressure was maintained for 60 min to complete the dehydration. The vacuum was then turned off to obtain the pretreated material.

[0032] Under nitrogen protection, the pretreated material was heated to 165℃, and then ethylene oxide gas was introduced to raise the pressure in the pressure reactor to 0.2 MPa. The ethylene oxide introduction rate was adjusted to maintain the pressure within the range of 0.2-0.5 MPa. After all the ethylene oxide had been introduced, the mixture was kept at this temperature and stirred for another 30 minutes to obtain the reactants. The mass ratio of ethylene oxide to lauryl alcohol was 1.9:1.

[0033] The reactants were cooled to 80°C, the pH was adjusted to 6, and then cooled to room temperature to obtain bio-based fatty alcohol polyoxyethylene ether.

[0034] Example 8 The only difference between this embodiment and Example 1 is that the bio-based fatty alcohol polyoxyethylene ether is prepared according to the following steps: Lauryl alcohol was placed in a pressure reactor, and KOH was added. The weight ratio of lauryl alcohol to KOH was 100:0.32. The mixture was heated to 120°C with stirring at 80 rpm, and then evacuated to -0.095 MPa. The pressure was maintained for 60 min to complete the dehydration. The vacuum was then turned off to obtain the pretreated material.

[0035] Under nitrogen protection, the pretreated material was heated to 180℃, and then ethylene oxide gas was introduced to raise the pressure in the pressure reactor to 0.5 MPa. The ethylene oxide introduction rate was adjusted to maintain the pressure within the range of 0.2-0.5 MPa. After all the ethylene oxide had been introduced, the mixture was kept at this temperature and stirred for another 60 minutes to obtain the reactants. The mass ratio of ethylene oxide to lauryl alcohol was 1.9:1.

[0036] The reactants were cooled to 100°C, the pH was adjusted to 7, and then cooled to room temperature to obtain bio-based fatty alcohol polyoxyethylene ether.

[0037] Example 9 The only difference between this embodiment and Example 1 is that, in the preparation step of bio-based fatty alcohol polyoxyethylene ether, the weight ratio of lauryl alcohol to KOH is 100:0.2.

[0038] Example 10 The only difference between this embodiment and Example 1 is that, in the preparation step of bio-based fatty alcohol polyoxyethylene ether, the weight ratio of lauryl alcohol to KOH is 100:0.25.

[0039] Example 11 The only difference between this embodiment and Example 1 is that, in the preparation step of bio-based fatty alcohol polyoxyethylene ether, the weight ratio of lauryl alcohol to KOH is 100:0.4.

[0040] Example 12 The only difference between this embodiment and Example 1 is that, in the preparation step of bio-based fatty alcohol polyoxyethylene ether, the weight ratio of lauryl alcohol to KOH is 100:0.45.

[0041] Example 13 The only difference between this embodiment and Example 1 is that, in the preparation step of bio-based fatty alcohol polyoxyethylene ether, the mass ratio of ethylene oxide to lauryl alcohol is 1.5:1.

[0042] Example 14 The only difference between this embodiment and Example 1 is that, in the preparation step of bio-based fatty alcohol polyoxyethylene ether, the mass ratio of ethylene oxide to lauryl alcohol is 1.54:1.

[0043] Example 15 The only difference between this embodiment and Example 1 is that, in the preparation step of bio-based fatty alcohol polyoxyethylene ether, the mass ratio of ethylene oxide to lauryl alcohol is 2.2:1.

[0044] Example 16 The only difference between this embodiment and Example 1 is that, in the preparation step of bio-based fatty alcohol polyoxyethylene ether, the mass ratio of ethylene oxide to lauryl alcohol is 2.5:1.

[0045] Example 17 The only difference between this embodiment and Embodiment 1 is that, in the preparation step of bio-based fatty alcohol polyoxyethylene ether, an equal amount of coconut oil alcohol is used to replace lauryl alcohol.

[0046] Example 18 The only difference between this embodiment and Embodiment 1 is that the biodegradable de-icing agent includes the following raw materials: 40 kg potassium formate, 6.5 kg sodium gluconate, 2 kg bio-based fatty alcohol polyoxyethylene ether, 1.5 kg composite emulsifying thickener, 3.5 kg ethylene glycol butyl ether, 55 kg water, and 2 kg trehalose. The composite emulsifying thickener includes locust bean gum and sucrose ester in a weight ratio of 1:7.

[0047] This embodiment also provides a method for preparing a biodegradable snow melting agent, comprising the following steps: According to the formula, sucrose ester was dissolved in water, locust bean gum was added, and the mixture was mixed evenly. The mixture was sheared and dispersed at 1750 rpm for 18 minutes, heated to 72.5℃, and stirred at 350 rpm for 37.5 minutes to obtain a composite colloidal base liquid.

[0048] Sodium gluconate and ethylene glycol butyl ether were added to the composite colloidal base solution under stirring at 500 rpm and stirred until homogeneous to obtain the aqueous phase component. Potassium formate and trehalose were added to the aqueous phase component, the cooling water was turned on to maintain the temperature ≤45℃, and after stirring until homogeneous, the salt-colloid composite solution was obtained.

[0049] Bio-based fatty alcohol polyoxyethylene ether was added to the salt gel composite solution under stirring at 500 rpm. After stirring evenly, the solution was fed into a high-pressure homogenizer and homogenized three times under a pressure of 30 MPa. Then, vacuum degassing was performed, and the solution was filtered through a 200-mesh filter to obtain a biodegradable snow melting agent.

[0050] Example 19 The only difference between this embodiment and Example 1 is that the preparation method of the biodegradable snow melting agent includes the following steps: According to the formula, sucrose ester is dissolved in water, locust bean gum is added, and the mixture is mixed evenly. The mixture is sheared and dispersed at 1500 rpm for 15 minutes, heated to 70℃, and stirred at 300 rpm for 30 minutes to obtain a composite colloidal base liquid.

[0051] Sodium gluconate and ethylene glycol butyl ether were added to the composite colloidal base solution under stirring at 500 rpm and stirred until homogeneous to obtain the aqueous phase component. Potassium formate was added to the aqueous phase component, and cooling water was turned on to maintain the temperature ≤45℃. After stirring until homogeneous, the salt-colloid composite solution was obtained.

[0052] Bio-based fatty alcohol polyoxyethylene ether was added to the salt gum composite solution under stirring at 500 rpm. After stirring evenly, the solution was fed into a high-pressure homogenizer and homogenized three times under a pressure of 25 MPa. Then, vacuum degassing was performed, and the solution was filtered through a 200-mesh filter to obtain a biodegradable snow melting agent.

[0053] Example 20 The only difference between this embodiment and Example 1 is that the preparation method of the biodegradable snow melting agent includes the following steps: According to the formula, sucrose ester was dissolved in water, locust bean gum was added, and the mixture was mixed evenly. The mixture was sheared and dispersed at 2000 rpm for 20 minutes, heated to 75℃, and stirred at 400 rpm for 45 minutes to obtain a composite colloidal base liquid.

[0054] Sodium gluconate and ethylene glycol butyl ether were added to the composite colloidal base solution under stirring at 500 rpm and stirred until homogeneous to obtain the aqueous phase component. Potassium formate was added to the aqueous phase component, and cooling water was turned on to maintain the temperature ≤45℃. After stirring until homogeneous, the salt-colloid composite solution was obtained.

[0055] Bio-based fatty alcohol polyoxyethylene ether was added to the salt gum composite solution under stirring at 500 rpm. After stirring evenly, the solution was fed into a high-pressure homogenizer and homogenized three times at a pressure of 35 MPa. Then, vacuum degassing was performed, and the solution was filtered through a 200-mesh filter to obtain a biodegradable snow melting agent.

[0056] Comparative Example Comparative Example 1 The only difference between this comparative example and Example 1 is that, in the raw materials and preparation method of the biodegradable snow melting agent, an equal amount of potassium formate is used to replace sodium gluconate.

[0057] Comparative Example 2 The only difference between this comparative example and Example 1 is that, in the raw materials and preparation method of the biodegradable snow melting agent, an equal amount of potassium formate is used to replace the bio-based fatty alcohol polyoxyethylene ether.

[0058] Comparative Example 3 The only difference between this comparative example and Example 1 is that, in the raw materials and preparation method of the biodegradable snow melting agent, an equal amount of potassium formate is used to replace the composite emulsifying thickener.

[0059] Comparative Example 4 The only difference between this comparative example and Example 1 is that, in the raw materials and preparation method of the biodegradable snow melting agent, an equal amount of potassium formate is used to replace ethylene glycol butyl ether.

[0060] Comparative Example 5 The only difference between this comparative example and Example 1 is that, in the raw materials and preparation method of the biodegradable snow melting agent, an equal amount of locust bean gum is used to replace the composite emulsifying thickener.

[0061] Performance testing The following performance tests were conducted on the biodegradable de-icing agents prepared in Examples 1-20 and Comparative Examples 1-5: A 30mm thick ice layer was placed in a test chamber at -30℃, and a biodegradable de-icing agent was sprayed onto the ice surface at a dosage of 30g / m². 2 The ice melting process was observed, and the time required for the ice to completely melt was recorded. A blank control group was also set up without the application of the biodegradable de-icing agent. The snow-melting and ice-reducing rate (mm / min) was calculated based on the formula: ice thickness / time for complete ice melting. The results are shown in Table 1.

[0062] The biodegradable de-icing agent was stirred at 25±2℃ for 30 minutes and then dispensed into multiple clean, dry centrifuge tubes, filling each tube to 80% capacity. The dispensed centrifuge tubes were placed in a -20℃ low-temperature test chamber. After 7 days, they were removed and centrifuged at 3000 rpm for 30 minutes at 4±1℃. Immediately after centrifugation, the percentage of sediment at the bottom of the centrifuge tube relative to the total volume was calculated. The results are shown in Table 1.

[0063] Table 1 Combining Example 1 and Comparative Examples 1-5 with Table 1, it can be seen that compared to Example 1, the percentage of sediment volume at the bottom of the centrifuge tubes in Comparative Examples 1-5 is significantly increased, exceeding 4%. Furthermore, the snow melting speed in Comparative Examples 2-4 is significantly reduced. This indicates that using the raw material ratio and preparation method of Example 1 helps to improve the low-temperature stability of the biodegradable snow melting and de-icing agent while maintaining a high snow melting speed, and reduces phenomena such as demulsification, stratification, and solidification of the snow melting agent at low temperatures.

[0064] As can be seen from Examples 1-20 and Table 1, the snow melting speed of Examples 1-20 is relatively high, and the percentage of sediment volume at the bottom of the centrifuge tube to the total volume is less than 2%. This indicates that by using the raw material ratios and preparation methods within the range of Examples 1-20, the low-temperature stability of the biodegradable snow melting and de-icing agent can be improved while maintaining a high snow melting speed.

[0065] By comparing the test data of each embodiment, it can be seen that using a mass ratio of ethylene oxide to natural fatty alcohol of (1.54-2.2):1 and adding trehalose both help to further improve the low-temperature stability of biodegradable snow melting and de-icing agents.

[0066] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A biodegradable snow-melting agent, characterized in that, The raw materials include the following parts by weight: 30-50 parts of freezing point lowering agent, 3-8 parts of sodium gluconate, 1-3 parts of bio-based fatty alcohol polyoxyethylene ether, 0.6-2.5 parts of composite emulsifying thickener, 2-5 parts of low temperature antifreeze enhancer, and 50-60 parts of water. The composite emulsifying thickener includes locust bean gum and sucrose ester in a weight ratio of 1:(4-10).

2. The biodegradable de-icing agent according to claim 1, characterized in that: The freezing point lowering agent includes at least one of potassium formate, potassium acetate, potassium lactate, and potassium propylene glycol.

3. The biodegradable de-icing agent according to claim 1, characterized in that: The low-temperature antifreeze enhancer is ethylene glycol butyl ether or polyethylene glycol 400.

4. The biodegradable de-icing agent according to claim 1, characterized in that: The bio-based fatty alcohol polyoxyethylene ether is prepared according to the following steps: Natural fatty alcohols and solid base catalysts are mixed at a weight ratio of 100:(0.25-0.4), heated to 100-120℃, vacuumed, and dehydrated to obtain a pretreated material. Under nitrogen protection, the pretreated material is heated to 150-180℃, ethylene oxide is introduced, and the pressure is increased to 0.2-0.5MPa. The rate of ethylene oxide introduction is adjusted, and the pressure is maintained at 0.2-0.5MPa. After all the ethylene oxide has been introduced, the mixture is kept warm and stirred for 30-60 minutes to obtain the reaction material. The reactants were cooled to 80-100℃, the pH was adjusted to 6-7, and then cooled to room temperature to obtain bio-based fatty alcohol polyoxyethylene ether.

5. The biodegradable de-icing agent according to claim 4, characterized in that: The mass ratio of ethylene oxide to natural fatty alcohol is (1.54-2.2):

1.

6. The biodegradable de-icing agent according to claim 5, characterized in that: The natural fatty alcohol is any one of lauryl alcohol, coconut oil alcohol, and oleyl alcohol.

7. The biodegradable de-icing agent according to claim 1, characterized in that: The biodegradable snow-melting agent also includes trehalose.

8. A method for preparing a biodegradable de-icing agent as described in any one of claims 1-7, characterized in that: Includes the following steps: Dissolve sucrose ester in water, add locust bean gum, mix well, shear and disperse at 1500-2000 rpm for 15-20 minutes, heat to 70-75℃, stir at 300-400 rpm for 30-45 minutes to obtain composite colloidal base liquid; Sodium gluconate and low-temperature antifreeze enhancer were added to the composite colloidal base solution under stirring and stirred evenly to obtain the aqueous phase component; the freezing point lowering agent was added to the aqueous phase component, the temperature was kept ≤45℃, and stirred evenly to obtain the salt-gel composite solution. Under stirring, bio-based fatty alcohol polyoxyethylene ether is added to the salt glue composite liquid, and homogenized by circulation under a pressure of 25-35 MPa. After homogenization, degassing and filtration are performed to obtain a biodegradable snow melting agent.

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