Organic snow-melting agent as well as preparation method and application thereof

Abstract

The invention provides an organic snow-melting agent as well as a preparation method and application thereof, and belongs to the technical field of snow-melting agents. The organic snow-melting agent is prepared from the following components in parts by weight: 18 to 22 parts of modified sodium lignin sulfonate, 10 to 12 parts of hydrolyzed polyglutamic acid, 5 to 7 parts of bagasse polyphenol extract, 12 to 14 parts of trehalose, 8 to 10 parts of trisodium citrate, 5 to 6 parts of glycerol, 12 to 14 parts of potassium humate, 8 to 10 parts of silicon-calcium-potassium-magnesium ore powder, 5 to 7 parts of water-retaining agent and 3 to 5 parts of complex microbial inoculant. According to the ecological snow-melting agent and the preparation method thereof provided by the invention, unexpected technical effects far better than those of the prior art are generated in the aspects of ice melting efficiency, low corrosivity and environmental friendliness.

Description

Technical Field

[0001] This application relates to the field of de-icing agent technology, and in particular to an organic de-icing agent, its preparation method and application. Background Technology

[0002] Existing de-icing agents are mainly divided into chloride-based (such as sodium chloride and calcium chloride) and organic-based (such as potassium acetate and sodium formate). While chloride-based de-icing agents are inexpensive, they are highly corrosive and cause significant damage to roads, vehicles, bridges, and vegetation. Furthermore, long-term use can lead to soil salinization. Organic-based de-icing agents are slightly more environmentally friendly, but they are expensive, perform poorly at low temperatures, and are prone to causing eutrophication of water bodies.

[0003] Currently, simple physical mixing composite de-icing agents are the mainstream research direction, but they have the following common problems: (1) Poor synergy of components: the components are only functionally superimposed and fail to produce a synergistic effect, resulting in large dosage and low efficiency. (2) Limited freezing point reduction ability: under extremely cold conditions (such as below -30℃), the de-icing efficiency drops sharply. (3) Incomplete corrosion inhibition: the added corrosion inhibitors are mostly single components and do not bind tightly with the de-icing components, so they cannot form a durable and dense protective layer on the metal surface. (4) Rough process: simple mechanical mixing leads to uneven product composition, easy agglomeration, and the components fail to establish an internal connection through the process, resulting in unstable performance. Therefore, it is necessary to provide a de-icing agent with better freezing point inhibition effect and performance at a lower temperature. Summary of the Invention

[0004] This application is made in view of the above-mentioned problems, and its purpose is to provide an organic de-icing agent, a method for preparing the same, and its application, wherein the de-icing agent has a better freezing point inhibition effect.

[0005] Specifically, the first aspect of this application provides an organic snow-melting agent, including lignin derivatives, polyamino acids, plant polyphenol extracts, disaccharides, organic acid salts, polyols, humus, mineral soil conditioners, and microbial agents.

[0006] Furthermore, the lignin derivative is modified sodium lignin sulfonate, the polyamino acid is hydrolyzed polyglutamic acid, and the plant polyphenol extract is sugarcane bagasse polyphenol extract. The disaccharide is trehalose, the organic acid salt is trisodium citrate, and the polyol is glycerol; The humic substance is potassium humate, and the mineral soil conditioner is silicon-calcium-potassium-magnesium ore powder.

[0007] Further, by weight, the snow melting agent comprises the following components: 18-22 parts modified sodium lignosulfonate, 10-12 parts hydrolyzed polyglutamic acid, 5-7 parts sugarcane bagasse polyphenol extract, 12-14 parts trehalose, 8-10 parts trisodium citrate, 5-6 parts glycerol, 12-14 parts potassium humate, 8-10 parts silicon-calcium-potassium-magnesium ore powder, 5-7 parts water-retaining agent, and 3-5 parts compound microbial agent.

[0008] A second aspect of this application provides a method for preparing an organic de-icing agent, comprising the following steps: S1. Modified sodium lignosulfonate and sugarcane bagasse polyphenol extract were subjected to enzymatic hydrolysis and activation treatment to obtain biomass enzymatic hydrolysis and activation solution; S2. Trehalose, trisodium citrate, and glycerol are subjected to eutectic melting treatment to obtain a eutectic melt; S3. The biomass enzymatic hydrolysis activation solution and the eutectic melt are subjected to high-speed shear mixing, and hydrolyzed polyglutamic acid, potassium humate, and silicon-calcium-potassium-magnesium ore powder are added to complete molecular self-assembly and form a composite colloid. S4. Add a water-retaining agent and a compound microbial agent to the composite colloid, and then granulate and dry it to obtain the ecological snow-melting agent.

[0009] Further, the enzymatic activation treatment in step S1 specifically involves: dispersing modified sodium lignin sulfonate and sugarcane bagasse polyphenol extract in water, adjusting the pH to 4.5-5.5, adding the compound enzyme preparation, reacting at 45-50℃ for 2-3 hours, and then raising the temperature to 80-85℃ for enzyme inactivation.

[0010] Furthermore, the compound enzyme preparation is a mixture of cellulase and xylanase, and its addition amount is 1.5%-2.5% of the total dry weight of modified sodium lignosulfonate and sugarcane bagasse polyphenol extract.

[0011] Furthermore, the eutectic melting process in step S2 specifically involves mixing and stirring trehalose, trisodium citrate, and glycerol at 60-65°C until a uniform and transparent melt is formed.

[0012] Further, the high-speed shear blending in step S3 specifically involves mixing the biomass enzymatic hydrolysis activation solution with the eutectic melt at a shearing speed of 1200-1500 rpm and continuously shearing for 15-25 minutes.

[0013] Furthermore, in step S4, the granulation and drying process involves spray drying with an inlet air temperature of 175-195℃ and an outlet air temperature of 75-85℃.

[0014] A third aspect of this application provides the application of the aforementioned organic de-icing agent in de-icing and snow removal on roads, bridges, or airport runways.

[0015] The present invention has the following beneficial effects: First, the organic de-icing agent provided in this application achieves synergistic effects among its carefully selected components and their proportions, significantly improving de-icing efficiency. The combination of modified sodium lignosulfonate and hydrolyzed polyglutamic acid not only enhances the adsorption performance of the de-icing agent but also promotes the rapid melting of ice crystals. The addition of sugarcane bagasse polyphenol extract and potassium humate further improves the environmental friendliness and soil-improving effects of the de-icing agent.

[0016] Secondly, this organic de-icing agent exhibits excellent freezing point inhibition. Even under extremely cold conditions, such as below -30 degrees Celsius, its de-icing efficiency remains stable, effectively solving the problem of poor performance of traditional de-icing agents in low-temperature environments. This is attributed to the eutectic melting treatment of components such as trehalose, trisodium citrate, and glycerol, which forms a eutectic melt with low freezing point characteristics.

[0017] Furthermore, the organic de-icing agent of this application exhibits excellent corrosion inhibition. By adding silica-calcium-potassium-magnesium ore powder and compound microbial agents, it not only forms a durable and dense protective layer on the metal surface, effectively preventing corrosion, but also promotes rapid road surface recovery and ecological restoration after snow melting.

[0018] Furthermore, this preparation method employs sophisticated processes, including enzymatic activation, eutectic melting, high-speed shear blending, granulation, and drying, ensuring the uniformity of product composition and the stability of its performance. This avoids problems such as uneven composition and agglomeration caused by traditional simple mechanical mixing.

[0019] Finally, the organic de-icing agent of this application has a wide range of applications in de-icing and snow melting on roads, bridges or airport runways, and has significant economic and social benefits. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following description and illustration are provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0021] Obviously, the following description is merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios without any inventive effort. Furthermore, it is understood that although the effort involved in such development may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0022] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0023] Unless otherwise specified, the term "or" is inclusive in this application. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0024] An embodiment of the first aspect of this application provides an organic snow-melting agent, comprising lignin derivatives, polyamino acids, plant polyphenol extracts, disaccharides, organic acid salts, polyols, humus, mineral soil conditioners, and microbial agents.

[0025] The lignin derivatives, polyamino acids, and plant polyphenol extracts are biomass crystallization inhibitors; disaccharides, organic acid salts, and polyols are bio-metabolic heat-generating components; and humus, mineral soil conditioners, and microbial agents are ecological restoration and functional enhancement components. These three components work synergistically, not only leveraging their individual advantages during snow melting but also enhancing overall performance through a combined effect. The biomass crystallization inhibitor effectively interferes with ice crystal formation and growth, inhibiting icing at its source; the bio-metabolic heat-generating components release heat during snow melting, accelerating the process; and the ecological restoration and functional enhancement components repair and strengthen the ecological environment around roads, bridges, or airport runways after snow melting, reducing the negative environmental impact of de-icing agents while enhancing road surface stability and durability. This multi-component synergistic design concept makes the organic de-icing agent of this application perform exceptionally well in snow and ice melting, and is also more environmentally friendly and sustainable.

[0026] Furthermore, the lignin derivative is modified sodium lignin sulfonate, the polyamino acid is hydrolyzed polyglutamic acid, and the plant polyphenol extract is sugarcane bagasse polyphenol extract. The disaccharide is trehalose, the organic acid salt is trisodium citrate, and the polyol is glycerol; The humic substance is potassium humate, and the mineral soil conditioner is silicon-calcium-potassium-magnesium ore powder.

[0027] The modification method for sodium lignin sulfonate is as follows: Dissolve one part (by mass) of sodium lignin sulfonate in 5-8 parts (by mass) of deionized water to prepare a solution with a concentration of 15-20%; under stirring, slowly add 0.3-0.5 parts (by mass) of aminosulfonic acid to the above solution; heat the mixture to 70-80℃ and react at this temperature for 2-3 hours to obtain a deeply sulfonated lignin solution. Cool the deeply sulfonated lignin solution to 60-65℃, and under continuous stirring and nitrogen protection, simultaneously add a mixed monomer solution and an initiator solution. The mixed monomer solution is a mixed aqueous solution of acrylic acid and acrylamide (total concentration 30%), and the amount used is 0.8-1.2 times the dry basis mass of lignin; the initiator solution is an aqueous solution of ammonium persulfate (concentration 5%), and the amount used is 3-5% of the total mass of the mixed monomers; control the dropping rate and complete the addition within 1.5-2 hours, and continue to maintain the reaction at this temperature for 1-2 hours to ensure complete reaction. After the reaction was complete, the product was cooled to room temperature. The pH was adjusted to 7-8 with sodium hydroxide solution to convert the grafted polyacrylic acid chains into sodium polyacrylate, further enhancing its water solubility and dispersion stability. The product solution was dried in a spray drying tower (inlet air temperature 180-200℃, outlet air temperature 80-90℃) to obtain a brown to dark black powdery final product—sulfonated-graft copolymerized modified sodium lignosulfonate.

[0028] This modified sodium lignosulfonate, with its newly added carboxyl and amide groups, significantly enhances its ability to compete with ice crystals for hydrogen bonds in water molecules, resulting in a synergistic effect. Hydrolyzed polyglutamic acid (γ-PGA) molecules, with their numerous carboxyl groups, can form interactions with water molecules stronger than water-water hydrogen bonds, effectively stealing water molecules and disrupting the hydrogen bond network of ice crystals. Together, these two substances efficiently inhibit ice crystal formation from both physical and chemical perspectives. Polyphenolic substances in sugarcane bagasse extract have a high affinity for specific crystal faces of ice crystals, selectively adsorbing onto the ice crystal surface, altering its growth habits, and preventing the formation of a hard ice layer, instead forming a loose, easily broken structure.

[0029] Trehalose is a stable disaccharide that can be slowly utilized by various environmental microorganisms to provide sustained and mild thermogenic effects. Trisodium citrate enters the tricarboxylic acid cycle rapidly, serving as a highly efficient and fast energy source that quickly initiates the thermogenic process. The combination of these two substances achieves a perfect balance between rapid initiation and sustained heat preservation during the melting process. Glycerol not only serves as a carbon source for microorganisms but also lowers the intracellular freezing point, enhancing microbial activity at low temperatures and ensuring the efficient operation of the biological thermogenic mechanism even in low-temperature environments.

[0030] Potassium humate and silica-calcium-potassium-magnesium ore powder provide potassium fertilizer while improving soil aggregate structure and alleviating soil compaction caused by other snow-melting agents. Water-retaining agents absorb melted snow water, reduce runoff, prolong the effect time, and provide moisture for microorganisms and plants. The compound microbial agent contains gelatinous Bacillus and brown spherical nitrogen-fixing bacteria, with an effective viable count ≥5 billion / gram; the added compound microbial agent can utilize metabolic components as nutrients, activate the soil, and convert the minerals in the snow-melting agent into a form that plants can absorb, fundamentally transforming the snow-melting process from an environmental burden to an ecological benefit.

[0031] Further, by weight, the de-icing agent comprises the following components: 18-22 parts modified sodium lignosulfonate, 10-12 parts hydrolyzed polyglutamic acid (γ-PGA), 5-7 parts sugarcane bagasse polyphenol extract, 12-14 parts trehalose, 8-10 parts trisodium citrate, 5-6 parts glycerol, 12-14 parts potassium humate, 8-10 parts silicon-calcium-potassium-magnesium ore powder, 5-7 parts water-retaining agent, and 3-5 parts compound microbial agent.

[0032] The modified sodium lignosulfonate can be used in any of the following proportions: 18, 20, or 22 parts by mass. A dosage below 18 parts weakens the biomass crystallization inhibition effect, making it difficult to effectively interfere with ice crystal formation; a dosage above 22 parts may lead to excessive viscosity of the de-icing agent, affecting its spreading and penetration performance in practical applications. The hydrolyzed polyglutamic acid (γ-PGA) should be selected in the range of 10, 11, or 12 parts by mass. A dosage below 10 parts results in insufficient synergy with the modified sodium lignosulfonate, reducing the ice crystal inhibition effect; a dosage above 12 parts may increase costs without significant performance improvement. Sugarcane bagasse polyphenol extract is preferably used in proportions of 5, 6, or 7 parts. Insufficient dosage fails to form an effective three-dimensional inhibition network, while excessive dosage may affect the overall solubility of the de-icing agent. Trehalose should be selected in proportions of 12, 13, or 14 parts. A dosage below this range results in insufficient sustained heat generation, while a dosage above this range may lead to excessive hygroscopicity of the de-icing agent. The optimal dosage of trisodium citrate is between 8, 9, and 10 parts. Insufficient dosage will result in poor rapid start-up heat generation, while excessive dosage may cause pH fluctuations in the system. Glycerin is best used at 5, 5.5, or 6 parts. Insufficient dosage will result in insignificant metabolic boosting, while excessive dosage may make the snow-melting agent too viscous. Potassium humate is best used at 12, 13, or 14 parts. Insufficient dosage will result in poor soil improvement, while excessive dosage may affect the snow-melting speed. Silicon-calcium-potassium-magnesium ore powder is best used at 8, 9, or 10 parts. Insufficient dosage will not effectively alleviate soil compaction, while excessive dosage may affect the freezing point inhibition effect of the snow-melting agent. The optimal dosage of water-retaining agent is between 5, 6, and 7 parts. Insufficient dosage will result in short moisture retention time, while excessive dosage may affect the drying speed of the snow-melting agent. The optimal dosage of compound microbial agent is 3, 4, or 5 parts. Insufficient dosage will result in poor ecological restoration, while excessive dosage may cause competitive inhibition between microorganisms.

[0033] An embodiment of the second aspect of this application provides a method for preparing an organic de-icing agent, comprising the following steps: S1. Modified sodium lignosulfonate and sugarcane bagasse polyphenol extract were subjected to enzymatic hydrolysis and activation treatment to obtain biomass enzymatic hydrolysis and activation solution; S2. Trehalose, trisodium citrate, and glycerol are subjected to eutectic melting treatment to obtain a eutectic melt; S3. The biomass enzymatic hydrolysis activation solution and the eutectic melt are subjected to high-speed shear mixing, and hydrolyzed polyglutamic acid, potassium humate, and silicon-calcium-potassium-magnesium ore powder are added to complete molecular self-assembly and form a composite colloid. S4. Add a water-retaining agent and a compound microbial agent to the composite colloid, and then granulate and dry it to obtain the ecological snow-melting agent.

[0034] In this embodiment, in step S1, 18-22 parts of modified sodium lignosulfonate and 5-7 parts of sugarcane bagasse polyphenol extract are added to a first reaction vessel equipped with temperature control and stirring. 25% (w / w) of purified water (temperature: 40-45℃) of the total feed amount is added, stirring is started at 150-200 rpm, and dispersion is carried out for 30 minutes until a uniform slurry is formed. The pH of the slurry is adjusted to 4.5-5.5 with dilute citric acid solution, and a compound enzyme preparation (cellulase:xylanase = 1:1) is added at 1.5%-2.5% of the total dry weight of the biomass. The stirring speed is maintained at 100-150 rpm, and the reaction is carried out at 45-50℃ for 2-3 hours, followed by enzyme inactivation at 80-85℃.

[0035] In this embodiment, in step S2, 12-14 parts of trehalose, 8-10 parts of trisodium citrate, and 5-6 parts of glycerol are added sequentially to a temperature-controlled and second reaction vessel. The temperature is slowly raised to 60-65°C and maintained for 40-50 minutes with gentle stirring at 50-80 rpm until all components melt into a homogeneous and transparent eutectic melt.

[0036] In this embodiment, in step S3, the biomass enzymatic hydrolysis activation solution is transferred to the reactor in step S2 and mixed with the eutectic melt. The stirring speed is drastically increased to 1200-1500 rpm (high-speed shear dispersion mode) and sheared continuously for 15-25 minutes. This process is crucial for molecular-level self-assembly. While maintaining shear at 1200-1500 rpm, 10-12 parts of hydrolyzed polyglutamic acid, 12-14 parts of potassium humate, and 8-10 parts of silicon-calcium-potassium-magnesium ore powder are added slowly in sequence, with an interval of 3-5 minutes between each material. After all materials are added, high-speed shearing continues for 20 minutes to form a homogeneous viscous composite colloid.

[0037] In this embodiment, in step S4, the composite colloid obtained in step S3 is cooled to 30-35°C using jacketed cooling water, and the stirring speed is reduced to 300-400 rpm. Then, 5-7 parts of water-retaining agent are added sequentially, and the mixture is stirred for 10 minutes to allow it to fully swell; 3-5 parts of composite bacterial agent are added, and the mixture is gently stirred for 5-8 minutes to ensure uniform dispersion of the bacteria and avoid excessive shearing that could damage them. The slurry is immediately pumped to a centrifugal spray drying tower via a diaphragm pump, with an inlet air temperature of 175-195°C, an outlet air temperature of 75-85°C, and an atomizer speed of 18000-20000 rpm.

[0038] Microspherical particles with a particle size range of 80-150 mesh were collected from the bottom of the drying tower.

[0039] A third aspect of this application provides the application of the aforementioned organic de-icing agent in de-icing and snow removal on roads, bridges, or airport runways.

[0040] Example The following examples describe the disclosure of this invention in more detail. These examples are merely illustrative, as various modifications and variations will be apparent to those skilled in the art within the scope of this disclosure. Unless otherwise stated, all parts, percentages, and ratios reported in the following examples are based on weight. Unless otherwise stated, all reagents used in the examples are available commercially or synthesized using conventional methods and are ready for use without further processing. Unless otherwise stated, all instruments used in the examples are available commercially.

[0041] Example 1 An organic de-icing agent, comprising the following components by weight: 18 parts modified sodium lignosulfonate, 10 parts hydrolyzed polyglutamic acid, 5 parts sugarcane bagasse polyphenol extract, 12 parts trehalose, 8 parts trisodium citrate, 5 parts glycerin, 12 parts potassium humate, 8 parts silicon-calcium-potassium-magnesium ore powder, 5 parts water-retaining agent, and 3 parts compound microbial agent.

[0042] The preparation method of organic de-icing agent includes the following steps: S1. In the first reaction vessel equipped with temperature control and stirring, add modified sodium lignosulfonate and sugarcane bagasse polyphenol extract, add 25% (w / w) of purified water (temperature 45℃) of the total feed amount, start stirring at 180 rpm, disperse for 30 minutes until a uniform slurry is formed; adjust the pH of the slurry to 5.0 with dilute citric acid solution, add compound enzyme preparation (cellulase: xylanase = 1:1), the amount added is 2% of the total dry weight of biomass; maintain stirring speed at 120 rpm, react at 48℃ for 2.5 hours, then raise the temperature to 80℃ for enzyme inactivation, to obtain biomass enzymatic hydrolysis activated solution; S2. In a temperature-controlled and second reaction vessel, trehalose, trisodium citrate, and glycerol are added sequentially. The temperature is slowly raised to 63°C and maintained at 65 rpm for 45 minutes with gentle stirring until all components melt into a eutectic melt. S3. The biomass enzymatic hydrolysis activation solution is transferred to the reaction vessel of step S2 and mixed with the eutectic melt; the stirring speed is rapidly increased to 1300 rpm (high-speed shear dispersion mode), and shearing is continued for 20 minutes. While maintaining shearing at 1300 rpm, hydrolyzed polyglutamic acid, potassium humate, and silicon-calcium-potassium-magnesium ore powder are added slowly in sequence, with an interval of 3 minutes between each material. After all materials are added, high-speed shearing is continued for 20 minutes to form a composite colloid. S4. Cool the obtained composite colloid to 30°C using jacketed cooling water, reduce the stirring speed to 320 rpm, add the water-retaining agent (highly absorbent resin, whose water absorption ratio can reach hundreds of times its own weight) sequentially, stir for 10 minutes to allow it to fully swell, then add the composite bacterial agent (composed of gelatinous Bacillus and brown spherical nitrogen-fixing bacteria in a 1:1 mass ratio, with an effective viable count ≥5 billion / gram), and gently stir for 6 minutes to ensure uniform dispersion of the bacteria and avoid excessive shearing damage to the bacteria; the slurry is immediately transported to a centrifugal spray drying tower through a diaphragm pump, with an inlet air temperature of 185°C, an outlet air temperature of 80°C, and an atomizer speed of 19000 rpm, and microspherical particles are collected from the bottom of the drying tower, with a particle size range of 80-150 mesh.

[0043] Example 2 This embodiment is basically the same as Embodiment 1, except that the snow melting agent includes the following components by weight: 20 parts modified sodium lignosulfonate, 11 parts hydrolyzed polyglutamic acid, 6 parts sugarcane bagasse polyphenol extract, 13 parts trehalose, 9 parts trisodium citrate, 5.5 parts glycerol, 13 parts potassium humate, 9 parts silicon-calcium-potassium-magnesium ore powder, 6 parts water-retaining agent, and 4 parts compound microbial agent.

[0044] Example 3 This embodiment is basically the same as Embodiment 1, except that the snow melting agent includes the following components by weight: 22 parts modified sodium lignosulfonate, 12 parts hydrolyzed polyglutamic acid, 7 parts sugarcane bagasse polyphenol extract, 14 parts trehalose, 10 parts trisodium citrate, 6 parts glycerol, 14 parts potassium humate, 10 parts silicon-calcium-potassium-magnesium ore powder, 7 parts water-retaining agent, and 5 parts compound microbial agent.

[0045] Example 4 This embodiment is basically the same as Embodiment 1, except that the snow melting agent includes the following components by weight: 19 parts modified sodium lignosulfonate, 10.5 parts hydrolyzed polyglutamic acid, 5.5 parts sugarcane bagasse polyphenol extract, 12.2 parts trehalose, 8.5 parts trisodium citrate, 5.2 parts glycerol, 12.5 parts potassium humate, 8.5 parts silicon-calcium-potassium-magnesium ore powder, 5.5 parts water-retaining agent, and 3.5 parts compound microbial agent.

[0046] Example 5 This embodiment is basically the same as Embodiment 1, except that the snow melting agent includes the following components by weight: 21 parts modified sodium lignosulfonate, 11.5 parts hydrolyzed polyglutamic acid, 6.5 parts sugarcane bagasse polyphenol extract, 13.5 parts trehalose, 9.5 parts trisodium citrate, 5.8 parts glycerol, 13.5 parts potassium humate, 9.5 parts silicon-calcium-potassium-magnesium ore powder, 6.5 parts water-retaining agent, and 4.5 parts compound microbial agent.

[0047] Comparative Example 1 It uses a traditional chloride-based de-icing agent, which is a mixture of 95 parts sodium chloride and 5 parts sodium nitrite.

[0048] Comparative Example 2 It uses a traditional organic de-icing agent, which is a mixture of 70 parts sodium formate and 30 parts urea.

[0049] Comparative Example 3 This comparative example is basically the same as Example 3, except that the preparation process only involves simple physical dry mixing, without special processes such as enzymatic hydrolysis, melting, or high-speed shearing.

[0050] Comparative Example 4 This comparative example is basically the same as Example 3, except that modified sodium lignin sulfonate, hydrolyzed polyglutamic acid and sugarcane bagasse polyphenol extract are removed, and trehalose and potassium humate are added in equal weight proportions.

[0051] Comparative Example 5 This comparative example is basically the same as Example 3, except that trehalose, trisodium citrate and glycerol are removed, and they are added in equal weight proportions to silicon-calcium-potassium-magnesium ore powder and water-retaining agent.

[0052] Experimental Case 1 Freezing point test: In accordance with the standard GB / T 23851-2017 Snow melting agent, a 30% (w / w) aqueous solution of snow melting agent was prepared, and its freezing point was determined by the step cooling curve method.

[0053] Corrosion rate test: Referring to the metal corrosion test method in GB / T 23851-2017, a Q235 carbon steel test piece (50mm×25mm×2mm) was immersed in a 30% de-icing agent solution and kept at a constant temperature of (20±2)℃ for 72 hours. The mass loss per unit area per unit time (g / m²) was calculated. 2 ·h).

[0054] Ice-melting capacity test: A uniform ice layer with a thickness of 25 mm was prepared in a petri dish (Φ90 mm) in a -20℃ low-temperature chamber. 5.0 g of de-icing agent sample was weighed and evenly spread on the ice surface. The time required for the ice layer to be completely penetrated and the state of the ice layer at this time were recorded.

[0055] The de-icing agents of Examples 1-5 and Comparative Examples 1-5 were used in the above tests, and the test results are shown in Table 1.

[0056]

[0057] Experimental Case 2 Ecotoxicity test (seed germination rate): A 10% de-icing agent extract was prepared according to the phytotoxicity test method. Plump wheat seeds, 50 seeds per group, were placed in petri dishes lined with filter paper, and 10 mL of the extract was added. The seeds were incubated at 25°C in the dark for 72 hours, and the germination rate was calculated. Deionized water was used as a blank control.

[0058] The de-icing agents of Examples 1-5 and Comparative Examples 1-5 were used as experimental groups in the above tests, and the test results are shown in Table 2.

[0059]

[0060] Experimental Case 3 Soil impact test: 100g of soil was mixed with 5g of de-icing agent and incubated for 28 days. Then, the soil pH, electrical conductivity (EC value, reflecting salinity) and urease activity (reflecting soil microbial activity) were measured.

[0061] The de-icing agents of Example 3 and Comparative Examples 1-5 were used as experimental groups in the above experiments, with blank soil as the control group. The experimental results are shown in Table 3.

[0062]

[0063] As can be seen from the above experimental cases, the freezing points of Examples 1-5 (-26.1℃ to -29.2℃) are significantly lower than those of Comparative Examples 1 and 2. This is mainly attributed to the synergistic effect of the biomass crystallization inhibition module. The steric hindrance effect of modified sodium lignin sulfonate, the hydrogen bond competition of hydrolyzed polyglutamic acid, and the crystal face adsorption of sugarcane bagasse polyphenols collectively and significantly interfere with the orderly arrangement of water molecules at the molecular level, allowing the solution to form ice crystals at a lower temperature. At the same time, the bio-metabolic heat production module continuously provides heat inside the ice layer, creating a pincer attack from both inside and outside, thus the melting time (138-165s) is much shorter than that of all comparative examples.

[0064] Comparative Example 3 outperformed traditional products (Comparative Examples 1 and 2) in all aspects, but was significantly inferior to Example 3, which used the same components. This demonstrates that the preparation process of this invention (enzymatic activation, eutectic melting, and high-speed shear self-assembly) is crucial for achieving molecular-level synergy among components. Simple physical mixing cannot allow the components to form an effective interaction network, resulting in a significant performance reduction. Comparative Example 4 had the highest freezing point (-15.3℃) and the worst ice-melting effect, fully demonstrating that the crystallization inhibition module is the core and foundation for achieving the ultra-low freezing point and rapid ice-melting of this invention. Without it, the freezing point reduction capability of the remaining components alone is very limited. Comparative Example 5 had a acceptable freezing point (-25.1℃), thanks to the complete crystallization inhibition module, but its ice-melting time (195s) was longer than all examples, and it showed weakness in the later stages. This indicates that the metabolic heat generation module is key to providing continuous ice-melting power and ensuring complete melting of the ice layer at low temperatures. Without a continuous supply of biological heat, the ice-melting process would stagnate due to the decrease in system temperature.

[0065] The corrosion rates of Examples 1-5 (0.017-0.021) are extremely low because chloride ions, the primary culprit of corrosion, are fundamentally eliminated. The product has a near-neutral pH and contains potassium humate and silicates, which have a mild passivating effect on metals. Wheat germination experiments and soil cultivation experiments provide the strongest evidence. The germination rates of Examples 1-5 are comparable to those of water, and they significantly increase soil urease activity. This indicates that the product of this invention is not only non-toxic but also introduces beneficial microorganisms and nutrients, activating and nourishing the soil ecosystem. In contrast, Comparative Examples 1 and 2 are devastating to seed germination and soil ecology.

[0066] The ice layer treated by this invention exhibits a "loose, flocculent" or "snowflake-like" appearance, which is a direct macroscopic manifestation of the effectiveness of the crystallization inhibition mechanism. The crystal structure of the ice is disintegrated from the inside, making it unable to form a hard whole, thus losing its adhesion and becoming easy to remove. This achieves a transformation from "ice melting" to "ice suppression." None of the comparative examples could lead to this fundamental change in the ice layer structure; they either formed hard pits (Comparative Example 1), or only underwent physical melting (Comparative Examples 2 and 5), or produced cracks but still required external force to break (Comparative Example 3). This demonstrates the uniqueness and superiority of the technical path of this invention from a physical morphological perspective.

[0067] Through a thorough comparison of the above embodiments and comparative examples, it is demonstrated that the ecological snow melting agent and its preparation method provided by the present invention have produced unexpected technical effects that far exceed those of the prior art in terms of ice melting efficiency, low corrosivity and environmental friendliness.

[0068] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. An organic de-icing agent, characterized in that, It includes lignin derivatives, polyamino acids, plant polyphenol extracts, disaccharides, organic acid salts, polyols, humus, mineral soil conditioners, and microbial agents.

2. The organic de-icing agent according to claim 1, characterized in that, The lignin derivative is modified sodium lignin sulfonate, and / or the polyamino acid is hydrolyzed polyglutamic acid, and / or the plant polyphenol extract is sugarcane bagasse polyphenol extract; and / or The disaccharide is trehalose, and / or the organic acid salt is trisodium citrate, and / or the polyol is glycerol; The humic substance is potassium humate, and / or the mineral soil conditioner is silicon-calcium-potassium-magnesium ore powder.

3. The organic de-icing agent according to claim 2, characterized in that, The de-icing agent comprises the following components by weight: 18-22 parts modified sodium lignosulfonate, 10-12 parts hydrolyzed polyglutamic acid, 5-7 parts sugarcane bagasse polyphenol extract, 12-14 parts trehalose, 8-10 parts trisodium citrate, 5-6 parts glycerol, 12-14 parts potassium humate, 8-10 parts silicon-calcium-potassium-magnesium ore powder, 5-7 parts water-retaining agent, and 3-5 parts compound microbial agent.

4. A method for preparing an organic de-icing agent, characterized in that, The preparation of the organic de-icing agent according to any one of claims 1-3 comprises the following steps: S1. Modified sodium lignosulfonate and sugarcane bagasse polyphenol extract were subjected to enzymatic hydrolysis and activation treatment to obtain biomass enzymatic hydrolysis and activation solution; S2. Trehalose, trisodium citrate, and glycerol are subjected to eutectic melting treatment to obtain a eutectic melt; S3. The biomass enzymatic hydrolysis activation solution and the eutectic melt are subjected to high-speed shear mixing, and hydrolyzed polyglutamic acid, potassium humate, and silicon-calcium-potassium-magnesium ore powder are added to complete molecular self-assembly and form a composite colloid. S4. Add a water-retaining agent and a compound microbial agent to the composite colloid, and then granulate and dry it to obtain the ecological snow-melting agent.

5. The method for preparing the organic de-icing agent according to claim 4, characterized in that, The enzymatic activation treatment in step S1 specifically involves dispersing modified sodium lignin sulfonate and sugarcane bagasse polyphenol extract in water, adjusting the pH to 4.5-5.5, adding a compound enzyme preparation, reacting at 45-50℃ for 2-3 hours, and then raising the temperature to 80-85℃ for enzyme inactivation.

6. The method for preparing the organic de-icing agent according to claim 5, characterized in that, The compound enzyme preparation is a mixture of cellulase and xylanase, and its addition amount is 1.5%-2.5% of the total dry weight of modified sodium lignin sulfonate and sugarcane bagasse polyphenol extract.

7. The method for preparing the organic de-icing agent according to claim 4, characterized in that, The eutectic melting process in step S2 is as follows: trehalose, trisodium citrate, and glycerol are mixed and stirred at 60-65°C until a uniform and transparent melt is formed.

8. The method for preparing the organic de-icing agent according to claim 4, characterized in that, The high-speed shearing blending in step S3 specifically involves mixing the biomass enzymatic hydrolysis activation solution with the eutectic melt at a shearing speed of 1200-1500 rpm and continuously shearing for 15-25 minutes.

9. The method for preparing the organic de-icing agent according to claim 4, characterized in that, In step S4, the granulation and drying process involves spray drying with an inlet air temperature of 175-195℃ and an outlet air temperature of 75-85℃.

10. The application of an organic de-icing agent as described in any one of claims 1-3 in de-icing and snow removal on roads, bridges, or airport runways.

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