Ecological-friendly composite environment-friendly snow-melting agent and preparation method thereof

Abstract

The invention discloses an eco-friendly composite environment-friendly snow-melting agent which is prepared from the following components in parts by weight: 30-50 parts of a snow-melting deicing agent, 2-10 parts of a corrosion inhibitor, 2-10 parts of a plant growth nutrient and 40-60 parts of water, the snow melting and deicing agent is composed of alcohols, organic acid salts and saccharides. The snow-melting agent disclosed by the invention not only can efficiently melt snow, but also does not contain strong acid radical ions in a solution after snow melting, has low corrosivity on infrastructures such as metal and concrete, has small influence on plants and soil, and is beneficial to sustainable development of an ecological environment. The invention also discloses a preparation method of the eco-friendly composite environment-friendly snow-melting agent, which comprises the following specific steps: weighing the components in proportion, adding the snow-melting and deicing agent, the corrosion inhibitor and the plant growth nutritional agent into water, uniformly stirring, and discharging to obtain the environment-friendly snow-melting agent. The preparation method is simple and convenient in steps, efficient in production process and suitable for large-scale industrial production.

Description

Technical Field

[0001] This invention relates to a snow melting agent, and more particularly to an eco-friendly composite environmentally friendly snow melting agent and its preparation method. Background Technology

[0002] Winter snowfall significantly impacts road traffic and urban life. Snow-covered roads not only obstruct traffic but also increase the frequency of traffic accidents, leading to highway closures and airport shutdowns. Spraying de-icing agents can effectively and promptly remove snow from roads, preventing traffic accidents and economic losses. Currently, the most commonly used de-icing agents are chloride-based, primarily sodium chloride, calcium chloride, and magnesium chloride. Chloride-based de-icing agents contain large amounts of chloride ions, which not only have a strong corrosive effect on infrastructure materials such as roads and bridges but also negatively impact surrounding vegetation, soil, and water bodies, leading to ecological degradation. Furthermore, the widespread use of chloride-based de-icing agents may increase the salinity of groundwater and surface water, further disrupting the balance of the ecosystem.

[0003] With increasing societal focus on environmental protection and sustainable development, the development of eco-friendly, low-corrosion, environmentally friendly non-chlorine de-icing agents has become an urgent need. Summary of the Invention

[0004] The present invention addresses the aforementioned technical problems of existing chloride-based de-icing agents by providing an eco-friendly composite de-icing agent that is highly efficient at melting snow, has low corrosiveness, and minimal impact on plants and soil.

[0005] This invention also provides a method for preparing an eco-friendly composite environmentally friendly snow melting agent.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An eco-friendly composite environmentally friendly snow melting agent of the present invention is composed of the following components in parts by weight: 30-50 parts snow melting and de-icing agent, 2-10 parts corrosion inhibitor, 2-10 parts plant growth nutrient, and 40-60 parts water; the snow melting and de-icing agent is composed of alcohols, organic acid salts and sugars. The snow-melting and de-icing agent of this invention is composed of alcohols, organic acid salts, and sugars. It utilizes multiple mechanisms among these three components to achieve efficient snow melting and de-icing effects. Alcohols lower the freezing point and disrupt the ice crystal structure; organic acid salts further lower the freezing point and disrupt ice crystals through exothermic dissolution and ion-dipole interactions; sugars lower the freezing point, disrupt the ice crystal structure, and increase the viscosity and permeability of the solution, extending the action time of the snow-melting agent. Sugars are also rich in nutrients, promote plant growth, and have good biodegradability, making them environmentally friendly. The combination of alcohols, organic acid salts, and sugars achieves efficient snow melting and de-icing effects. Corrosion inhibitors form a protective layer on infrastructure surfaces, significantly reducing corrosion to metals and concrete. Plant growth nutrients not only efficiently melt snow but also provide key nutrients needed for plant growth. These nutrients not only do not burden the environment but also nourish surrounding vegetation after snow melting, promoting lawn and plant growth and maintaining ecosystem balance. This invention optimizes the formulation of snow-melting agents. By scientifically combining multiple effective ingredients, it can not only melt snow efficiently, but also leaves no strong acid ions in the melted solution. It has low corrosivity to infrastructure such as metals and concrete, and has little impact on plants and soil, which is conducive to the sustainable development of the ecological environment.

[0007] Preferably, the organic acid salt is one or more of sodium formate, potassium formate, sodium acetate, magnesium acetate, calcium acetate, and sodium propionate.

[0008] Preferably, the alcohol is one or more of ethylene glycol, propylene glycol, and glycerol.

[0009] Preferably, the sugar is one or more of cane molasses, beet molasses, and corn molasses.

[0010] Preferably, the corrosion inhibitor is one or more of the following: amino acids, sodium molybdate, sodium tungstate, thiourea, sodium polyphosphate, and sodium gluconate.

[0011] Preferably, the plant growth nutrient is at least two of the following: diammonium hydrogen phosphate, dipotassium hydrogen phosphate, diammonium hydrogen citrate, urea, potassium sulfate, potassium humate, sorbitol, amino acid ester, and sodium nitrophenolate.

[0012] An eco-friendly composite environmentally friendly snow-melting agent preparation method comprises the following steps: weighing each component according to the specified proportions, adding the snow-melting and de-icing agent, corrosion inhibitor, and plant growth nutrient to water, stirring evenly, and discharging the material to obtain the environmentally friendly snow-melting agent. The snow-melting agent preparation method of this invention is simple in steps, highly efficient in production, suitable for large-scale industrial production, requires no complex equipment or process conditions, has low production costs, and is conducive to widespread application.

[0013] Therefore, the present invention has the following beneficial effects: (1) The formula of the snow melting agent has been optimized. By scientifically combining multiple effective ingredients, it can not only melt snow efficiently, but also does not contain strong acid radical ions in the solution after snow melting. It has low corrosivity to infrastructure such as metals and concrete, and has little impact on plants and soil, which is conducive to the sustainable development of the ecological environment. (2) The preparation method of the de-icing agent of the present invention is simple and efficient, suitable for large-scale industrial production. The preparation process does not require complex equipment and process conditions, and the production cost is low, which is conducive to its promotion and application. Detailed Implementation

[0014] The present invention will be further described below through specific embodiments.

[0015] Example 1 Add 40 kg of water to a mixing tank, then add 50 kg of snow-melting and de-icing agent, 5 kg of corrosion inhibitor, and 5 kg of plant growth nutrient solution in sequence. Stir at room temperature for 180 minutes, then discharge to obtain an environmentally friendly snow-melting agent. The snow-melting and de-icing agent is composed of ethylene glycol, sodium acetate, and corn molasses in a mass ratio of 3:1:0.5; the corrosion inhibitor is composed of sodium tungstate and thiourea in a mass ratio of 1:1; and the plant growth nutrient solution is composed of urea, diammonium hydrogen phosphate, and potassium sulfate in a mass ratio of 5:1:0.5.

[0016] Example 2 Add 50 kg of water to a mixing tank, then add 40 kg of snow-melting and de-icing agent, 5 kg of corrosion inhibitor, and 5 kg of plant growth nutrient solution in sequence. Stir at room temperature for 180 minutes, then discharge to obtain an environmentally friendly snow-melting agent. The snow-melting and de-icing agent is composed of calcium acetate, magnesium acetate, propylene glycol, and sucrose molasses in a mass ratio of 1:1:0.5:0.1; the corrosion inhibitor is composed of sodium tungstate, thiourea, and sodium polyphosphate in a mass ratio of 1:1:2; and the plant growth nutrient solution is composed of sorbitol, diammonium hydrogen citrate, potassium humate, urea, and sodium nitrophenolate in a mass ratio of 1:1:1:1:0.01.

[0017] Example 3 Add 50 kg of water to a mixing tank, then add 40 kg of snow-melting and de-icing agent, 5 kg of corrosion inhibitor, and 5 kg of nutrient solution in sequence. Stir at room temperature for 180 minutes, then discharge to obtain an environmentally friendly snow-melting agent. The snow-melting and de-icing agent is composed of sodium formate, potassium formate, glycerol, and beet molasses in a mass ratio of 2:1:2:0.1; the corrosion inhibitor is composed of sodium molybdate, thiourea, and sodium gluconate in a weight ratio of 1:1:1; and the nutrient solution is composed of sorbitol, diammonium hydrogen citrate, dipotassium hydrogen phosphate, and urea in a mass ratio of 1:1:1:1.

[0018] I. Snow Melting Capacity Test (1) Preparation of ice cubes: Take a 50 ml beaker with the same diameter and height, add 15.00 mL of water, and place it in a low temperature constant temperature box at -10 ℃±1℃ for more than 3 hours to prepare ice cubes for later use.

[0019] (2) Determination of the snow-melting and ice-melting ability of de-icing agents Add 25 ml of the environmentally friendly de-icing agent obtained in Examples 1-3 and 29% calcium chloride solution to 50 ml beakers (both 50 ml in diameter and 50 ml in height). Place the environmentally friendly de-icing agent and 29% calcium chloride solution obtained in Examples 1-3 in a low-temperature constant temperature chamber at the same temperature for 3 hours, then set aside. The freezer temperature is controlled at -15℃ and -25℃ respectively. Remove the beaker containing ice from the low-temperature constant temperature chamber, wipe off the water and ice on the outer wall, and weigh it quickly at room temperature, accurate to 0.1 g. Remove the environmentally friendly de-icing agent and 29% calcium chloride solution, and quickly pour them into the beakers containing ice. Then return them to the low-temperature constant temperature chamber. After 0.5 hours, remove the beaker, immediately pour out the liquid, and quickly weigh the beaker and the remaining ice at room temperature. The more water that comes out, the stronger the de-icing ability.

[0020] (3) Snow melting capacity (w) calculation w = (m0 - m1) / (m′0 - m′1) × 100%, where in the formula... m0 is the numerical value of the mass of the beaker and ice without the addition of the environmentally friendly de-icing agent obtained in Examples 1-3, in grams (g). m1 is the mass of the beaker and remaining ice after the environmentally friendly de-icing agent and melted ice obtained in Examples 1-3 have been poured out, in grams (g). m0′ is the numerical value of the mass of the beaker and ice without the addition of 29% calcium chloride solution, in grams (g). m1′ is the value of the beaker and remaining ice after pouring out the 29% calcium chloride solution and melted ice, in grams (g).

[0021] The results of the snow melting capacity test of the snow melting agent are shown in Table 1 and Table 2.

[0022] Table 1. Relative ice-melting capacity data at -15℃

[0023]

[0024] Table 2. Relative ice-melting capacity data at -25℃

[0025]

[0026] As can be seen from Tables 1 and 2, the snow melting ability of the environmentally friendly snow melting agents prepared in Examples 1, 2 and 3 is significantly better than that of calcium chloride.

[0027] II. Carbon steel corrosion rate test Corrosion tests on metallic carbon steel were conducted according to the rotating plate method of GB / T 18175-2014. All carbon steel used were No. 20 metallic carbon steel plates (GB / T 699), with dimensions of 5mm × 2.5mm × 0.2mm, a central hole, and a surface area of ​​30mm². The carbon steel plates of constant weight were immersed in the environmentally friendly de-icing agent prepared in Examples 1-3, with a solution volume to sample area ratio of 25mL / cm². 2 The test temperature was 40℃, and no air was introduced during the test. After 48 hours, the rust on the surface of the sample was wiped off, and then the sample was acid-washed, alkali-washed, and washed with pure water. After removing excess water with anhydrous ethanol, it was dried and weighed. Another blank metal carbon steel sheet was not subjected to de-icing agent corrosion treatment. After acid-washing, alkali-washing, and pure water washing, it was dried with anhydrous ethanol and weighed. The corrosion rate is determined based on the corrosion loss, and the formula for calculating the corrosion rate v (mm / a) is as follows: v = 8760 × (m - m0) × 10 / (s × ρ × t), where: m is the mass loss of the sample, g; m0 is the mass loss of the blank carbon steel sheet without de-icing agent corrosion treatment after corresponding acid washing, alkali washing, and pure water washing, g; s is the surface area of ​​the sample, cm². 2 ρ is the density of the sample, in g / cm³. 3 ; t is the experimental time, h; 8760 is the number of hours equivalent to one year, h / a; 10 is the number of millimeters equivalent to 1 cm, mm / cm.

[0028] The corrosion rate test results of carbon steel are shown in Table 3.

[0029] Table 3. Test results of carbon steel corrosion rate

[0030]

[0031] As can be seen from Table 3, the corrosion rate of carbon steel prepared by the environmentally friendly de-icing agents in Examples 1-3 all meet the requirement of ≤0.11 (mm / a) for carbon steel corrosion rate in GB / T 23851-2017 "De-icing Agents".

[0032] III. Relative damage rate of plant seeds Referring to the method for determining the relative damage rate of plant seeds in the national standard GB / T 23851-2017 "Snow Melting Agents", Kentucky bluegrass was selected as the experimental seeds, with 100 seeds per group. They were placed in a light incubator at (24 ± 1) ℃ and their germination was observed for 12 days. The environmentally friendly snow melting agent in Examples 1-3 was diluted at 1+69, and distilled water was used as a control. The experiment was repeated 4 times, and the average germination rate F was taken to calculate the relative damage rate (S): S (%) = (F0 - F1) / F0, where F0 is the average germination rate of the control test seeds; F1 represents the average germination rate of seeds treated with the de-icing agent solution. The results of the relative damage rate of plant seeds are shown in Table 4.

[0033] Table 4 Results of the relative damage rate test of plant seeds

[0034]

[0035] As can be seen from Table 4, the relative damage rate of seeds prepared by the environmentally friendly de-icing agents in Examples 1-3 all meet the requirement of ≤50% for relative damage rate of seeds in GB / T 23851-2017 "De-icing Agents".

[0036] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. An eco-friendly, composite, environment-friendly snow-melting agent, characterized in that, The snow-melting and ice-melting agent is composed of 30-50 parts by weight of alcohol, organic acid salt and sugar.

2. An eco-friendly, complex, environment-friendly de-icing agent according to claim 1, characterized in that, The organic acid salt is one or more of sodium formate, potassium formate, sodium acetate, magnesium acetate, calcium acetate and sodium propionate.

3. An eco-friendly, complex, environment-friendly de-icing agent according to claim 1, characterized in that, The alcohol is one or more of ethylene glycol, propylene glycol and glycerol.

4. The eco-friendly, complex, environment-friendly snow melting agent according to claim 1, wherein the calcium salt is calcium chloride. The sugar is one or more of sugarcane molasses, sugar beet molasses and corn molasses.

5. The eco-friendly, complex, environment-friendly de-icing agent according to claim 1, wherein the de-icing agent is a mixture of sodium chloride, potassium chloride, magnesium chloride, calcium chloride, and sodium formate. The corrosion inhibitor is one or more of amino acid, sodium molybdate, sodium tungstate, thiourea, sodium polyphosphate and sodium gluconate.

6. An eco-friendly, complex, environment-friendly de-icing agent according to claim 1, characterized in that, The plant growth nutrient agent is at least two of diammonium hydrogen phosphate, dipotassium hydrogen phosphate, diammonium hydrogen citrate, urea, potassium sulfate, potassium humate, sorbitol, fresh amine fat and sodium complex nitrophenol.

7. The method of claim 1, wherein the method is characterized by: The specific steps are as follows: after weighing each component according to the proportion, the snow-melting and ice-melting agent, the corrosion inhibitor and the plant growth nutrient agent are added into water, stirred uniformly, discharged and the environment-friendly snow-melting agent is obtained.

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