Environment-friendly snow-melting agent and preparation method thereof

Abstract

The invention provides an environment-friendly snow-melting agent and a preparation method thereof, and the snow-melting agent is mainly prepared from the following raw materials in parts by mass: 100-200 parts of natural zeolite, 1500-1600 parts of ammonium sulfate, 100-150 parts of a corrosion inhibitor, 200-300 parts of garden waste, 100-150 parts of corncob particles, 100-200 parts of coal gangue, 1-5 parts of pulverized coal, 1-4 parts of polyacrylamide, 1-3 parts of concentrated sulfuric acid and 1000-2000 parts of water. According to the snow-melting agent, ammonium sulfate is used as a main snow-melting substance, a solvent in a pore channel in zeolite is increased in a mode of modifying natural zeolite through ammonium sulfate, the adsorption capacity and the loading capacity of snow-melting components are improved, the snow-melting capacity is improved by combining ammonium sulfate, and meanwhile harm caused by chloride can be avoided; therefore, the environment-friendly snow-melting agent is prepared.

Description

Technical Field

[0001] The invention relates to the technical field of three wastes treatment and comprehensive utilization, and in particular to an environmentally friendly snow-melting agent and a preparation method thereof. Background Art

[0002] The main components of deicing agents in the prior art are chloride type, non-chloride type and mixed type. Chloride type deicing agents are mainly sodium chloride, calcium chloride and magnesium chloride, non-chloride type deicing agents contain calcium acetate, magnesium acetate, potassium acetate or organic compounds with alcohols, amines and the like as active ingredients, and mixed deicing agents are generally made by mixing chloride type and non-chloride type deicing agents in a certain proportion. Compared with the other two types of deicing agents, chloride type deicing agents have the advantages of low freezing point, low price and good rapidity, so they are widely used in urban road snow removal, accounting for more than 90%, among which NaCl is the most widely used. However, due to the addition of salt solutes to ice and snow, the freezing point is lowered. Therefore, the process of using deicing agents to remove snow is a physical change, not a chemical reaction, and no other new substances will be produced. Taking NaCl as an example, the freezing point of a NaCl solution with a concentration of about 35% is -19°C. As long as the temperature is higher than this freezing point, the snow will melt into water. After the deicing agent melts, it moves into the soil with the water and can remain in the soil for a long time, causing great soil environmental pollution. In addition, Na+ and Cl- have high soil solubility and are easy to accumulate in the soil, which leads to changes in the physical and chemical properties of the soil, causing the ion concentration in the soil water to increase, the water potential of the plant root cells is lower than the water potential of the external solution, and the water seeps out, causing the cells to lose water, and at the same time affecting the plant's absorption of nutrients and mineral elements. In addition, if the external air humidity is low at this time, under the stimulation of transpiration on the water demand, the plant body loses water more seriously, which is very likely to cause physiological drought and even cause plant death. Therefore, how to achieve a deicing agent with high snow melting ability and environmental friendliness is the key to the current design of deicing agents.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] The first purpose of the present invention is to provide an environmentally friendly de-icing agent, which uses ammonium sulfate as the main de-icing substance, and modifies natural zeolite with ammonium sulfate to increase the internal pore solvent of the zeolite, thereby improving the adsorption capacity and loading capacity of de-icing components. While combining ammonium sulfate to improve the de-icing capacity, it can also avoid the harm caused by the use of chlorides.

[0005] The second purpose of the present invention is to provide a method for preparing an environmentally friendly snow-melting agent. The preparation method uses ammonium sulfate solution to modify natural zeolite so that the non-structural material in its internal pores is expanded, thereby increasing the pore volume of the zeolite and reducing the pore resistance, so that the zeolite has better adsorption capacity and loading capacity, and works together with other snow-melting components to achieve excellent snow-melting ability while causing less environmental pollution.

[0006] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted: The invention provides an environment-friendly snow-melting agent, which is mainly prepared from the following raw materials in parts by mass: 100-200 parts of natural zeolite, 1500-1600 parts of ammonium sulfate, 100-150 parts of corrosion inhibitor, 200-300 parts of garden waste, 100-150 parts of corn cob particles, 100-200 parts of coal gangue, 1-5 parts of coal powder, 1-4 parts of polyacrylamide, 1-3 parts of concentrated sulfuric acid and 1000-2000 parts of water.

[0007] Preferably, as a further specific embodiment, 120-180 parts of natural zeolite, 1510-1560 parts of ammonium sulfate, 110-140 parts of corrosion inhibitor, 220-250 parts of garden waste, 110-140 parts of corn cob particles, 110-180 parts of coal gangue, 3-4 parts of coal powder, 2-3 parts of polyacrylamide, 1-2 parts of concentrated sulfuric acid and 1200-1800 parts of water.

[0008] Preferably, as a further specific embodiment, 150 parts of natural zeolite, 1550 parts of ammonium sulfate, 120 parts of corrosion inhibitor, 250 parts of garden waste, 130 parts of corn cob particles, 150 parts of coal gangue, 3 parts of coal powder, 2 parts of polyacrylamide, 1 part of concentrated sulfuric acid and 1500 parts of water.

[0009] In the present invention, an environmentally friendly snow-melting agent is prepared by using ammonium sulfate as the main component of the snow-melting agent, combining garden waste and natural zeolite. It has excellent snow-melting effect and can avoid using chloride to pollute the environment. Compared with traditional chloride snow-melting agents, the snow-melting agent prepared by using ammonium sulfate as the main snow-melting substance has a better snow-melting effect. This is because the scenes where the snow-melting agent is used are often at a lower temperature, and ammonium sulfate is more suitable for lower temperature and dry snow environments than traditional chloride snow-melting agents. Therefore, the snow-melting agent prepared by using ammonium sulfate as the main raw material can still effectively melt dry snow at a lower temperature and can be used in extremely cold environments. Compared with sodium chloride, ammonium sulfate has a very small impact on the environment and is not easy to cause soil compaction and plant damage. Therefore, using ammonium sulfate as the main snow-melting substance is more advantageous than traditional chlorides. In order to solve the problem of ammonium sulfate in low temperature conditions The problem of low solubility under the condition of low solubility affecting its snow-melting effect is solved. The present invention uses a combination of natural zeolite and coal powder, utilizes the characteristic of natural zeolite releasing heat when absorbing water, and combines coal powder as a coloring agent. Through the action of coal powder, more heat is absorbed, thereby increasing the solubility of ammonium sulfate, so that the prepared snow-melting agent has a better snow-melting effect. Since zeolite can absorb harmful chemicals in the snow-melting agent, it can prevent the snow-melting agent from polluting nearby soil and water sources. Zeolite has high adsorption capacity and can absorb excess water to form a high traction surface, thereby accelerating the melting of ice and snow. Therefore, for the present invention, ammonium sulfate is used as the main snow-melting substance, combined with natural zeolite and coal powder to prepare an environmentally friendly snow-melting agent, wherein the addition of natural zeolite and coal powder can greatly improve the snow-melting ability of ammonium sulfate, and by adding natural zeolite, it is utilized to adsorb harmful substances, so that the prepared snow-melting agent can further reduce pollution to the environment. The present invention also adds natural ingredients corncobs, garden waste and corrosion inhibitors, and the sugar contained in the corncobs absorbs more water and improves the friction of the road surface, thereby improving the snow melting ability of the snow melting agent. The corncobs, as natural ingredients, can make the prepared snow melting agent more environmentally friendly, and the corncobs form a protective layer on the road surface, which synergistically acts with the corrosion inhibitor to prevent the road surface from being damaged and extend the service life of the road surface. In the present invention, natural garden waste, coal gangue and polyacrylamide are used as the forming agent of the snow melting agent, so as to further improve the environmental friendliness of the snow melting agent.

[0010] Preferably, as a further specific embodiment, the corrosion inhibitor is one or more of sodium hexametaphosphate, sodium gluconate, sodium citrate, sodium dihydrogen phosphate, glucose, maltose, sucrose, sodium silicate, aspartic acid and thiourea.

[0011] Preferably, as a further specific embodiment, the corrosion inhibitor is one or more of sodium gluconate, sodium citrate, sodium dihydrogen phosphate, glucose, thiourea and aspartic acid.

[0012] Preferably, as a further specific embodiment, the corrosion inhibitor is a mixture of sodium gluconate and sodium dihydrogen phosphate; Preferably, the mass ratio of sodium gluconate to sodium dihydrogen phosphate is (1-2): (1-1.5).

[0013] Preferably, as a further specific embodiment, the mass ratio of sodium gluconate to sodium dihydrogen phosphate is 1.5:1.

[0014] It can be known in the present invention that the selection of corrosion inhibitor is very important for the present invention. This is because ammonium sulfate has a certain corrosiveness to metals. During the use of ammonium sulfate, it can corrode metals and other materials faster and more widely, and ammonium sulfate itself can react with many metals to cause metal corrosion. Therefore, in order to avoid ammonium sulfate from corroding metals and thus affecting the life of the road surface, the present invention uses a corrosion inhibitor and combines corn cob particles to reduce the corrosion of the snow-melting agent to the road surface while having excellent snow-melting ability. Therefore, the present invention selects one or more of sodium hexametaphosphate, sodium gluconate, sodium citrate, sodium dihydrogen phosphate, glucose, maltose, sucrose, sodium silicate, aspartic acid and thiourea as corrosion inhibitors. Preferably, the corrosion inhibitor is one or more of sodium gluconate, sodium citrate, sodium dihydrogen phosphate, glucose, thiourea and aspartic acid. More preferably, when the corrosion inhibitor is a mixture of sodium gluconate, sodium dihydrogen phosphate and thiourea, the snow-melting agent prepared thereby has excellent snow-melting effect and can also better The life of the road surface is extended, wherein sodium gluconate itself, as a non-corrosive raw material, can interact well with snow and ice to form hydrated ions, so that the amount of heat required for cooling is increased, thereby further reducing the melting point of ice, thereby accelerating the melting of ice, and the sodium gluconate molecule has a strong hydrophilicity, and can well adsorb surrounding water molecules, thereby further accelerating the melting of snow and ice, and the combination of sodium gluconate and sodium dihydrogen phosphate can further reduce the melting point of ice, thereby accelerating snow melting, and can further reduce the corrosion of substances in the snow melting agent to metals; and the mass ratio between sodium gluconate and sodium dihydrogen phosphate is also very important for the present invention. When the mass ratio of sodium gluconate and sodium dihydrogen phosphate is (1-2): (1-1.5), preferably when the mass ratio of sodium gluconate and sodium dihydrogen phosphate is 1.5:1, the snow melting agent prepared has excellent effect, because the mixture of sodium gluconate and sodium dihydrogen phosphate can further reduce the melting point of ice and further extend the service life of the road surface.

[0015] The present invention also provides a method for preparing the above-mentioned environmentally friendly snow-melting agent, comprising the following steps: ammonium sulfate and water are prepared into an ammonium sulfate solution; Add concentrated sulfuric acid to the ammonium sulfate solution to adjust the pH, then completely immerse the natural zeolite in the solution, stir, filter, and dry to obtain the modified zeolite; The garden waste, corn cob particles and coal gangue are crushed and mixed respectively and then uniformly obtained to obtain biomass; Ammonium sulfate, biomass, modified zeolite, coal powder, corrosion inhibitor and polyacrylamide are added in sequence, stirred evenly and then pressed to obtain the product.

[0016] Preferably, as a further specific embodiment, the mass ratio of the natural zeolite, water and ammonium sulfate is 1:(10-20):1; Preferably, the mass ratio of the natural zeolite, water and ammonium sulfate is 1:15:1.

[0017] Preferably, as a further specific embodiment, the pH value is 4-5; Preferably, the pH value is 4.5.

[0018] It can be known from the preparation method of the present invention that the present invention prepares a solution with ammonium sulfate, and then modifies the natural zeolite by adjusting the pH with concentrated sulfuric acid, so that impurities in the zeolite are removed, so that the surface of the zeolite is purer and its adsorption capacity is improved, and more acid sites are formed on the surface of the zeolite by acid-treating the natural zeolite. These sites can make the zeolite react better with the substance chemically, thereby enhancing its adsorption capacity, and the pore structure of the zeolite can be better adjusted by acid treatment, so that the pore structure of the modified zeolite is smoother, so that it can better adsorb macromolecular substances, and the pores of the modified zeolite are widened by acid treatment, and the adsorption capacity is greatly increased, so that the modified zeolite can further absorb harmful substances in the deicing agent, and the acid treatment can also increase the surface area of ​​the zeolite, so that its surface has more adsorption sites. The increase in the surface area of ​​the zeolite can better improve the adsorption efficiency of the zeolite, thereby further improving the environmental friendliness of the deicing agent, and the present invention The modification effect of natural zeolite by using ammonium sulfate is excellent. This is because when ammonium sulfate is used to modify zeolite, the divalent ions in the zeolite can be replaced as much as possible through ion exchange, thereby significantly improving its ion exchange capacity, thereby improving the performance of the zeolite, and the de-icing agent prepared by modifying zeolite with ammonium sulfate is environmentally friendly; therefore, in the present invention, the mass ratio of natural zeolite, water and ammonium sulfate and the pH of the solution are very important. When the mass ratio of natural zeolite, water and ammonium sulfate is 1: (10-15): 1, preferably when the mass ratio of natural zeolite, water and ammonium sulfate is 1: 10: 1, ammonium sulfate has an excellent modification effect on zeolite. This is because if ammonium sulfate is excessive, the skeleton structure of zeolite will be destroyed, thereby affecting its adsorption effect, and excessive ammonium sulfate will also cause the degree of dealumination in the zeolite skeleton to be too high, thereby destroying the crystal structure of zeolite and affecting its adsorption capacity; if the amount of ammonium sulfate is too small, the modification of zeolite will be incomplete, thereby affecting its adsorption capacity.

[0019] The pH range is also very important for the present invention. This is because the pH has a significant effect on the adsorption rate and adsorption capacity of the modified zeolite, and the adsorption mechanism of the modified zeolite includes ion exchange, ligand exchange and hydrogen bond interaction. The change in pH will greatly affect the balance of these reactions, thereby affecting the adsorption performance of the modified zeolite. Therefore, if the pH is too high, the adsorption performance of the zeolite will be reduced, thereby affecting the environmental friendliness of the de-icing agent; if the pH is too low, the structure of the zeolite will be destroyed, thereby affecting the adsorption effect of the modified zeolite.

[0020] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention provides an environmentally friendly de-icing agent, which uses ammonium sulfate as the main de-icing substance and modifies natural zeolite with ammonium sulfate to increase the internal pore solvent of the zeolite, thereby improving the adsorption capacity and loading capacity of de-icing components. The de-icing ability can be improved by combining ammonium sulfate with the de-icing agent while avoiding the harm caused by the use of chlorides.

[0021] (2) The present invention provides a method for preparing an environmentally friendly snow-melting agent. The method uses ammonium sulfate solution to modify natural zeolite so that the non-structural material in the internal pores is expanded, thereby increasing the pore volume of the zeolite and reducing the pore resistance, so that the zeolite has better adsorption capacity and loading capacity. It works together with other snow-melting components to achieve excellent snow-melting ability while causing less pollution to the environment. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with specific implementation methods, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] In order to more clearly explain the technical solution of the present invention, it is described in the form of specific embodiments below.

[0024] Example 1 The specific preparation process of the environmentally friendly snow melting agent of the present invention is as follows: Take 100g of natural zeolite, 1500g of ammonium sulfate, 100g of sodium hexametaphosphate, 200g of garden waste, 100g of corn cob particles, 100g of coal gangue, 1g of coal powder, 1g of polyacrylamide, 1g of concentrated sulfuric acid and 1000g of water; Take a beaker, add water and ammonium sulfate in sequence, and stir until the ammonium sulfate is completely dissolved to form an ammonium sulfate solution; Then, concentrated sulfuric acid was added to the ammonium sulfate solution while stirring with a stirring rod to adjust the pH of the solution to 4, and then the natural zeolite was completely immersed in the solution, stirred for 3 hours, filtered, and dried to obtain a modified zeolite, wherein the mass ratio of the added natural zeolite, water, and ammonium sulfate was 1:10:1; Then, garden waste, corn cob particles and coal gangue are crushed and mixed evenly to obtain biomass; Then, the remaining ammonium sulfate, biomass, modified zeolite, coal powder, sodium hexametaphosphate and polyacrylamide are added to the reactor in sequence, the reactor is started and stirred, and then pressed by a press to obtain the product.

[0025] Example 2 The specific preparation process of the environmentally friendly snow melting agent of the present invention is as follows: Take 200g natural zeolite, 1600g ammonium sulfate, 150g sodium hexametaphosphate, 300g garden waste, 150g corn cob particles, 200g coal gangue, 5g coal powder, 4g polyacrylamide, 3g concentrated sulfuric acid and 2000g water; Take a beaker, add water and ammonium sulfate in sequence, and stir until the ammonium sulfate is completely dissolved to form an ammonium sulfate solution; Then, concentrated sulfuric acid was added to the ammonium sulfate solution while stirring with a stirring rod to adjust the pH of the solution to 5, and then the natural zeolite was completely immersed in the solution, stirred for 3 hours, filtered, and dried to obtain a modified zeolite, wherein the mass ratio of the added natural zeolite, water, and ammonium sulfate was 1:20:1; Then, garden waste, corn cob particles and coal gangue are crushed and mixed evenly to obtain biomass; Then, the remaining ammonium sulfate, biomass, modified zeolite, coal powder, sodium hexametaphosphate and polyacrylamide are added to the reactor in sequence, the reactor is started and stirred, and then pressed by a press to obtain the product.

[0026] Example 3 The specific preparation process of the environmentally friendly snow melting agent of the present invention is as follows: Take 150g natural zeolite, 1550g ammonium sulfate, 120g sodium hexametaphosphate, 250g garden waste, 130g corn cob particles, 150g coal gangue, 3g coal powder, 2g polyacrylamide, 1g concentrated sulfuric acid and 1500g water; Take a beaker, add water and ammonium sulfate in sequence, and stir until the ammonium sulfate is completely dissolved to form an ammonium sulfate solution; Then, concentrated sulfuric acid was added to the ammonium sulfate solution while stirring with a stirring rod to adjust the pH value of the solution to 4.5, and then the natural zeolite was completely immersed in the solution, stirred for 3 hours, filtered, and dried to obtain the modified zeolite, wherein the mass ratio of the added natural zeolite, water, and ammonium sulfate was 1:15:1; Then, garden waste, corn cob particles and coal gangue are crushed and mixed evenly to obtain biomass; Then, the remaining ammonium sulfate, biomass, modified zeolite, coal powder, sodium hexametaphosphate and polyacrylamide are added to the reactor in sequence, the reactor is started and stirred, and then pressed by a press to obtain the product.

[0027] Example 4 The specific preparation method is the same as that of Example 3, except that sodium hexametaphosphate is replaced by sodium gluconate.

[0028] Example 5 The specific preparation method is the same as that of Example 3, except that sodium hexametaphosphate is replaced by glucose.

[0029] Example 6 The specific preparation method is consistent with that of Example 3, except that sodium hexametaphosphate is replaced by a mixture of glucose and sodium gluconate.

[0030] Example 7 The specific preparation method is consistent with that of Example 3, except that sodium hexametaphosphate is replaced by a mixture of sodium dihydrogen phosphate and glucose.

[0031] Example 8 The specific preparation method is consistent with that of Example 3, except that sodium hexametaphosphate is replaced by a mixture of sodium dihydrogen phosphate and sodium gluconate, and the mass ratio of sodium dihydrogen phosphate to sodium gluconate is 1:1.

[0032] Example 9 The specific preparation method is consistent with that of Example 8, except that the mass ratio of sodium dihydrogen phosphate to sodium gluconate is adjusted to 2:1.5.

[0033] Example 10 The specific preparation method is consistent with that of Example 8, except that the mass ratio of sodium dihydrogen phosphate and sodium gluconate is adjusted to 1.5:1.

[0034] Embodiment 11 The specific preparation method is consistent with that of Example 10, except that the mass ratio of natural zeolite, water and ammonium sulfate is adjusted to 1:5:1, that is, the amounts of natural zeolite, water and ammonium sulfate are adjusted to 150 g, 750 g and 150 g.

[0035] Example 12 The specific preparation method is consistent with that of Example 10, except that the mass ratio of natural zeolite, water and ammonium sulfate is adjusted to 1:30:1, that is, the amounts of natural zeolite, water and ammonium sulfate are adjusted to 50g, 750g and 50g.

[0036] Embodiment 13 The specific preparation method is consistent with that of Example 10, except that the pH is adjusted to 3.

[0037] Embodiment 14 The specific preparation method is consistent with that of Example 10, except that the pH is adjusted to 6.

[0038] Comparative Example 1 The specific preparation method is consistent with that of Example 10, except that no corrosion inhibitor is used.

[0039] Comparative Example 2 The specific preparation method is the same as that of Example 10, except that natural zeolite is not used.

[0040] Comparative Example 3 The specific preparation method is consistent with that of Example 10, except that hydrochloric acid is used to modify the natural zeolite.

[0041] Comparative Example 4 The specific preparation method is the same as that of Example 10, except that the natural zeolite is not modified.

[0042] Comparative Example 5 The specific preparation method is the same as that of Example 10, except that corncob particles are not used.

[0043] Experimental Example 1 Comparison of performance of environmentally friendly snow melting agents In this experimental example, the control group uses a common deicing agent on the market, while the experimental group is the deicing agent obtained in Examples 1-14 and Comparative Examples 1-5 of the present invention; The specific detection process is as follows: (1) Snow-melting and ice-melting ability test: a beaker containing 25 mL of deionized water was placed in a -20°C refrigerator and frozen. At the same time, 10 mL of the snow-melting agent obtained in Examples 1-14 and Comparative Examples 1-5 and a common snow-melting agent on the market were placed in a -20°C refrigerator and frozen for 12 h; After freezing, the deicing agent solution was poured onto ice, and the volume of the melted brine was measured at the same time interval until the ice cubes were finally completely melted. The relative deicing and ice-melting capacity of the deicing agent was calculated at 30 minutes, and the results are shown in Table 1. The calculation formula for relative snow and ice melting capacity is:

[0044] Where, m0 is the mass of the beaker and ice cubes without adding deicing solution, g; m1 is the mass of the beaker and remaining ice cubes after pouring out the deicing solution and melted ice, g; m ′ 0 is the mass of the beaker and ice cubes without adding the common deicing agent on the market, g; m ′ 1 is the mass of the beaker and the remaining ice after deriving the solution of common snow-melting agents on the market and melting the ice, g.

[0045] Experimental Example 2: Testing the Corrosion of Deicing Agents to Metals Metal carbon steel was placed in 100mL of 5wt% solution of each deicing agent for 48h to determine the effect of deicing agent on its weight and morphology. Deionized water was used instead of deicing agent solution in the control test, marked as CK. The corrosion rate was calculated as follows: V-8760(m-m0)×10 / spt Where V is the corrosion rate of the deicing agent on the metal, mm / a; m is the mass lost by the metal carbon steel after the reaction is completed, g; m0 represents the mass lost by the metal carbon steel after pickling, g; s is the surface area of ​​the carbon steel, cm 2 ; p is the density of the metal specimen, g / cm 3; t represents the test time, h. The test results are shown in Table 1.

[0046] Experimental Example 3: Detection of relative seed damage rate Select the bluegrass seeds with full and intact grains, rinse and soak them with 5wt% H2O2 solution for 5 minutes, and evenly place them in a germination box padded with qualitative filter paper, with 100 bluegrass seeds placed in each germination box. Add 5mL of each deicing agent solution (0.5wt%) to moisten each seed (but not immerse it), and culture them in a constant temperature incubator at 26±1℃ for one week. During this period, a certain amount of deicing agent solution is regularly added to the germination box to ensure that the bluegrass seeds are in a moist state. Deionized water is used instead of the deicing agent solution in the blank control experiment. Four parallel experiments were performed in each group; The specific formula is:

[0047]

[0048]

[0049] In the formula, f represents germination rate, %; 100 represents the number of seeds in parallel experiments; F represents the average germination rate, %; 4 represents the number of parallel experiments; S represents the relative damage rate of snow melting agent to seeds, %, and the specific results are shown in Table 1 below;

[0050] Therefore, it can be known from the above table that by comparing the data in Examples 1-14 and Comparative Examples 1-5, it can be known that the de-icing agent prepared according to the scheme provided by the present invention has excellent de-icing performance and excellent environmental friendliness. This is because the present invention uses ammonium sulfate as the main component in the de-icing agent, combines garden waste and natural zeolite to prepare an environmentally friendly de-icing agent, which has excellent de-icing effect and can avoid using chloride to pollute the environment. Moreover, compared with traditional chloride de-icing agents, the de-icing agent prepared with ammonium sulfate as the main de-icing substance has better de-icing effect. This is because the scenes in which de-icing agents are used are often at lower temperatures, and ammonium sulfate is more suitable for lower temperatures and dry snow environments than traditional chloride de-icing agents. Therefore, the de-icing agent prepared with ammonium sulfate as the main raw material can still effectively melt dry snow at lower temperatures and can be used in extremely cold environments. Moreover, compared with sodium chloride, ammonium sulfate has little impact on the environment and is not easy to cause soil compaction and plant damage. Therefore, Using ammonium sulfate as the main snow-melting material is more advantageous than traditional chlorides; and in order to solve the problem that ammonium sulfate has low solubility at low temperatures, thereby affecting its snow-melting effect, the present invention uses a combination of natural zeolite and coal powder, utilizes the heat release characteristic of natural zeolite when absorbing water, and combines coal powder as a coloring agent, and absorbs more heat through the action of coal powder, thereby improving the solubility of ammonium sulfate, so that the prepared snow-melting agent has a better snow-melting effect, and because zeolite can absorb harmful chemicals in the snow-melting agent, it can prevent the snow-melting agent from polluting nearby soil and water sources, and zeolite has efficient adsorption capacity, can absorb excess water to form a high traction surface, thereby accelerating the melting of ice and snow, therefore, for the present invention, ammonium sulfate is used as the main snow-melting material, combined with natural zeolite and coal powder to prepare an environmentally friendly snow-melting agent, wherein the addition of natural zeolite and coal powder can greatly improve the snow-melting ability of ammonium sulfate, and by adding natural zeolite, it is used to adsorb harmful substances, so that the prepared snow-melting agent can further reduce pollution to the environment. The present invention also adds natural ingredients corncob particles, garden waste and corrosion inhibitors, and the sugar contained in the corncob particles absorbs more water and improves the friction of the road surface, thereby improving the snow melting ability of the snow melting agent. The corncob particles are natural ingredients, so that the prepared snow melting agent has higher environmental friendliness. The corncob particles form a protective layer on the road surface, and the synergistic effect with the corrosion inhibitor can prevent the road surface from being damaged, thereby extending the service life of the road surface. In the present invention, natural garden waste, coal gangue and polyacrylamide are used as the forming agent of the snow melting agent, so as to further improve the environmental friendliness of the snow melting agent.

[0051] By comparing Examples 3-10 and Comparative Example 1, it can be known that the selection of corrosion inhibitor is very important for the road surface. This is because ammonium sulfate has a certain corrosiveness to metals. During the use of ammonium sulfate, it can corrode metals and other materials faster and more widely, and ammonium sulfate itself can react with many metals to cause metal corrosion. Therefore, in order to avoid ammonium sulfate from corroding metals and affecting the life of the road surface, the present invention uses a corrosion inhibitor and combines corn cob particles to reduce the corrosion of the snow-melting agent to the road surface while having excellent snow-melting ability. Therefore, the present invention selects one or more of sodium hexametaphosphate, sodium gluconate, sodium citrate, sodium dihydrogen phosphate, glucose, maltose, sucrose, sodium silicate, aspartic acid and thiourea as corrosion inhibitors. Preferably, the corrosion inhibitor is one or more of sodium gluconate, sodium citrate, sodium dihydrogen phosphate, glucose, thiourea and aspartic acid. More preferably, when the corrosion inhibitor is a mixture of sodium gluconate, sodium dihydrogen phosphate and thiourea, the snow-melting agent prepared by the mixture has excellent snow-melting effect. At the same time, it can also better extend the life of the road surface. Sodium gluconate itself, as a non-corrosive raw material, can interact well with snow and ice to form hydrated ions, so that the amount of heat required for cooling is increased, thereby further reducing the melting point of ice, thereby accelerating the melting of ice. Sodium gluconate molecules have strong hydrophilicity and can well adsorb surrounding water molecules, thereby further accelerating the melting of snow and ice. The combination of sodium gluconate and sodium dihydrogen phosphate can further reduce the melting point of ice, accelerate snow melting, and further reduce the corrosion of substances in the snow-melting agent to metals. The mass ratio between sodium gluconate and sodium dihydrogen phosphate is also very important for the present invention. When the mass ratio of sodium gluconate to sodium dihydrogen phosphate is (1-2): (1-1.5), preferably when the mass ratio of sodium gluconate to sodium dihydrogen phosphate is 1.5:1, the snow-melting agent prepared has excellent effect. This is because the mixture of sodium gluconate and sodium dihydrogen phosphate can further reduce the melting point of ice and further extend the service life of the road surface.

[0052] By comparing Examples 11-12, it can be known that in the preparation method of the present invention, the mass ratio of natural zeolite, water and ammonium sulfate is very important. When the mass ratio of natural zeolite, water and ammonium sulfate is 1: (10-20): 1, preferably when the mass ratio of natural zeolite, water and ammonium sulfate is 1: 15: 1, ammonium sulfate has an excellent modification effect on zeolite. This is because excessive ammonium sulfate will cause the skeleton structure of the zeolite to be destroyed, thereby affecting its adsorption effect, and excessive ammonium sulfate will also cause the degree of dealumination in the zeolite skeleton to be too high, thereby destroying the crystal structure of the zeolite and affecting its adsorption capacity; and if the amount of ammonium sulfate is too little, the modification of the zeolite will be incomplete, thereby affecting its adsorption capacity.

[0053] By comparing Examples 13-14, it can be seen that the pH range is also very important for the present invention. This is because the pH has a significant effect on the adsorption rate and adsorption capacity of the modified zeolite, and the adsorption mechanism of the modified zeolite includes ion exchange, ligand exchange and hydrogen bond interaction. The change in pH will greatly affect the balance of these reactions, thereby affecting the adsorption performance of the modified zeolite. Therefore, if the pH is too high, the adsorption performance of the zeolite will be reduced, thereby affecting the environmental friendliness of the deicing agent; if the pH is too low, the structure of the zeolite will be destroyed, thereby affecting the adsorption effect of the modified zeolite.

[0054] By comparing Example 10 with Comparative Examples 2-4, it can be known that the use of natural zeolite and the operation of modifying natural zeolite are very important for the present invention. This is because by using a combination of natural zeolite and coal powder, utilizing the characteristic of natural zeolite releasing heat when absorbing water, and combining with coal powder as a coloring agent, more heat is absorbed through the action of coal powder, thereby increasing the solubility of ammonium sulfate, making the prepared deicing agent have a better deicing effect, and because zeolite can absorb harmful chemicals in the deicing agent, it can prevent the deicing agent from polluting nearby soil and water sources, and zeolite has a high adsorption capacity, can absorb excess water to form a high traction surface, thereby accelerating the melting of ice and snow, so for the present invention, ammonium sulfate is used as the main deicing substance, combined with natural zeolite and coal powder to prepare an environmentally friendly deicing agent, wherein the addition of natural zeolite and coal powder can greatly improve the deicing ability of ammonium sulfate, and by adding natural zeolite, it is used to adsorb harmful substances, so that the prepared deicing agent can further reduce pollution to the environment, and the impurities in the modified zeolite are removed, so that the surface of the zeolite is more The invention discloses a novel method for preparing a novel zeolite. The method comprises the steps of: treating the zeolite with an acid to form more acid sites on the surface of the zeolite, and treating the zeolite with an acid to form more acid sites. These sites can make the zeolite react with the substance better, thereby enhancing its adsorption capacity. The acid treatment can better adjust the pore structure of the zeolite, so that the pore structure of the modified zeolite is smoother, so that the macromolecular substance can be better adsorbed. The acid treatment widens the pores of the modified zeolite, greatly increases the adsorption capacity, and enables the modified zeolite to further absorb harmful substances in the deicing agent. The acid treatment can also increase the surface area of ​​the zeolite, so that the surface of the zeolite has more adsorption sites. The increase in the surface area of ​​the zeolite can better improve the adsorption efficiency of the zeolite, thereby further improving the environmental friendliness of the deicing agent. The invention also has an excellent effect of modifying the natural zeolite with ammonium sulfate, because when the zeolite is modified with ammonium sulfate, the divalent ions in the zeolite can be replaced as much as possible through ion exchange, thereby significantly improving its ion exchange capacity, thereby improving the performance of the zeolite, and the deicing agent prepared by modifying the zeolite with ammonium sulfate is environmentally friendly.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An environmentally friendly snow-melting agent, characterized in that: Calculated by weight, it is mainly made from the following raw materials: 100-200 parts of natural zeolite, 1500-1600 parts of ammonium sulfate, 100-150 parts of corrosion inhibitor, 200-300 parts of garden waste, 100-150 parts of corn cob particles, 100-200 parts of coal gangue, 1-5 parts of coal powder, 1-4 parts of polyacrylamide, 1-3 parts of concentrated sulfuric acid and 1000-2000 parts of water.

2. The environmentally friendly snow-melting agent according to claim 1, characterized in that: 120-180 parts of natural zeolite, 1510-1560 parts of ammonium sulfate, 110-140 parts of corrosion inhibitor, 220-250 parts of garden waste, 110-140 parts of corn cob particles, 110-180 parts of coal gangue, 3-4 parts of coal powder, 2-3 parts of polyacrylamide, 1-2 parts of concentrated sulfuric acid and 1200-1800 parts of water.

3. The environmentally friendly snow-melting agent according to claim 1, characterized in that: 150 parts of natural zeolite, 1550 parts of ammonium sulfate, 120 parts of corrosion inhibitor, 250 parts of garden waste, 130 parts of corn cob particles, 150 parts of coal gangue, 3 parts of coal powder, 2 parts of polyacrylamide, 1 part of concentrated sulfuric acid and 1500 parts of water.

4. The environmentally friendly snow melting agent according to claim 1, characterized in that: The corrosion inhibitor is one or more of sodium hexametaphosphate, sodium gluconate, sodium citrate, sodium dihydrogen phosphate, glucose, maltose, sucrose, sodium silicate, aspartic acid and thiourea.

5. The environmentally friendly snow melting agent according to claim 4, characterized in that: The corrosion inhibitor is one or more of sodium gluconate, sodium citrate, sodium dihydrogen phosphate, glucose, thiourea and aspartic acid.

6. The environmentally friendly snow-melting agent according to claim 5, characterized in that: The corrosion inhibitor is a mixture of sodium gluconate and sodium dihydrogen phosphate; Preferably, the mass ratio of sodium gluconate to sodium dihydrogen phosphate is (1-2): (1-1.5).

7. The environmentally friendly snow-melting agent according to claim 6, characterized in that: The mass ratio of the sodium gluconate to sodium dihydrogen phosphate is 1.5:

1.

8. A method for preparing an environmentally friendly snow-melting agent according to any one of claims 1 to 7, characterized in that: The following steps are involved: ammonium sulfate and water are prepared into an ammonium sulfate solution; Add concentrated sulfuric acid to the ammonium sulfate solution to adjust the pH, then completely immerse the natural zeolite in the solution, stir, filter, and dry to obtain the modified zeolite; The garden waste, corn cob particles and coal gangue are crushed and mixed respectively and then uniformly obtained to obtain biomass; Ammonium sulfate, biomass, modified zeolite, coal powder, corrosion inhibitor and polyacrylamide are added in sequence, stirred evenly and then pressed to obtain the product.

9. The preparation method according to claim 8, characterized in that: The mass ratio of the natural zeolite, water and ammonium sulfate is 1:(10-20):1; Preferably, the mass ratio of the natural zeolite, water and ammonium sulfate is 1:15:

1.

10. The preparation method according to claim 8, characterized in that: The pH value is 4-5; Preferably, the pH value is 4.5.

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