KR101680314B1 - Manufacturing method of environment friendly liquid snow removal materials using expanded pearlite and solid calcium chloride - Google Patents

Abstract

The present invention relates to a method for preparing an environment-friendly liquid snow-removal agent using expanded pearlite and solid calcium chloride, in which: expanded pearlite formed by heating pearlite is mixed with any one modifying agent selected from sandy clay, peat moss, zeolite, and vermiculite and the resultant mixture is heated to modify the expanded pearlite; an environment-friendly liquid snow-removal agent produced by inputting a functional additive into liquid calcium chloride prepared by using hydrochloric acid and limestone is absorbed into the modified expanded pearlite to improve air permeability, water retention ability, and fertilizer retention ability, and durability; the environment-friendly liquid snow-removal agent is separated from the modified pearlite by dehydration during removal of snow on the road, and is sprayed in a typical manner of spraying a liquid snow-removal agent or sprayed in a mixture form containing a functional additive therein when an aqueous solid calcium chloride solution is used a snow-removal agent, thereby reducing corrosiveness and damage to plants and improving deicing property; and the environment-friendly liquid snow-removal agent is absorbed in the modified pearlite to enable durability to be improved when sprayed onto the road. The method comprises the following steps: mixing expanded pearlite with any one modifying agent selected from sandy clay, peat moss, zeolite, and vermiculite, and then heating the resultant mixture to modify the expanded pearlite (S110); inputting additives into liquid calcium chloride to form an environment-friendly liquid snow-removal agent (S120); absorbing the environment-friendly liquid snow-removal agent into the modified expanded pearlite (S130); packaging, transferring and storing the expanded pearlite in which the environment-friendly liquid snow-removal agent was absorbed (S140); and separating the stored expanded pearlite into the environment-friendly liquid snow-removal agent and the expanded pearlite through dehydration by means of centrifugation.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a process for producing an eco-friendly liquid snow-

The present invention relates to a method for producing an environmentally-friendly liquid snow remover using expanded pearlite and solid phase calcium chloride, and more particularly, to a method for producing an environmentally-friendly liquid removers by heating expanded perlite formed by heating perlite to mix any reformed material selected from masato, peatmoss, zeolite and vermiculite, , The expanded pearlite is reformed, and the functional liquid additive is added to the liquid calcium chloride prepared by using hydrochloric acid and limestone to absorb the environmentally-friendly liquid pour agent into the modified expanded pearlite to improve the breathability, water retention, bobbility, and durability , When the road is snowing, the environmentally-friendly liquid snow remover is separated from the modified pearlite and sprayed by the conventional liquid snow remover spray method or when mixed with the functional additive in the case of using the solid aqueous calcium chloride solution as the barrier agent, And improve the melting property The present invention also relates to a process for producing an eco-friendly liquid removers using expanded calcium perchlorate and expandable pearlite which can be absorbed by the modified pearlite to improve the sustainability of road pavement.

Conventional snow removers are produced by reacting limestone or slaked lime with hydrochloric acid to make a calcium chloride solution and evaporate water to produce solid calcium chloride, or as a liquid phase and used as a road rust remover. However, since the solid calcium chloride consumes a large amount of energy when dried, the liquid calcium chloride has a disadvantage in that it is difficult to store and store a large amount of water depending on the needs of a separate liquid storage tank facility, .

Conventionally, a conventional technique is to spray solid-phase calcium chloride or liquid calcium chloride on the road to dissolve solid calcium chloride or liquid calcium chloride in the water of the road to lower the freezing point to prevent freezing on the road. However, Calcium chloride and liquid calcium chloride flow directly into streams after snow removal, are absorbed into the soil, or cause corrosion of facilities.

In addition, equipment for spraying solid calcium chloride and liquid calcium chloride on the road has been developed, and solid calcium chloride or liquid calcium chloride is sprayed on the road in winter. However, if solid calcium chloride or liquid calcium chloride is sprayed on the road, There is a disadvantage in that it causes a corrosion problem in vehicles, roads, bridges and the like, and shortens the service life of roads, buildings, vehicles and the like due to a direct contact of a large amount of salinity. In addition, there is a report that plants such as vegetation, trees, and vegetables on roads are damaged due to high absorption of soils and increased salinity. It is also reported that the corrosion rate of bridges and vehicle welds is increased 20-40 times.

However, to develop a snow remediation agent to reduce such damage, there is no proven research result yet, and since it is expensive, calcium chloride is used as a snow remover. In addition, the currently used liquid calcium chloride has a high transportation cost, requires a storage tank to be stored, and the solid calcium chloride consumes a lot of energy due to the solid state drying by applying heat energy to the liquid calcium chloride.

To solve these problems, Korean Patent No. 10-149502 has been proposed.

The prior art discloses a method for producing a pearlite pearlite comprising the steps of: modifying the expanded pearlite by mixing and heating any one selected from the group consisting of masato, peatmoss, zeolite and vermiculite; Injecting liquid calcium chloride into the modified expanded pearlite; And a step of raising the concentration of the liquid calcium chloride by cooling and drying the expanded pearlite filled with the liquid calcium chloride at room temperature to absorb the liquid calcium chloride in the pores of the modified expanded pearlite thereby to be stored and handled like solid calcium chloride It has improved breathability, water retention, and bubbling properties when sprayed on soil, and it can improve water spread. It reduces the damage caused by direct contact of liquid calcium chloride when spraying on the road, and has sustainability of snow removal.

However, the prior patent has a problem in that the liquid calcium chloride is absorbed by pearlite and is sprayed on the road to increase the durability and reduce the damage to the kitchen, but the frost resistance is lowered at the time of use, the manufacturing cost is high, and it is difficult to apply to existing snow removal equipment at the time of spraying on site.

1. Korean Registered Korean Patent No. 10-149502 entitled " Method for manufacturing solidified snow removers of liquid calcium chloride snow removers using expanded pearlite "(Registered on Feb. 16, 2015)

Accordingly, an object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide an expandable pearlite having a pore structure having numerous pore structures, having a small volume to volume ratio and capable of high cation exchange by ion substitution, Is mixed with any one selected from the group consisting of kaolin, kaolin, zeolite, and vermiculite and heated to absorb the eco-friendly liquid snow remover produced by mixing the liquid calcium chloride and the functional additive prepared by using hydrochloric acid and limestone in the expanded expanded pearlite, Breathability, water retention, bobbility, and storage; By directly spraying the modified expanded pearlite absorbed by the environmentally friendly liquid snow remover, it is possible to increase the sustainability and minimize the damage to the facility. By liquefying the environmentally-friendly liquid snow remover by dewatering at the time of spraying, To provide an eco-friendly liquid snow removing agent using an expanding pearlite capable of reducing corrosiveness and damage to a plant, and capable of enhancing a frost resistance.

It is also an object of the present invention to provide a method for producing a solid calcium chloride aqueous solution by mixing an additive in a solid calcium chloride aqueous solution and absorbing it into modified pearlite to increase the durability or to use a solid calcium chloride aqueous solution mixed with additives directly, To provide an eco-friendly liquid snow removing agent using the same.

According to the present invention, there is provided a process for preparing an environmentally-friendly liquid snow remover using expanded pearlite and solid calcium chloride, comprising the steps of: modifying the expanded pearlite by mixing and heating any one selected from the group consisting of marathon, peatmoss, zeolite and vermiculite; Adding an additive to the liquid calcium chloride to form an eco-friendly liquid snow remover; Absorbing the environmentally-friendly liquid snow remover into the modified expanded pearlite; Packaging, transporting and storing the expanded pearlite absorbed by the environmentally-friendly liquid snow remover; And separating the environmentally-friendly liquid snow removing agent and the expanded pearlite by dewatering the stored expanded pearlite by centrifugal separation.

The method of manufacturing an environmentally friendly liquid snow removing agent using the expanded pearlite and the solid calcium chloride according to the present invention has the advantage that the problems of transportation and storage of the snow remover can be improved by reducing the damage to the corrosive environment and facility environment and solidifying the liquid agent product with low energy have.

In addition, there is an advantage that stagnation due to moisture absorption during storage of the snow remover can be prevented.

In addition, when used in the field, it is possible to reduce the manufacturing cost by recycling the remaining pearlite extracted from the eco-friendly liquid snow remover and improving the frostability by spraying the eco-friendly liquid snow remover extracted from the expanded pearlite stored by dehydration by centrifugation There is an advantage.

In addition, when a solid calcium chloride aqueous solution is used as a building material, it is mixed with functional additives in the field and directly sprayed on the road or absorbed by modified pearlite to spread the road, thereby improving the frostability or durability, There is an advantage in that it can be converted into a snow remover.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flow diagram of a method for manufacturing an environmentally-friendly liquid snow remover using expanded pearlite and solid phase calcium chloride according to one embodiment of the present invention.
2 is a flow diagram of a method for manufacturing an eco-friendly liquid snow remover using expanded pearlite and solid phase calcium chloride according to another embodiment of the present invention.

Hereinafter, a method of manufacturing an environmentally-friendly liquid snow remover using expanded pearlite and solid phase calcium chloride according to the present invention will be described in detail with reference to the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and they may vary depending on the intentions or customs of the client, the operator, the user, and the like. Therefore, the definition should be based on the contents throughout this specification.

Like numbers refer to like elements throughout the drawings.

Expansive pearlite is usually formed by the rapid cooling of lava in viscous peridotite, which has a lubricious or pearly luster and is usually gray or green, but may also be brown, blue or red. The expanded pearlite is a natural glass containing 70% or more of natural SiO _{2, which} is produced by crushing and drying a rock having a concentric circle breaking into a small pearl-shaped piece and putting it in a high-temperature baking furnace. Generally, a product made by expanding and exploding perlite at 1,000 ~ 1300 ℃ is called expansion pearlite and has a specific gravity of 0.1 ~ 0.25.

Calcium chloride can be obtained by the hydrochloric acid method, which is produced by adding hydrochloric acid to limestone (calcium carbonate), or the Solvay method, which is obtained by concentrating the waste liquid of the ammonia distillation column generated in the manufacturing process of sodium carbonate and recovering it as salt. Preferably, the hydrochloric acid method is applied, but hydrochloric acid and limestone are reacted to obtain a calcium chloride solution. The calcium chloride solution obtained by using hydrochloric acid adjusts the acidity by adding an alkaline substance. The prepared calcium chloride solution may have a density of 1.294 to 1.31 g / ml, a pH of 7 to 9, and a CaCl ₂ content of 0.2 to 0.4 g / g.

In the process for producing an environmentally-friendly liquid snow remover using expanded pearlite and solid calcium chloride according to the present invention, expanded pearlite is used, and the components of the expanded pearlite are as follows.

_{SiO 2 70 ~ 75%, Al} 2 O 3 12 ~ 16%, FeO 3 0.15 ~ 1.5%, CaO 0.1 ~ 0.2%, MgO 0.25 ~ 0.5%, K 2 O 1 ~ 4%, Na 2 O 2.5 ~ 5% , Other

Now, referring to FIG. 1, a method of manufacturing an environmentally-friendly liquid snow remover using expanded pearlite and solid calcium chloride according to an embodiment of the present invention will be described.

First, the expanded pearlite is mixed with a modifier selected from the group consisting of marathon, peat moss, zeolite, and vermiculite and heated to physically modify the expanded pearlite (S110).

Thereafter, an additive is added to the liquid calcium chloride to form an environmentally-friendly liquid snow removing agent (S120).

Thereafter, the eco-friendly liquid snow remover is absorbed into the expanded expanded pearlite (S130)

Thereafter, the absorbed expanded pearlite is packed, transported and stored (S140).

Thereafter, the stored expanded pearlite is dewatered by centrifugal separation to extract the eco-friendly liquid snow remover, thereby separating the expanded pearlite and the eco-friendly liquid snow remover (S150).

The eco-friendly liquid snow remover thus extracted is sprayed on the ground using a conventional snow remover.

In step S110, the expansion pearlite is reformed at normal pressure at 100 to 300 DEG C for about 5 to 30 minutes. Depending on the modified material, the expansion pearlite may be expanded (expanded, Pearlite can be modified. For the sake of brevity, the masato has good air permeability and bobbility, but has good water retention. The peat moss has good water retentivity and bubbling property, good air permeability, and zeolite has poor water retentivity and bubbling property but good air permeability, Both water retentivity and bobbility are good.

Further, in the step S110, the expansion pearlite is modified by mixing 5 to 30 parts by weight of any one modifier selected from the group consisting of marathon, peatmoss, zeolite and vermiculite with 100 parts by weight of expanded pearlite and heating. If the amount of the carnauba is less than 5 parts by weight, water retention will decrease. If the amount of carnauba is more than 30 parts by weight, slipping due to reduction in road friction may occur. If the amount of the peat moss is less than 5 parts by weight, the breathability, water retention and bobbility are lowered. If the peat moss exceeds 30 parts by weight, the corrosion of the facility may be increased due to the decrease in the pH. If the amount of the zeolite is less than 5 parts by weight, water retentivity and bobbility are lowered and the road friction force is decreased. If the zeolite is more than 30 parts by weight, the calcium chloride absorption rate may be lowered. If the amount of the vermiculite is less than 5 parts by weight, the water retention and bobbility are lowered and the sustainability of the snow removal is lowered. If the vermiculite is more than 30 parts by weight, the effect of the deicing action may be deteriorated.

If the modified pearlite has a modifying time of less than 5 minutes, water is not properly dewatered from the expanded pearlite. If the modified pearlite modifying time exceeds 30 minutes, the energy consumption is excessively large, .

If the reforming temperature of the expanded pearlite is less than 100 ° C, the reforming is not performed well. If the expansion temperature of the expanded pearlite is higher than 300 ° C, the energy consumption is excessively large and the production cost may increase .

In the step S120, the additive may be added in an amount of 0.1 to 4 parts by weight of BTA (C ₆ H ₅ N ₃ ), 0.1 to 4 parts by weight of DAN (C ₆ H ₁₁ ) ² NH ₂ ) NO _{2 based} on 100 parts by weight of the liquid calcium chloride 0.1 to 4 parts by weight of MEA (C ₂ H ₇ NO), 1 to 4 parts by weight of TEA, less than 500 ppm of Na ₂ NO ₃ , less than 100 ppm of Na ₃ PO _{4 and} less than 500 ppm of Urea Or may be optionally added depending on the application.

Here, the BTA is an adsorption inhibitor, and nitrogen of an azole group is involved in adsorption. Due to the presence of a non-covalent electron pair in the nitrogen, the chemical adsorption is very easy on the metal surface, thereby preventing corrosion or contamination. Although BTA is known as a corrosion inhibitor of Cu, it can be applied to other metals. When BTA is applied to Fe, the chemical bond between Fe ion and BTA is a structure of polymer structure with good denseness and continuity through the coordination bond including the non-covalent electron pair of nitrogen and the covalent bond formed by substitution of hydrogen atom from the -NH group. And it is schematically shown as follows.

The structure of BTA complex film shows that BTA chemically adsorbs on the iron surface and blocks other aggressive compounds to protect the iron from oxidation and corrosion.

[Chemical Formula 1]

Fe + 1 / 2O 2 + 2 C ₆ H ₄ N ₂ NH → (C ₆ H ₄ N ₂ N) ² Fe + H ₂ O

Also, the DAN is a vapor corrosion inhibitor, and when moisture in the air condenses on the metal surface, it gradually evaporates as shown in the following diagram, preventing the metal from reacting with oxygen and water to corrode.

In addition, the DAN is dissolved in the water condensed on the metal as shown in the following diagram to have a corrosion-inhibiting action, and an adsorption coating is formed, thus acting as a system.

The following formula (2) shows the mechanism of corrosion inhibition due to the formation of a film of DAN adsorbed by DAN and Fe.

(2)

Fe + 2 (C ₆ H ₁₁ ) ² NHHNO ₂ → [(C ₆ H ₁₁ ) ² NH] ² Fe (NO ₂ ) ² +

In general, the vapor corrosion inhibitor exhibits a system effect by forming a molecular barrier film on the metal surface and neutralizing the acidic substance adsorbed on the metal surface.

Ethanolamine is an adsorption-type corrosion inhibitor that blocks the corrosive substances by molecules of the inhibitor chemically adsorbing to the metal surface to form a protective coating. The electron density of the adsorption center is influenced by the electron accepting property or the electron inducing property of the hydrogen molecule of the amine group and the substituted alkyl group or the alkyl hydroxyl group. The ethanolamine is produced by the reaction of ethylene oxide (EO, C ₂ H ₄ O) with ammonia and is divided into three types according to the number and type of alcohol: MEA, DEA and TEA. In addition, it has been found that MEA is used as a corrosion inhibitor of aluminum, and TEA has been used as a corrosion inhibitor to remove chloride ions.

In addition, Na ₂ NO ₃ serves to prevent the oxygen concentration contained in the liquid calcium chloride from being lowered and to participate in the corrosion reaction.

In addition, Na ₃ PO ₄ reacts with metals to form a passive state, which can lower the damage of soil by calcium and phosphate during soil absorption.

Urea also acts to prevent corrosion and can reduce plant damage to the plant's nitrogen source.

Here, if the BTA, DAN, MEA, TEA, Na ₂ NO _3, Na ₃ PO _4, Urea is respectively 0.1 part by weight, 0.1 part by weight, 0.1 part by weight, 1 part by weight and less than 100 ppm, 100 ppm, 200 ppm, 4 parts by weight, 4 parts by weight, 4 parts by weight, 500 ppm by weight, 100 ppm by weight of BTA, DAN, MEA, TEA, Na ₂ NO ₃ , Na ₃ PO ₄ and Urea, If it exceeds 500 ppm, the prevention effect can not be obtained as much as the excess amount, and only the manufacturing cost is increased.

In the present invention, the additive should be prepared and used in the range of 10 to 80% of the additive solubility in each ratio.

In step S150, the expanded pearlite extracted with the eco-friendly liquid snowmob agent is recovered and recycled.

Hereinafter, a method for manufacturing an environmentally-friendly liquid snow removing agent using expanded pearlite and solid calcium chloride according to another embodiment of the present invention will be described with reference to FIG.

According to another embodiment of the present invention, an additive is added to and mixed with a solid aqueous solution of calcium chloride to dissolve and solidify solid phase calcium chloride in water to lower the corrosiveness and eco-friendliness when spraying, thereby producing an environmentally friendly liquid snow remover Can,

First, an additive is prepared (S210).

Thereafter, the additive is added to a solid aqueous solution of calcium chloride to prepare an eco-friendly liquid snow removing agent (S220)

Here, the additive is the same as the additive mentioned in the embodiment of the present invention, and the additive is added to the solid calcium chloride aqueous solution.

 Table 1 shows the results of the test for the corrosion resistance of the conventional liquid-type liquid snow-removing agent and the conventional liquid calcium chloride after the additives according to the present invention were added to the liquid calcium chloride and absorbed in pearlite.

test item division unit(%) Remarks Forced corrosion Environment-friendly liquid snow remover 15 EL610 Snow Removal Agent [EL610-2008 / 4 / 2012-126]
Liquid calcium chloride 64

As shown in Table 1, it can be seen that the eco-friendly liquid removers according to the present invention are superior to the conventional liquid calcium chloride in terms of forced corrosion.

On the other hand, the test results of the corrosiveness of the eco-friendly liquid snow remover mixed with the additive according to the present invention in a solid calcium chloride aqueous solution are shown in Table 2 below.

additive 5% 10% 20% 30% 40% causticity △ △ ○ ○ ○

Here,? Indicates a little corrosion, and? Indicates a good corrosion prevention.

As shown in Table 2, it can be seen that the eco-friendly liquid snow removing agent to which the additives according to the present invention are added is corrosive.

Table 3 shows the results of the test for the forced corrosion of the environmentally-friendly liquid snow remover mixed with the additive according to the present invention in a solid aqueous solution of calcium chloride and the conventional liquid calcium chloride.

test item division unit(%) Remarks Forced corrosion
Environment-friendly liquid snow remover 26 EL610 Snow Removal Agent [EL610-2008 / 4 / 2012-126]
Liquid calcium chloride 64

As shown in Table 3, it can be seen that the eco-friendly liquid removers mixed with the additive according to the present invention in a solid aqueous solution of calcium chloride are superior to the conventional liquid calcium chloride in terms of forced corrosion.

Table 4 shows test results of the effect of the environmentally-acceptable liquid removers added with the additives according to the present invention and the conventional liquid calcium chloride according to the temperature.

test item division -10 ° C -20 ° C -30 ° C Temperature-dependent freezing effect
Environment-friendly liquid snow remover Good Good Good Liquid calcium chloride Good Good Good

As shown in Table 4, it can be seen that the effect of freezing according to the temperature of the eco-friendly liquid snow remover loaded with the additive according to the present invention is good.

Table 5 shows test results of the effect of the environmentally-friendly liquid snow removing agent containing the additive according to the present invention and the existing liquid calcium chloride on the plants after spreading on the surface of the ground.

test item division Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7
Plant condition
Environment-friendly liquid snow remover Some leaf tax effects recovery Good Good Good Good Good Liquid calcium chloride Wilting Jugsa - - - - -

As shown in Table 5, when the conventional liquid calcium chloride is sprayed on the ground surface, plants are worsened and necrotized with a great adverse effect on the plant condition. However, the environmentally friendly liquid snow removing agent, to which the additives according to the present invention are added, It can be seen that the plant condition is restored immediately without affecting.

As described above, the method of manufacturing the environmentally-friendly liquid snow removing agent using the expanded pearlite and the solid calcium chloride according to the present invention reduces the damage to the corrosive environment and the facility environment, and solves the problem of the transportation and storage of the snow remover due to solidification of the liquid agent product with low energy can do. Also, it is possible to prevent stagnation due to moisture absorption during storage of the snow remover. In addition, when used in the field, the eco-friendly liquid snow remover extracted from expanded pearlite stored by dehydration by centrifugal separation is sprayed to improve the frosting property, and the manufacturing cost can be reduced by recycling the expanded pearlite remaining after the eco- . In addition, when a solid calcium chloride aqueous solution is used as a building material, it is mixed with functional additives in the field and directly sprayed on the road or absorbed by modified pearlite to spread the road, thereby improving the frostability or durability, It can be converted to a snow remover.

Although a solid aqueous solution of calcium chloride is used in the embodiment of the present invention, it is needless to say that a salt aqueous solution may be used.

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various changes, modifications or adjustments to the example will be possible. Therefore, the scope of protection of the present invention should be construed as including all changes, modifications, and adjustments that fall within the spirit of the technical idea of the present invention.

Claims (6)

(S110) of modifying the expanded pearlite by mixing and heating any one selected from the group consisting of marathon, peatmoss, zeolite and vermiculite to the expanded pearlite;
A step (S120) of adding an additive to the liquid calcium chloride to form an eco-friendly liquid snow remover;
Absorbing the environmentally-friendly liquid snow remover into the expanded expanded pearlite (S130);
(S140) packaging, transporting and storing the expanded pearlite absorbed by the environmentally-friendly liquid snow remover; And
Separating the stored expanded pearlite by dewatering by centrifugation (S150); separating the environmentally-friendly liquid snow remover and the expanded pearlite;
The additive based on 100 parts by weight of liquid _{salt, BTA (C 6 H 5 N} 3) 0.1 to 4 parts by _{weight, DAN [(C 6 H 11} ) 2 NH 2] NO 2 0.1 to 4 parts by weight, MEA (C ₂ H ₇ NO), 1 to 4 parts by weight of TEA, up to 500 ppm of Na ₂ NO ₃ , up to 100 ppm of Na ₃ PO ₄ , and up to 500 ppm of Urea. And a process for producing an eco-friendly liquid snow remover using solid phase calcium chloride.
delete delete The method according to claim 1,
Wherein the separated expanded pearlite is recovered and recycled in step S150. The method of claim 1, wherein the expanded pearlite is recovered and recycled.
Preparing an additive (S210); And
(S220) of adding an additive to the aqueous solution of calcium chloride to prepare an eco-friendly liquid snow remover;
The additive is added to the solid calcium chloride aqueous solution;
0.1 to 4 parts by weight of BTA (C ₆ H ₅ N ₃ ), 0.1 to 4 parts by weight of DAN [(C ₆ H ₁₁ ) ² NH ₂ ] NO _{2, and} 0.1 to 4 parts by weight of MEA (C ₆ H ₅ N ₃ ) are added to 100 parts by weight of the solid phase calcium chloride aqueous solution. ₂ H ₇ NO), 1 to 4 parts by weight of TEA, up to 500 ppm of Na ₂ NO ₃ , up to 100 ppm of Na ₃ PO ₄ , and up to 500 ppm of Urea. A method for manufacturing an environmentally friendly liquid snow remover using pearlite and solid calcium chloride. delete

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