KR101764694B1 - Eco-friendly solid-phase deicing agent and a method of producing the same - Google Patents

Abstract

Disclosed are an environment-friendly solid phase deicing agent and a method of producing the same. The environment-friendly solid phase deicing agent has very little effect on automobiles or steel road facilities since the environment-friendly solid phase deicing agent is excellent in reactivity to obtain excellent initial snow removal ability, has good solubility and snow removal ability and excellent durability even at a low temperature of -12 to -15C, and hardly has corrosiveness to metals by utilizing, as a main component, potassium acetate prepared by performing a neutralization reaction of the pure acetic acid with potassium hydroxide after obtaining a predetermined content of pure acetic acid produced by purifying and concentrating the separated acetic acid after separating acetic acid from waste in LCD and semiconductor manufacturing processes without containing calcium chloride at all. Further, the environment-friendly solid phase deicing agent has extremely little environmental effect on street trees or river since the environment-friendly solid phase deicing agent contains organic matters such that the environment-friendly solid phase deicing agent has excellent biodegradability and low toxicity. The method according to the present invention comprises: sieving sat for food additives made in Australia as a starting material for the environment-friendly solid phase deicing agent to sort salt with a size of 3 to 9 mm; injecting a predetermined content of pure acetic acid (CH_3COOH) secured for recycling from industrial wastes into a reactor, and injecting potassium hydroxide together with the pure acetic acid into the reactor; performing a reaction of the pure acetic acid with potassium hydroxide to produce potassium acetate (KCOOCH_3), charging the prepared salt and potassium acetate into a mixer, and injecting an additive together with the prepared salt and potassium acetate into the mixer; mixing the prepared salt and potassium acetate with the additive for a predetermined time until potassium acetate is sufficiently coated on the outer surface of salt and additive at room temperature under the atmospheric pressure; and packing a product in the form of a solid phase deicing agent when mixing of the salt, potassium acetate and additive is finished, and shipping the packed product.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eco-friendly solid phase deicing agent and a method for producing the same,

The present invention relates to an environmentally friendly solid-state snow-removing agent, and more particularly, it does not contain calcium chloride at all. Therefore, the present invention has a slight effect on the surrounding natural environment such as plants and fishes, Since it uses potassium acetate, which is produced by neutralization reaction of pure acetic acid with potassium hydroxide produced by separating acetic acid from the pulpal lactic acid of the process and purifying it by concentration, it has excellent initial melting power (= snow removal ability) and persistence The present invention relates to an eco-friendly solid-phase snow-removing agent having good solubility and a good ice-melting ability even at a low temperature of -12 to -15 캜, and having no scattering during spraying and easy snow removal.

Calcium chloride (CaCl ₂ ), which is sprayed to remove snow on roads and roads in winter, is a chemical substance composed of a ratio of one calcium ion to two chloride ions, as can be seen from the molecular formula. It is solid at room temperature, It is white. Calcium chloride melts well in water even at low temperatures. Because it absorbs moisture contained in the air, it also uses calcium chloride to remove water from the enclosed space or to remove moisture contained in the pure gas. The dehumidifying effect of calcium chloride is far superior to the dehumidifying effect of silica gel, and the effect is good even in a low humidity condition. The calcium chloride sprayed on the road for snow removal absorbs atmospheric moisture with strong absorption of moisture, forming a moist film with water on the road surface. Such a thin layer can catch fine dust on the road and also has the effect of removing dust. In addition, calcium chloride has a high heat of fusion and significantly lowers the freezing temperature of water, thereby exhibiting a strong and immediate freezing prevention effect and a glazing effect.

It is better to use limited amount of calcium chloride as needed when there is a lack of labor force required for snow removal, or when it is not easy to remove snow from the physical force due to road conditions. However, in reality, the amount of calcium chloride is more than necessary due to the urgency of work. It not only corrodes roads, automobiles, steel structures, but also pollutes the roadside by polluting the soil around the roadside, polluting the soil, water quality and even the atmosphere. In other words, calcium chloride is alkalized in the soil, separated into chloride and calcium ions, absorbed into the roots of the plant to increase the ion concentration, and due to its complex action, not only the yellowing phenomenon, early deciduous growth, . The calcium chloride sprayed on the roads accelerates the carcass corrosion of automobiles, especially in cold regions, because chloride ions promote corrosion of steel and iron. In addition, if the temperature drops too much and freezes with water, it becomes a slippery ice layer, which can interfere with the traffic of cars and people.

 In related industries, there have been efforts to develop eco-friendly snow remedies to solve the problems of such calcium chloride-based snow removers.

For example, Korean Patent No. 10-1176574 (registered on August 17, 2012), filed and filed by the present applicant, discloses a solid-phase snow-removing agent having low metal corrosion resistance and being environmentally friendly, 46 to 56 parts by weight of sodium chloride, 15 to 25 parts by weight of calcium chloride, 4 to 6 parts by weight of sodium phosphate, 6 to 10 parts by weight of urea, 5 to 7 parts by weight of sodium acetate, 4 to 6 parts by weight of calcium acetate, And 4 to 6 parts by weight of potassium acetate.

Korean Registered Patent No. 10-1405138 (registered on June 2, 2014), filed and filed by the present applicant, discloses an eco-friendly solid snowmobilizer having a low metal corrosion resistance and formed into granules of a certain size. The composition comprises 40.5 to 56% by weight of calcium chloride, 36 to 51% by weight of sodium chloride, 3.1 to 7.5% by weight of sodium citrate, 0.1 to 0.9% by weight of dicalcium phosphate, 0.2 to 2.5% by weight of sodium acetate and 0.2 to 2.0% And has a granular shape with a diameter of 2 to 5 mm.

 However, since the snow removers disclosed in the above-mentioned patent applications of the present applicant still contain a considerable amount of calcium chloride, they still do not fundamentally solve the problem of calcium chloride that appears when used as a snow remover, and have a drawback that the snow removal effect is relatively inferior.

Next, in Korean Patent No. 10-1596141 (registered on Feb. 15, 2016), a solid fuel made of coke or coal is combusted in a combustion furnace, and at the same time as the combustion, the sulfur component contained in the solid fuel Limestone having a molar ratio (Ca / S) of 1.5 or more is injected into the combustion furnace to desulfurize the sulfided limestone produced by the reaction between limestone and sulfur dioxide in the desulfurization step, and hydrochloric acid is added to the sulfidation- To 1.65 as a stoichiometric ratio of 2-10 times in a batchwise manner to obtain calcium chloride, thereby producing a calcium chloride-based snow remover.

This patent discloses a process for producing sodium carbonate by using calcium carbonate and sodium chloride in a process of obtaining calcium chloride as a byproduct of the process and removing a solid fuel made of coke or coal from a desulfurization process to a sulfidation reaction limestone And then adding hydrochloric acid and reacting to obtain calcium chloride. That is, it is a method of producing calcium chloride more economically and, if necessary, obtaining a solid or liquid snow removing agent. However, as mentioned above, the problem of the snow removing agent containing calcium chloride as a main component is still not fundamentally solved.

In conclusion, considering the social costs of restoration of plants or facilities that have been killed or destroyed by the spraying of calcium chloride, the development of environmentally friendly snow removers has become a necessity rather than an option. There is a growing need to develop eco-friendly snow removers that are manufactured.

Korean Registered Patent No. 10-1176574 (Registration date: August 17, 2012) Korean Registered Patent No. 10-1405138 (registered on June 2, 2014) Korean Registered Patent No. 10-1596141 (Registered Date: Feb. 15, 2016)

Disclosure of the Invention The present invention is directed to a process for purifying and concentrating acetic acid (acetic acid), which is an environmentally friendly organic acid produced by separation from pulp and blend of LCD and semiconductor manufacturing processes, followed by neutralization reaction with potassium hydroxide, (Salt, magnesium chloride, additive), the product is uniformly distributed so that there is no scattering during spraying, and excellent initial reactivity is obtained, It has good solubility and melting power at low temperature and excellent durability. Also, since it does not contain any calcium chloride, it has very little effect on automobile and steel road facilities because it has little corrosiveness to metal. Because of its excellent toxicity and low toxicity, environmental impacts on trees and rivers, Write down is to provide an environmentally friendly solid snow, and the method of manufacturing the same.

According to an aspect of the present invention,

A method for producing an environmentally-friendly solid-state snow-removing agent,

(S1) a step of sorting salt of the Australian formula not containing any harmful chemical substance as a starting material and sorting salt having a diameter of 3 mm to 9 mm;

 (S2) of purifying and concentrating acetic acid obtained by separating, storing and concentrating the waste mixed acid, which is produced as a byproduct of LCD and semiconductor manufacturing processes, to produce a predetermined amount of pure acetic acid;

A step (S3) of adding potassium nitrate (CH ₃ COOH) obtained in the step (S ₂ ) into a reactor, adding potassium hydroxide into the reactor and reacting the reactant to produce potassium acetate (KCOOCH ₃ );

The salt and the potassium acetate prepared through the step (S1) to the step (S3) are charged into a mixer, the additives are added together, and then potassium nitrate is added to the surface of the salt and the additive Mixing for a time (S4); And

(S5) after packaging the product in the form of a solid-phase snow-removing agent upon completion of mixing of salt, potassium acetate and the additive (S5).

In the step (S2), the acetic acid by-product is charged into the concentrator, and then the concentrate is concentrated for 3 hours or more at a temperature of 75 ° C to 115 ° C and a vacuum of 600 to 750 mmHg to produce pure acetic acid in a predetermined amount.

In the step (S3), acetic acid and potassium hydroxide are introduced into the reactor, and then the reaction is carried out at a temperature of about 75 ° C to 115 ° C and a reaction time of at least about 3 hours at atmospheric pressure.

In step S4, magnesium chloride of 45 to 65 parts by weight based on the total weight of the mixture is added as a rusting agent to the mixture, 0.7 to 2.0 parts by weight of sodium hexametaphosphate is added as a corrosion inhibitor, 0.3 to 1.0 parts by weight of sodium citrate, 0.3 to 0.9 parts by weight of glucose, and 0.1 to 0.3 parts by weight of an aqueous solution of apple juice as a biodegradation accelerator and a corrosion inhibitor are put into the flask, 0.001 to 0.003 parts by weight of an edible pigment is added.

The present invention also relates to a method for producing a cement admixture, which comprises mixing 30 to 50 parts by weight of sodium chloride, 45 to 65 parts by weight of magnesium chloride, 1.5 to 4.0 parts by weight of potassium acetate, 0.7 to 2.0 parts by weight of sodium hexametaphosphate, 0.3 to 0.9 parts by weight of glucose, 0.1 to 0.3 parts by weight of an aqueous solution of apple juice, and 0.001 to 0.003 part by weight of a food coloring agent.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to provide a method and apparatus for preventing the environmental and human body, facilities, and the like caused by soil alkalisation, such as roadside damage, water pollution, roadside breakage, shortening of life due to corrosion of vehicles and steel bridges, Acetic acid discharged from the LCD and semiconductor manufacturing process is recycled without any calcium chloride, so potassium acetate is used as a raw material. At the same time, it is used as a raw material in the clean water produced from Australia's clean area and promotes biodegradation and corrosion Environmentally friendly solid organic snowmelt, sodium citrate, glucose, and apple juice aqueous solution. The eco-friendly solid snow removers produced in this way have excellent caustic ratios, excellent initial ice-breaking ability (= snow removal ability) and no scattering during snow removal, It has excellent solubility and melting power even at low temperature of ℃ and is excellent in durability. It has a pH of 6 ~ 9 and its toxicity is weak. Therefore, even if it enters the aqueducts and streams, it has a slight effect on the plants and the surrounding natural environment. %, Which has a slight effect on roads, cars, and facilities. Further, there is an effect that a heavy metal is not detected.

FIG. 1 is a view illustrating a process for manufacturing an environmentally friendly solid snow removers according to a preferred embodiment of the present invention; And
2 is a view showing a process for producing potassium nitrate, which is a main raw material of an eco-friendly solid-phase snow removing agent according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail. Prior to this, terms and words used in the present specification and claims should not be construed as limited to a conventional or dictionary meaning, and the inventor should design the concept of the term appropriately It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, it should be understood that the embodiments described herein are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention, so that various equivalents and modifications may be substituted for them at the time of the present application It should be understood.

As mentioned above, when a large amount of calcium chloride is sprayed to remove snow accumulated on winter roads, it can cause serious damage to roadside trees due to soil alkalization, water pollution, damage to roads, shortening of life due to corrosion of vehicles and steel bridges, The impact on the environment and human body is very large. In order to solve this problem, the related industry manufactures and sells eco-friendly snow removers in various ways, but these snow removers can not be a fundamental solution because they contain calcium chloride only in different contents.

Accordingly, the present invention aims to develop a truly meaningful environmentally friendly snow remover containing no calcium chloride.

Considerations when manufacturing environmentally friendly snow removers include how quickly and intensely the snow and ice can be melted, the degree of corrosion to steel structures, the degree of intimacy with concrete structures, the reduction and deicing at low temperatures Effect, elimination of snow and ice, presence of residues, protection against plants, and economic efficiency. In other words, it is necessary not only to consider merely the price but also to develop a less harmful snow removing agent which can be used with less efficiency, less secondary pollution, less road maintenance costs and less harmful to plants.

The manufacturing process of the environmentally friendly solid snow removers according to the preferred embodiments of the present invention, which has been developed in consideration of these matters, is shown in FIG. 1 and FIG.

First, referring to FIG. 1, a starting material for producing an environmentally-friendly solid snow remover is a starchy salt which does not contain any toxic chemicals, preferably an Australian sun-salt. For this purpose, high-quality salt used as a food additive from Australia is imported, and salt of 3 to 9 mm in diameter is sifted through a sieve (step S1).

Separately from the preparation of sodium chloride, that is to say, salt, acetic acid is separated from industrial wastes, that is, byproducts of LCD and semiconductor manufacturing processes, that is, from waste mixed acid to recycled, purified and concentrated, and then a certain amount of pure acetic acid (CH ₃ COOH ), Thereby producing potassium acetate (KCOOCH ₃ ), which is a main raw material of environmentally friendly solid snow removers according to the preferred embodiments of the present invention.

Since 2005, at least 750,000 tons have been generated annually since 2005, and the recycling rate is about 1.5%, which means that at least 740,000 tons of wasteland is abandoned every year. In the present invention, waste discarded waste is recycled to develop eco-friendly snow removing agent which is free from environmental pollution and corrosion, and is superior in performance to existing snow removing agents and economical.

FIG. 2 shows a process for producing potassium acetate, which is a main raw material of the environmentally-friendly solid snow removers according to the preferred embodiments of the present invention.

Referring to FIG. 2, phosphoric acid is stored by concentrating and concentrating the waste mixed acid, which is produced as a byproduct of the LCD and semiconductor manufacturing processes. Separately, nitric acid and acetic acid are obtained from the intermediate concentrate, And concentrated to produce a certain amount of pure acetic acid. Specifically, the acetic acid by-product is fed into the concentrator and then purified and concentrated at a temperature of about 75 ° C to 115 ° C and a vacuum of 600 to 750 mmHg for about 3 hours or more to produce a certain amount of pure acetic acid (Step S2).

Next, the concentrated acetic acid obtained in step (S2) and the commercially available potassium hydroxide are put into the reactor, and the reaction is carried out at a temperature of about 75 ° C to 115 ° C and a reaction time of at least about 3 hours at atmospheric pressure, produce producing potassium (KCOOCH ₃₎ (step S3). Potassium Acetate is a salt formed by the neutralization of acetic acid and potassium hydroxide, which is a raw material for eco-friendly snow removers. In other words, it has no harmful effect on the soil and has little corrosiveness, and therefore, it becomes the raw material of the snow removing agent suitable for the airport runway.

Potassium acetate is a snow remover introduced in 1991, and as shown in Table 1 below, it is currently used in runways at airports. Table 1 below shows how the different ingredients of each snow remover are used at airports in the United States. Potassium acetate is less than 5 times as much as 50 times more than other pesticide ingredients. Based on this fact, it can be seen that potassium acetate is a competitive snow remover component in terms of performance.

At the US airports Snow remover  Usage survey Pavement Deicer Chemical 2002/2003 Total Surveyed Airport Usage
(tones / year) 2003/2004 Total Surveyed Airport Usage
(tones / year) 2004/2005 Total Surveyed Airport Usage
(tones / year) Average Total Surveyed Airport Usage
(tones / year) Percentage of Chemical Usage Potassium acetate 22,803 20,267 20,029 21,185 65 Propylene glycol-based fluids 3,317 4,147 2,884 3,089 9 Urea (airside) 3,015 3,804 4,031 3,620 11 Sodium acetate 2,815 3,195 2,663 2,888 9 Sodium formate 1,663 694 1,359 1,290 4 Ethylene glycol-based fluids 1,038 465 691 731 2

The salt and potassium acetate prepared through steps (S1) to (S3) are charged into a blender and the additives are added thereto. Thereafter, the potassium and potassium salts are added to the salt and additive outer surface at a predetermined time Lt; / RTI > At this time, since potassium acetate is coated on the outer surface of salt, magnesium chloride and additives, the product is uniformly distributed. As the above-mentioned additive, magnesium chloride of 45 to 65 parts by weight based on the total weight of the mixture is added as a melting agent, 0.7 to 2.0 parts by weight of sodium hexametaphosphate is added as a corrosion inhibitor, and 0.3 to 1.0 part by weight 0.3 to 1.0 part by weight of sodium citrate, 0.3 to 0.9 parts by weight of glucose, and 0.1 to 0.3 parts by weight of an aqueous solution of apple juice are introduced as a biodegradation accelerator and a corrosion inhibitor, and 0.001 to 0.003 part by weight The pigment is injected (step S4).

After the mixing of sodium chloride, potassium acetate and the above additives is completed, the product is packaged in the form of a solid-phase snow-removing agent and shipped (step S5).

The eco-friendly solid snow removers according to the present invention produced through the above-described manufacturing process do not contain any calcium chloride, and in an amount of 30 to 50 parts by weight of sodium chloride, 45 to 65 parts by weight of magnesium chloride 1.5 to 4.0 parts by weight of potassium acetate, 0.7 to 2.0 parts by weight of sodium hexametaphosphate, 0.3 to 1.0 part by weight of sodium metasilicate, 0.3 to 1.0 part by weight of sodium citrate, 0.3 to 0.9 parts by weight of glucose, 0.1 to 0.3 parts by weight of apple juice And 0.001 to 0.003 part by weight of an edible pigment.

In the eco-friendly solid snow removers according to the preferred embodiments of the present invention, the content of sodium chloride is significantly lower than that of the conventional eco-friendly snow removers. In other words, the conventional environmentally-friendly solid-state snow-removing agent contains 94 parts by weight or more of sodium chloride component per 100 parts by weight of the total, and sodium chloride has a constant snowing effect but does not exothermically react like calcium chloride. It is limited. Chloride also has a fatal disadvantage of corroding soil contamination and concrete. In the preferred embodiment of the present invention, the content of sodium chloride is reduced by about 47% to 70% compared to the conventional one. Sodium chloride has advantages of lowering freezing point down to -21 ℃ and lower price compared with calcium chloride. It acts as a melting agent, and it dissolves in water and exerts an endothermic reaction.

Next, potassium acetate, which is a main component of the environment-friendly solid snow removers according to the present invention, acts as a melting enhancer showing the effect of preventing freezing, prevents corrosion of metal materials, and is excellent in the effect of ice-melting. That is, it has a characteristic of a large degree of freezing point drop and a significant decrease in corrosion, thereby increasing the effect of reducing sodium chloride and lowering the corrosiveness.

In addition, potassium acetate has little risk of environmental pollution since acetic acid ions are biodegraded by bacteria and potassium ions are dissolved in water and then used as nutrients of soil organisms.

Test Report 1 below shows the results of the biodegradation test carried out on potassium acetate prepared according to the present invention. As can be seen from the test results, potassium acetate shows a degree of biodegradation of 97%, indicating that the risk of environmental pollution is very small.

Test report 1

In addition, in the conventional snow remover containing calcium chloride, when the amount of calcium chloride is 30 wt% or more, the melting point is -21.5 DEG C, whereas when the amount of calcium acetate in the snow removers of the present invention is 3 wt% The freezing point was -23 ℃. Therefore, it can be seen that potassium acetate is superior in snow removal and deicing ability as compared with calcium chloride.

Potassium acetate has these advantages, but it has been difficult to use due to price problems in the industry. However, in the present invention, since acetic acid (CH ₃ COOH) is recycled from waste mixed acid discharged as waste in LCD and semiconductor manufacturing processes, potassium acetate can be produced and used relatively inexpensively.

Among the additives added together in the mixing process of sodium chloride and potassium acetate, magnesium chloride plays a role of a rusting agent. In the present invention, particulate environmentally friendly magnesium chloride is used. Sodium hexametaphosphate has a colorless or white glass-like property. It is soluble in water to exhibit alkalinity and absorbs moisture to absorb moisture in the air. It exhibits a metal ion blocking action, and therefore is used as a corrosion inhibitor in the present invention. Sodium metasilicate plays a role of spreading agent to spread the raw materials uniformly in the snow removal as well as to prevent melting and corrosion, and since sodium citrate and glucose are biodegraded by bacteria, it plays a role of promoting biodegradation and corrosion inhibitor . The apple juice aqueous solution serves as a biodegradation accelerator and a corrosion inhibitor as natural ingredients.

Test Reports 2 and 3 below show the results of biodegradation tests carried out on glucose and apple juice aqueous solutions added as additives to the environmentally friendly solid snow removers of the present invention. As can be seen from the test results, glucose has a biodegradation rate of 96%, and the aqueous solution of apple juice has a biodegradability of 80%. Therefore, since it is biodegraded naturally after spraying the snow remover, the risk of environmental pollution .

Test report 2

Test report 3

On the other hand, a very small amount of the food coloring agent enables the snow removal efficiency to be visually utilized when the solid snow-reduction agent prepared according to the preferred embodiment of the present invention is sprayed on the snow removal site.

Results and Discussion

As described above, the solid-state snow-removing agent prepared according to the preferred embodiment of the present invention meets the related criteria of the environment-friendly snow-removing agent notified by the Ministry of Environment as shown in Table 2 and Table 3 below.

In general, in order to determine whether snow removers are effective eco-friendly snow removers, it is necessary to determine how low the corrosiveness is through corrosion test of steel, to determine the effect of melting of ice by the measurement of melting volume under sub-zero conditions, The pH of the Korean water quality standard is determined to satisfy 5.8 ~ 8.5.

Environmental standards of environment-friendly snow remedy division EL610 Manufacturing Process Chemicals Do not use as ethylene glycol Item Standard [mg / kg] Moisture drying
content
Hazardous Substances
Lead (Pb)
Arsenic (As)
Cadmium (Cd)
Mercury (Hg)
Chromium (Cr)
Copper (Cu)
Nickel (Ni)
Zinc (Zn) 5 or less
2.5 or less
0.05 or less
0.05 or less
15 or less
20 or less
2.5 or less
Less than 50 Steel corrosion
Relative corrosion after 1 week curing is less than 30% Concrete freezing and thawing
10 cycles related to the effect of freezing and thawing of concrete
Relative loss ratio is less than 50% Biodegradation Organic compounds in constituent materials are easily biodegradable Hazardous Chemical Substance Control Act
Prohibition on the use of substances in the aquatic environment hazard category 1 in accordance with the [Regulations on the Examination of Chemical Hazardous Substances] in accordance with the [Chemical Substance Control Act]. Daphnia toxicity
Toxicity value expressed as EC50 value in acute toxicity test for 48 hours using daphnia 100 mg / L or more

Quality standard of environment-friendly snow remedy division
EL610
Melting effect

※ -3℃~-7℃: 염화나트륨
-12℃~-15℃: 염화나트륨, 염화칼슘 7:3 혼합물
※ 시험시간은 15분, 30분, 60분

※ -3 ℃ ~ -7 ℃: Sodium chloride
-12 ° C to -15 ° C: Sodium chloride, calcium chloride 7: 3 mixture
※ The examination time is 15 minutes, 30 minutes, 60 minutes Granularity
The particle size of the solid snow remover is the weight ratio of the remaining amount after sieving
0% in 13.0 mm sieve, 98% or more in 0.6 mm sieve Water insoluble matter Water insoluble matter in solid snow removers is not more than 1.0%

The standard of the above test method "EL610" is applied to a snow remover which dissolves snow ice by spraying on the road to lower the freezing point by causing chemical reaction or vapor pressure change. In this standard, "melting performance" limits the object to ice to ensure reproducibility in laboratory conditions.

In order to meet the environmental standards and quality standards of eco-friendly snow remediation products notified by the Ministry of Environment to the environment-friendly solid snow removers manufactured according to the present invention, And the researchers carried out the tests from January to March 2017, and the results are shown in the following test reports 4 to 5 , respectively.

Test report 4

The test report 4 is a test report for the sample name "sunflower" produced by the present applicant as a test sample. The sample name "sunflower" was a ratio of sodium chloride and magnesium chloride of 1: 1, Potassium, sodium sodium metasilicate as a corrosion inhibitor, a biodegradation accelerator as a corrosion inhibitor, sodium hexametaphosphate as a corrosion inhibitor, an aqueous solution of sodium citrate, glucose, and apple juice as a corrosion inhibitor, The range is limited.

Here, the test method is EL610: 2015. As can be seen from the test results of Test Report 4 above, the eco-friendly solid snow removers produced according to the present invention have the environmental standards and quality standards of the environmentally friendly snow removers listed in Table 2 and Table 3 It can be seen that it satisfies. In particular, as can be seen from the results of toxicity tests on daphnia, the eco-friendly solid snow removers according to the present invention are excellent in biodegradability and low in toxicity, and thus can be used not only for living creatures in rivers and rivers, There is very little environmental impact.

Test report 5

The Test Report 5 is a test report for the sample name "Sunflower 1" produced by the present applicant as a test sample. The sample name "Sunflower 1" was a mixture of sodium chloride and magnesium chloride in a ratio of 1: 2, Sodium citrate as a corrosion inhibitor, sodium metasilicate as a corrosion inhibitor, a biodegradation accelerator, an aqueous solution of sodium citrate, glucose, an apple juice as a corrosion inhibitor, and an effect of confirming a snow removal efficiency as an anticorrosive agent, And the content defined by the claims.

Here, the test method is EL610: 2015. As can be seen from the test results of Test Report 5 above, the environmentally friendly solid snow removers manufactured according to the present invention have the environmental standards and the quality standards of the environmentally friendly snow removers shown in Table 2 and Table 3 It can be seen that it satisfies. As can be seen from the results of the toxicity test for daphnia, the environmentally-friendly solid snow removers according to the present invention are excellent in biodegradability and low toxicity, so that living organisms such as daphnia , Environmental impacts on nearby plants are extremely low.

As described above, the eco-friendly solid snow removers prepared according to the present invention are excellent in reactivity and have excellent initial fusing power, and have good solubility and fusing power at low temperatures of -12 to -15 캜, and their sustainability is 2 to 3 times It reaches a ship. In addition, since there is little corrosiveness to metals such as iron and aluminum, the influence on automobile and road facilities is very small. In addition, it does not leave residues because it is completely dissolved after spraying in snow removal. Since the aqueous solution of sodium citrate, glucose, and apple juice belonging to the organic matter is included as a biodegradation promoter and a corrosion inhibitor, the biodegradability and the toxicity are low, so that environmental impacts on roadside trees and rivers, that is, plants and fishes, are extremely small. Further, the particles are not solidified and there is almost no dust spillage. In addition, since re-freezing does not occur after snow removal, secondary accidents can be prevented. Finally, since acetic acid discharged from the LCD and semiconductor manufacturing processes is recycled and used as a raw material, potassium acetate is very expensive and the caustic ratio is more than three times that of conventional products.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

S1 to S4:

Claims (5)

A method for producing an environmentally-friendly solid-state snow-removing agent,
(S1) a step of filtering the Australian sun-salt, which does not contain any harmful chemical substances, as a starting material and sorting salt having a diameter of 3 mm to 9 mm;
Acetic acid is separated and stored in a byproduct obtained by separating waste mixed acid, which is produced as a byproduct of LCD and semiconductor manufacturing processes, and then acetic acid byproduct is introduced into the concentrator and then heated at a temperature of 75 ° C to 115 ° C and a vacuum of 600 to 750 mmHg for 3 hours or more Concentrating the tablets to produce a certain amount of pure acetic acid (S2);
Pure acetic acid (CH ₃ COOH) obtained in the above step (S2) is introduced into the reactor and potassium hydroxide is added into the reactor. Then, the reaction is carried out at a temperature of 75 ° C to 115 ° C and atmospheric pressure for 3 hours or more, the step of producing potassium (KCOOCH ₃₎ (S3);
The salt and the potassium acetate prepared through the step (S1) to the step (S3) are charged into a mixer, the additives are added together, and then potassium nitrate is added to the surface of the salt and the additive Mixing for a time (S4); And
After the mixing of the salt and the potassium acetate and the additive is completed, the product is packaged and shipped in the form of a solid-phase snow remover (S5);
By weight based on the total weight of the composition. delete delete The method according to claim 1, wherein in step (S4), 45 to 65 parts by weight of magnesium chloride is added as a melting agent to the total weight of the mixture, 0.7 to 2.0 parts by weight of sodium hexametaphosphate as a corrosion inhibitor 0.3 to 1.0 part by weight of sodium metasilicate as a melting assistant and a corrosion inhibitor are added and 0.3 to 1.0 part by weight of sodium citrate, 0.3 to 0.9 part by weight of glucose and 0.1 to 0.3 parts by weight of an aqueous solution of apple juice as a biodegradation accelerator and a corrosion inhibitor are added By weight based on the total weight of the composition, and 0.001 to 0.003 part by weight of an edible pigment is added as a snow removal efficiency checking agent. An eco-friendly solid-state snow-removing agent produced by the production method of claim 1 or 4,
30 to 50 parts by weight of sodium chloride, 45 to 65 parts by weight of magnesium chloride, 1.5 to 4.0 parts by weight of potassium acetate, 0.7 to 2.0 parts by weight of sodium hexametaphosphate, 0.3 to 1.0 part by weight of sodium metasilicate per 100 parts by weight of the above- 0.3 to 1.0 part by weight of sodium citrate, 0.3 to 0.9 part by weight of glucose, 0.1 to 0.3 part by weight of an aqueous solution of apple juice, and 0.001 to 0.003 part by weight of food coloring matter.

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