KR101561583B1 - Composition to Prevent Dust from Scattering and Method to Prevent Dust from Scattering Using the Same - Google Patents

Abstract

The present invention relates to a dust restrainer composition using citric acid and magnesium, and to a dust restraining method using the same. More specifically, the composition and method do not use calcium chloride and sodium chloride, both causing acidification of soil. Instead, the composition contains, as active ingredients, citric acid and magnesium chloride which are used as food additives. According to the present invention, the present invention has effects of inhibiting production of floating dust without causing soil pollution and soil acidification.

Description

Technical Field [0001] The present invention relates to a dust suppressant composition using citric acid and magnesium chloride, and a dust suppressing method using the same. ≪ Desc / Clms Page number 1 >

The present invention relates to a dust suppressant composition using citric acid and magnesium, and a dust suppressing method using the same. More specifically, the present invention relates to a dust suppressor composition containing citric acid and magnesium chloride as food additives, which do not use sodium chloride and calcium chloride, And a dust suppressing method using the dust suppressing composition.

It is estimated that dust emitted to the atmosphere without a certain outlet is called fugitive dust. Fugitive dust emissions are considered to have a great influence on the amount of fine dust emissions even though they contain many uncertainties.

These fugitive dusts are generated in large quantities on unpaved roads, construction sites and school playgrounds. Accordingly, various methods for suppressing such scattered dust have been proposed.

One of the easiest methods used in the past is to spray water on the uncoated exposed surface to suppress the occurrence of fine dust. However, these technologies require continuous watering with the use of a sprinkler system to maintain and sustain the effect, especially when the relative humidity is low and in dry climates, the water sprinkler and manpower are always in standby and repeated several times a day There was a lot of trouble to do watering work. Excessive water spray increases the water content of the unexposed water surface so that the soil adheres to the tires of the vehicle and the user's running shoes when used as roads, construction sites, and athletic fields. The dry soil adhered to the tire or sneakers, And the like.

In addition, the following prior patents have been disclosed as methods for reducing scattering dust.

First, Korean Patent No. 10-0748156 discloses a 'natural coating agent for scattering prevention'. This technology proposes a composition of a natural coating agent that does not cause noxious gas generation or caloric change in a combustion process even when they are mixed with minerals such as coal by using vegetable oil or animal fat. However, when the vegetable oil and animal oil are used alone, it may cause soil pollution due to the formation of the soil, and the animal stearic acid obtained from Uji, lard, fish oil, butter, etc. may cause odor in the vicinity There is a problem.

Korean Patent No. 10-1407917 discloses an oil gel composition for suppressing scattering dust and a method for producing the same. The technique comprises 0.5 to 35.0% by weight of a nonionic surfactant; 5.0 to 90.0% by weight of oil; And 0.5 to 60.0% by weight of a hydrophilic polymer and a natural polysaccharide polymer. However, since this technique also includes a large amount of oil, there is a problem that odor can be generated around the applied area due to the increase in temperature.

Korean Patent No. 10-1057107 discloses a dust suppressant composition and a dust suppressing method using the same. This technique is an aqueous solution containing 80 to 90% by weight of a divalent metal chloride and 10 to 20% by weight of sodium chloride as an active ingredient and having a concentration of 20 to 40% by weight. However, this prior art patent has a disadvantage in that the use of sodium chloride increases soil salinity and salt accumulation occurs, thereby hindering the growth of plants, causing soil acidification, and causing corrosion of equipment.

In addition, Korean Patent No. 10-0494538 discloses a dust suppressing method and dust suppressing method for suppressing scattering dust on a non-coated ground. This technique has been proposed to be prepared by adding water to magnesium chloride without using sodium chloride and calcium chloride. However, only the composition containing water added to magnesium chloride did not exhibit sufficient dust suppression effect and could not replace sodium chloride and calcium chloride.

KR 10-0748156 B1 KR 10-1407917 B1 KR 10-1057107 B1 KR 10-0494538 B1

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a dust inhibitor composition containing citric acid and magnesium chloride as an effective ingredient for solving the problems of conventional dust suppressing agents.

That is, since the present invention contains only citric acid and magnesium chloride as effective ingredients, it has a remarkably excellent dust prevention effect as compared with the case where only magnesium chloride is used alone. In addition, salt accumulation does not occur as compared with sodium chloride, To prevent acidification of the soil, to cause no corrosion of the equipment, and to prevent contamination and odor of the soil due to formation of the oil film.

To achieve the above object, the present invention provides a dust inhibitor composition using citric acid and magnesium chloride, which comprises 80 to 95% by weight of magnesium chloride and 5 to 20% by weight of citric acid as an active ingredient.

The dust suppressant composition is an aqueous solution having a concentration of 20 to 40% by weight.

The dust suppressing method includes the step of spraying the dust suppressing composition uniformly in an amount of 0.5 to 5 L / m 2 on a surface capable of generating dust.

Spraying the dust suppressant composition uniformly in an amount of 0.5 to 5 L / m 2 on a surface capable of generating dust; stabilizing the sprayed paper for 30 to 90 minutes; To 150 kgf / m < 2 >, and uniformly spraying the dust suppressing composition of claim 2 in an amount of 0.1 to 1 L / m 2 on the surface stabilized by the pressure.

According to the present invention, there is an advantage that the occurrence of arsenic dust can be effectively suppressed without acidification of the soil and contamination of the soil.

In addition, since sodium chloride is not used, there is an advantage that the dust suppressant composition can be used stably without fear of corrosion of equipment.

Hereinafter, the present invention will be described in detail.

The term " dust inhibitor " in this specification means stabilizing dust to prevent scattering of dust.

First of all, the most disadvantage of the conventional dust suppressing agent is to use magnesium chloride or calcium chloride which causes acidification and contamination of the soil, or to form a film on the soil to use oil that causes pollution and odor.

Accordingly, the present invention proposes a stable dust inhibitor composition that does not use sodium chloride or calcium chloride or oils and does not cause acidification or contamination of the soil.

The dust suppressant composition of the present invention is characterized by containing 80 to 95% by weight of magnesium chloride and 5 to 20% by weight of citric acid as an active ingredient. The dust suppressant composition of the present invention can be applied not only to school grounds, but also to construction sites, unpaved roads, tennis courts, and the like.

That is, the dust suppressant composition of the present invention absorbs atmospheric moisture at the ground surface of a playground by spraying with powerful adsorption power when spraying the dust-generating soap scene, and maintains proper moisture to control dust generation, So that dust generation is suppressed.

Further, the dust suppressant composition of the present invention is low in certain points and can be stored in winter, and can be used on dry ground in winter, and additional effects can be achieved as a snow removing agent.

The citric acid and magnesium chloride, which are the main components of the present invention, are stable ingredients as food additives and do not lead to acidification of the soil and corrosion of equipment such as sodium chloride and calcium chloride, There is an advantage not to induce.

More specifically, the magnesium chloride is also referred to as a wastewater, and is used as a medicine for food industry (coagulant of tofu, etc.), and is mainly produced from a decontamination by-product wastewater. Colorless to white crystals, in the form of powders, flakes, pellets, and lumps. Anhydrous crystals are crystals of a colorless hexacyclic system with a specific gravity of 2.177 and a melting point of 708 ° C. The hexahydrate has a specific gravity of 1.569, a loss of 2 water at 100 ° C, a partial release of hydrochloric acid at 110 ° C, decomposition at a high temperature to produce oxymagnesium, . Dissolve well in water and ethanol (dissolve 160 g in 100 ml of water at 20 캜), and the pH of the aqueous solution is 7. That is, the magnesium chloride is less likely to cause acidification and contamination of the soil than the calcium chloride or sodium chloride because the corrosion resistance is as low as one fifth of that of the calcium chloride or sodium chloride. However, since the effect of preventing scattering of the highly corrosive dust is equivalent to that of calcium chloride or sodium chloride to be. However, when only the magnesium chloride is used alone, the soil can not be grafted, and the period of maintaining the humidity in the soil is shortened.

Accordingly, the present invention improves the problem that occurs when magnesium chloride is used alone by using citric acid together with the magnesium chloride.

The citric acid is one of multi-group carboxylic acids having a hydroxyl group (-OH). When crystallized in water, a large columnar crystal having one molecule of crystals is formed. When heated, it becomes an anhydride (anhydride), which has a melting point of 153 ° C. When the temperature is further raised, it becomes aconitic acid at 175 ° C. At high temperature, it produces an anhydride of acetic anhydride or citraconic acid anhydride and acetone dicarboxylic acid. It is well soluble in water and ethanol. When a microorganism is cultured using a saccharide as a substrate, citric acid accumulates in the culture liquid. This is called citric acid fermentation. Several cultivation methods have been studied and now 90% of the total amount of citric acid produced in the world is produced by this fermentation process. Citric acid is usually obtained by fermentation at acidic (pH 2 ~ 3) at about 30 ℃ for 7 ~ 10 days.

These citric acid is often used as a sterilizing disinfectant and is a stable ingredient. It stabilizes the ground by stabilizing the soil by grafting the soil when it is applied to the soil. In addition, it is combined with insolubilized phosphoric acid, iron, and calcium in the soil to convert it into a form that plants can use, stimulates useful microorganisms in the soil, promotes growth, and promotes organic fermentation. give.

Therefore, when magnesium chloride and citric acid are contained as an active ingredient, they absorb moisture in the atmosphere due to their deliquescence, stabilize the soil due to soil entanglement, and extend the humidity maintenance period to prevent dust from scattering.

In the present invention, it is preferable that the magnesium chloride is contained in an amount of 80 to 95% by weight and citric acid in an amount of 5 to 20% by weight. If the concentration is outside this range, magnesium chloride and citric acid do not act in harmony, This is because there is a drawback that the effect of the reduction is deteriorated.

In addition, it is preferable that the dust suppressant composition of the present invention is used in the form of an aqueous solution having a concentration of 20 to 40% by weight. If the concentration is too low, the effect of preventing scattering of dust is deteriorated. It is not economical because it has no effect.

Hereinafter, a method of suppressing dust using the above composition is provided.

The dust suppression method according to the present invention includes the step of uniformly spraying the above composition on a surface capable of generating dust in an amount of 0.5 to 5 L / m 2. That is, the present invention has an excellent dust suppression effect by simply spraying the composition on the ground.

According to a preferred embodiment of the present invention, the ground capable of generating the dust is a playground, a tennis court, a construction site, or a construction site corridor.

The spraying of the dust suppressant composition of the present invention can use a variety of sprayers, sprayers or water spraying vehicles known in the art, and preferably spraying vehicles equipped with spray nozzles.

Preferably, the dust suppressant composition is uniformly applied to the ground, and then the ground is stabilized for 30 to 90 minutes so that the dust suppressant composition is absorbed to the ground, and the stabilized ground is pressed at a pressure of 50 to 150 kgf / , And then the above-mentioned composition is secondarily sprayed in an amount of 0.1 to 1 L / m < 2 >.

The reason for stabilizing the ground for 30 to 90 minutes so that the dust suppressant composition is absorbed to the ground is to give the dust suppressant composition time to absorb water in the atmosphere and react with the soil to join the soil.

The stabilized ground is further stabilized at a pressure of 50 to 150 kgf / m < 2 > in order to prevent dust from scattering on the ground. Here, as a device for applying physical pressure to the paper, various rollers or vibrating rollers known in the art can be used. If the physical pressure is less than 50 kgf / m 2, physical pressure is applied to increase the paper surface The effect is weak, and when the pressure of 150 kgf / m < 2 > is exceeded, the paper becomes too hard.

Further, by further spraying the above dust suppressant composition on the further stabilized paper surface, generation of dust is further suppressed.

As described above, according to the dust suppressing composition and the dust suppressing method of the present invention, it is sprayed on a ground capable of generating dust to join the soil and absorb moisture in the air to increase the humidity of the soil, thereby preventing soil scattering . The dust suppressing composition and the dust suppressing method of the present invention continue to be effective for about 6 to 12 months after the application, so that the cost of dust suppression can also be reduced.

Furthermore, the dust suppressant composition of the present invention is stable because it does not use sodium chloride and calcium chloride which induce acidification of soil and corrosion of equipment, and it does not use oils which cause a pollution and odor by forming a film on the soil. It is the biggest feature that can be said.

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not to be construed as limiting the scope of the present invention. It will be self-evident.

Example

Preparation Example 1: Preparation of a dust inhibitor composition.

The components shown in Table 1 were weighed and weighed, and then mixed with water in the composition shown in Table 2 below. The mixture was stirred until a homogeneous solution having no residue was prepared, thereby preparing a dust inhibitor composition.

(% By weight) of Examples 1, 2 and 3, ingredient Example 1 Example 2 Example 3 Magnesium chloride 80 90 95 Citric acid 20 10 5 Sum 100 100 100

Component contents (% by weight) of Examples 4 to 9 ingredient Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 1 20 40 - - - - Example 2 - - 20 40 - - Example 3 - - - - 20 40 water 80 60 80 60 80 60 Sum 100 100 100 100 100 100

Experimental Example 1: Measurement of Freezing Point of Dust Inhibitor Composition.

The freezing points of Examples 4 to 9 in Table 2 were measured according to ASTM D 1177 (antifreeze freezing point test method). The measurement procedure is summarized as follows. First, acetone or methanol is added to the cooling bath, and then dry ice is added thereto to prepare a cooling liquid. Then, 75-100 ml of the composition of Examples 5 and 6 is put in a cooling tube and the temperature is measured with a cork Respectively. The cooling tube was placed in the cooling liquid and cooling was started, and the stirrer was poured up and down at a rate of 60-80 times per minute until the end of the measurement. The freezing point measurement results are summarized in Table 3 below.

Results of Experimental Example 1 division Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Freezing Point (℃) -20 -55 -22 -57 -23 -58

As can be seen from the above Table 3, the embodiments of the present invention were found to be somewhat low and thus easy to use in winter.

Experimental Example 2: Determination of deliquescence of Examples 1 to 3

The deliquescence of the samples of Examples 1 to 3 was measured. The deliquescence was measured by putting 2 g of the solution in a 30 ml transparent plastic container having a top opening and keeping it in a space having a relative humidity of 82% for 7 days. The absorbed water in the container was poured into a measurement container labeled in ml to measure the amount of absorbed water.

The results are shown in Table 4 below.

Results of Experimental Example 2 division Example 1 Example 2 Example 3 result 1.6 1.8 1.9

As shown in Table 4, the examples of the present invention confirm that the deliquescence is excellent.

Experimental Example 3: Moisture retention test

The dust inhibitor compositions of Examples 6 and 7 of the present invention and the dust inhibitor compositions of Comparative Examples 1, 2, and 3 were sprayed with about 10 L of sprayer in a space of about 5 m 2 And the results are shown in Table 5.

The dust inhibitor composition of Comparative Example 1 was prepared with an aqueous solution having a concentration of 20% by weight using only magnesium chloride, and the composition of Comparative Example 2 was prepared with an aqueous solution having a concentration of 40% using only magnesium chloride. The composition of Comparative Example 3 was composed of sodium chloride 25% by weight, magnesium chloride 15% by weight and calcium chloride 60% by weight was prepared as a 30% aqueous solution.

Results of Experimental Example 3. division Example 6 Example 7 Comparative Example 1 Comparative Example 2 Comparative Example 3 Moisture maintenance period 13th 15th 9th 3 days 13th

As can be seen from the above Table 5, the composition of the present invention is remarkably excellent in the moisture retention effect as compared with Comparative Examples 1 and 2 using magnesium chloride alone, and is similar to Comparative Example 3 in which sodium chloride, calcium chloride and magnesium chloride are used together And the results are shown.

Experimental Example 4: Dust Suppression Experiment.

Approximately 60 L of the dust suppressant compositions of Examples 6 and 7 and Comparative Examples 1 to 3 were sprayed on a school playground (width 3 mx length 10 m) where a lot of dust was blown using a spraying vehicle equipped with spray nozzles, After the day, moisture was measured according to the manufacturer's protocol using a soil moisture meter (GMK-770S, sold by Chosun Instruments) to confirm the effect of suppressing the dust before and after the spraying. The results are summarized in Table 6 below: The measurement was performed by injecting the sensor at a depth of 20 mm. The moisture content exceeded 25%: humid, dry soil moisture 20-25%: slightly dry, dry soil moisture 12-20%: dry, dry soil moisture less than 12% Respectively.

Results of Experimental Example 4. division Before spraying Example 6 Example 7 Comparative Example 1 Comparative Example 2 Comparative Example 3 Dry soil moisture (%) 11 28 29 21 18 28 Whether it is dry Very dry Low Low Slightly dry dry Low

As can be seen from the above Table 6, the composition of the present invention was superior in dust suppression effect to that of Comparative Examples 1 and 2, and showed a similar level to that of Comparative Example 3.

In addition, the components of the soil sprayed with the dust suppressant composition of the present invention were analyzed and it was confirmed that this sample satisfied the soil pollution concern criteria and countermeasure criteria based on the soil environmental conservation method.

Therefore, it was confirmed that even if sodium chloride and calcium chloride adversely affecting the soil are not used, the effect of the present invention is comparable to that of sodium chloride and calcium chloride, so that sodium chloride and calcium chloride can be substituted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

Claims (4)

delete 80 to 95% by weight of magnesium chloride and 5 to 20% by weight of citric acid as active ingredients,
And the concentration is 20 to 40% by weight.
delete Spraying the dust suppressant composition of claim 2 uniformly in an amount of 0.5 to 5 L / m 2 on a surface capable of generating dust,
Stabilizing the spread paper for 30 to 90 minutes,
Stabilizing the stabilized paper at a pressure of 50 to 150 kgf / m < 2 >
And uniformly spraying the dust suppressing composition of claim 2 in an amount of 0.1 to 1 L / m 2 to the ground stabilized by the pressure.