Grain mixture for melting snow and ice

FIELD: materials for miscellaneous applications.

SUBSTANCE: grain mixture comprise, in mass %, 15-45% of compressed first salt of alkaline or alkaline-earth metal and 85-55% of the second salt of alkaline or alkaline-earth metal. The first salt is a waterless hygroscopic salt.

EFFECT: reduced cost.

14 cl, 4 dwg

 

The scope of the invention

The present invention generally relates to the granules to melt accumulated snow and ice on surfaces such as streets, Parking areas, sidewalks, etc. and, more specifically, relates to the granules obtained from the compacted mixtures of salts of alkaline and/or alkaline earth metal, and to methods for producing such granules.

Background of the invention

Previously known products for melting snow and ice include hygroscopic salts such as calcium chloride and magnesium chloride, rock salt (sodium chloride), fertilizers such as potassium chloride and urea, a mixture of several salts and non-slip aggregates, such as sand, slag, and calcined adsorbent of hard-shelled land.

Such previously known products, which are not capable of melting snow and ice in their solid form, must first form a solid solution or brine. The brine is used to lower the freezing point of water and to dissolve or melt the snow and ice when contact is made within such time that it becomes diluted to a concentration at which its freezing temperature rises to the temperature of freezing water.

As should be readily understandable to experts, the speed or effectiveness of such previously known products depends in part on the time required for images is of brine. In order to reduce the transformation time of the brine, hygroscopic salts (e.g. calcium chloride, magnesium chloride) were United, for example, with sodium chloride and/or potassium chloride and urea. Such previously known mixtures of salts were prepared in the form of dry mixtures and agglomerates. Such mixtures are also prepared by spraying a liquid solution of calcium chloride and/or magnesium chloride in solid sodium chloride crystals.

Dry mixtures of salts, including calcium chloride and sodium chloride, tend to be the least efficient products from the salt mixtures separation of these components during transport. As is well known, calcium chloride has a large exothermic effect dissolution, whereas the sodium chloride has an endothermic heat effect dissolution. If so, the dissolution of sodium chloride will only occur with the absorption of heat and therefore is dependent on the heat generated by the dissolution of calcium chloride. If these components are not in direct contact, the rate of dissolution of sodium chloride decreases, making the mixture less effective.

The crystals of sodium chloride and agglomerated mixture of salts coated mentioned above, typically do not contain sufficient quantities of calcium chloride and/or magnesium chloride in order to achieve an acceptable speed solution the Deposit or cause complete dissolution of the sodium chloride crystals.

Among the attempts of previous practice to improve the efficiency of the products for melting snow and ice was granulated product made from compressed 50/50 mixture of calcium chloride and sodium chloride. It was reported that the mix was produced using granules of anhydrous calcium chloride (94% CaCl2//4% other salts//2% H2O) and particles of 100 mesh sodium chloride (92% NaCl//8% 38% (wt.) solution of CaCl2). The total amount of free water in the granules of anhydrous calcium chloride and calcium chloride was 2%.

Although this granular product contained a sufficient amount of calcium chloride to cause dissolution of the sodium chloride component with an acceptable speed of dissolution, it is expensive to manufacture and is easily converted into powder when subjected to mechanical stress during transport and storage.

Accordingly, the main aim of the present invention is to eliminate the above-noted disadvantages of the prior art.

More specifically, the purpose of the present invention is the provision of granules to melt accumulated snow and ice, which have improved mechanical properties, being less expensive to manufacture.

Another objective of the present invention is the provision of a method of preparation of granules for establishinga and ice, which is effective and efficient and serves to improve the mechanical properties of the final granulated composition.

Another objective of the present invention is the provision of granules produced in accordance with the method described here.

Brief description of the invention

The present invention therefore offers the granules to melt accumulated snow and ice, made from a compressed mixture of salts of alkaline and/or alkaline earth metals, where the mixture comprises from about 15 to about 45% by dry weight calculated on the total dry weight of the pressed mixture of the first salts of alkaline or alkaline-earth metal and from about 85 to about 55% by dry weight calculated on the total dry weight of the pressed mixture of the second salt of alkali or alkaline earth metal, where at least the first salt is a hygroscopic salt, and where the sum of the components is 100% dry matter.

The present invention also provides a method of producing such granules, which includes:

(a) mixing at least two salts of alkaline and/or alkaline earth metals, where the first salt is an anhydrous hygroscopic salt, and where the second salt is in the form of saturated salt solution with a content of free water in the range of from about 6 to about 10% wt. in calc is the total mass of a saturated salt solution;

(b) compressing the mixture, and

(c) granulating the pressed mixture.

The present invention further proposes granules to melt snow and ice, made according to the method described just before.

The above and other features and advantages of the present invention will be clearer from the following description and the accompanying drawings.

Unless otherwise specified, all technical and scientific terms used herein have the same meaning, which is usually easily understood by a typical specialist to whom addressed this invention. Everything mentioned here publications, patent applications, patents, and other sources are included in the description by reference in its entirety. In case of conflict, the present application, including definitions, will be decisive. In addition, the materials, methods and examples are illustrative only and should not be construed as restrictive.

Brief description of drawings

Figure 1 is a schematic process flow diagram describing the main features of the method for the manufacture of one example of the granules to melt accumulated snow and ice according to the present invention.

Figure 2 is a cross-sectional, side view of a preferred variant implementation of the mixer/reactor used for of the otopleniya one example of the granules to melt accumulated snow and ice according to the present invention.

Figure 3 is a graph describing the fusing ability of the preferred embodiment of the present invention and several previously known products.

Figure 4 is a diagram penetration of ice for the preferred alternative implementation of the present invention and several previously known products.

A detailed description of the preferred option exercise

Granules to melt accumulated snow and ice according to the present invention have improved mechanical properties in and of themselves are not easily crushed to powder when subjected to mechanical stress during transport and storage. The granules according to the invention are effective at temperatures as low as -20°With, and penetrate through the ice to the underlying surfaces than some previously known defrosters. In addition, preliminary studies have shown that the granules may initially act as abrasives, reducing the risk of contact with surfaces covered with ice or snow.

In General, the granules to melt accumulated snow and ice according to the invention is prepared from a compacted mixture of at least two salts of alkaline and/or alkaline earth metals. More specifically, the granules according to the invention is prepared from a compacted mixture comprising from approx the RNO 15 to about 45% by dry weight calculated on the total dry weight of the pressed mixture of the first salts of alkaline or alkaline-earth metal and from about 85 to about 55% by dry weight calculated on the total dry weight pressed a mixture of the second salt of alkali or alkaline earth metal, where at least the first salt is a hygroscopic salt, and where the sum of the components is 100% dry matter. As mentioned above, the present invention was used one or more hygroscopic salts in order to facilitate the formation of liquid brine.

By the present invention it was found that for compacted granular salt calcium chloride/sodium chloride calcium chloride component must be present in an amount greater than 15% or equal to 15% calculated on the total dry weight of the pressed mixture, in order to cause rapid and complete dissolution of the sodium chloride component. As should be easily understood, relatively low amount of calcium chloride used in granular mixtures according to the invention make such mixtures are more efficient or profitable.

Preferably salts of alkali and alkaline earth metals are a halide salt selected from the group comprising calcium chloride, magnesium chloride, potassium chloride and sodium chloride. More preferably, the first salt is alkaline and/or alkaline earth metal chosen from the group comprising calcium chloride and magnesium chloride, while the second salt is alkaline and/or alkaline earth metal chosen from the group VK is causa potassium chloride and sodium chloride.

In an even more preferred embodiment, the granules to melt accumulated snow and ice according to the present invention is prepared from a compacted mixture comprising from about 20 to about 25% by dry weight (most preferably from about 20 to about 22% by dry weight) calculated on the total dry weight of the pressed mixture of calcium chloride and from about 80 to about 75% by dry weight (most preferably from about 80 to about 78% by dry weight) calculated on the total dry weight of the pressed mixture of sodium chloride.

In the most preferred embodiment of the invention the proposed pellets are made from compacted mixture containing 21% by dry weight calculated on the total weight of the pressed mixture of anhydrous calcium chloride and 79% by dry weight calculated on the total dry weight of the pressed mixture of sodium chloride.

Granules to melt accumulated snow and ice according to the invention can with a beneficial effect to contain other additives, provided that any such additives do not render harmful influence on the desired properties of the granules. For example, the granules according to the invention can contain absorbents, abrasives, agents, prevent caking, dyes, corrosion inhibitors, preservatives and/or surfactants.

In a preferred embodiment of the present izopet is of pellets containing an effective amount of one or more corrosion inhibitors. Suitable corrosion inhibitors include, but are not limited to, monolatrist phosphate, sodium nitrate and mixtures thereof.

In an even more preferred embodiment, pellets made from compressed mixture comprising from about 15 to about 45% by dry weight (more preferably from about 20 to about 25% by dry weight) calculated on the total dry weight of the pressed mixture of calcium chloride, from about 55 to about 85% by dry weight (more preferably from about 75 to about 80% by dry weight) calculated on the total dry weight of the pressed mixture of sodium chloride and from about 1.0 to about 3.0 percent by dry weight (more preferably from about 1.15 to roughly 2.0 by dry weight) calculated on the total dry weight of the pressed mixture of monetarypolicy.

In the most preferred embodiment of the invention the pellets are made from compacted mixtures containing 21.7% dry weight to total dry weight of the pressed mixture of anhydrous calcium chloride, 76.7 percent by dry weight calculated on the total dry weight of the pressed mixture of sodium chloride and 1.6% by dry weight calculated on the total dry weight of the pressed mixture of monetarypolicy.

The average particle size of the granules according to the invention preferably lies in the range of from about 2 to about 10 mm (more preferably from the example is about 2 to about 8 mm), while the bulk density is preferably lies in the range from approximately 0.88 to about 1.04 g/cm3.

Granules to melt accumulated snow and ice according to the present invention is prepared by mixing salts of alkaline and/or alkaline earth metals, molding the mixture and granulating the pressed mixture. More specifically, the granules according to the invention are prepared:

(a) mixing at least two salts of alkaline and/or alkaline earth metals, where the first salt is an anhydrous hygroscopic salt, and where the second salt is in the form of saturated salt solution having a content of free water in the range of from about 6 to about 10% wt. (preferably from about 6 to about 7% wt.) calculated on the total weight of the saturated salt solution;

(b) compressing the mixture, and

(c) granulating the pressed mixture.

The term "content of free water"as it is used here, means the total amount of unbound water present in the solution, and it is determined in accordance with the standard test method. The American Society for Testing and Materials (ASTM), No. E203-01.

By the present invention discovered that a mixture prepared from saturated salt solutions having a content of free water from about 6 to about 10% wt. calculated on the total weight of saturated salawag the solution, had the best compaction, resulting in firmer and more impact-resistant granules. With specific regard to mixtures of calcium chloride/sodium chloride, such mixtures should contain 20% by dry weight, or more, calculated on the total dry weight of the mixture of calcium chloride (dihydrate), which provides the linking components, leading to improved sealability and result in a more solid granules. However, a mixture prepared from saturated salt solutions having a content of free water is more than 10 wt.%, tend to form granules, which are less effective from the standpoint of melting snow and ice, whereas granules containing less than 3% wt. free water, tend to form granules having low resistance.

In a preferred embodiment, the granules are prepared by mixing the calcium chloride in the form of particles with a saturated solution of sodium chloride, molding the mixture and granulating the pressed mixture. In accordance with this preferred embodiment and as best shown in figure 1, the calcium chloride in the form of particles and a saturated solution of sodium chloride send along the lines of the metered streams 10, 12 in the mixer/reactor 14 and is stirred or shaken at ambient temperature or room temperature (i.e. from about 20 up to the ome 25° (C) during the period of time from about 20 to about 30 minutes.

The term "a saturated solution", as used here, means a solution containing at least about 26% by weight. of calcium chloride calculated on the total weight of the solution.

During the stage of mixing in the mixer/reactor 14 can be introduced additives such as dyes, corrosion inhibitors) along the line of feed stream 16.

In a more preferred embodiment, aqueous suspensions or solutions of such additives sprayed on the mixture in the mixer/reactor 14 by using, for example, the spray nozzle.

In an even more preferred embodiment, an aqueous solution containing from about 19 to about 38 wt.%. calculated on the total weight of the aqueous solution of monetarypolicy add to the mixer/reactor 14 along the line of feed stream 16.

After the stage of mixing the mixture contained in the mixer/reactor 14, is directed through line 18 in press roller 20 (for example, in a press equipped with a smooth or ribbed rollers), which makes the mixture into a sheet. Preferably the pressure rollers in the press 20, does not exceed 13.1 MPa. Molded sheet is directed along the line 22 in Drautal/granulator 24, which crushes and razmarivaet sheet in the granulated product. Note that the press roller 20 and Drautal/granulator 24 can in order to be included in one item of equipment, what stage of pressing and crushing/grinding are carried out sequentially, but in one device.

The granular product is formed in drobile-granulator 24, is directed through line 26 into the sieve 28 (e.g., vibrating sieve), which contains a series of sieves. The granular product is separated into a fraction of a larger size, the product fraction and the fraction of smaller size, i.e. a small thing. The fraction of larger size are removed through line 30 and is served in recycling in the granulator 32 for additional size reduction. Can be used as a second, separate granulator. Then the fraction of reduced size guide lines 34 and 26 in the sieve 28. The fraction of smaller size served in recycling lines 36 and 18 in press 20. The product fraction is directed to the packaging line 38. The granulated mixture of calcium chloride/sodium chloride or calcium chloride/sodium chloride/monolatrist output of a bolt 28 in the quality of the product has an average particle size in the range of from about 2 to about 10 mm (preferably from about 2 to about 8 mm) and preferably stored in a cool, dry place.

In a more preferred embodiment, shown in figure 2, the mixer/reactor 14 includes: (a) a cylindrical casing 40; (b) a shaft 42, which is driven by a motor and gearbox (not shown) and the rotation is of which is supported by bearings 44; and (C) the number of elements or mixing blades 46, which is attached to the shaft 42 radially spaced elements 48.

Ingredients injected into the mixer/reactor 14 through inlet port 50, while additives such as dyes, corrosion inhibitors) can be injected into the mixer/reactor 14 when using the spray nozzle 52. The mixer/reactor 14 is inclined (for example, on 10° from the horizontal axis), allowing the mixture to move under gravity to the outlet fitting 54.

As indicated above, the granules to melt accumulated snow and ice according to the present invention have improved mechanical properties. The granules according to the invention are solid and shock-resistant and not easily crushed to powder when subjected to mechanical stress during transport and storage.

When comparing the granules according to the invention with salts of chlorides of sodium, calcium and magnesium granules according to the invention showed the best full fusing ability. More specifically, figure 3 is a diagram describing the fusing ability of the preferred alternative implementation of the present invention (designated as HKNH), sodium chloride, 98% of calcium chloride 77% calcium chloride and hydrated magnesium chloride. The term "melting capacity" means the number of grams of melted ice per gram about the ukta at varying temperatures (shown on the horizontal axis) for 30 minutes.

For this test distilled water was boiled, cooled and then placed in a Plexiglas cell with vertical walls, each cell had a total surface area of 230 cm2. Then the cuvette was placed in the freezer for 15 hours, was taken out and the ice surface in each cell was aligned contact surface with aluminum disc using a circular motion. Then the cuvette was returned to the freezer to re-freeze any surface water. Then they measured and cooled sample of 1.0 g of each test sample. The cuvette was removed from the freezer and measured and cooled the samples evenly distributed over the ice in cuvettes, each cuvette contained a different test sample. The mass and volume of melted ice that is present in every cell, was measured at intervals of 15, 30, 45, 60 and 120 minutes. As shown in figure 3, the granules to melt accumulated snow and ice according to the present invention have a higher full fusing ability than the other tested products, at lower temperatures.

Figure 4 is a chart showing the penetration of the ice for 60 minutes to pellet according to the invention and for the chloride salts of sodium, calcium and magnesium, which have been described above. The term "penetration of ice" means the depth of penetration of the product placed on a surface is of the ice filled cavity.

For this test used a device that contains many vertical cavities with a diameter of 6 mm Distilled water was boiled, cooled and then an equal number was introduced by syringe into each cavity of each device. Then the device was placed in the freezer and the water froze without air bubbles. After freezing the so-called "ice cap", which was formed on the surface of each cavity were removed using an aluminum plate, and the device for one hour and returned to the freezer. Then they measured and cooled a portion of 0.04 g of each test substance. Devices were removed from the freezer and measured and cooled the samples were placed on kept them in the ice, and each cavity contains different subject sample. The depth of penetration caused by each test sample was measured in intervals of 15, 30, 45, 60 and 120 minutes. If there was non-uniform penetration, measured maximum/minimum values and recorded an average value. As shown in figure 4, the granules to melt accumulated snow and ice according to the present invention showed either increased penetration of ice, or the same penetration compared with other products.

The granules according to the invention, as noted above, preferably used one or more inhibitors of RAS is Ziya, uniformly distributed on each granule. There are a number of corrosion tests developed by such organizations as the American Society for Testing and Materials (ASTM) and the National Association of Corrosion Engineers (NACE). These tests can be quite complex due to the fact that the test conditions and the metals should be close to those that exist in practice.

The corrosion tests were performed with the granules to melt accumulated snow and ice according to the present invention in accordance with standard NACE Standard TM-01-69 (1976 revision), modified Pacific Northwest States (PNS). PNS modified the methodology of this test corrosion so that the testing method used 30 ml of 3% solution of the test product (or brine) per square inch surface area of the metal sample.

Corrosion inhibited products for melting snow and ice to be acceptable according to the standard NACE, must have a value of corrosion, at least 70% less than that of sodium chloride. Therefore, if the corrosion rate for dilute salt solutions (3% wt.) for metals based on the iron ranges from 17 to 50 mils per year (MPY), the acceptable standard for corrosion resistant product for melting snow and ice must be between 5,10 and 15.00 MPY.

In accordance with the above method of testing metal samples or coupons were cleaned, dried and weighed. Then to pony alternately immersed in a solution of brine (10 minutes) and were removed from the brine solution and kept in air (50 minutes) within 72 hours. Next, the coupons were examined and weighed in order to determine how much metal has been lost or corroded. Coupons were a1/2inch flat plate of mild steel (approximately 1,38 inches×0.56 inches×0.11 inch), having a density of about a 7.85 g/cm3.

The results of corrosion tests obtained for pellets to melt accumulated snow and ice of the present invention, showed a corrosion rate which is less than or equal to 10 MPY, preferably less than or equal to 8 MPY. As can be easily understood, the granules according to the invention must be in contact with the road and, therefore, transport, and, therefore, a low rate of corrosion is extremely beneficial and desirable.

Although this invention has been presented and described in relation to its specific implementation options, specialists should understand that various changes in form and details may be made without deviating from the spirit of the claimed invention.

Proceeding from the described thus of the invention, applicants offer the following claims.

1. The compressed mixture of salts of alkaline and/or alkaline earth metals for the manufacture of granules for melting snow and ice, where the mixture is prepared using from about 15 to about 45% by dry weight in the region of the invoice for the total dry weight of the pressed mixture of the first salts of alkaline or alkaline-earth metal and from about 85 to about 55% by dry weight calculated on the total dry weight of the pressed mixture of the second salt or alkaline alkaline earth metal, where at least the first salt is an anhydrous hygroscopic salt.

2. The compressed mixture according to claim 1, where the first salt selected from the group consisting of anhydrous calcium chloride and anhydrous magnesium chloride, and where the second salt selected from the group consisting of potassium chloride and sodium chloride.

3. The compressed mixture according to claim 2, where the first salt is anhydrous calcium chloride, and where the second salt is sodium chloride.

4. The compressed mixture according to claim 1 where the effective amount of one or more corrosion inhibitors is additionally used in the preparation of the pressed mixture.

5. The compressed mixture according to claim 4, where one or more corrosion inhibitors are selected from the group consisting of monetarypolicy, monoammonium phosphate, sodium nitrate and mixtures thereof.

6. The compressed mixture according to claim 5, where one or more corrosion inhibitors are monolatrist.

7. Granules to melt accumulated snow and ice, made from a compressed mixture of salts of alkaline and/or alkaline earth metals, where the mixture comprises from about 15 to about 45% by dry weight calculated on the total dry weight of the pressed mixture of the first salts of alkaline or alkaline-earth metal and from about 85 to about 55% by dry weight calculated on the total dry weight of spressovanne the th second mixture of salts of alkaline or alkaline earth metal, where at least the first salt is an anhydrous hygroscopic salt.

8. Granules to melt accumulated snow and ice according to claim 7, where an effective amount of one or more corrosion inhibitors is additionally used in the preparation of the pressed mixture.

9. Granules to melt accumulated snow and ice of claim 8, which show the corrosion rate less than or equal to 10 mil/year when tested according to NACE Standard TM-01-69 (revised edition 1976), modification of PNS.

10. Granules to melt accumulated snow and ice according to claim 9, which show the corrosion rate less than or equal to 8 mil/year when tested according to NACE Standard TM-01-69 (revised edition 1976), modification of PNS.

11. A method of manufacturing granules to melt accumulated snow and ice, which includes

(a) mixing at least two salts of alkaline and/or alkaline earth metals and, optionally, one or more corrosion inhibitors, where the first salt is an anhydrous hygroscopic salt;

(b) compressing the mixture, and

(C) granulating the pressed mixture.

12. The method according to claim 11, in which one or more corrosion inhibitors selected from the group consisting of monetarypolicy, monoammonium phosphate, sodium nitrate and mixtures thereof, is mixed with at least two salts of alkali and/or alkaline earth metal.

13. JV the property indicated in paragraph 12, in which one or more corrosion inhibitors are monolatrist.

14. Granules to melt accumulated snow and ice made

(a) mixing from about 15 to about 45% by dry weight calculated on the total dry weight of the pressed mixture of the first salts of alkaline or alkaline-earth metal, from about 85 to about 55% by dry weight calculated on the total dry weight of the pressed mixture of the second salt of alkali or alkaline earth metal and, optionally, an effective amount of one or more corrosion inhibitors, where at least the first salt is an anhydrous hygroscopic salt;

(b) compressing the mixture, and

(c) granulating the pressed mixture.



 

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4 cl, 4 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. The method of producing granular potassium chloride involves structural agglomeration of filtered potassium chloride in a turbo blade mixer-granulator, drying and pressing the agglomerated product, grinding the pressed product and sizing the ground product. Structural agglomeration of the potassium chloride is carried out together with fine sizes of the granulation stream obtained after sizing the ground pressed product with the load on the turbo blade mixer-granulator not less than 400 t/m2 of its cross section. The agglomeration process is not shorter than 15 seconds.

EFFECT: invention enables to obtain granular potassium chloride with improved rheological properties such as static strength and wearing capacity of granules, not contaminated with structure-forming additives.

2 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention can be used in producing halurgic potassium chloride from sylvinite ore using a dissolution-crystallisation method. The method of producing potassium chloride involves structural agglomeration of a mixture of a wet crystallisate and dry hot potassium chloride in a mixer-granulator and then drying the mixture. For structural agglomeration of the mixture, dry hot potassium chloride is fed in amount of 25-100% of the weight of wet crystallisate. The mixture is dried at temperature 105-135C to obtain the end product.

EFFECT: invention reduces caking capacity of potassium chloride, avoids use of structure-forming salts, reduces consumption of reagents used to prevent potassium chloride from caking, and obtain a product which does not contain extraneous impurities.

2 cl, 2 tbl, 2 ex

FIELD: road servicing industry.

SUBSTANCE: the invention is dealt with the road servicing industry, in particular with the methods of extirpation of ice covering on motorways, bridges, flyovers, and also aerodromes. The method of the roadway covering slipperiness prevention provides for application of a roadway ice covering suppressing reactant based on acetate, in the capacity of which use a solution with pH=7-9.5, containing components in the following ratio (in mass %): magnesium acetate 13-17, potassium acetate 8-16, potassium hydrocarbonate 5-8, potassium carbonate 2-6, water-insoluble impurities 0-6, water - the rest. The roadway ice covering suppressing reactant may additionally contain a fired limestone in amount of 3-5 mass % in terms of calcium oxide. The method of production a roadway ice cover suppressing reactant for a roadway covering slipperiness prevention provides for mixing of a component containing a magnesium compound, iced acetic acid and water, in the capacity of the component containing the magnesium compound is used brucite, the stirring is exercised in two stages: first they continuously agitate brucite with water and a part of iced acetic acid in a stoichiometric ratio at the temperature of 50-70°C within 50-80 minutes, then, not terminating mixing at the same temperature in the produced mix with pH=5-6 add the rest of ice acetic acid and then add potash in amount exceeding by 0.1 - 6 % the stoichiometric ratio and continue agitation till production of the roadway ice cover suppressing reactant - a solution with pH = 7-9.5 with the above indicated composition. The used roadway ice cover suppressing reactant has composition mentioned above. The technical result consists in - maintenance of the low temperature at the reactant usage, ensuring the passing ice covered roadways motor vehicles metal corrosion protection and at use as the airfield runways coatings - the corrosion protection of metals used in aircraft designs as well. The roadway coating treated with the reactant has a high coefficient of adhesion, that reduces the accident rate on the roadways.

EFFECT: the invention ensures, that the roadway coating treated with the reactant decreases the accident rate on the roadways.

6 cl, 2 tbl, 4 ex

FIELD: chemical industry.

SUBSTANCE: invention relates to preparations used for prevention and removal of snow-ice formations in roads. An anti-glaze of ice preparation comprises the following components, wt.-%: calcium chloride, 15-50; sodium chloride, 48.5-83.5; potassium ferricyanide, 0.2-0.5, and sodium dihydrogen phosphate, 0.3-1.0. Anti-glaze of ice preparation in granulated form is resistant against caking, inhibits corrosion of metals and reduces inhibitory effect of chloride on plants.

EFFECT: improved and valuable properties of preparation.

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