Method of roadway covering slipperiness prevention, a method of production of a roadway ice cover suppressing reactant for a roadway covering slipperiness prevention and a roadway ice cover suppressing reactant for roadway covering slipperiness prevention

The invention relates to road maintenance production, in particular to methods of combating ice slick on the roads, bridges, roads, and airfields.

Known way to prevent slipperiness of the road surface by applying an icy surface deicing containing molasses, from which removed the sugar, and at least 20% by weight of molasses second component selected from the group of ethylene glycol, diethylene glycol, soluble salt and potassium acetate, chloride or formate, sodium, calcium, magnesium and potassium (see patent US 6416684, publ. 09.07.2002).

The disadvantage of this method is the presence of deicing chloride, adversely affecting both the environment and the road surface, causing their premature destruction, and metal parts of vehicles, contributing to their corrosion.

Closest to the proposed method is a method of preventing slipperiness of the road surface by applying a coating chemicals deicing is a by - product of the production of polytetramethylene based on sodium acetate. This substance can be used both in solid form and in liquid form in solution. The liquid form is 0.2-0.3 l/m²(see EN 2178035 C1 IPC E 01 11/24, publ 10.01.2002).

The known method is also not safe because of the presence in the composition of the reagent of sodium chloride.

A method of obtaining deicing to prevent slipperiness of the road surface, comprising mixing dolomitic limestone with water and then with acetic acid. There is described the resulting de-icing reagent containing calcium acetate, magnesium acetate and potassium acetate (see patent US 4913831).

Closest to the invention is a method for deicing to prevent slipperiness of the road surface, comprising mixing the component containing compound of magnesium, dolomitic lime with glacial acetic acid and water and then introducing the resulting mixture of potassium acetate. The resulting de-icing reagent contains calcium acetate, magnesium acetate and potassium acetate. This reagent is closest to the invention (see patent US 5219483, epubl).

The invention is more environmentally-friendly way to prevent slipperiness of the road surface, ensuring the safety of traffic on the treated road surface, especially in the first period after application of the reagent on the surface, reducing the cost of the resulting reagent due to the use of the natural raw materials, does not require significant costs for its preparation, as well as through the preparation of the reagent in the standard equipment.

The problem is solved in that way prevent slipperiness of the road surface by applying to a deicing on the basis of salts of acetic acid as specified deicing use solution with a pH of 7-9,5, contains components in the following ratio, wt.%:

magnesium acetate 13-17

potassium acetate 8-16

the potassium bicarbonate 5-8

potassium carbonate 2-6

water-insoluble impurities 0-6

water - the rest.

While de-icing reagent may contain calcined limestone in the amount of 3-5 wt.% in terms of calcium oxide. Also the problem is solved in that in the production method of deicing to prevent slipperiness of the road surface, comprising mixing the component containing magnesium compound, glacial acetic acid and water as a component containing a magnesium compound, use brucite, stirring is carried out in two stages: first continuously stirred brucite c water and part of glacial acetic acid in a stoichiometric ratio at a temperature of 50-70°for 50-80 minutes, then stopping stirring at the same temperature in the floor is obtained mixture with a pH of 5-6 add the remainder of glacial acetic acid, and then potash in quantities greater than 0.1-6% from the stoichiometric ratio, and continue to mix until obtaining a deicing solution with a pH of 7-9,5 of the following composition in wt.%:

magnesium acetate 13-17

potassium acetate 8-16

the potassium bicarbonate 5-8

potassium carbonate 2-6

water-insoluble impurities 0-6

water - the rest.

While de-icing reagent may contain calcined limestone in the amount of 3-5 wt.% in terms of calcium oxide.

In addition, the problem is solved in that the de-icing reagent to prevent slipperiness of the road surface, including magnesium acetate and potassium acetate and water, additionally contains potassium bicarbonate and potassium carbonate, and, in addition, it contains water-insoluble impurities in the following ratio of components, wt.%

magnesium acetate 13-17

potassium acetate 8-16

the potassium bicarbonate 5-8

potassium carbonate 2-6

water-insoluble impurities 0-6

water - the rest

if the pH of the reagent 7-9,5.

Thus, de-icing reagent may contain calcined limestone in the amount of 3-5 wt.% in terms of calcium oxide.

The invention is carried out as follows. First prepared de-icing reagent. To prepare to use the following components.

Brucite is a natural mineral containing the rd 96% of magnesium hydroxide, the rest of the mixture.

Acetic acid glacial, satisfying the following requirements on the content of components according to GOST 61-75, in wt.%: acetic acid is at least 99.8, acetic anhydride no more than 0.03, sulfates not more than 0.0001), chlorides not more than 0,0001, heavy metals not more than 0,00003. Potash contains an average of 83.1% of potassium carbonate. Burnt limestone contains 95% of calcium oxide.

Example 1.

Coarsely chopped brucite mixed in the reactor with glacial acetic acid and water in the stoichiometric ratio. Process temperature 60°C. mixing Time of 70 minutes. The resulting reaction mixture has a pH of 5-6. Then the obtained mixture is still added with constant stirring and at the same temperature 60°With acetic acid, after which the mixture is injected potash in an amount greater than the stoichiometric ratio of 3%. Stirring is continued until the receipt of the reagent solution with a pH of 8.3.

Example 2.

The sequence of the method according to example 1, but the temperature of the process 50°C, mixing time of 80 minutes, the amount of potash 0.1% more than the stoichiometric ratio. the pH of the resulting reagent 7,0.

Example 3.

The sequence of the method according to example 1, but the temperature of the process 70°C, mixing time of 50 minutes, the amount of potash 6% more than the stoichiometric ratio. the pH of the resulting reagent 9,5.

Prima is 4.

In obtained in example 2, the reagent was injected burnt limestone in the amount of 4% in terms of calcium oxide.

The deicing composition obtained according to the above mentioned examples are shown in table 1. The test results are shown in table 2. This reagent is used to prevent slipperiness of the road surface. On roads with ice formation using known mechanical means applied de-icing reagent in the amount of 40 ml/m². Anti-icing properties of the reagent are given in table 2.

As can be seen from the above data, the described method of preventing slipperiness of the road surface, which used de-icing reagent, obtained by the described method provides a low temperature use reagent prevents corrosion of the metal of the vehicle, and when used on airfield pavements and metals used in aircraft construction. The road surface treated with the reagent has a high coefficient of friction, which reduces the accident rate on the roads. Also the described method and used reagent do not harm the environment as acetates initiate the microbial activity of the soil complex, and magnesium and calcium (when Ni is sustained fashion its introduction), being a biology friendly elements, increase the productivity of green plants and lawn grasses. Furthermore, the method of obtaining deicing economical, since it does not require expensive equipment for its implementation, in particular does not require grinding of brucite to small fractions.

1. The way to prevent slipperiness of the road surface by applying to a deicing on the basis of salts of acetic acid, characterized in that, as specified deicing use solution with a pH of 7-9,5, contains components in the following ratio, wt.%:

Magnesium acetate 13-17

Potassium acetate 8-16

The potassium bicarbonate 5-8

Potassium carbonate 2-6

The water-insoluble impurities 0-6

Water the Rest

2. The method according to claim 1, characterized in that the de-icing reagent further comprises calcined limestone in the amount of 3-5 wt.% in terms of calcium oxide.

3. The method of obtaining deicing to prevent slipperiness of the road surface, comprising mixing the component containing magnesium compound, glacial acetic acid and water, characterized in that as component containing a magnesium compound, use brucite, stirring is carried out in two stages: first, continuously move the're asked brucite c water and part of glacial acetic acid in a stoichiometric ratio at a temperature of 50-70° C for 50-80 minutes, then stopping stirring at the same temperature as the mixture with a pH of 5-6 add the remainder of glacial acetic acid, and then potash in quantities greater than 0.1-6% from the stoichiometric ratio, and continue to mix until obtaining a deicing solution with a pH of 7-9,5 of the following composition, wt.%:

Magnesium acetate 13-17

Potassium acetate 8-16

The potassium bicarbonate 5-8

Potassium carbonate 2-6

The water-insoluble impurities 0-6

Water the Rest

4. The method according to claim 3, characterized in that the de-icing reagent further comprises calcined limestone in the amount of 3-5 wt.% in terms of calcium oxide.

5. De-icing reagent to prevent slipperiness of the road surface, including magnesium acetate, potassium acetate and water, characterized in that it additionally contains potassium bicarbonate and potassium carbonate, and, in addition, it contains the water-insoluble impurities in the following ratio, wt.%:

Magnesium acetate 13-17

Potassium acetate 8-16

The potassium bicarbonate 5-8

Potassium carbonate 2-6

The water-insoluble impurities 0-6

Water the Rest

if the pH of the reagent 7-9,5.

6. De-icing reagent according to claim 5, characterized in that it further content is tons of calcined limestone in the amount of 3-5 wt.% in terms of calcium oxide.