The deicing composition of an aqueous solution for surface treatment of roads
(57) Abstract:Use: for surface treatment of roads from winter slipperiness (snow forward, ice). The composition contains, wt%: calcium chloride 20-30, urea 2-5, corrosion inhibitor (polyaniline or polyvinilpirolidone chlorides or a mixture thereof) 0,02-0,04, water - the rest. The technical result is a good melting properties at low temperature crystallization (up to minus 50°C), reduce corrosion, the composition is not adversely merge on the environment. table 1. The invention relates to the production of anti-icing composition of an aqueous solution for surface treatment of roads from winter slipperiness (snow forward, ice, ice slick on the roads and streets in cities and towns.A method of obtaining anti-icer - anti-icing composition used for the elimination of snow and ice formations.with. USSR N 272462, 1970). The composition contains calcium chloride or its mixture with sodium chloride, in which for the purpose of preventing corrosion of metals injected sodium nitrite calcium in the amount of 2-40%.The composition obtained as a crystalline salt of a complex technology: evaporated until a certain concentration is atratum. In addition, the use of such composition on the roads has a negative impact on the plants growing along the roads.The closest analogue of the present invention is a de-icing agent (U.S. patent N 4094805, 1978) containing calcium chloride and/or sodium chloride, and/or urea and 0.01-100% polymer of ethylene oxide (policed). This reagent is proposed for use before you freeze water on concrete and asphalt roads to prevent their destruction. The disadvantage of this reagent are not sufficiently low freezing temperature (not lower than -23oC).The present invention is to obtain affordable cheap stock with good melting properties at low temperature crystallization, the composition having a low degree of corrosion, do not have a negative impact on the environment, the composition of which may be used after freezing the water on the roads.The task is solved in that the deicing composition of an aqueous solution for surface treatment of roads includes calcium chloride, urea, and further comprises a corrosion inhibitor for metal surfaces from a number of Quaternary non ratio of components wt. %:
Calcium chloride - 20-30
Urea - 2-5
Corrosion inhibitor - 0,02-0,04
Water - the Rest
The choice of the optimal concentration of the parameters of the deicing composition shown in the table.The choice of the concentration of calcium chloride (20-30%) is associated with temperature conditions during processing: less than 20% does not allow processing at temperatures below -15oC, and more than 30% is meaningless, because this temperature can be achieved within the concentration of calcium chloride 20-30%.The table shows that the addition of corrosion inhibitor reduces the freezing point of the solution (cf. N 1 and 2), reduces the corrosion of metals (cf. N 4 and N 5-7).The choice of the limit values of concentration of corrosion inhibitor (0,02-0,04%) related to the efficiency of its impact on metal: concentration of 0.01 is still insufficient, and the use of concentration more than 0.04 loses all meaning, because the corrosion rate varies slightly (N 5-7).Assessment fetotoksicheskoe action on plants was conducted on the germination of seeds at the initial stage of their development that made it possible to assess the degree of influence on the development of seeds within a reasonable range of influence of urea.Pokeman (cfand (cf, %) to control. Control seeds were parsevals distilled water and was duplicated in two replications (cfthe control sample was 86.42 mm). We selected a limit on the concentration of urea 2-5% (N 9-11).The product is a 20-30% aqueous solution of calcium chloride with 2-5% urea and 0.02-0.04% of polyaniline and polyvinilpirolidone chloride or mixtures thereof.The tests have shown that this product meets the requirements for de-icing solutions for surface treatment of roads. The deicing composition of an aqueous solution for surface treatment of roads, including calcium chloride and urea, characterized in that it further contains a corrosion inhibitor for metal surfaces from a number of Quaternary ammonium compounds, such as polyaniline or polyvinilpirolidone chloride or mixtures thereof, in the following ratio, wt.%:
Calcium chloride - 20 - 30
Urea - 2 - 5
Corrosion inhibitor - 0,02 - 0,04
Water - The Rest
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.
FIELD: special reagents.
SUBSTANCE: invention relates to substances for applying on surface to prevent or diminish adhering ice, mist or water on it, for prevention of icing, in particular, to anti-glaze of ice reagents. The composite comprises the following components, wt.-%: calcium chloride, 25-32; urea, 2-7; sodium nitrite, 0.03-1.0, and water, the balance. Invention provides preparing the composite harmless for environment that doesn't show harmful effect on environment, doesn't corrode road coatings, and inhibits corrosion of metals. Agent shows economy and high effectiveness.
EFFECT: improved and valuable properties of reagent.
2 cl, 1 tbl
FIELD: road-transport industry.
SUBSTANCE: method includes applying substance on asphalt-concrete mixture. As substance silicon-organic modifier is used, loss of which at 1 m2 of area of pre-placed on road asphalt-concrete mixture at temperature 80-100°C is no less than 0,3-0,5 kg. After applying modifier, asphalt-concrete mixture is rolled.
EFFECT: higher efficiency, no corrosive effect on metals, effective at temperature above -20°C.
2 cl, 3 tbl, 3 ex, 1 dwg
FIELD: domestic chemistry.
SUBSTANCE: invention relates to agents using against misting and icing windshields in transports, sight glasses in agent of individual protection and can be used in living conditions for prevention showcase glasses icing. The composition comprises the following components, wt.-%: polyoxyethylene glycol ester of synthetic primary higher alcohols of (C12-C14)-fraction as a surface-active substance, 6-25; urea or thiourea, or mixture of urea and thiourea, 1-20; glycerol, 5-25; ethylene glycol, 5-41; dye, 0.0005-0.02, and a solvent, the balance. Propyl alcohol as propanol-1 or propanol-2 can be used as a solvent. The composition elicits an anti-misting and anti-icing properties, provides two-sided protection of sight glasses of transport agents and agents of individual protection in cooling the protecting glass surface up to -40°C, elicits the prolonged protective effect, it doesn't solidify at the environment temperature below -40°C and doesn't require the special technical devices for its applying.
EFFECT: valuable properties of composition.
3 cl, 1 tbl, 10 ex
FIELD: Composition of an anti-icing water solution for roads surface treatment.
SUBSTANCE: the invention is pertaining to production of composition of an anti-icing water solution for roads surface treatment against a winter slipperiness (snow rolling-ups, a glaze ice, black ice) n the roads and streets in cities and settlements. The composition contains, in mass %: 20-27 calcium chloride, 5-30 ethyl alcohol, 0.3-5 corrosion inhibitors (borax or sodium nitrite or their mixture), the rest - water. The technical result is - an increase of effectiveness of the composition application, an increase of friction coefficient due to a decrease of the ice density, a raise of the composition ice melting capacity.
EFFECT: the invention ensures an increase of effectiveness of the composition application, an increased friction coefficient and a decreased ice density, a raise of the composition ice melting capacity.
1 cl, 1 ex, 2 tbl
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
FIELD: preventive means against freezing and sticking of loose materials to walls of mining and transport equipment; prevention of dusting on interim roads, open-cut mining; protection of rolling stock against freezing and blowing-off of loose materials, coal and peat for example.
SUBSTANCE: preventive means is made in form of mixture of solvent and thickening additive of oil nature. Used as solvent are distillation residues of coke and by-product process and/or by-products of production of butadiene, isoprene, isobutylene, ethylene both independently and in mixture with distillation residues of production process of polymers, pyrolysis residues, benzene, styrene and distillation residues of production of butanol, isobutanol, 2-ethyl hexanol acid and 2-ethyl hexanol. Solvent may additionally contain gas oils of thermal and catalytic cracking and gas oils of coking process. Used as thickening additives are mineral and synthetic oils of all kinds, mixture of used oils, oil sludge, oil residues and oil fuel. Components of thickening additive and solvent are used at any combination. Novelty of invention is use of wastes of various processes of oil and petroleum chemistry products.
EFFECT: extended field of application; cut costs; enhanced ecological safety.
5 cl, 1 dwg, 2 tbl, 17 ex
FIELD: suppression or reduction of icing on surfaces by means of antiicing compounds.
SUBSTANCE: proposed anti-icing compounds contain succinic acid and/or succinic anhydride and neutralizing base, sodium hydroxide, potassium hydroxide or ammonium hydroxide in particular. When mixed with water anti-icing compounds form succinates in the course of reaction which causes fast liberation of heat sufficient for melting ice on surface. According to other versions, anti-icing compounds contain glycol which inhibits repeated icing on cleaned surface. Specification gives description of sets of compounds for melting snow and ice.
EFFECT: enhanced efficiency of melting snow and ice on aircraft and territories of their operation.
29 cl, 11 dwg, 7 tbl, 2 ex
FIELD: motor-car industry; other industries; methods of production of the anti-icing reactant.
SUBSTANCE: the invention is pertaining to the method of production of the anti-icing reactants for maintenance of roads in winter. The method of production of the anti-icing reactant based on sodium chloride and calcium chloride provides for mixing of the sodium chloride with calcium chloride and their heating and drying. Sodium chloride crystals are coated with the atomized solution of calcium chloride and dried in the "boiling bed" kiln with production of the double-layer granules, the outer layer of which is composed out of calcium chloride. Sodium chloride crystals are coated with calcium chloride in two phases. The forming small particles of calcium chloride are fed into the cyclone, whence the cyclone dust of the calcium chloride is fed into the mixer for intermixing with the wet crystals of sodium chloride. The produced anti-acing reactant has the improved physicochemical thermodynamic properties.
EFFECT: the invention ensures, that the produced anti-acing reactant has the improved physicochemical thermodynamic properties.
3 cl, 1 ex, 2 tbl