Means for removing ice on the basis of acetate and/or formate and method of melting snow and ice on road surfaces with this tool
(57) Abstract:The described means for removing ice consists mainly of (a) 87 - 99,45 wt. % of alkali metal acetate or formate of an alkali metal, or mixtures thereof, b) 0.5 to 10 wt.% silicate of an alkali metal and (C) 0.05 to 3 wt.% phosphate of an alkali metal. It can be used in solid form (powder, granular or similar) or in the form of an aqueous solution. Describes how to melt ice and snow on road surfaces with an effective amount of the proposed tools in solid form or in aqueous solution. The technical result - the provision of short time thawing and corrosion protection, in particular in relation to magnesium. 2 S. and 2 C.p. f-crystals, 1 table. The invention relates to a tool for removing ice on the basis of the acetates of alkali metals, alkali metal formate or a mixture of both of them for the road surface. The invention also relates to a method of melting snow and ice on road surfaces when using this tool.Snow and/or ice on roads, cycle tracks, footpaths, bridges, playgrounds, airports, etc., (hereinafter called the road surface) is largely wliaa such surfaces should be applied to the means for melting or thawing snow and ice.Requirements that must be performed by a means for removing ice, very versatile. The materials from which are constructed the surface in question, for example concrete, must not be damaged or even destroyed due to the impact of the means for removing ice. It is essential, then, that there must be no impact on the metals causing corrosion. Because the tool can get into the waste water, a further requirement is the biological destruction. It is important, then, to the thawing was achieved very quickly. From an economic point of view it is necessary, finally, to require only a small amount to remove ice and that it was inexpensive.In the prior art described as a means for removing ice numerous salts of alkaline and alkaline-earth metals of inorganic and organic acids, for example, sodium chloride, potassium chloride, sodium formate, calcium formate, sodium acetate, magnesium acetate, sodium lactate, etc. These tools to remove ice, in particular a formate and acetate, just perform many of the above requirements, leaving much to be desired in respect to corrosion. They act primarily on legiate for vehicles as, for example, cars, motorcycles, airplanes, etc.Already attempted to solve the problems mentioned above by using inhibitors. For example, in European patent EP-A 0375214 described liquid for removal of ice, which consists mainly of 45-60 wt.% acetate of an alkali metal and/or alkali metal formate, 0.1 to 0.4 wt.% phosphate of an alkali metal, 0.2 to 0.6. % nitrate of an alkali metal and water in the form of residual amounts to 100 wt.%, the weight percentages are given relative to the weight of the means for removing ice. Inhibitory effect of phosphate of an alkali metal and nitrate of an alkali metal leaves is, however, still much to be desired, especially in relation to magnesium; the disadvantage is the content of nitrite.In the Federal Republic of Germany patent DE-A 4034217 describe liquid or solid tool for removing ice based on water-soluble formic acid salts of alkali metals and/or acetic acid salts of alkali metals and inhibiting system against corrosion consists of water-soluble polycarboxylic acids and water-soluble silicates, ammonium or alkali metal and/or ammonium carbonates and/or alkali metals. It does not contain chloride and nitrite tool for removing ice there should outerelo, as, for example, iron, copper, aluminum or zinc. Anti-corrosive action is based on a combination of water-soluble polycarboxylic acids, such as succinic acid, citric acid or tartaric acid, and water-soluble silicate and/or carbonate. In the case of light metals, it also leaves much to be desired.There are also U.S. patent US F 4803007, describe where the means for removing ice on the basis of sodium chloride, as a corrosion inhibitor, a mixture of salts of divalent metal and an alkali metal polyphosphate. As divalent metals, among others, referred to as calcium, magnesium and barium, and the counterion - borates, metasilicate and sulfates. This combination of inhibitors counteracted primarily corrosion of metals based on iron, to a lesser extent, however, the corrosion of light metals, such as magnesium.It was found that a mixture of phosphates of alkali metals and alkali metal silicates is a particularly effective inhibitor of the corrosion of light metals for tools to remove ice on the basis of formic acid and/or acetic acid salts of alkali metals.The tool according to the invention consists of the foundations of the and,
b) 0.5 to 10 wt.%, preferably 2-7 wt.% silicate of alkaline metal and
C) 0.05 to 3 wt.%, preferably, 0.1 to 1 wt.% phosphate of an alkali metal.Component a) is preferably a formate of an alkali metal. Of water-soluble alkali metal formate, and acetates of alkali metals preferred formate and acetates of sodium and potassium. Component (a) is, thus, preferably formate, sodium and/or potassium formate.Component b) is a water-soluble alkali metal silicate, with an alkaline metal is again the sodium or potassium. The relevant authorities are orthosilicate (mono-, di-, tri - and tetraoninae), disilicate to tetrasilicate and/or water-soluble metasilicate, which is preferable.Component C) is a water-soluble phosphoric acid salt of an alkali metal. It can be one-, two - or rejonowy phosphate of an alkali metal, and alkaline metal is preferably sodium or potassium.Obtaining means for removing ice according to the invention is carried out by mixing the liquid and solid components. Means for removing ice Mora. Number three, or, if appropriate, further suitable components in aqueous media to remove ice (total concentration) can be changed within wide limits. It depends primarily on the solubility of the components in the water (you should have mostly clear solution). When using concentrated solution requires fewer to thaw the ice and/or snow than the less concentrated solution. The preferred concentration is in accordance with that from 15 to 70 wt.%, preferably 25-60 wt. % relative to the weight of the solution. The pH of the water means for removing ice is in the range 7-10. As mentioned, the pH after mixing of the components is not always corresponds to the specified values, it set at the desired value with the help of additives, preferably alkali metal hydroxide, such as sodium hydroxide or potassium.The method according to the invention for melting snow and ice on the road surface differs in that an effective amount of the described means for removing ice (in solid or liquid form) applied to be processed from the road surface, i.e., such amount, the atmospheric temperature and available quantities of ice and/or snow and is in General 10-100 g / m2the surface is covered with ice and/or snow. The coating liquids for the removal of ice can be realized, for example, using a conventional spraying vehicles.The tool according to the invention has several advantages. For example, it performs the mentioned first and requirements along with a reduced time of thawing has also, in an unexpected way, high any abscopal properties against corrosion of metals, in particular magnesium. This is obviously the result of a combination of these phosphates and silicates respectively in a certain amount and the fact that this system inhibitors are highly effective in the case of acetates of alkali metals and/or alkali metal formate. Means for removing ice according to the invention does not contain chlorides, nitrides and also particularly suitable for surfaces airfield fields, such as, for example, the starting track and track landing, Parking areas, bus routes, etc., It is used preferably in solid form (powder, granules, grains, etc).The invention is illustrated further by the examples according to the invention and the examples for comparison.shall I compare made by mixing the components. The percentages of the number of separate components represent weight percent.Example 1
97.8% of sodium formate
to 2.0% of sodium silicate
92,0% potassium formate
7,0% sodium metasilicate
90.0% of sodium formate
8.0% metasilicate potassium
96.5% of sodium formate
0.5% sodium metasilicate
3,0% trisodium phosphate
87,0% of sodium formiate
10,0% sodium metasilicate
3,0% acidic discalificata
The example for comparison 1
97.8% of sodium formate
2,0% metasilicate calcium
The example for comparison 2
99.0% sodium formate
0.5% sodium metasilicate
0.5% of citric acid
The example for comparison 3
97.8% of sodium chloride
2,0% metasilicate calcium
Means for removing ice according to examples 1-5 and examples 1-3 were tested against corrosion of magnesium. The tests were carried out in accordance with ASTM F483 (ASTM - American Society for Testing and Materials). While suspended, the samples were dipped for 24 cmolina pressure, then again determine its weight. The result of the corrosion test is given as the difference between the weights of both definitions of weight in milligrams per cm2the sample for 24 hours. The test was performed with magnesium AMS 4375 (chromated) and 15 wt.%-tion aqueous solutions of these tools to remove ice. The results are summarized in the table below and show that the means for removing ice according to the invention have high any abscopal properties against corrosion of magnesium. As for time defrost tool for removing ice according to the invention, it meets the requirements of the rapid thawing of ice and snow. Means for removing ice according to the invention have thus unexpectedly high any abscopal properties against corrosion of magnesium and required short defrost time. 1. Means for removing ice consisting of alkali metal acetate or formate of an alkali metal or mixture of alkali metal silicate and phosphate of an alkali metal, characterized in that it is a composition with the following weight ratios: (a) 87 - 99,45 wt.% the alkali metal acetate or formate of an alkali metal or mixtures thereof; b) 0.5 to 10 masisa fact, it consists mainly of (a) 92 - 97,9 wt. % of alkali metal acetate or formate of an alkali metal or mixtures thereof; b) from 2 to 7 wt.% silicate of an alkali metal and b) 0.1 to 1 wt.% phosphate of an alkali metal.3. Means under item 1 or 2, characterized in that component a) is an alkali metal formate, component b) is metasilicate and component C) is a one-, two - or rejonowy phosphate of an alkali metal.4. The way to melt ice and snow on the road surface by the means for removing ice consisting of alkali metal acetate or formate of an alkali metal or mixture of alkali metal silicate and phosphate of an alkali metal, characterized in that an effective amount to remove ice under item 1 in solid form or in aqueous solution applied to the surface of roads.
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