A method of obtaining a de-icing reagent
(57) Abstract:The invention can be used to prevent and remove ice formations on airfield pavements and removal of snow and ice cover in winter road maintenance. A method of obtaining a de-icing reagent is a combination of inorganic salts with complexing agents, highlighting the complex salt, addition of an inhibitor and a surfactant, followed by granulation of the obtained product, and as inorganic salts dolomite use as complexing agents - glycol, and the first dolomite treated with dilute hydrochloric or acetic acid formed is evaporated salt until the solution temperature of 140-150oC, add glycol, the mixture is stirred, the received complex salt type corrosion inhibitors - ethoxylated monoalkylphenols based trimers of propylene as a surfactant and the resulting substance granularit. When this process is carried out at a molar ratio of dolomite-acid-glycol-water/1-4-1-8 respectively to obtain the de-icing reagent of the following composition, wt.h.: complex salt (salt, water, glycol) - 100 mA is H2OS4H10ABOUT3in the case of hydrochloric acid or Sa(C2H3ABOUT2)2Mg(C2H3ABOUT2)22H2OS4H10ABOUT3in the case of acetic acid. The technical result - the simplification of the process of obtaining a de-icing reagent, reducing its cost, elimination of fire hazard properties at elevated temperatures and in the presence of organic matter (spills of fuel, lubricants, and so on). The invention relates to the field of production of de-icing agents used to prevent and remove ice formations on airfield pavements and roads in urban and non-urban routes.For airfields and roads the most energy-intensive, time-consuming and costly process is the removal of ice formations and increase the frictional properties of coatings.Currently, chemical and mechanical methods of icing are more productive compared with thermal method using heat engines.It is known the use of chlorides of alkali and alkaline earth metals with corrosion inhibitor to remove snow and ice cover in winter content is Onna activity due to the introduction of anti-corrosion additives.A well-known drug for the removal of ice, containing 5-15 wt.% urea, 1-5 wt. % monohydroxy aliphatic alcohol and 60-70 wt.% polyglycol (application of UK 2027046, C 09 K 3/18, 1980), which contributes to the rapid melting of ice.A method of obtaining anti-icing material is carried out by mixing mineral fillers with chlorides of alkali and alkaline earth metals by heating and subsequent introduction of molten sulfur (USSR author's certificate 1719420, C 09 K 3/18, 1992).Known anti-icing drugs are ineffective when used for cleaning airfield pavements, the sudden change of the temperature range, cause corrosion of metals airfield machinery and equipment.The closest in technical essence and the achieved effect is a method for de-icing reagent for airfield pavements carried out by the combination of inorganic salts with complexing agents, highlighting the complex salt, addition of an inhibitor and a surfactant, followed by granulating the obtained reagent (Patent RU 2123022 C1, 09 K 3/18, running from 10.12.1998).As the inorganic salts used the s on oxides, hydroxides or metal salts (see Chemical encyclopedic dictionary. M: Soviet encyclopedia, 1983, S. 381), and as complexing agents use - urea (carbamide).As surface-active substances used nonionic surfactants of the type based on the products of the interaction of ethylene oxide or propylene with APS.Known this drug is effective when a sudden change in temperature (up to minus 20oC) reduces the time of preparation of the aerodrome.However, the method involves the use of expensive inputs such as urea, requires additional safety measures as in the manufacture of the reagent, and during its storage and use, due to the presence in the structure of nitrates and urea and low thermal stability (decomposes at 150oWith, and in the presence of organic matter at temperatures above 150-160oWith decomposes with explosion, like all nitrates).The technical objective of the claimed invention is the simplification of the process of obtaining a de-icing reagent, reducing its cost, elimination of fire hazard properties at elevated temperatures and in the presence is in the process for de-icing reagent, implemented by the combination of inorganic salts with complexing agents, highlighting the complex salt, addition of an inhibitor and a surfactant, followed by granulation of the obtained product, as inorganic salts dolomite use as complexing agents - glycols (diethylene glycol, ethylene glycol, propylene glycol or mixtures thereof), and at first dolomite treated with dilute hydrochloric or acetic acid formed is evaporated salt until the solution temperature of 140-150oC, add glycol, the mixture is stirred, then add corrosion inhibitors and surfactants derived substance granularit. When this process is carried out at a molar ratio:
a) in the case of hydrochloric acid/dolomite-acid-glycol-water/1-4-1-8 respectively;
b) in the case of acetic acid/dolomite-acid-glycol-water/1-4-1-8 respectively;
to obtain the de-icing reagent of the following composition, wt.h.: complex salt (salt, water, glycol) - 100 wt.h.; inhibitor (mixture of salts, sodium nitrate, borax, captax, sodium benzoate) - 3 wt.h.;
Surfactant is ethoxylated monoalkylphenols - 1 wt.h.The received complex salt has the formula
l2BR>Sa(C2H3O2)2Mg(C2H3O2)2H2OS4H10ABOUT3in the case of dolomite, acetic acid and diethylene glycol;
CaCl2MgCl22H2OC2H6O2in the case of dolomite, hydrochloric acid and ethylene glycol;
CaCl2MgCl22H2OC3H8O2in the case of dolomite, hydrochloric acid and propylene glycol.Examples of specific performance:
Example 1. In capacity under the thrust placed 400 ml of 37% hydrochloric acid, add water to 1 l, and then the portions enter 184 g of dolomite under stirring. Upon completion of the reaction, introducing a slight excess of dolomite and allow the precipitate to settle. The clarified brine is poured into another container and filtered. The resulting filtrate is evaporated on a gas burner until the temperature of the brine 140-150oC. To the obtained solution under stirring impose 114 g of diethylene glycol, containing 8 g of inhibitors (a mixture of salts, sodium nitrate, borax, captax, sodium benzoate). Then add 2 g of the surfactant. The resulting reagent in the form of a melt is cooled and crushed to granules. (In industrial production suggest to granulation by known technologies for producing granulated UD% solution of the obtained reagent -28oC. freezing point known reagent (complex nitrates of CA and Mg with urea) of the same concentration -26oC.Example 2. In a similar way we obtain and reagent based on acetic acid. The melting point of the obtained product 40-50oC. the freezing point of a 30% solution -26oC.Example 3. In capacity under the thrust placed 400 ml of 37% hydrochloric acid, add water to 1 l, and then the portions enter 184 g of dolomite under stirring. Upon completion of the reaction, introducing a slight excess of dolomite and allow the precipitate to settle. The clarified brine is poured into another container and filtered. The resulting filtrate is evaporated on a gas burner until the temperature of the brine 140-150oC. To the obtained solution under stirring impose 62 g of ethylene glycol, containing 8 g of inhibitors (a mixture of salts, sodium nitrate, borax, captax, sodium benzoate). Then add surfactant 2, Receive a reagent having a freezing temperature of -44oC.Example 4. In a similar way we obtain and reagent-based propylene glycol. The freezing point of the resulting product -42oC.Thus, get the reagents low cost, does not contain sochetautsa. It should be noted and single-stage process of technological process of obtaining de-icing reagent according to the current pattern of production of calcium chloride. A method of obtaining a de-icing reagent comprising a mixture of inorganic salts with complexing agents, the addition of surfactant is polyoxyethylene monoalkylphenols based trimers of propylene with subsequent granulation of the obtained reagent, characterized in that the inorganic salts used dolomite, as complexing agents - glycol, and the first dolomite treated with hydrochloric or acetic acid, the formed salt concentrate to a temperature of brine 140-150oC, add glycol, the mixture is stirred, the received complex salt type corrosion inhibitor, surfactant and granularit reagent, the process is carried out at a molar ratio of dolomite/acid/glycol/water - 1-4-1-8 to obtain a de-icing reagent of the following composition, wt. including :
Complex salt - 100
Corrosion inhibitor - 3
SAS - 1
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