CA2099483A1 - Process for melting snow and/or ice using an alkali metal carboxylate - Google Patents
Process for melting snow and/or ice using an alkali metal carboxylateInfo
- Publication number
- CA2099483A1 CA2099483A1 CA002099483A CA2099483A CA2099483A1 CA 2099483 A1 CA2099483 A1 CA 2099483A1 CA 002099483 A CA002099483 A CA 002099483A CA 2099483 A CA2099483 A CA 2099483A CA 2099483 A1 CA2099483 A1 CA 2099483A1
- Authority
- CA
- Canada
- Prior art keywords
- sodium acetate
- ice
- weight
- snow
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/18—Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
- C09K3/185—Thawing materials
Abstract
Abstract of the disclosure:
Process for melting snow and/or ice using an alkali metal carboxylate A sodium acetate which is essentially anhydrous and has the form of particles having a smooth surface and a diameter of 0.3 to 10 mm is employed as de-icing agent in the process described. The sodium acetate described also meets above all the requirements for a rapid thawing action and for only slight, if any, cooling of the environment, whereby melting of ice and snow is accele-rated further.
Process for melting snow and/or ice using an alkali metal carboxylate A sodium acetate which is essentially anhydrous and has the form of particles having a smooth surface and a diameter of 0.3 to 10 mm is employed as de-icing agent in the process described. The sodium acetate described also meets above all the requirements for a rapid thawing action and for only slight, if any, cooling of the environment, whereby melting of ice and snow is accele-rated further.
Description
~09948~
HOECHST AKTIENGESELLSCHAFT HOE 92/F 913 Dr.GL-nu Werk Gendorf Process for melting snow and/or ice using an alkali metal carboxylate Description The invention relates to a process for melting snow and/or ice on traffic surfaces by application of a specific alkali metal carboxylate.
Snow and/or ice on roads, cycle paths, footpaths, bridges, sportsgrounds, airports and the like (called traffic surfaces below) lead to a considerable impairment in traffic flow and traffic safety. It has therefore already been known for a long time to apply water-soluble salts to such surfaces, ice and ænow melting (thawing) and an aqueous solution of the salt of correspondingly reduced freezing point being formed.
If salts are employed as de-icing agents, the following requirements above all should be met: the salt should not damage or even decompose the material from which the surfaces mentioned are constructed, for example concrete.
It is furthermore essential that a corrosive action on metals also is excluded. ~he salt should be acceptable to humans and animals and have a good biodegradability. ~he salt employed should cause rapid thawing as substantially as possible. Finally, from the economic point of view, it is necessary that only a small amount of de-icing agent is required, that it costs little and that it is easy to store and easy to handle.
In view of the requirements mentioned, alkali metal and alkaline earth metal salts of organic acids are mentioned above all as advantageous de-icing agents in the prior art. U.S. Patent 4,855,071 thus describes alkali metal and/or alkaline earth metal carboxylates having l to 4 .
.
2099~83 carbon atoms, prepared by a particular process, as de-icing agents, an essentially anhydrous calcium/magnesium acetate being recommended in particular. European Patent Application 0 483 721 Al describes a liquid de-icing S agent which essentially comprises water, an alkali metal acetate and/or alkaline earth metal acetate and specific corrosion inhibitors.
Although the known de-icing agents based on alkali metal carboxylates and/or alkaline earth metal carboxylates meet most of the abovementioned requirements, they leave something to be desired in particular in the following respect: the action of a salt as a de-icing agent is based, as already mentioned above, on the reduction in the freezing point of water by the salt. Another process which occurs here is thawing (melting) of the ice and/or snow, which requires energy and leads to severe, although short-term, cooling (cold shock) of the immediate environment, since the ener~y required (heat of fusion) is withdrawn therefrom. This results not only in a delay in the thawing process, but also in more or less severe damage to the traffic surface covering. The water in the top layer, of for example a concrete covering, in fact undergoes sudden formation of ice and therefore an increase in volume because of the cold shock mentioned, and this can lead to the particular top layer of the concrete cracking open. The action of the alkali metal and alkaline earth metal carboxylates hitherto described as de-icing agents is thus based only on the action of these salts in reducing the freezing point when dissolved in water.
The object of the invention accordingly is to propose, from the large number of de-icing agents in the form of alkali metal and~or alkaline earth metal carboxylates, which are advantageous per se, one w~ich has a high action in respect of reduction in the freezing point and releases heat in an exothermic reaction during the process of thawing (melting) of ice and snow, whereby the 2099~3 heat of fusion of ice and snow will be more or less compensated and the cold shock mentioned will therefore be reduced or even eliminated completely. This salt furthermore should be particularly ecologically and physiologically acceptable, have no corrosive action on metals and the covering of the traffic surfaces, be readily biodegradable and be easy to handle and store.
Such a salt would be desirable, above all, in all cases where rapid thawing of ice and/or snow and at the same time only slight, if any, cooling (low cold shock) of the environment are important.
It has been found, surprisingly, that a certain alkali metal carboxylate, and in particular a specific sodium salt of acetic acid, has all the required properties when used as a de-icing agent.
The process according to the invention for melting snow and/or ice on traffic surfaces comprises applying to the traffic surfaces covered with snow and/or ice an effective amount of a sodium acetate which is essentially anhydrous and is in the form of particles having a smooth surface and a diameter of 0.3 to 10 mm.
A sodium acetate which has a combination of quite parti-cular features is thus employed in the process according to the invention. It is a sodium acetate which has been dried to a very low water content. It should contain less - than 10% by weight, preferably less than 5% by weight, and in particular less than 0.5% by weight of water (the percentages by weight relate to the weight of the sodium acetate to be employed). Taking into account the economics of preparation and storage of dry (anhydrous) sodium acetate, a sodium acetate which contains only about 0.05 to 10% by weight of water, preferably 0.05 to 5% by weight and in particular about 0.05 to 0.5% by weight of water will be employed (the percentages by weight relate to the sodium acetate to be employed). The sodium acetate proposed according to the invention 2099~83 furthermore should have a selected morphology. It should be in the form of particles (granules), preferably in the form of grains, beads or prills, in particular in the form of beads or prills, the particles having a diameter of about 0.3 to 10 mm, preferably 0.5 to 5 mm and in particular about 1 to 3 mm. The surface of the particles should be essentially smooth, that is to say not rough or porous or the like.
The sodium acetate to be employed according to the invention is prepared by mixing acetic acid and aqueous, sodium hydroxide solution essentially stoichiometrically and drying the aqueous sodium acetate solution in a spray granulator to give the particles to be employed according to the invention. The acetic acid is preferably employed in the form of a 90 to 99.9% strength by weight aqueous solution and the sodium hydroxide is employed in the form of a 30 to 50~ strength by weight aqueous solution (aqueous sodium hydroxide solution). Acetic acid and the sodium hydroxide are preferably employed in an amount such that the resulting sodium acetate solution has a pH
of 7 to 11. Mixing of the aqueous acetic acid and aqueous sodium hydroxide solution and, if appropriate, additional water is preferably carried out at a temperature of 40 to 90C, the heat of neutralization being removed by cool-ing. The resulting aqueous sodium acetate solution as arule comprises 30 to 65% by weight of sodium acetate, preferably 40 to 60% by weight, the percentages by weight being based on the weight of the aqueous solution. A true (unsaturated, lew-viscosity, clear) solution of sodium acetate in water is thus present (based on the stated temperature of 40 to 90C). The particles to be employed according to the invention are obtained from this specific sodium acetate solution in a customary spray granulator (spray dryer). For this, the aqueous sodium acetate solution is sprayed in a granulator with one or more jets and is dried with the aid of air or nitrogen at a temperature of preferably 100 to 130C. It has proved advantageous if sodium acetate particles are already _ 5 _ 2~99 4 8 3 present in the fluidized state in the spray-dryer at the start of spraying of the sodium acetate solution described, the sodium acetate solution then being sprayed onto these particles. The particle material (granules) falling down in and discharged from the granulator in the form of, preferably, beads or prills has the smooth surface required according to the invention and the degree of dryness required according to the invention.
The particle size required according to the invention is also obtained by separating off (sieving) the small and large particles in the particle material.
The sodium acetate of low surface area proposed according to the invention is a particularly advantageous de-icing agent because of its low water content and its specific morphology. It meets all the abovementioned requirements, such as ecological and physiological acceptability, no corrosive action on metals and traffic surface coverings, good biodegradability and easy handling and storage (the sticking together feared as a result of hygroscopy does not occur). The sodium acetate proposed according to the invention above all also meets the requirements of a rapid thawing action and only slight, if any, cooling of the environment. In particular, it effects not only a large reduction in the freezing point, but also liberates heat of solution, which means that the melting of ice and snow is accelerated and proceeds without the cold shock mentioned occurring. Furthermore, because of these special properties, a high preventive effect is also achieved. A particularly advantageous de-icing agent is thus available with the sodium acetate proposed according to the invention.
In the process according to the invention for melting snow and/or ice on traffic surfaces, an active amount of the solid de-icing agent described is applied to the traffic surface to be treated, that is to say an amount such that the required melting or thawing of ice and/or snow is achieved. This amount depends above all on the - 6 _ 2099483 external temperature and the amount of ice and/or snow present, and is in general 10 to 400 g per m2 of ice-and/or snow-covered surface. The solid de-icing agent can be applied with the customary gritting vehicles.
The invention will now be illustrated in more detail by examples and comparison examples.
Example 1 A layer of ice 2 mm thick was produced in a refrigerating, chamber at a temperature of -5C. 100 g/m2 of sodium acetate which had the form of prills having a smooth surface, a diameter of 0.8 to 2 mm and a water content of 9% by weight were applied uniformly to the layer of ice.
After an action time of 30 minutes at the stated -5C, the ice which was still present and had not melted was weighed and the weight of this amount of ice was sub-tracted from the weight of the original amount of ice to determine the proportion of melted ice (water formed) as a percentage by weight, based on the original amount of ice.
Result:
After an action time of 30 minutes at -5C, 26% by weight of ice had melted.
Example 2 The procedure was as in Example 1, with the difference that a sodium acetate which had the form of prills having a smooth surface area, a diameter of 0.8 to 2 mm and a water content of 4.5% by weight was applied.
Result:
After an action time of 30 minutes at -5C, 30% by weight of the ice had melted.
2û99483 Example 3 The procedure was as in Example 1, with the difference that a sodium acetate which had the form of prills having a smooth surface area, a diameter of 0.8 to 2 mm and a water content of 0.1% by weight was applied.
Result:
After an action time of 30 minutes at -5C, 35~ by weight of the ice had melted.
Comparison Example 1 The procedure was as in Example 1, with the difference that a sodium acetate which had the form of prills having a smooth surface area, a diameter of 0.8 to 2 mm and a water content of 18% by weight was applied.
Result:
After an action time of 30 minutes at -5C, 20% by weight of the ice had melted.
Comparison Example 2 The procedure was as in Example 1, with the difference that a calcium magnesium acetate which had the form of prills having a smooth surface area, a diameter of 0.8 to 2 mm and a water content of 4.8% by weight was applied.
.
Result:
After an action time of 30 minutes at -5C, 6% by weight of the ice had melted.
'
HOECHST AKTIENGESELLSCHAFT HOE 92/F 913 Dr.GL-nu Werk Gendorf Process for melting snow and/or ice using an alkali metal carboxylate Description The invention relates to a process for melting snow and/or ice on traffic surfaces by application of a specific alkali metal carboxylate.
Snow and/or ice on roads, cycle paths, footpaths, bridges, sportsgrounds, airports and the like (called traffic surfaces below) lead to a considerable impairment in traffic flow and traffic safety. It has therefore already been known for a long time to apply water-soluble salts to such surfaces, ice and ænow melting (thawing) and an aqueous solution of the salt of correspondingly reduced freezing point being formed.
If salts are employed as de-icing agents, the following requirements above all should be met: the salt should not damage or even decompose the material from which the surfaces mentioned are constructed, for example concrete.
It is furthermore essential that a corrosive action on metals also is excluded. ~he salt should be acceptable to humans and animals and have a good biodegradability. ~he salt employed should cause rapid thawing as substantially as possible. Finally, from the economic point of view, it is necessary that only a small amount of de-icing agent is required, that it costs little and that it is easy to store and easy to handle.
In view of the requirements mentioned, alkali metal and alkaline earth metal salts of organic acids are mentioned above all as advantageous de-icing agents in the prior art. U.S. Patent 4,855,071 thus describes alkali metal and/or alkaline earth metal carboxylates having l to 4 .
.
2099~83 carbon atoms, prepared by a particular process, as de-icing agents, an essentially anhydrous calcium/magnesium acetate being recommended in particular. European Patent Application 0 483 721 Al describes a liquid de-icing S agent which essentially comprises water, an alkali metal acetate and/or alkaline earth metal acetate and specific corrosion inhibitors.
Although the known de-icing agents based on alkali metal carboxylates and/or alkaline earth metal carboxylates meet most of the abovementioned requirements, they leave something to be desired in particular in the following respect: the action of a salt as a de-icing agent is based, as already mentioned above, on the reduction in the freezing point of water by the salt. Another process which occurs here is thawing (melting) of the ice and/or snow, which requires energy and leads to severe, although short-term, cooling (cold shock) of the immediate environment, since the ener~y required (heat of fusion) is withdrawn therefrom. This results not only in a delay in the thawing process, but also in more or less severe damage to the traffic surface covering. The water in the top layer, of for example a concrete covering, in fact undergoes sudden formation of ice and therefore an increase in volume because of the cold shock mentioned, and this can lead to the particular top layer of the concrete cracking open. The action of the alkali metal and alkaline earth metal carboxylates hitherto described as de-icing agents is thus based only on the action of these salts in reducing the freezing point when dissolved in water.
The object of the invention accordingly is to propose, from the large number of de-icing agents in the form of alkali metal and~or alkaline earth metal carboxylates, which are advantageous per se, one w~ich has a high action in respect of reduction in the freezing point and releases heat in an exothermic reaction during the process of thawing (melting) of ice and snow, whereby the 2099~3 heat of fusion of ice and snow will be more or less compensated and the cold shock mentioned will therefore be reduced or even eliminated completely. This salt furthermore should be particularly ecologically and physiologically acceptable, have no corrosive action on metals and the covering of the traffic surfaces, be readily biodegradable and be easy to handle and store.
Such a salt would be desirable, above all, in all cases where rapid thawing of ice and/or snow and at the same time only slight, if any, cooling (low cold shock) of the environment are important.
It has been found, surprisingly, that a certain alkali metal carboxylate, and in particular a specific sodium salt of acetic acid, has all the required properties when used as a de-icing agent.
The process according to the invention for melting snow and/or ice on traffic surfaces comprises applying to the traffic surfaces covered with snow and/or ice an effective amount of a sodium acetate which is essentially anhydrous and is in the form of particles having a smooth surface and a diameter of 0.3 to 10 mm.
A sodium acetate which has a combination of quite parti-cular features is thus employed in the process according to the invention. It is a sodium acetate which has been dried to a very low water content. It should contain less - than 10% by weight, preferably less than 5% by weight, and in particular less than 0.5% by weight of water (the percentages by weight relate to the weight of the sodium acetate to be employed). Taking into account the economics of preparation and storage of dry (anhydrous) sodium acetate, a sodium acetate which contains only about 0.05 to 10% by weight of water, preferably 0.05 to 5% by weight and in particular about 0.05 to 0.5% by weight of water will be employed (the percentages by weight relate to the sodium acetate to be employed). The sodium acetate proposed according to the invention 2099~83 furthermore should have a selected morphology. It should be in the form of particles (granules), preferably in the form of grains, beads or prills, in particular in the form of beads or prills, the particles having a diameter of about 0.3 to 10 mm, preferably 0.5 to 5 mm and in particular about 1 to 3 mm. The surface of the particles should be essentially smooth, that is to say not rough or porous or the like.
The sodium acetate to be employed according to the invention is prepared by mixing acetic acid and aqueous, sodium hydroxide solution essentially stoichiometrically and drying the aqueous sodium acetate solution in a spray granulator to give the particles to be employed according to the invention. The acetic acid is preferably employed in the form of a 90 to 99.9% strength by weight aqueous solution and the sodium hydroxide is employed in the form of a 30 to 50~ strength by weight aqueous solution (aqueous sodium hydroxide solution). Acetic acid and the sodium hydroxide are preferably employed in an amount such that the resulting sodium acetate solution has a pH
of 7 to 11. Mixing of the aqueous acetic acid and aqueous sodium hydroxide solution and, if appropriate, additional water is preferably carried out at a temperature of 40 to 90C, the heat of neutralization being removed by cool-ing. The resulting aqueous sodium acetate solution as arule comprises 30 to 65% by weight of sodium acetate, preferably 40 to 60% by weight, the percentages by weight being based on the weight of the aqueous solution. A true (unsaturated, lew-viscosity, clear) solution of sodium acetate in water is thus present (based on the stated temperature of 40 to 90C). The particles to be employed according to the invention are obtained from this specific sodium acetate solution in a customary spray granulator (spray dryer). For this, the aqueous sodium acetate solution is sprayed in a granulator with one or more jets and is dried with the aid of air or nitrogen at a temperature of preferably 100 to 130C. It has proved advantageous if sodium acetate particles are already _ 5 _ 2~99 4 8 3 present in the fluidized state in the spray-dryer at the start of spraying of the sodium acetate solution described, the sodium acetate solution then being sprayed onto these particles. The particle material (granules) falling down in and discharged from the granulator in the form of, preferably, beads or prills has the smooth surface required according to the invention and the degree of dryness required according to the invention.
The particle size required according to the invention is also obtained by separating off (sieving) the small and large particles in the particle material.
The sodium acetate of low surface area proposed according to the invention is a particularly advantageous de-icing agent because of its low water content and its specific morphology. It meets all the abovementioned requirements, such as ecological and physiological acceptability, no corrosive action on metals and traffic surface coverings, good biodegradability and easy handling and storage (the sticking together feared as a result of hygroscopy does not occur). The sodium acetate proposed according to the invention above all also meets the requirements of a rapid thawing action and only slight, if any, cooling of the environment. In particular, it effects not only a large reduction in the freezing point, but also liberates heat of solution, which means that the melting of ice and snow is accelerated and proceeds without the cold shock mentioned occurring. Furthermore, because of these special properties, a high preventive effect is also achieved. A particularly advantageous de-icing agent is thus available with the sodium acetate proposed according to the invention.
In the process according to the invention for melting snow and/or ice on traffic surfaces, an active amount of the solid de-icing agent described is applied to the traffic surface to be treated, that is to say an amount such that the required melting or thawing of ice and/or snow is achieved. This amount depends above all on the - 6 _ 2099483 external temperature and the amount of ice and/or snow present, and is in general 10 to 400 g per m2 of ice-and/or snow-covered surface. The solid de-icing agent can be applied with the customary gritting vehicles.
The invention will now be illustrated in more detail by examples and comparison examples.
Example 1 A layer of ice 2 mm thick was produced in a refrigerating, chamber at a temperature of -5C. 100 g/m2 of sodium acetate which had the form of prills having a smooth surface, a diameter of 0.8 to 2 mm and a water content of 9% by weight were applied uniformly to the layer of ice.
After an action time of 30 minutes at the stated -5C, the ice which was still present and had not melted was weighed and the weight of this amount of ice was sub-tracted from the weight of the original amount of ice to determine the proportion of melted ice (water formed) as a percentage by weight, based on the original amount of ice.
Result:
After an action time of 30 minutes at -5C, 26% by weight of ice had melted.
Example 2 The procedure was as in Example 1, with the difference that a sodium acetate which had the form of prills having a smooth surface area, a diameter of 0.8 to 2 mm and a water content of 4.5% by weight was applied.
Result:
After an action time of 30 minutes at -5C, 30% by weight of the ice had melted.
2û99483 Example 3 The procedure was as in Example 1, with the difference that a sodium acetate which had the form of prills having a smooth surface area, a diameter of 0.8 to 2 mm and a water content of 0.1% by weight was applied.
Result:
After an action time of 30 minutes at -5C, 35~ by weight of the ice had melted.
Comparison Example 1 The procedure was as in Example 1, with the difference that a sodium acetate which had the form of prills having a smooth surface area, a diameter of 0.8 to 2 mm and a water content of 18% by weight was applied.
Result:
After an action time of 30 minutes at -5C, 20% by weight of the ice had melted.
Comparison Example 2 The procedure was as in Example 1, with the difference that a calcium magnesium acetate which had the form of prills having a smooth surface area, a diameter of 0.8 to 2 mm and a water content of 4.8% by weight was applied.
.
Result:
After an action time of 30 minutes at -5C, 6% by weight of the ice had melted.
'
Claims (7)
1. A process for melting snow and/or ice on traffic surfaces, which comprises applying to the traffic surfaces covered with snow and/or ice an effective amount of a sodium acetate which is essentially anhydrous and is in the form of particles having a smooth surface and a diameter of 0.3 to 10 mm.
2. The process as claimed in claim 1, wherein a sodium, acetate which contains less than 10% by weight of water and has the form of beads or prills having a smooth surface and a diameter of 0.3 to 10 mm is applied.
3. The process as claimed in claim 1, wherein a sodium acetate which contains less than 5% by weight of water and has the form of beads or prills having a smooth surface and a diameter of 0.5 to 5 mm is applied.
4. The process as claimed in claim 1, wherein a sodium acetate which contains less than 0.5% by weight of water and has the form of beads or prills having a smooth surface and a diameter of 1 to 3 mm is applied.
5. The process as claimed in one or more of claims 1 to 4, wherein a sodium acetate prepared by mixing acetic acid and an aqueous sodium hydroxide solution in an essentially stoichiometric amount and drying the resulting aqueous sodium acetate solution in a spray granulator to give sodium acetate particles having the features described in claims 1 to 4 is applied.
6. The process as claimed in one or more of claims 1 to 4, wherein a sodium acetate prepared by mixing 90 to 99.9% strength by weight aqueous acetic acid and 30 to 50% strength by weight aqueous sodium hydroxide solution and, if appropriate, additional water at a temperature of 40 to 90°C in each case in an amount such that the resulting aqueous sodium acetate solution has a pH of 7 to 11 and contains 40 to 60% by weight of sodium acetate, and drying this sodium acetate solution in a spray granulator with the aid or air or nitrogen at a temperature of 100 to 130°C to give sodium acetate particles having the features described in claims 1 to 4 is applied.
7. The process as claimed in one or more of claims 1 to 6, wherein the sodium acetate is applied in an amount, of 10 to 400 g per m2 to an ice- and/or snow-covered surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4221661.3 | 1992-07-02 | ||
| DE4221661A DE4221661A1 (en) | 1992-07-02 | 1992-07-02 | Process for melting snow and / or ice with an alkali metal carboxylate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2099483A1 true CA2099483A1 (en) | 1994-01-03 |
Family
ID=6462280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002099483A Abandoned CA2099483A1 (en) | 1992-07-02 | 1993-06-30 | Process for melting snow and/or ice using an alkali metal carboxylate |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0579014B1 (en) |
| AT (1) | ATE129281T1 (en) |
| CA (1) | CA2099483A1 (en) |
| DE (2) | DE4221661A1 (en) |
| DK (1) | DK0579014T3 (en) |
| FI (1) | FI105339B (en) |
| NO (1) | NO302035B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6955770B2 (en) | 2001-12-11 | 2005-10-18 | Clariant Gmbh | De-icing agent and method for melting snow and ice |
| RU2674142C1 (en) * | 2018-08-27 | 2018-12-05 | Михаил Семенович Гурович | Method of obtaining granulated trihydrate of sodium acetate |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10118685C2 (en) | 2001-04-14 | 2003-04-24 | Clariant Gmbh | Deicing agent and method for melting snow and ice |
| DE10118684C1 (en) | 2001-04-14 | 2003-01-02 | Clariant Gmbh | Corrosion inhibitor for bath water containing sodium chloride and magnesium sulfate and its use |
| WO2007096690A1 (en) * | 2006-02-22 | 2007-08-30 | Advanced Technologies (For) Road Applications (A.T.R.A.) Sa | Anti-ice and anti-snow composition for road pavings |
| DE102010028583B4 (en) * | 2009-05-11 | 2015-04-23 | Frank Prissok | Degradation of polyurethanes in the presence of special ionic liquids and a low water content |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1111936A (en) * | 1966-01-28 | 1968-05-01 | Distillers Co Yeast Ltd | De-icer composition |
| US4400285A (en) * | 1982-04-12 | 1983-08-23 | Gancy Alan B | Water-activated exothermic chemical deicing formulations |
| US4425251A (en) * | 1982-04-12 | 1984-01-10 | Gancy A B | Water-activated exothermic chemical formulations |
| US4488978A (en) * | 1983-02-10 | 1984-12-18 | Gancy Alan B | Coarse-particle calcium/magnesium acetate suitable for roadway and walkway deicing, and process for its manufacture |
| JP2507504B2 (en) * | 1987-01-14 | 1996-06-12 | ジェネラル アトミックス インターナショナル サービシズ コーポレイション | Deicing composition containing calcium magnesium acetate double salt and process for producing the same |
-
1992
- 1992-07-02 DE DE4221661A patent/DE4221661A1/en not_active Withdrawn
-
1993
- 1993-06-25 AT AT93110174T patent/ATE129281T1/en not_active IP Right Cessation
- 1993-06-25 DE DE59300779T patent/DE59300779D1/en not_active Expired - Fee Related
- 1993-06-25 EP EP93110174A patent/EP0579014B1/en not_active Expired - Lifetime
- 1993-06-25 DK DK93110174.5T patent/DK0579014T3/en active
- 1993-06-30 FI FI933015A patent/FI105339B/en not_active IP Right Cessation
- 1993-06-30 CA CA002099483A patent/CA2099483A1/en not_active Abandoned
- 1993-07-01 NO NO932401A patent/NO302035B1/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6955770B2 (en) | 2001-12-11 | 2005-10-18 | Clariant Gmbh | De-icing agent and method for melting snow and ice |
| RU2674142C1 (en) * | 2018-08-27 | 2018-12-05 | Михаил Семенович Гурович | Method of obtaining granulated trihydrate of sodium acetate |
Also Published As
| Publication number | Publication date |
|---|---|
| NO302035B1 (en) | 1998-01-12 |
| NO932401L (en) | 1994-01-03 |
| ATE129281T1 (en) | 1995-11-15 |
| DE59300779D1 (en) | 1995-11-23 |
| EP0579014A1 (en) | 1994-01-19 |
| FI933015A (en) | 1994-01-03 |
| NO932401D0 (en) | 1993-07-01 |
| FI933015A0 (en) | 1993-06-30 |
| DE4221661A1 (en) | 1994-01-05 |
| FI105339B (en) | 2000-07-31 |
| DK0579014T3 (en) | 1996-02-05 |
| EP0579014B1 (en) | 1995-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0077767B1 (en) | Antifreeze and thawing agent, process for deicing frozen surfaces like streets, roads or the like or for preventing icing | |
| US5730895A (en) | Carboxylate coated chloride salt ice melters | |
| US5922241A (en) | Corrosion-inhibited deicing composition based on alkali metal and/or alkaline earth metal halides, and method of melting snow and ice on traffic areas using the composition | |
| US7879254B2 (en) | Snow removal agent and preparation method | |
| NO914287L (en) | LIQUID DISTRIBUTION BASED ON ACETATES AND PROCEDURE FOR MELTING SNOW AND ICE IN TRAFFIC AREAS USED BY THIS AGENT | |
| JPS60195178A (en) | Anti-freeze and dust-preventing agent | |
| US3185648A (en) | Deicer composition | |
| CA3023013C (en) | Eco-friendly snow removal composition comprising porous structure from starfish | |
| JP2000511958A (en) | Deicing agent based on acetate and / or formate, and method for melting snow and ice in traffic areas using this agent | |
| CA2099483A1 (en) | Process for melting snow and/or ice using an alkali metal carboxylate | |
| CA2284366C (en) | Method of melting snow and/or ice and a deicer comprising sodium formate and sodium chloride | |
| JP2001187881A (en) | Non-chloride based deicer composition and its preparation process | |
| JPH10251622A (en) | Antifreezing agent and particle thereof | |
| KR100685487B1 (en) | Deicer including ceramic and process for preparation thereof | |
| JP3566822B2 (en) | Formulation of road deicing agent | |
| US3227654A (en) | Deicer composition | |
| KR0155139B1 (en) | Deicing agents and process of making the same | |
| JP3804700B2 (en) | Antifreeze | |
| JP2000034472A (en) | Inorganic chloride-based snow-melting agent | |
| RU2172332C2 (en) | Agent based on acetates and/or formates for removing ice and method of melting out snow and ice road surfaces using said agent | |
| JP2858396B2 (en) | Anti-icing pavement material | |
| JPH0371473B2 (en) | ||
| JP4447124B2 (en) | Snow melting agent | |
| JPH07278531A (en) | Snow melting agent composition | |
| JPS5859280A (en) | Antifreezing agent for soil and production thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |