Deicing composition and use thereof
Disclosed is a novel deicing composition having improved corrosion inhibition and being obtained by mixing 89-99.98% by weight of an alkali metal formate 0.01-6% by weight of an alkali metal silicate and 0.01-5% by weight of a C 4 -C 19 alkyl carboxylic acid, said weight percentages being calculated on dry substances.
1. A deicing composition which comprises 89-99.98% by weight of a alkali metal formate, 0.01-6% by weight of an alkali metal silicate and 0.01-5% by weight of a C 4 -C 19 alkyl carboxylic acid, said weight percentages being calculated on dry substances.
2. A deicing composition according to claim 1 which is obtained by mixing 98-99.98% by weight of a alkali metal formate, 0.01-1% by weight of an alkali metal silicate and 0.01-1% by weight of a C 4 -C 19 alkyl carboxylic acid, said weight percentages being calculated on dry substances.
3. A deicing composition according to claim 1 wherein said alkali metal formate is added in an amount of 99-99.98%, by weight.
4. A deicing composition according to claim 1 wherein said alkali metal silicate is added in an amount of 0.05-0.5% by weight.
5. A deicing composition according to claim 1 wherein said alkyl carboxylic acid is added in an amount of 0.01-0.5%, by weight.
6. A deicing composition according to claim 1 wherein said alkali metal formate is potassium or sodium formate.
7. A deicing composition according to claim 1 wherein said alkali metal silicate is an alkali metal metasilicate.
8. A deicing composition according to claim 7 wherein alkali metal metasilicate is potassium or sodium metasilicate.
9. A deicing composition according to claim 1 wherein said alkyl carboxylic acid is C 6 -C 12 alkyl carboxylic acid.
10. A deicing composition according to claim 1 wherein alkyl carboxylic acid is selected from the group consisting of is valeric acid, capric acid, caprylic acid, caproic acid, decanoic acid, dodecanoic acid, hexanoic acid, 2-ethyl hexanoic acid and octanoic acid.
11. A deicing composition according to claim 1 wherein an alkali metal base, is added.
12. A deicing composition according to claim 11 wherein said alkali metal base is potassium or sodium hydroxide.
13. A deicing composition according to claim 11 wherein said alkali metal base is added in an amount equivalent to said alkyl carboxylic acid.
14. A deicing composition according to claim 1 further including an alkali metal phosphate.
15. A deicing composition according to claim 1 wherein alkali metal phosphate is added in an amount of 0.01-1% by weight, calculated on said alkali metal formate.
16. A deicing composition according to claim 15 wherein said alkali metal phosphate is potassium or sodium phosphate.
17. The deicing composition of claim 3 wherein said alkali metal formate is added in an amount of 99.4-99.94% by weight.
18. The deicing composition of claim 5 wherein said alkyl carboxylic acid is added in an amount of 0.01-0.1%, by weight.
19. The deicing composition of claim 11 wherein the alkali metal base is at least one selected from the group consisting of alkali metal hydroxide, alkoxide and carbonate.
20. A method of deicing, comprising applying a deicing composition according to claim 1 , in areas in need of deicing and/or anti-icing.
21. A method of deicing, comprising applying a deicing composition according to claim 1 , in deicing and/or anti-icing of airfields, airfield runways and taxiways.
22. A method of deicing, comprising applying a deicing composition according to claim 1 , in deicing and/or anti-icing of streets, roads, cycle ways, footpaths, bridges, backyards, parking areas and sports grounds.
23. A method of deicing, comprising applying a deicing composition according to claim 1 , as an aqueous solution comprising 5-60%, by weight of said composition.
24. The method of claim 23 wherein said aqueous solution comprise 20-40% by weight of said component.