Deicing composition

Abstract

A deicing composition is provided. The composition includes a potassium or sodium salt of a carboxylic acid and a lithium salt of a carboxylic acid or lithium nitrate, wherein the molar ratio of lithium to potassium or lithium to sodium is from 10 percent to 80 percent.

1 . A deicing composition comprising: 
 a) a potassium or sodium salt of a carboxylic acid; and    b) a lithium salt of a carboxylic acid or a lithium nitrate, wherein the molar ratio of lithium to potassium or lithium to sodium is from 10 percent to 80 percent.    
   
   
       2 . The deicing composition according to  claim 1 , wherein the carboxylic acid is selected from the group consisting of formic, acetic, propionic, glycolic, and lactic acids, or mixtures thereof.  
   
   
       3 . A deicing composition according to  claim 1  further comprising a corrosion inhibitor.  
   
   
       4 . A deicing composition according to  claim 3  wherein the corrosion inhibitor is a phosphonic acid derivative.  
   
   
       5 . A deicing composition according to  claim 3  wherein the corrosion inhibitor is a phosphate or a nitrate.  
   
   
       6 . A deicing composition for concrete surfaces comprising an alkali metal salt of a carboxylic acid and an alkali metal nitrate.  
   
   
       7 . The deicing composition according to  claim 6 , wherein alkali metal salt of a carboxylic acid is selected from the group consisting of potassium, sodium and lithium salts of formic, acetic, propionic, glycolic and lactic acids, or mixtures thereof.  
   
   
       8 . A deicing composition according to  claim 6  further comprising a corrosion inhibitor.  
   
   
       9 . The deicing composition according to  claim 6 , wherein alkali metal salt of a carboxylic acid is potassium or sodium acetate and the alkali metal nitrate is lithium nitrate.  
   
   
       10 . The deicing composition according to  claim 6 , wherein the ratio of alkali metal of the alkali metal salt of a nitrate to the alkali metal of the alkali metal salt of a carboxylic acid is 0.10 to 0.80.  
   
   
       11 . A deicing composition comprising: 
 a) a metal halide salt; and    b) a lithium salt of a carboxylic acid or a lithium nitrate, wherein the molar ratio of lithium to potassium or lithium to sodium is from 10 percent to 80 percent.    
   
   
       12 . A deicing composition according to  claim 11  further comprising a corrosion inhibitor.  
   
   
       13 . A deicing composition according to  claim 12  wherein the corrosion inhibitor is a phosphonic acid derivative.  
   
   
       14 . A deicing composition according to  claim 11 , wherein the metal of the metal halide salt is selected from the group consisting of potassium, sodium, magnesium, and calcium.  
   
   
       15 . A deicing composition according to  claim 12 , wherein the corrosion inhibitor is a phosphate or a nitrate.  
   
   
       16 . A method of deicing concrete surfaces comprising applying a deicing composition comprising a potassium or sodium salt of a carboxylic acid and a lithium salt of a carboxylic acid to a concrete surface.  
   
   
       17 . A method of deicing concrete surfaces comprising applying a deicing composition comprising a metal halide salt and a lithium salt of a carboxylic acid or a lithium nitrate, wherein the molar ratio of lithium to potassium or lithium to sodium is from 10 percent to 80 percent.  
   
   
       18 . In a deicing composition that can cause ASR damage to the concrete being deiced, the improvement comprising adding a lithium salt of a carboxylic acid or a lithium nitrate at a percent solids level such that the eutectic point of the deicing composition is not lowered to avoid adversely affecting deicing characteristics of the deicing composition.