Method for preparing freezing point depressant composition

Abstract

The invention relates a method for preparing a composition with low corrosive effect and low freezing point, by mixing an ammonium cation source with a carboxyl anion source in an appropriate molar or weight ratio, either without a medium or by using an appropriate medium for obtaining liquid or water-soluble organic ammonium carboxylate of formula (1): [NR 1 R 2 R 3 R 4 ] + n [R 5 (COO) n ] −n ,   (1), in which R 1 , R 2 , and R 3 are selected from the group comprising hydrogen, substituted and unsubstituted alkyls containing 1-6 carbon atoms, R 4 is a substituted or unsubstituted alkyl containing 1-6 carbon atoms, R 5 is hydrogen, a substituted or unsubstituted hydrocarbon containing 1-6 carbon atoms and n is an integral 1-6 and thereafter adding possible solvent and at the same time keeping alkali or alkali-earth metal content of the composition in a range of 0.001-30 wt-%, preferably in a range of 0.001-30 wt-% and most preferably in a range of 0.001-1.0 wt-% and halide content in a range of 0.001-1 wt-% most preferably in a range of 0.001-0.1 wt-%.

1 . A method for preparing a composition with low corrosive effect and low freezing point, by mixing an ammonium cation source with a carboxyl anion source in an appropriate molar or weight ratio, either without a medium or by using an appropriate medium for obtaining liquid or water-soluble organic ammonium carboxylate of formula (1):
   [NR 1 R 2 R 3 R 4 ] +   n  [R 5 (COO) n ] −n ,   (1),
   
       in which R 1 , R 2 , and R 3  are selected from the group comprising hydrogen, substituted and unsubstituted alkyls containing 1-6 carbon atoms, R 4  is a substituted or unsubstituted alkyl containing 1-6 carbon atoms, R 5  is hydrogen, a substituted or unsubstituted hydrocarbon containing 1-6 carbon atoms and n is an integral 1-6 and
 thereafter adding possible solvent and at the same time keeping alkali or alkali-earth metal content of the composition in a range of 0.001-30 wt-%, preferably in a range of 0.001-30 wt-% and most preferably in a range of 0.001-1.0 wt-% and halide content in a range of 0.001-1 wt-% most preferably in a range of 0.001-0.1 wt-%. 
 
     
     
         2 . The method as defined in  claim 1 , characterized in that R 5  is hydrogen, a substituted or unsubstituted alkyl containing 1-6 carbon atoms, preferably hydrogen, a substituted or unsubstituted alkyl containing 1-4 carbon atoms, and n is 1 or 2, preferably 1. 
     
     
         3 . The method as defined in  claim 2 , characterized in that R 5  is hydrogen, methyl or ethyl. 
     
     
         4 . The method as defined in  claim 2 , characterized in that R 1  is hydrogen, R 2  and R 3  are selected from the group comprising hydrogen and C 1 -C 6  alkyls substituted with a hydroxyl group, preferably in the group comprising hydrogen and C 1 -C 4 -alkyls substituted with a hydroxyl group, and R4 is a C 1 -C 6 -alkyl substituted with a hydroxyl group, preferably a C 1 -C 4 -alkyl substituted with a hydroxyl group. 
     
     
         5 . The method as defined in  claim 4 , characterized in that Ri is hydrogen, R 2  and R 3  are selected from the group comprising hydrogen and ethyl substituted with a hydroxyl group, preferably in the group comprising hydrogen and 2-hydroxyethyl, and R 4  is an ethyl substituted with a hydroxyl group, preferably 2-hydroxy ethyl. 
     
     
         6 . The method as defined in  claim 1 , characterized in that the organic ammonium carboxylate of formula (1) is a salt of formic acid and monoethanolamine and/or triethanolamine or a salt of lactic acid and monoethanolamine and/or triethanolamine. 
     
     
         7 . The method as defined in  claim 6 , characterized in that the organic ammonium carboxylate of formula (1) is a mixture of a salt of formic acid or lactic acid and monoethanolamine, preferably in the weight ratio 80:20-20:80. 
     
     
         8 . The method as defined in  claim 1 , characterized in that the organic ammonium carboxylate of formula (1) is prepared in the form of an aqueous solution preferably with water, in which the ammonium carboxylate concentration is in the range 0.5-100% wt-%, preferably 5-70% wt-% while the freezing point of the composition is kept in the range of −5 to −50° C. 
     
     
         9 . The method as defined in  claim 8 , characterized in that the prepared aqueous solution of organic ammonium carboxylate of formula (1) contains organic ammonium carboxylate of formula (1) and water in a weight ratio in the range 1:20-20:1, preferably in the range 1:6-1:1. 
     
     
         10 . The method as defined in any of  claims 1  to  9 , characterized in that into liquid or water-soluble organic ammonium carboxylate of formula (1) and possible solvent is additionally mixed an alkali metal, an alkaline earth metal or an ammonium salts of C 1 -C 6  monocarboxylic acids or urea or ethylene glycol or propylene glycol, or glycerol or a mixture thereof so that the composition contains 5 to 97.5 wt-% of water or alkali metal, an alkaline earth metal or an ammonium salts of C 1 -C 6  monocarboxylic acids or urea or ethylene glycol or propylene glycol, or glycerol or a mixture thereof provided that alkali or alkali-earth metal content is kept in a range of 0.001-30 wt-%. 
     
     
         11 . The method as defined in any of  claims 1  to  10 , characterized in that into the composition is included auxiliary substances such as additional corrosion inhibitors, biocides, coloring agents, surfactants, and viscosity intensifiers from 0.001 to 10 wt-%. 
     
     
         12 . The use of composition comprising liquid or water-soluble organic ammonium carboxylate of formula (1):
   [NR 1 R 2 R 3 R 4 ] +   n  [R 5 (COO) n ] −n ,   (1),
   
       in which R 1 , R 2 , and R 3  are selected from the group comprising hydrogen, substituted and unsubstituted alkyls containing 1-6 carbon atoms, R 4  is a substituted or unsubstituted alkyl containing 1-6 carbon atoms, R 5  is hydrogen, a substituted or unsubstituted hydrocarbon containing 1-6 carbon atoms and n is an integral 1-6 either without a medium or by using an appropriate medium, as a freezing point depressant. 
     
     
         13 . The use defined in  claim 12 , wherein R 5  is hydrogen, a substituted or unsubstituted alkyl containing 1-6 carbon atoms, preferably hydrogen, a substituted or unsubstituted alkyl containing 1-4 carbon atoms, and n is 1 or 2, preferably 1. 
     
     
         14 . The use as defined in  claim 13  wherein R 5  is hydrogen, methyl or ethyl. 
     
     
         15 . The use defined in  claim 14 , wherein R 1  is hydrogen, R 2  and R 3  are selected from the group comprising hydrogen and C 1 -C 6  alkyls substituted with a hydroxyl group, preferably in the group comprising hydrogen and C 1 -C 4 -alkyls substituted with a hydroxyl group, and R 4  is a C 1 -C 6 -alkyl substituted with a hydroxyl group, preferably a C 1 -C 4 -alkyl substituted with a hydroxyl group. 
     
     
         16 . The use defined in  claim 15 , wherein R 1  is hydrogen, R 2  and R 3  are selected from the group comprising hydrogen and ethyl substituted with a hydroxyl group, preferably in the group comprising hydrogen and 2-hydroxyethyl, and R 4  is an ethyl substituted with a hydroxyl group, preferably 2-hydroxy ethyl. 
     
     
         17 . The use defined in  claim 12 , wherein the organic ammonium carboxylate of formula (1) is a salt of formic acid and monoethanolamine and/or triethanolamine or a salt of lactic acid and monoethanolamine and/or triethanolamine. 
     
     
         18 . The use defined in  claim 17 , wherein the organic ammonium carboxylate of formula (1) is a mixture of a salt of formic acid or lactic acid and monoethanolamine, preferably in the weight ratio 80:20-20:80. 
     
     
         19 . The use as defined in  claim 12 , wherein the organic ammonium carboxylate of formula (1) is prepared in the form of an aqueous solution preferably with water, in which the ammonium carboxylate concentration is in the range 0.5-100% wt-%, preferably 5-70% wt-% while the freezing point of the composition is kept in the range of −5 to −50° C. 
     
     
         20 . The use as defined in  claim 19 , wherein the prepared aqueous solution of organic ammonium carboxylate of formula (1) contains organic ammonium carboxylate of formula (1) and water in a weight ratio in the range 1:20-20:1, preferably in the range 1:6-1:1. 
     
     
         21 . The use as defined in any of  claims 12  to  20 , wherein into liquid or watersoluble organic ammonium carboxylate of formula (1) and possible solvent is additionally mixed an alkali metal, an alkaline earth metal or an ammonium salts of C 1 -C 6  monocarboxylic acids or urea or ethylene glycol or propylene glycol, or glycerol or a mixture thereof so that the composition contains 5 to 97.5 wt-% of water or alkali metal, an alkaline earth metal or an ammonium salts of C 1 -C 6  monocarboxylic acids or urea or ethylene glycol or propylene glycol, or glycerol or a mixture thereof provided that alkali or alkali-earth metal content is kept in amount of 0.001-30 wt-%. 
     
     
         22 . The use as defined in any of  claims 12  to  21 , wherein into the composition is included auxiliary substances such as additional corrosion inhibitors, biocides, coloring agents, surfactants, and viscosity intensifiers from 0.001 to 10 wt-%. 
     
     
         23 . The use defined in  claim 12  wherein the composition is additionally used for deicing or anti-icing, heat storage or heat transfer, metal cutting, grease, NOx removal or as a hydraulic fluid. 
     
     
         24 . The use defined in  claim 23 , wherein the composition has a viscosity of 0.1-10,000 Mpas, its electrical conductivity is in a range of 1.0-100 mPas and said composition is used for lowering freezing point of an aquous system and additionally for deicing or anti-icing. 
     
     
         25 . The use defined in  claim 24  for airfield pavement deicing or aircraft deicing and anti-icing. 
     
     
         26 . The use defined in  claim 12  wherein the composition has viscocity of 0.1-500 mpas and electrical conductivity of 1.0-100 mS/cm and the composition is additionally used for a heat transfer application. 
     
     
         27 . The use according to  claim 26  wherein the composition contains formic acid, acetic acid or lactic acid and monoethanolamine. 
     
     
         28 . The use defined in  claim 12  wherein the composition is a grease-like composition with viscocity of 100-50,000 mpas and electrical conductivity of 0.05-100 mS/cm. 
     
     
         29 . The use defined in  claim 12  wherein the composition has viscocity of 5.0-10,000 mpas and electrical conductivity of 1.0-100 mS/cm and the composition is used as a hydraulic composition. 
     
     
         30 . The use defined in  claim 12  wherein the composition is additionally used for binding glycol ethers. 
     
     
         31 . The reuse of the composition defined in  claim 1  after it has been used for any of the uses defined in  claims 12 - 30 . 
     
     
         32 . The reuse of the composition defined in  claim 31  for treating wood material, dust controlling, additive for metal cutting or oil drilling, reicing of ice tracks, esterification or etherification of material for energy production.