Ionic liquids for cooling in high temperature environment

Abstract

Cooling medium comprising an ionic liquid with a hydrogen content of 0% to 8.5% by weight and its use.

1 . Cooling medium comprising an ionic liquid with a hydrogen content of 0% to 8.5% by weight. 
     
     
         2 . Cooling medium according to  claim 1  with a hydrogen content of 0% to 7% by weight. 
     
     
         3 . Cooling medium according to  claim 1 , with a hydrogen content of 0% to 6.5% by weight. 
     
     
         4 . Cooling medium according to  claim 1 , wherein the ionic liquid has a flash point of at least 200° C. determined according to DIN ISO 2592. 
     
     
         5 . Cooling medium according to  claim 4 , wherein the ionic liquid has a flash point of at least 250° C. determined according to DIN ISO 2592. 
     
     
         6 . Cooling medium according to  claim 1 , wherein the ionic liquid has a melting point from 40° C. and less. 
     
     
         7 . Cooling medium according to  claim 6 , wherein the ionic liquid has a melting point from −20° C. and below. 
     
     
         8 . Cooling medium according to  claim 1 , wherein the cation of the ionic liquid is selected from ammonium, phosphonium, pyridinium, pyrrolium, piperidinium, pyrrolidinium, morpholinium, (benz)imidazolium or pyrazolium. 
     
     
         9 . Cooling medium according to  claim 8 , wherein the cation of the ionic liquid is selected from imidazolium, benzimidazolium or phosphonium, optionally independently substituted by C1 to C4 alkyl, perfluoro C1 to C4 alkyl and/or by cyano. 
     
     
         10 . Cooling medium according to  claim 1 , wherein the anion of the ionic liquid comprises a hetero element. 
     
     
         11 . Cooling medium according to  claim 1 , wherein the anion of the ionic liquid contains 3 hydrogen atoms or less, in particular is hydrogen free. 
     
     
         12 . Cooling medium according to  claim 10 , wherein the anion of the ionic liquid is selected from diethylphosphate, triphenylphosphate, methansulfonate, trifluormethansulfonate, methylsulfate, ethylsulfate, SiF 6   2− , tetrachloroferrat-(III) and/or tetrafluoroborate. 
     
     
         13 . Cooling medium according to  claim 1 , further comprising dissolved salts with inorganic cations and organic or inorganic anions. 
     
     
         14 . Cooling medium according to  claim 1 , further comprising dissolved flame retardants 
     
     
         15 . A method of using a cooling medium according to  claim 1 , comprising using the cooling medium to cool at least one member selected from the group comprising:
 technical devices in high temperature environment,   metallurgical ovens and their aggregates,   ovens and aggregates in the glas and ceramic producing industry,   ovens and aggregates in the cement producing industry,   cooling of reactors and aggregates in gasification of organic matter and biofeedstocks,   ovens and aggregates in incineration plants,   reactors and aggregates in nuclear power plants,   combustion chambers and aggregates in conventional thermal power plants.