Patent ID: 7763186
Filing Date: 2010-07-27
Classification: B01D,B01J,C07C,C07D

Abstract:
1. A method for preparing a substantially nonfluorescent composition comprising ionic liquid that is a molten salt having a melting temperature at or below 100° C., comprising: heating a compound of the formula [cation-1][X] with charcoal or activated carbon, wherein X is a halide and [cation-1] is a quaternary ammonium cation of the formula wherein R1 is selected from alkyl having 2-10 carbons, or a cation of the formula wherein R 1 is alkyl having 2-10 carbons, or a cation of the formula wherein R 1 is alkyl having 2-10 carbons or a cation of the formula wherein R reacting the [cation-1][X] compound with a compound of the formula [cation-2] [Y] wherein [cation-2] is a cation and wherein [Y] is BF trifluoromethylsulfonate (CF 3 SO 3 − ), bis(trifluoromethylsulfonyl)imide ((CF 3 SO 2 ) 2 N − ), bis(perfluoroethylsulfonyl)imide ((CF 3 CF 2 SO 2 ) 2 N − ), or tris(trifluoromethylsulfonyl)methide ((CF 3 SO 2 ) 3 )C − ), thereby forming a substantially nonfluorescent composition comprising ionic liquid that is a molten salt having a melting temperature at or below 100° C.