Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2007-04-25
2010-11-02
McKane, Joseph K. (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C548S402000
Reexamination Certificate
active
07825259
ABSTRACT:
The reaction of N-alkylimidazol with alkyl sulfonates, at room temperature, favors the production of 1,3-dialkylimidazolium alkane-sulfonates as crystalline solids at high yields. The alkane-sulfonate anions may be easily substituted by a series of other anions [BF4, PF6, PF3(CF2CF3)3, CF3SO3and (CF3SO2)2N] through simple anion, salt, or acid reactions in water at room temperature. The extraction with dichloromethane, filtration, and evaporation of the solvent, allows the production of the desired ionic liquids at a yield of 80-95%. The purity of these ionic liquids (in some cases >99.4%) is performed using the intensity of13C satellite signals from the magnetic resonance spectrums of the N-methyl imidazolium group as an internal standard.
REFERENCES:
patent: WO 01/40146 (2001-06-01), None
patent: WO 03/074494 (2003-09-01), None
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Cassol Cláudia Cristiana
Dupont Jairton
Ebeling Gunter
Ferrera Bauer Costa
Coppins Janet L
McKane Joseph K.
Nixon & Vanderhye P.C.
Petroleo Brasileiro S.A. - Petrobras
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