Method of preparation of halogen-free ionic liquids and ionic liquids prepared in this manner
申请人:Cassol Claudia Cristiana
公开号:US20080045723A1
公开(公告)日:2008-02-21
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 [BF
4
, PF
6
, PF
3
(CF
2
CF
3
)
3
, CF
3
SO
3
and (CF
3
SO
2
)
2
N] 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 of
13
C satellite signals from the magnetic resonance spectrums of the N-methyl imidazolium group as an internal standard.
N-烷基咪唑与烷基磺酸盐在室温下反应,有利于高产率地生成1,3-二烷基咪唑烷磺酸盐作为结晶固体。烷磺酸盐阴离子可以通过简单的阴离子、盐或酸反应在室温下在水中轻松被一系列其他阴离子[BF
4
, PF
6
, PF
3
(CF
2
CF
3
)
3
, CF
3
SO
3
和(CF
3
SO
2
)
2
N]所取代。用二氯甲烷萃取、过滤和溶剂蒸发,可以以80-95%的产率生产所需的离子液体。这些离子液体的纯度(在某些情况下>99.4%)是通过使用N-甲基咪唑基团的
13
C卫星信号强度作为内部标准来进行的。