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    • 52. 发明授权
    • Method for preparing high-purity ionic liquids
    • 制备高纯度离子液体的方法
    • US06852229B2
    • 2005-02-08
    • US10277420
    • 2002-10-22
    • Christian P. MehnertNicholas C. DispenziereRaymond A. Cook
    • Christian P. MehnertNicholas C. DispenziereRaymond A. Cook
    • B01J31/02C07C45/50C07D213/20C07D521/00B01D11/04
    • C07D213/20B01J31/0234C07D231/12C07D233/56C07D249/08
    • A method for preparing a high-purity ionic liquid having a pH value of 7 and an elemental analysis deviation of less than 0.5 wt % between a calculated elemental analysis and a found elemental analysis for each of carbon, hydrogen and nitrogen, wherein the method comprises forming a monophasic or biphasic mixture of an ionic liquid and an inert liquid. When the monophasic mixture is formed, it is filtered to yield a filtrate from which the high-purity ionic liquid is recovered. When the biphasic mixtures is formed, it is separated into an aqueous phase and ionic liquid phase, whereby the ionic liquid phase is filtered to yield a filtrate from which the high-purity ionic liquid is recovered. Furthermore, the present purification procedure can be used for the clean-up of a contaminated ionic liquid by extracting it into a polar extractant to form an extract containing the ionic liquid. Water traces are removed from the extract. Then, the extract is filtered and the high-purity ionic liquid is recovered from the filtered extract.
    • 在计算的元素分析和针对碳,氢和氮各自的元素分析中,制备pH值为7并且元素分析偏差小于0.5重量%的高纯度离子液体的方法,其中所述方法包括 形成离子液体和惰性液体的单相或双相混合物。 当形成单相混合物时,将其过滤以产生从其中回收高纯度离子液体的滤液。 当形成双相混合物时,将其分离成水相和离子液相,由此过滤离子液相以产生从其中回收高纯度离子液体的滤液。 此外,本纯化方法可用于通过将污染的离子液体提取到极性萃取剂中以形成含有离子液体的提取物来清理污染的离子液体。 从提取物中除去水迹。 然后,将提取物过滤并从过滤的提取物中回收高纯度离子液体。