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    • 9. 发明授权
    • Separation of dienes from olefins using ionic liquids
    • 使用离子液体从烯烃中分离二烯
    • US06849774B2
    • 2005-02-01
    • US10037044
    • 2001-12-31
    • Laura C. BoudreauMichael S. DriverCurt L. MunsonWilliam L. Schinski
    • Laura C. BoudreauMichael S. DriverCurt L. MunsonWilliam L. Schinski
    • C07C7/152C07C7/156C10G29/06C40B60/14C07C7/00C07C7/10C07C7/148
    • C10G29/06B01J2219/00308B01J2219/00313B01J2219/00756B01J2219/00759C07C7/152C07C7/156C40B60/14C07C11/00
    • Methods for separating di-olefins from mono-olefins, and olefins from non-olefins such as paraffins, oxygenates and aromatics; are provided. The methods use metal salts which complex both mono-olefins and di-olefins, but which selectively complex di-olefins in the presence of mono-olefins. The metal salts are dissolved or suspended in ionic liquids, which tend to have virtually no vapor pressure. Preferred salts are Group IB salts, more preferably silver and copper salts. A preferred silver salt is silver tetrafluoroborate. A preferred copper salt is silver CuOTf. Preferred ionic liquids are those which form stable solutions, suspensions or dispersions of the metal salts, which do not dissolve unwanted non-olefins, and which do not isomerize the mono- or di-olefins. The equivalents of the metal salt can be adjusted so that di-olefins are selectively adsorbed from mixtures of mono- and di-olefins. Alternatively, both mono- and di-olefins can be adsorbed, and the mono-olefins selectively desorbed. The latter approach can be preferred when non-olefins are also to be separated. The mono- and di-olefin-containing mixture can be in the gas phase or in the liquid phase. The flow of mono- and di-olefin-containing mixture over/through the ionic liquid can be, for example, co-current, counter-current, or staged in stirred tanks, with countercurrent being preferred.
    • 用于从单烯烃分离二烯烃的方法,以及来自非烯烃如链烷烃,含氧化合物和芳烃的烯烃; 被提供。 该方法使用复合单烯烃和二烯烃的金属盐,但是在单烯烃存在下选择性复合的二烯烃。 金属盐溶解或悬浮在离子液体中,其倾向于几乎不具有蒸气压。 优选的盐是IB族盐,更优选银和铜盐。 优选的银盐是四氟硼酸银。 优选的铜盐是银CuOTf。 优选的离子液体是形成不溶解不需要的非烯烃并且不使单烯烃或二烯烃异构化的金属盐的稳定溶液,悬浮液或分散体的离子液体。 可以调节金属盐的当量,使得二烯烃从单烯烃和二烯烃的混合物中选择性吸附。 或者,可以吸附单烯烃和二烯烃,并且单烯烃选择性解吸。 当非烯烃也被分离时,后一种方法可以是优选的。 含单烯烃和二烯烃的混合物可以处于气相或液相中。 通过离子液体流过单 - 和二烯烃混合物的流动可以是例如在搅拌釜中的并流,逆流或分级,优选逆流。