Process for separating components of azeotropic mixtures using ionic liquids
AssigneeUniversity of Kansas
InventorsMark Brandon Shiflett, Ana Rita Colaco Morais
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Abstract
Processes for separating an azeotropic mixture are provided. In an embodiment, such a process comprises exposing an azeotropic mixture comprising a first (hydro)fluorocarbon and a second (hydro)fluorocarbon to an ionic liquid comprising a cation and a non-fluorinated anion at a temperature and a pressure at which the ionic liquid absorbs more of one of the first and second (hydro)fluorocarbons than another of the first and second (hydro)fluorocarbons as determined on a mass basis to form a (hydro)fluorocarbon-containing ionic liquid and a processed azeotropic mixture.
Claims23
A process for separating an azeotropic mixture, the process comprising exposing an azeotropic mixture comprising a first (hydro)fluorocarbon and a second (hydro)fluorocarbon to an ionic liquid comprising a cation and a non-fluorinated anion at a temperature and a pressure at which the ionic liquid absorbs more of one of the first and second (hydro)fluorocarbons than another of the first and second (hydro)fluorocarbons as determined on a mass basis to form a (hydro)fluorocarbon-containing ionic liquid and a processed azeotropic mixture.
A process for separating an azeotropic mixture, the process comprising exposing an azeotropic mixture comprising difluoromethane and pentafluoroethane to an ionic liquid comprising a cation and a non-fluorinated anion at a temperature and a pressure at which the ionic liquid absorbs more of one of difluoromethane and pentafluoroethane than another of difluoromethane and pentafluoroethane as determined on a mass basis to form a (hydro)fluorocarbon-containing ionic liquid and a processed azeotropic mixture.
A process for separating an azeotropic mixture, the process comprising exposing an azeotropic mixture comprising pentafluoroethane and 1,1,1-trifluoroethane to an ionic liquid comprising a cation and a non-fluorinated anion at a temperature and a pressure at which the ionic liquid absorbs more of one of pentafluoroethane and 1,1,1-trifluoroethane than another of pentafluoroethane and 1,1,1-trifluoroethane as determined on a mass basis to form a (hydro)fluorocarbon-containing ionic liquid and a processed azeotropic mixture.
Dependencies are inferred from the claim text.