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Title: Ionic liquids for separation of olefin-paraffin mixtures

Patent ·
OSTI ID:1093550

The invention is directed to an ionic liquid comprising (i) a cationic portion containing a complex of a silver (I) ion and one or more neutral ligands selected from organoamides, organoamines, olefins, and organonitriles, and (ii) an anionic portion having the chemical formula ##STR00001## wherein m and n are independently 0 or an integer of 1 or above, and p is 0 or 1, provided that when p is 0, the group --N--SO.sub.2--(CF.sub.2).sub.nCF.sub.3 subtended by p is replaced with an oxide atom connected to the shown sulfur atom. The invention is also directed to a method for separating an olefin from an olefin-paraffin mixture by passing the mixture through a layer of the ionic liquid described above.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Number(s):
8,535,560
Application Number:
12/502,695
OSTI ID:
1093550
Country of Publication:
United States
Language:
English

References (10)

Advanced Liquid Membranes Based on Novel Ionic Liquids for Selective Separation of Olefin/Paraffin via Olefin-Facilitated Transport journal February 2008
Novel perfluorinated ionomers and ionenes journal June 1995
Polynuclear Metal Complexes Obtained from the Task-Specific Ionic Liquid Betainium Bistriflimide journal April 2008
Perfectly Staggered and Twisted Difluoromethylene Groups in Perfluoroalkyl Chains: Structure of M[C4F9SO2NSO2C4F9](M= Na, K) journal July 1997
Process for the separation of olefins and paraffins patent-application July 2005
Defining the challenges for C3H6/C3H8 separation using polymeric membranes journal January 2003
Lubricants of Lubricant Additives Composed of Ionic Liquid Containing Ammonium Cations patent-application March 2008
A taste of the future journal June 2003
Synthesis of ionic liquids patent September 2008
The use of ionic liquids as efficient extraction medium in the reactive separation of cycloolefins from cyclohexane journal November 2009