Ionic liquids for separation of olefin-paraffin mixtures

摘要

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;
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—SO2—(CF2)nCF3 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.

主权项

1. An ionic liquid comprising (i) a cationic portion containing a complex of a silver (I) ion and one or more neutral ligands selected from the group consisting of organoamines and olefins, and (ii) an anionic portion having the chemical formula: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—SO2—(CF2)nCF3 subtended by p is replaced with an oxide atom connected to the sulfur atom, and when p is 1, the shown perfluoroalkyl groups can optionally crosslink to form a cyclic anion;
further provided that said organoamines exclude saturated primary amines containing up to four carbon atoms, and said olefins exclude olefins containing up to six carbon atoms, and when the neutral ligand is a saturated primary amine or an olefin, then m and n are not both 0.