Patent ID: 7749318

Claim:
A solution comprising cellulose and an ionic liquid comprising one or more anions and one or more cations as solvent, wherein the one or more cations comprise at least one atom selected from the group consisting of nitrogen, oxygen, sulfur and phosphorus which is present in protonated form, and wherein the ionic liquid comprises at least one cation selected from the group consisting of formulae (IVe) to (IVt): and oligomers comprising one or more of formulae (IVe) to (IVt), wherein R is hydrogen; and R 1 to R 9 are each, independently of one another, hydrogen, a sulfo group or a carbon-comprising organic, saturated or unsaturated, acyclic or cyclic, aliphatic, aromatic or araliphatic radical which has from 1 to 20 carbon atoms and is unsubstituted or interrupted by from 1 to 5 heteroatoms or functional groups or substituted, with the radicals R 1 to R 9 which are bound to a carbon atom (and not to a heteroatom) in the formulae (IV) also being able to be halogen or a functional group; or two adjacent radicals from the group consisting of R 1 to R 9 can together also be a divalent, carbon-comprising organic, saturated or unsaturated, acyclic or cyclic, aliphatic, aromatic or araliphatic radical which has from 1 to 30 carbon atoms and is unsubstituted or interrupted by from 1 to 5 heteroatoms or functional groups or substituted.