Ionic liquids for solubilizing polymers
AssigneeBASF SE
InventorsGiovanni D'Andola, Laszlo Szarvas, Klemens Massonne, Veit Stegmann
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Abstract
The present invention relates to a liquid composition which comprises at least one polymer and at least one ionic liquid, the cations of which are derived from polycyclic amidine bases, and a process for isolating cellulose from cellulose-containing sources using at least one such ionic liquid.
Claims15
A process for obtaining at least one constituent of a lignocellulose material, wherein the constituent is solubilized selectively, or liberated selectively or solubilized and liberated selectively from a solubilized product of the lignocellulose material, and wherein at least one ionic liquid is employed for the solubilization and/or liberation, wherein the at least one ionic liquid is at least one ionic liquid represented by formula I
- wherein
- A together with the C—N group to which it is bonded, forms a 4- to 8-membered, saturated or unsaturated or aromatic ring, which is optionally substituted, which can optionally have further heteroatoms or heteroatom-containing groups, and which can have further fused-on saturated, unsaturated or aromatic carbocyclic rings or heterocyclic rings,
- B together with the amidino group to which it is bonded, forms a 4- to 8-membered, mono- or polyunsaturated, non-aromatic ring, which is optionally substituted and can have further fused-on saturated, unsaturated or aromatic carbocyclic rings or heterocyclic rings,
- R represents hydrogen or an organyl radical,
- Yn− represents a mono-, di-, tri- or tetravalent anion, and
- n represents one, two, three or four
- and at least one polymer solubilized therein.
Dependencies are inferred from the claim text.