Method of forming regenerated carbohydrates with solvent systems based on molten ionic liquids

US8163215B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Veit Stegmann · Mannheim, DE
• Klemens Massonne · Bad Dürkheim, DE
• Matthias Maase · Speyer, DE
• Eric Uerdingen · Speyer, DE
• Michael Lutz · Speyer, DE
• Frank Hermanutz · Leonberg, DE
• Frank Gaehr · Eßlingen, DE

Key dates

• Filing date: Dec 22, 2006
• Grant date: Apr 24, 2012
• Expiry date: Dec 22, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2965
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A solution system for biopolymers in the form of carbohydrates based on a molten ionic liquid, additives optionally being contained in the solution system, is described. This solution system contains a protic solvent or a mixture of several protic solvents, and in the case where the protic solvent is solely water, this is present in the solution system in an amount of more than about 5 wt. %. Carbohydrates can be incorporated into the solution system, in particular in the form of starch, cellulose and derivatives thereof, and it can then be used for regeneration of the carbohydrates contained therein. A particularly advantageous process for the preparation of the solution system containing the carbohydrates and for the preparation of regenerated carbohydrates, in particular in the form of regenerated cellulose fibers, is moreover described. The invention accordingly also provides such spun fibers as are distinguished in that they are non-fibrillating. The invention offers in particular economic advantages over the systems of the prior art.