US 2014/0194603 A1 · METHOD FOR THE PRODUCTION OF LIGNIN-CONTAINING PRECURSOR FIBRES AND ALSO CARBON FIBRES

Abstract

The invention relates to a method for the production of a precursor for the production of carbon- and activated carbon fibres according to the wet- or air-gap spinning method, in which a solution of lignin and a fibre-forming polymer in a suitable solvent is extruded through the holes of a spinning nozzle into a coagulation bath, the formed thread is stretched and subsequently treated, dried at an elevated temperature and then wound up. The lignin-containing thread is an economical starting material for the production of carbon- and activated carbon fibres.

Claims32

Dependent claims

A method for the production of a lignin-containing precursor fibre for the production of carbon fibres and/or activated carbon fibres, comprising

a) forming a solution, comprising at least one sort of lignin and also at least one fibre-forming polymer selected from the group consisting of cellulose or cellulose derivatives in at least one solvent, selected from the group consisting of tertiary amine oxides, ionic liquids, aprotic polar solvents, dimethylformamide and dimethylacetamide, and mixtures thereof, and
b) transferring the solution into a coagulation bath by extruding the solution through a spinning nozzle by a wet spinning or an air-gap spinning method, the lignin-containing precursor fibre precipitating.

Dependencies are inferred from the claim text.

Facts

Application

14/118,149Filed 16 May 2012

Priority

EP 11004131.618 May 2011

Published

10 Jul 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

D01F 9/17
From products of vegetable origin or derivatives thereof, e.g. from cellulose acetate: from lignin
B29C 48/05
Characterised by the shape of the extruded material at extrusion: filamentary, e.g. strands
B29D 99/0078
Subject matter not provided for in other groups of this subclass: producing filamentary materials
C08L 97/02
Compositions of lignin-containing materials: lignocellulosic material, e.g. wood, straw or bagasse

Method for the production of lignin-containing precursor fibres and also carbon fibres

Life of this patent

Method for the production of lignin-containing precursor fibres and also carbon fibres

Life of this patent

Abstract

Claims32