公开(公告)号：WO2022005370A1

公开(公告)日：2022-01-06

申请号：PCT/SE2021/050624

申请日：2021-06-23

Applicant: RISE INNVENTIA AB

Inventor： BENGTSSON, Andreas ,  SEDIN, Maria ,  BRÄNNVALL, Elisabet ,  LANDMÉR, Alice ,  ALVARADO, Fernando

IPC: D01D1/02 ,  C08H7/00 ,  D01D5/06 ,  D01F9/17 ,  C08B1/00 ,  D01F1/02 ,  C08H6/00 ,  D01F8/02

Abstract: The present disclosure relates to a method for the production of precursor fiber for the production of carbon fiber, comprising the steps: a) a) forming a spinning dope comprising a dissolving pulp, a lignin and an alkali metal hydroxide dissolved in water (s201);5 b) extruding the spinning dope through a spinning nozzle to provide a fibrous extrudate (s203); and c) passing the fibrous extrudate through a coagulation liquid to provide the precursor fiber (s205); wherein the coagulation liquid is arranged to effect precipitation of the precursor fiber by regulation of pH and/or ionicity. The disclosure further relates to precursor fibers and carbon fibers produced by the method above, as well as spinning dopes used in the method.