公开(公告)号：WO2019151937A1

公开(公告)日：2019-08-08

申请号：PCT/SE2019/050091

申请日：2019-02-04

Applicant: RISE INNVENTIA AB

Inventor： BERTHOLD, Fredrik ,  SJÖHOLM, Elisabeth ,  ALVARADO, Fernando ,  PETTERSSON, Henrik

IPC: D01F9/17 ,  C08H7/00 ,  D01D5/06 ,  D01F9/04

Abstract: The present disclosure relates to a method for the production of precursor fiber for the production of carbon fiber, comprising the steps: a) providing a spinning dope comprising a lignin and a gelling hydrocolloid dispersed in aqueous alkaline solution (s201); b) extruding the spinning dope through a spinning nozzle to provide an initial fiber (s203); and c) passing the initial fiber through a first coagulation liquid to provide the precursor fiber (s205); wherein the first coagulation liquid is arranged to effect gelling of the gelling hydrocolloid by regulation of pH and/or ionicity. The disclosure further relates to precursor fibers and carbon fibers produced by the method above.

公开(公告)号：WO2020112003A1

公开(公告)日：2020-06-04

申请号：PCT/SE2019/051164

申请日：2019-11-15

Applicant: RISE INNVENTIA AB ,  RISE RESEARCH INSTITUTES OF SWEDEN AB

Inventor： KROCHAK, Paul ,  JOHANSSON, Klas ,  BERTHOLD, Jesper ,  BERTHOLD, Fredrik ,  DE SAN PIO, Ignacio ,  ANKERFORS, Caroline ,  SJÖSTEDT, Anna ,  MUELLER, Bettina ,  DEDIC, DIna ,  JOHANSSON SALAZAR-SANDOVAL, Eric ,  TÖNNERFORS, Erika ,  POUYET, Frédéric ,  PRESTJAN, Katarina ,  SLETTENGREN, Kerstin ,  KALLONEN, Laura ,  KUBAT, Mikaela ,  LOPES, Marta

IPC: D21C3/00 ,  C08H8/00 ,  C08L1/02 ,  D21C3/24 ,  D21C3/26 ,  D21C9/00 ,  D21H11/18

Abstract: The present invention relates to a method of producing holocellulose fibres by treating a wood-based raw material with an organic peroxide, wherein the method comprises charging the organic peroxide continuously to the wood-based raw material during the treatment and/or charging the organic peroxide to the wood-based raw material in at least two separate steps with an intermediate alkaline treatment step. Additionally, a process for the production of paper comprising the steps of preparing a papermaking stock comprising an aqueous pulp slurry comprising cellulosic fibres and having a fibre consistency of from 0.1 to 40 % by weight, wherein the cellulosic fibres comprise or consist of holocellulose fibres, and wherein the amount of the wood-based holocellulose fibres is from 0.5 to 100% by weight, based on the total weight of the stock; providing the stock to a wire and form a web; dewatering the web; and drying the web is claimed. By the method affordable way to produce holocellulose fibres usable in the process to provide paper with high strength is provided, while effective dewatering can be obtained during the manufacturing process.