	US 12,404,381 B2
	Method for making a carbon fibre from a paper product
Sylvain Pineau, Mont de Marsan (FR); Célia Mercader, Talence (FR); and Céline Largeau, Le Loroux Bottereau (FR)
Assigned to INSTITUT DE RECHERCHE TECHNOLOGIQUE JULES VERNE, Bouguenais (FR); CENTRE TECHNOLOGIQUE NOUVELLE-AQUITAINE COMPOSITES & MATERIAUX AVANCES, Pessac (FR); and FAURECIA SERVICES GROUPE, Nanterre (FR)
Appl. No. 17/610,053
Filed by INSTITUT DE RECHERCHE TECHNOLOGIQUE JULES VERNE, Bouguenais (FR); CENTRE TECHNOLOGIQUE NOUVELLE- AQUITAINE COMPOSITES & MATERIAUX AVANCES, Pessac (FR); and FAURECIA SERVICES GROUPE, Nanterre (FR)
PCT Filed May 7, 2020, PCT No. PCT/EP2020/062658 § 371(c)(1), (2) Date Nov. 9, 2021, PCT Pub. No. WO2020/229282, PCT Pub. Date Nov. 19, 2020.
Claims priority of application No. 1904850 (FR), filed on May 10, 2019.
Prior Publication US 2022/0259393 A1, Aug. 18, 2022
Int. Cl. C08J 5/24 (2006.01); C01B 32/05 (2017.01); C08J 5/04 (2006.01); D01F 9/16 (2006.01); D01F 13/02 (2006.01); D21H 13/50 (2006.01)

CPC C08J 5/243 (2021.05) [C01B 32/05 (2017.08); C08J 5/042 (2013.01); D01F 9/16 (2013.01); D01F 13/02 (2013.01); D21H 13/50 (2013.01); Y02P 70/62 (2015.11)]

20 Claims

1. Method for manufacturing a carbon fibre from a manufactured paper product comprising about 70-85 wt % cellulose fibres extracted from wood, comprising:

a/ preparing a cellulose-based fibre, comprising the successive steps of:

a1/ grinding said paper product to obtain a ground paper material,

a3/ directly dissolving the ground material obtained at the end of step a1/ in an aqueous phosphoric acid solution to form a so-called spinning solution,

a4/ using said spinning solution to manufacture a cellulose-based continuous fibre by implementing a solvent spinning process,

a5/ optionally drawing the resulting cellulose-based continuous fibre,

b/ and carbonising said cellulose-based continuous fibre to form a carbon fibre.