US 12,247,353 B2
Fibre dissolution with enzymatic treatment
Kaisa Marjamaa, Espoo (FI); Nina Aro, Espoo (FI); Kristiina Kruus, Espoo (FI); and Jenni Rahikainen, Espoo (FI)
Assigned to Teknologian tutkimuskeskus VTT Oy, Espoo (FI)
Appl. No. 17/254,317
Filed by Teknologian tutkimuskeskus VTT Oy, Espoo (FI)
PCT Filed Jun. 20, 2019, PCT No. PCT/FI2019/050486
§ 371(c)(1), (2) Date Dec. 21, 2020,
PCT Pub. No. WO2019/243673, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 20185565 (FI), filed on Jun. 21, 2018.
Prior Publication US 2021/0172119 A1, Jun. 10, 2021
Int. Cl. D21C 5/00 (2006.01)
CPC D21C 5/005 (2013.01) 13 Claims
OG exemplary drawing
 
1. A process for the dissolution of cellulose fibres comprising:
subjecting a cellulose raw material to an enzymatic treatment step using a lytic polysaccharide monooxygenase (LPMO) as an oxidative enzyme; and
dissolving the thus obtained enzyme-treated cellulose in a non-derivatising solvent, wherein the LPMO is used at a concentration of 0.25-7 mg/g of the cellulose raw material in the enzymatic treatment step, and
wherein the enzymatic treatment step is carried out in the presence of an electron donor,
wherein the electron donor is gallic acid, and wherein the gallic acid is provided at a concentration of 1-5 mM in the enzymatic treatment step.