EP 3966386 B1 20231101 - CELLULOSE MATERIAL PLASTICIZATION AND VISCOSITY CONTROLLED CELLULOSIC MATERIAL
Title (en)
CELLULOSE MATERIAL PLASTICIZATION AND VISCOSITY CONTROLLED CELLULOSIC MATERIAL
Title (de)
PLASTIFIZIERUNG VON CELLULOSEMATERIALIEN UND VISKOSITÄTSKONTROLLIERTES CELLULOSEMATERIAL
Title (fr)
PLASTIFICATION DE MATIÈRE CELLULOSIQUE ET MATIÈRE CELLULOSIQUE À VISCOSITÉ CONTRÔLÉE
Publication
Application
Priority
FI 2019050371 W 20190510
Abstract (en)
[origin: WO2020229722A1] The invention relates to method for producing viscosity controlled cellulosic material having a viscosity value in a range between 150 ml/g and 500 ml/g in a continuous process, the method comprising the following steps: i) forming a cellulose-water mixture (15) comprising water and chemically treated wood-based cellulosic material, the cellulose-water mixture (15) having a dry matter content between 3% and 20%, ii) treating the formed cellulose-water mixture (15) in a plasticization step (100) at a temperature between 130°C and 200°C, and a pressure between 3 bars and 15 bars, at least 5 minutes and 120 minutes at the most, while mixing the cellulose-water mixture (15), and feeding hot water and/or water steam to the cellulose-water mixture, thereby obtaining a treated mixture (18), and iii) depressurizing the treated mixture (18) in a depressurizing step (105) in a controlled manner, thereby obtaining the viscosity controlled cellulosic material (20). This invention further relates to a viscosity controlled cellulosic material and a system for producing viscosity controlled cellulosic material.
IPC 8 full level
CPC (source: EP US)
D21C 1/02 (2013.01 - EP US); D21C 9/002 (2013.01 - EP US); D21C 9/007 (2013.01 - EP US); D21C 9/101 (2013.01 - US); D21C 9/1084 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2020229722 A1 20201119; BR 112021021817 A2 20220104; CA 3139848 A1 20201119; CN 113811649 A 20211217; EP 3966386 A1 20220316; EP 3966386 B1 20231101; FI 3966386 T3 20240126; US 2022298725 A1 20220922; UY 38689 A 20201231
DOCDB simple family (application)
FI 2019050371 W 20190510; BR 112021021817 A 20190510; CA 3139848 A 20190510; CN 201980096292 A 20190510; EP 19726460 A 20190510; FI 19726460 T 20190510; US 201917607961 A 20190510; UY 38689 A 20200508