EP 3472383 A1 20190424 - METHOD FOR PRODUCING A FIBROUS MATERIAL
Title (en)
METHOD FOR PRODUCING A FIBROUS MATERIAL
Title (de)
VERFAHREN ZUR HERSTELLUNG VON FASERSTOFF
Title (fr)
PROCÉDÉ DE PRODUCTION D'UNE MATIÈRE FIBREUSE
Publication
Application
Priority
- AT 505512016 A 20160617
- EP 2017061926 W 20170518
Abstract (en)
[origin: WO2017215877A1] The invention relates to a method for producing a fibrous material from lignocellulose from wood, preferably in the form of wood chips. The lignocellulose material is impregnated with a mixture of sodium sulfite and sodium bisulfite and subsequently undergoes a comminution process in a refiner. The invention is characterized primarily in that additionally chemicals from a mixture of sodium sulfite and sodium bisulfite are directly introduced into the refiner. Thus, optimal conditions can be set for both additive flows of chemicals such that the process can be operated in an energetically advantageous manner and corrosion and scale formation in the refiner and subsequent aggregates can be prevented as much as possible.
IPC 8 full level
D21B 1/02 (2006.01); D21B 1/16 (2006.01); D21C 1/04 (2006.01); D21C 3/04 (2006.01); D21C 3/12 (2006.01); D21C 9/00 (2006.01)
CPC (source: AT EP US)
D21B 1/021 (2013.01 - EP US); D21B 1/14 (2013.01 - US); D21C 1/04 (2013.01 - EP); D21C 3/04 (2013.01 - EP); D21C 3/12 (2013.01 - AT EP US); D21C 3/266 (2013.01 - AT); D21C 9/007 (2013.01 - EP); D21D 1/20 (2013.01 - EP US)
Citation (search report)
See references of WO 2017215877A1
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2017215877 A1 20171221; AT 518800 A1 20180115; AT 518800 B1 20190915; CA 3028009 A1 20171221; CA 3028009 C 20221213; EP 3472383 A1 20190424; EP 3472383 B1 20200304; RU 2704362 C1 20191028; US 11535983 B2 20221227; US 2019352849 A1 20191121
DOCDB simple family (application)
EP 2017061926 W 20170518; AT 505512016 A 20160617; CA 3028009 A 20170518; EP 17724804 A 20170518; RU 2018147212 A 20170518; US 201716307823 A 20170518