EP 0273759 A2 19880706 - Procedure for recirculating phenol in a lignocellulosic materials digestion process.
Title (en)
Procedure for recirculating phenol in a lignocellulosic materials digestion process.
Title (de)
Verfahren zum Wiederumlauf von Phenol in einem Verfahren zum Aufschluss von Lignozellulosematerialien.
Title (fr)
Procédé de recirculation du phénol dans un procédé de digestion des matières lignocellulosiques.
Publication
Application
Priority
FI 865360 A 19861231
Abstract (en)
A process for recirculating phenol in a lignocellulosic materials digestion process in which lignocellulosic material is digested with phenol-containing solutions in order to dissolve lignin, characterised in that phenol recirculation is carried out as a cyclic process in which the phenol-containing solution is first used in the washing of the cellulosic material from the phenol digeston, thereafter in the lignocellulosic material digestion step, and finally in a lignocellulosic material impregnation step preceding the phenol digestion process.
IPC 1-7
IPC 8 full level
D21C 3/20 (2006.01); D21C 1/04 (2006.01); D21C 3/04 (2006.01); D21C 9/02 (2006.01); D21C 11/00 (2006.01)
CPC (source: EP)
D21C 9/02 (2013.01)
Designated contracting state (EPC)
AT DE FR IT SE
DOCDB simple family (publication)
EP 0273759 A2 19880706; EP 0273759 A3 19890816; EP 0273759 B1 19910904; AT E66974 T1 19910915; BR 8707183 A 19880809; CA 1281714 C 19910319; DE 3772741 D1 19911010; FI 77062 B 19880930; FI 77062 C 19890110; FI 865360 A0 19861231; FI 865360 A 19880701; JP S63175188 A 19880719; NO 163747 B 19900402; NO 163747 C 19900711; NO 875428 D0 19871223; NO 875428 L 19880701; ZA 879483 B 19880514
DOCDB simple family (application)
EP 87311493 A 19871229; AT 87311493 T 19871229; BR 8707183 A 19871230; CA 555716 A 19871231; DE 3772741 T 19871229; FI 865360 A 19861231; JP 33680287 A 19871229; NO 875428 A 19871223; ZA 879483 A 19871217