EP 0554391 B1 19970416 - PULPING PROCESS
Title (en)
PULPING PROCESS
Title (de)
AUFSCHLUSSVERFAHREN
Title (fr)
PROCEDE DE REDUCTION EN PATE
Publication
Application
Priority
- US 60260590 A 19901024
- US 9107402 W 19911007
Abstract (en)
[origin: WO9207994A1] A pulp preparation process in which pulp treatment is expanded to include in-digester treatments (Figures 7, 8, 9) previously performed outside of the digester (12) in discrete process equipment. Specifically, a manner for in-digester bleaching is disclosed, preferably using non-chlorine containing bleaching reagents.
IPC 1-7
IPC 8 full level
D21C 3/22 (2006.01); D21C 3/26 (2006.01); D21C 9/10 (2006.01)
CPC (source: EP)
D21C 3/22 (2013.01); D21C 3/26 (2013.01); D21C 9/1026 (2013.01); D21C 9/1031 (2013.01)
Designated contracting state (EPC)
AT DE ES FR GB IT SE
DOCDB simple family (publication)
WO 9207994 A1 19920514; AT E151824 T1 19970515; AU 9022291 A 19920526; CA 2094819 A1 19920425; CA 2094819 C 19990202; CN 1028250 C 19950419; CN 1061452 A 19920527; DE 69125722 D1 19970522; DE 69125722 T2 19970904; EP 0554391 A1 19930811; EP 0554391 B1 19970416; ES 2101830 T3 19970716; FI 931854 A0 19930423; FI 931854 A 19930423; MX 9101706 A 19920605; NO 302187 B1 19980202; NO 931486 D0 19930422; NO 931486 L 19930422; PL 168216 B1 19960131; RU 2068904 C1 19961110; ZA 918441 B 19920729
DOCDB simple family (application)
US 9107402 W 19911007; AT 92900022 T 19911007; AU 9022291 A 19911007; CA 2094819 A 19911007; CN 91109845 A 19911024; DE 69125722 T 19911007; EP 92900022 A 19911007; ES 92900022 T 19911007; FI 931854 A 19930423; MX 9101706 A 19911022; NO 931486 A 19930422; PL 29853791 A 19911007; RU 93005264 A 19911007; ZA 918441 A 19911023