EP 0704002 A1 19960403 - A PULP PRODUCTION PROCESS
Title (en)
A PULP PRODUCTION PROCESS
Title (de)
ZELLSTOFFHERSTELLUNGSVERFAHREN
Title (fr)
PROCEDE DE PRODUCTION DE PATE DE CELLULOSE
Publication
Application
Priority
- SE 9400499 W 19940526
- SE 9301834 A 19930528
Abstract (en)
[origin: WO9428236A1] A process for the production of a waste-based cellulosic pulp useful for the manufacture of paper and paperboard whether used in admixture with virgin pulp or as the sole pulp component, comprising the steps: a) digesting a waste cellulosic material in an aqueous cooking liquor having a pH lower than about neutral and containing free and/or bound SO2 and a base; b) carrying out digestion with the exclusion of atmospheric oxygen at an elevated temperature, such as within the range about 120 to 160 DEG C and at a correspondingly increased pressure; and c) recovering the resulting cellulosic pulp.
IPC 1-7
IPC 8 full level
CPC (source: EP)
D21C 3/06 (2013.01); D21C 5/02 (2013.01); Y02W 30/64 (2015.05)
Citation (search report)
See references of WO 9428236A1
Designated contracting state (EPC)
AT CH DE FR IT LI PT SE
DOCDB simple family (publication)
WO 9428236 A1 19941208; AU 6940094 A 19941220; CZ 313395 A3 19960515; EP 0704002 A1 19960403; NO 954820 D0 19951127; NO 954820 L 19960124; SE 501309 C2 19950109; SE 9301834 D0 19930528; SE 9301834 L 19941129
DOCDB simple family (application)
SE 9400499 W 19940526; AU 6940094 A 19940526; CZ 313395 A 19940526; EP 94917858 A 19940526; NO 954820 A 19951127; SE 9301834 A 19930528