EP 0180529 B2 19920408 - PROCESS FOR PREPARING CHEMICAL WOOD PULPS WITH A VIEW TO BLEACHING
Title (en)
PROCESS FOR PREPARING CHEMICAL WOOD PULPS WITH A VIEW TO BLEACHING
Publication
Application
Priority
FR 8416518 A 19841025
Abstract (en)
[origin: EP0180529A1] 1. Process for preparing chemical paper pulps in order to bleach them, of the type in which the said pulp is treated with chlorine, then with at least one oxygen compound, characterized in that the pretreatment with chlorine is performed with a pulp having a consistency between 5 % and 15 %, at a temperature between 70 degrees C and 90 degrees C, with a chlorine concentration between 0.8 % and 1.5 % by weight with respect to the weight of the pulp.
IPC 1-7
IPC 8 full level
CPC (source: EP)
D21C 9/144 (2013.01)
Designated contracting state (EPC)
AT BE DE FR IT SE
DOCDB simple family (publication)
EP 0180529 A1 19860507; EP 0180529 B1 19880629; EP 0180529 B2 19920408; AT E35433 T1 19880715; AU 4910885 A 19860529; AU 576394 B2 19880825; CA 1273755 A 19900911; DE 180529 T1 19861218; DE 3563548 D1 19880804; ES 548166 A0 19860401; ES 8606557 A1 19860401; FI 82726 B 19901231; FI 82726 C 19910410; FI 854148 A0 19851023; FI 854148 L 19860426; FR 2572431 A1 19860502; FR 2572431 B1 19871204; JP S61102495 A 19860521
DOCDB simple family (application)
EP 85420187 A 19851022; AT 85420187 T 19851022; AU 4910885 A 19851025; CA 493708 A 19851024; DE 3563548 T 19851022; DE 85420187 T 19851022; ES 548166 A 19851024; FI 854148 A 19851023; FR 8416518 A 19841025; JP 23926185 A 19851025