Title (en)

A PROCESS FOR BLEACHING A LIGNOCELLULOSIC PULP

Title (de)

VERFAHREN ZUM BLEICHEN VON LIGNOCELLULOSEHALTIGEN PULPE

Title (fr)

PROC D DE BLANCHIMENT D'UNE P TE LIGNOCELLULOSIQUE

Publication

EP 1272706 A1 20030108 (EN)

Application

EP 01931579 A 20010404

Priority

• EP 0104067 W 20010404
• FI 20000806 A 20000405

Abstract (en)

[origin: WO0175221A1] The invention relates to improvements in the bleaching of a lignocellulosic pulp by adding carbon dioxide to provide a beneficial pH profile in the chlorine dioxide bleaching or delignification. The resulting bleached pulp is used in the production of paper or pulp. The invention also relates to the use of carbon dioxide for providing a desired pH profile in a chlorine dioxide bleaching stage.

IPC 1-7

D21C 9/14

IPC 8 full level

D21C 9/10 (2006.01); D21C 9/14 (2006.01)

CPC (source: EP US)

D21C 9/1036 (2013.01 - EP US); D21C 9/14 (2013.01 - EP US)

Citation (search report)

See references of WO 0175221A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

DOCDB simple family (publication)

WO 0175221 A1 20011011; AU 5831901 A 20011015; CA 2404691 A1 20011011; EP 1272706 A1 20030108; FI 20000806 A0 20000405; FI 20000806 A 20011006; US 2003155086 A1 20030821

DOCDB simple family (application)

EP 0104067 W 20010404; AU 5831901 A 20010404; CA 2404691 A 20010404; EP 01931579 A 20010404; FI 20000806 A 20000405; US 24069703 A 20030303