EP 0185858 B1 19880504 - PROCESS FOR DELIGNIFYING SULPHATE PULP
Title (en)
PROCESS FOR DELIGNIFYING SULPHATE PULP
Publication
Application
Priority
DE 3446301 A 19841219
Abstract (en)
[origin: EP0185858A1] 1. A two-stage process for the delignification of sulfate pulps produced under alkaline or neutral conditions using oxygen and hydrogen peroxide, characterized in that the pulp is pretreated simultaneously with oxygen and hydrogen peroxide at a pH value of < 5 and then further delignified with oxygen in alkaline medium.
IPC 1-7
IPC 8 full level
D21C 9/10 (2006.01)
CPC (source: EP)
D21C 9/1057 (2013.01)
Designated contracting state (EPC)
AT BE DE FR IT SE
DOCDB simple family (publication)
EP 0185858 A1 19860702; EP 0185858 B1 19880504; AT E33998 T1 19880515; DE 3446301 A1 19860619; DE 3562496 D1 19880609; FI 853492 A0 19850912; FI 853492 L 19860620; JP S61146894 A 19860704; NO 853688 L 19860620
DOCDB simple family (application)
EP 85112163 A 19850925; AT 85112163 T 19850925; DE 3446301 A 19841219; DE 3562496 T 19850925; FI 853492 A 19850912; JP 28126785 A 19851216; NO 853688 A 19850920