EP 0285530 B1 19930113 - PROCESS FOR BLEACHING PULPS
Title (en)
PROCESS FOR BLEACHING PULPS
Publication
Application
Priority
FR 8704844 A 19870402
Abstract (en)
[origin: EP0285530A1] Bleaching of pulps of mechanical origin in which the pulp is treated with a metal-complexing or sequestering agent and is then washed with an efficiency higher than 95 % before being subjected to the action of hydrogen peroxide at a temperature above 100 DEG C and not exceeding 250 DEG C at the pressure of steam at the said temperature for 1 to 30 minutes, not conjointly with a mechanical beating action.
IPC 1-7
IPC 8 full level
CPC (source: EP)
D21C 9/1005 (2013.01)
Designated contracting state (EPC)
AT BE DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0285530 A1 19881005; EP 0285530 B1 19930113; AT E84581 T1 19930115; AU 1406788 A 19881006; AU 606930 B2 19910221; CA 1310797 C 19921201; DE 285530 T1 19890330; DE 3877403 D1 19930225; DE 3877403 T2 19930519; ES 2004846 A4 19890216; ES 2004846 T3 19930616; FI 881544 A0 19880331; FI 881544 A 19881003; FI 93749 B 19950215; FI 93749 C 19950526; FR 2613388 A1 19881007; FR 2613388 B1 19900504; JP H0156197 B2 19891129; JP S63256786 A 19881024; NO 173886 B 19931108; NO 173886 C 19940216; NO 881404 D0 19880329; NO 881404 L 19881003; NZ 224144 A 19890727
DOCDB simple family (application)
EP 88420102 A 19880329; AT 88420102 T 19880329; AU 1406788 A 19880331; CA 563118 A 19880331; DE 3877403 T 19880329; DE 88420102 T 19880329; ES 88420102 T 19880329; FI 881544 A 19880331; FR 8704844 A 19870402; JP 8211688 A 19880402; NO 881404 A 19880329; NZ 22414488 A 19880406