PREBLEACHING OF PAPERPULP BEFORE A PEROXIDE BLEACHING STAGE - Patent 0937173

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EP 0 937 173 A1

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(43)	Date of publication:
	25.08.1999 Bulletin 1999/34

(21)	Application number: 97912600.0

(22)	Date of filing: 29.10.1997

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International Patent Classification (IPC):

D21C 9/ 10^{( . )}
D21C 9/ 16^{( . )}

D21C 9/ 14^{( . )}

(86)	International application number:
	PCT/SE1997/001810

(87)	International publication number:
	WO 1998/021400 (22.05.1998 Gazette 1998/20)

(84)	Designated Contracting States:
	AT ES FI GB SE

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Priority:

08.11.1996 SE 19960004094

(71)	Applicant: SUNDS DEFIBRATOR INDUSTRIES AKTIEBOLAG
	851 94 Sundsvall (SE)

(72)	Inventor:
	GERMGARD, Ulf S-865 31 Alnö (SE)

(74)	Representative: Rosenquist, Per Olof
	Bergenstrahle & Lindvall AB, P.O. Box 17704 118 93 Stockholm 118 93 Stockholm (SE)

(54)	PREBLEACHING OF PAPERPULP BEFORE A PEROXIDE BLEACHING STAGE