Title:
REGENERATION OF WASTE PAPER
Document Type and Number:
Japanese Patent JPS5598990
Kind Code:
A
Abstract:
In the processing of waste paper containing a high proportion of dyed and/or wood-containing papers, the usual steps of disintegration, dye particle separation and flotation are followed by a multi-stage bleaching process. The first stage uses a hypochlorite bleach, whilst the second employs sodium hyposulphite or hydrogen peroxide. Preferably, the second stage employs sodium hyposulphite and a third stage hydrogen peroxide.
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Inventors:
ROTAARU PUFUARUTSUAA
JIIKUBERUTO FUITSUSHIYAA
JIIKUBERUTO FUITSUSHIYAA
Application Number:
JP520880A
Publication Date:
July 28, 1980
Filing Date:
January 18, 1980
Export Citation:
Assignee:
VOITH GMBH J M
International Classes:
D21C5/02; D21C9/10; (IPC1-7): D21C5/02; D21C9/10
Domestic Patent References:
| JPS506802A | 1975-01-24 | |||
| JPS52148203A | 1977-12-09 | |||
| JPS54138605A | 1979-10-27 |
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