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1. WO2000015899 - METHODS FOR DEINKING AND DECOLORIZING PRINTED PAPER

Publication Number WO/2000/015899
Publication Date 23.03.2000
International Application No. PCT/US1999/021432
International Filing Date 16.09.1999
Chapter 2 Demand Filed 04.04.2000
IPC
D21C 5/00 2006.01
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
5Other processes for obtaining cellulose, e.g. cooking cotton linters
D21C 5/02 2006.01
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
5Other processes for obtaining cellulose, e.g. cooking cotton linters
02Working-up waste paper
CPC
D21C 5/005
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
5Other processes for obtaining cellulose, e.g. cooking cotton linters
005Treatment of cellulose-containing material with microorganisms or enzymes
D21C 5/022
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
5Other processes for obtaining cellulose, e.g. cooking cotton linters
02Working-up waste paper
022Chemicals therefor
D21C 5/027
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
5Other processes for obtaining cellulose, e.g. cooking cotton linters
02Working-up waste paper
025De-inking
027Chemicals therefor
Y02W 30/64
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
30Technologies for solid waste management
50Reuse, recycling or recovery technologies
64Paper recycling
Applicants
  • NOVOZYMES NORTH AMERICA, INC. [US]/[US]
Inventors
  • FRANKS, Neal, E.
Agents
  • LAMBIRIS, Elias, J.
Priority Data
09/156,73417.09.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHODS FOR DEINKING AND DECOLORIZING PRINTED PAPER
(FR) PROCEDES DE DESENCRAGE ET DE D'ELIMINATION DES COULEURS SUR DU PAPIER IMPRIME
Abstract
(EN)
The present invention relates to methods for deinking and decolorizing a printed paper, comprising: (a) pulping the printed paper to obtain a pulp slurry; (b) dislodging an ink from the pulp slurry with one or more enzymes; (c) decolorizing the dye contained in the pulp slurry with one or more laccases in the presence of oxygen and optionally one or more chemical mediators; (d) separating the released ink from the pulp slurry; and (e) recovering the decolorized pulp. The present invention also relates to decolorized pulps prepared by such methods and to methods for producing recycled paper.
(FR)
La présente invention concerne des procédés de désencrage et d'élimination des couleurs sur un papier imprimé. Ces procédés consistent à: (a) réduire en pâte le papier imprimé pour obtenir une suspension épaisse de pâte à papier; (b) éliminer l'encre présente dans la suspension épaisse de pâte à papier à l'aide d'une ou plusieurs enzymes; (c) éliminer la couleur du colorant contenu dans la suspension épaisse de pâte à papier avec une ou plusieurs laccases en présence d'oxygène et facultativement d'un ou plusieurs médiateurs chimiques; (d) séparer de la suspension épaisse de pâte à papier l'encre libérée; et (e) récupérer la pâte à papier débarrassée de ses couleurs. La présente invention concerne également des pâtes à papier débarrassées de leurs couleurs préparées à l'aide de ces procédés ainsi que des procédés de production de papier recyclé.
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