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1. WO2021006798 - METHOD FOR DISSOLVING PULP FROM RECYCLED TEXTILE MATERIAL

Publication Number WO/2021/006798
Publication Date 14.01.2021
International Application No. PCT/SE2020/050699
International Filing Date 02.07.2020
IPC
C08J 11/04 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
11Recovery or working-up of waste materials
04of polymers
D21C 3/02 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
3Pulping cellulose-containing materials
02with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
D21C 3/06 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
3Pulping cellulose-containing materials
04with acids, acid salts, or acid anhydrides
06sulfur dioxide; sulfurous acid; bisulfites
C08B 16/00 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
BPOLYSACCHARIDES; DERIVATIVES THEREOF
16Regeneration of cellulose
D21C 1/04 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
1Pretreatment of the finely-divided materials before digesting
04with acid reacting compounds
D21C 9/02 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
9After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
02Washing
CPC
C08B 16/00
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
BPOLYSACCHARIDES; DERIVATIVES THEREOF
16Regeneration of cellulose
C08L 1/24
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
1Compositions of cellulose, modified cellulose or cellulose derivatives
08Cellulose derivatives
22Cellulose xanthate
24Viscose
D21C 1/04
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
1Pretreatment of the finely-divided materials before digesting
04with acid reacting compounds
D21C 3/02
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
3Pulping cellulose-containing materials
02with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
D21C 5/00
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 9/10
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
9After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
10Bleaching ; ; Apparatus therefor
Applicants
  • KIRAM AB [SE]/[SE]
Inventors
  • STIGSSON, Lars
Agents
  • PATIO AB
Priority Data
1930238-905.07.2019SE
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD FOR DISSOLVING PULP FROM RECYCLED TEXTILE MATERIAL
(FR) PROCÉDÉ POUR PÂTE À DISSOUDRE À PARTIR D'UN MATÉRIAU TEXTILE RECYCLÉ
Abstract
(EN)
A method for the manufacturing of cellulose dissolving pulp from virgin wood cellulose and crude recycled textile cellulosic material by charging recycled textile material to a brownstock washing step, an oxidative alkaline pulp bleaching step, and/or an acidic pulp treatment step of a kraft or sulfite pulp mill fiberline. Spent chemicals, effluents and/or organic residues from co-processing cellulosic pulps, textile pulp pre-treatment steps, pulp washing steps, pulp bleaching or pulp acidic treatment steps are recycled to the pulp mill chemicals recovery cycle and /or to the secondary effluent treatment plant.
(FR)
L'invention concerne un procédé de fabrication de pâte à dissoudre de cellulose à partir de cellulose de bois vierge et de matériau cellulosique textile recyclé brut par chargement d'un matériau textile recyclé vers une étape de lavage de pâte brune, une étape de blanchiment de pâte alcaline oxydante, et/ou une étape de traitement de pâte acide d'une ligne d'usine de pâte à papier kraft ou de pâte au bisulfite. Les produits chimiques usés, les effluents et/ou les résidus organiques issus du co-traitement de pâtes cellulosiques, des étapes de prétraitement de pâte textile, des étapes de lavage de pâte, des étapes de blanchiment de pâte ou de traitement acide de pâte sont recyclés dans le cycle de récupération de produits chimiques d'usine de pâte et/ou dans l'installation de traitement d'effluent secondaire.
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