ES2153593T3 - Tratamiento de una pasta papelera con un agente quelatante en al menos dos etapas de mezclamiento sin lavado intermedio. - Google Patents

Tratamiento de una pasta papelera con un agente quelatante en al menos dos etapas de mezclamiento sin lavado intermedio.

Info

Publication number
ES2153593T3
ES2153593T3 ES96928765T ES96928765T ES2153593T3 ES 2153593 T3 ES2153593 T3 ES 2153593T3 ES 96928765 T ES96928765 T ES 96928765T ES 96928765 T ES96928765 T ES 96928765T ES 2153593 T3 ES2153593 T3 ES 2153593T3
Authority
ES
Spain
Prior art keywords
chelating agent
mixing
stages
treatment
intermediate washing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES96928765T
Other languages
English (en)
Inventor
Ulf Germgard
Jonas Lindquist
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valmet AB
Original Assignee
Valmet Fibertech AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20399294&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2153593(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Valmet Fibertech AB filed Critical Valmet Fibertech AB
Application granted granted Critical
Publication of ES2153593T3 publication Critical patent/ES2153593T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-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
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Cosmetics (AREA)
  • Detergent Compositions (AREA)

Abstract

METODO DE BLANQUEO DE LA PULPA SIN USAR CLORO, DONDE LOS METALES SE ELIMINAN MEDIANTE UN AGENTE QUELANTE. ESTE AGENTE SE MEZCLA CON LA PULPA EN UN MINIMO DE DOS FASES POSTERIORES SIN UN LAVADO INTERMEDIO. LOS TIEMPOS DE ESPERA ENTRE LAS FASES DE MEZCLADO DEBEN SER INFERIORES A 15 MINUTOS, Y LA PULPA SE LAVA DESPUES DE LA ULTIMA FASE DE MEZCLADO.
ES96928765T 1995-08-24 1996-08-09 Tratamiento de una pasta papelera con un agente quelatante en al menos dos etapas de mezclamiento sin lavado intermedio. Expired - Lifetime ES2153593T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9502962A SE504803C2 (sv) 1995-08-24 1995-08-24 Behandling av massa med komplexbildare i minst två blandningssteg utan mellanliggande tvätt

Publications (1)

Publication Number Publication Date
ES2153593T3 true ES2153593T3 (es) 2001-03-01

Family

ID=20399294

Family Applications (1)

Application Number Title Priority Date Filing Date
ES96928765T Expired - Lifetime ES2153593T3 (es) 1995-08-24 1996-08-09 Tratamiento de una pasta papelera con un agente quelatante en al menos dos etapas de mezclamiento sin lavado intermedio.

Country Status (11)

Country Link
EP (1) EP0846199B1 (es)
AT (1) ATE198916T1 (es)
AU (1) AU6839996A (es)
BR (1) BR9610199A (es)
CA (1) CA2229212A1 (es)
DE (1) DE69611680T2 (es)
ES (1) ES2153593T3 (es)
NO (1) NO980753L (es)
PT (1) PT846199E (es)
SE (1) SE504803C2 (es)
WO (1) WO1997008380A1 (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE508239C2 (sv) * 1997-01-03 1998-09-21 Sunds Defibrator Ind Ab Behandling av massa med komplexbildare i minst ett blandningssteg, utan användning av blektorn
ES2456271T3 (es) 2008-06-20 2014-04-21 International Paper Company Composición y hoja de registro con propiedades ópticas mejoradas

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69004492T3 (de) * 1989-06-06 2001-11-15 Eka Nobel Ab, Bohus Verfahren zum Bleichen von Lignocellulose enthaltenden Zellstoffen.
SE469387B (sv) * 1992-05-11 1993-06-28 Kamyr Ab Saett vid blekning av massa utan anvaendning av klorkemikalier
SE502665C2 (sv) * 1993-06-11 1995-12-04 Kvaerner Pulping Tech Sätt och reaktor för ozonblekning
SE501836C2 (sv) * 1993-09-21 1995-05-22 Sunds Defibrator Ind Ab Blekning av kemisk massa varvid massan behandlas med komplexbildare före och efter ett ozonsteg

Also Published As

Publication number Publication date
SE9502962D0 (sv) 1995-08-24
NO980753L (no) 1998-02-24
BR9610199A (pt) 1998-08-04
CA2229212A1 (en) 1997-03-06
PT846199E (pt) 2001-06-29
DE69611680D1 (de) 2001-03-01
ATE198916T1 (de) 2001-02-15
NO980753D0 (no) 1998-02-23
SE504803C2 (sv) 1997-04-28
SE9502962L (sv) 1997-02-25
AU6839996A (en) 1997-03-19
DE69611680T2 (de) 2001-05-10
EP0846199A1 (en) 1998-06-10
EP0846199B1 (en) 2001-01-24
WO1997008380A1 (en) 1997-03-06

Similar Documents

Publication Publication Date Title
CA2017807A1 (en) Process for bleaching lignocellulose-containing pulps
ES2171926T3 (es) Procedimiento de blanqueo de pasta papelera.
AU7917582A (en) Washing cellulose pulps
SE9700992L (sv) Förfarande för blekning av kraftmassa
ES2153593T3 (es) Tratamiento de una pasta papelera con un agente quelatante en al menos dos etapas de mezclamiento sin lavado intermedio.
PT96951A (pt) Processo para a preparacao de pastas de rendimento elevado branqueadas
SE0301773D0 (sv) Alkaline extraction stages comprising xylanase
ES2185715T3 (es) Blanqueo de pasta papelera.
ES2195123T3 (es) Tratamiento de pasta papelera con un agente quelante sin utilizar torre de blanqueo.
SE9501623L (sv) Blekning av massa
SE501253E8 (sv) Klorfri blekning av kemisk pappersmassa
SE9604094L (sv) Förblekningsbehandling av pappersmassa med klordioxid, alkali och komplexbildare utan mellanliggande tvättar
PT97537A (pt) Processo de branqueamento de pasta quimica em pelo menos quatro passos
RU96124423A (ru) Способ отбелки целлюлозы
SE9500926L (sv) Förfarande för blekning av massa
SE9302527D0 (sv) Saett vid flerstegsblekning
BR9407975A (pt) Processo de separaçao de ions de metal de pasta de material contendo lignocelulose
SE9400738L (sv) Förfarande vid ozonblekning av sulfitmassa
SE9503764L (sv) Sätt vid massablekning

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 846199

Country of ref document: ES