CA1337843C - Process for oxygen bleaching - Google Patents

Process for oxygen bleaching

Info

Publication number
CA1337843C
CA1337843C CA000614212A CA614212A CA1337843C CA 1337843 C CA1337843 C CA 1337843C CA 000614212 A CA000614212 A CA 000614212A CA 614212 A CA614212 A CA 614212A CA 1337843 C CA1337843 C CA 1337843C
Authority
CA
Canada
Prior art keywords
pulp
delignification
vertical reactor
mixer
delignification zone
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
CA000614212A
Other languages
English (en)
French (fr)
Inventor
Ake Backlund
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
Kamyr 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
Application filed by Kamyr AB filed Critical Kamyr AB
Application granted granted Critical
Publication of CA1337843C publication Critical patent/CA1337843C/en
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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
CA000614212A 1988-10-18 1989-09-28 Process for oxygen bleaching Expired - Lifetime CA1337843C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8803705A SE467582B (sv) 1988-10-18 1988-10-18 Saett vid oxygenblekning
SE8803705-6 1988-10-18

Publications (1)

Publication Number Publication Date
CA1337843C true CA1337843C (en) 1996-01-02

Family

ID=20373661

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000614212A Expired - Lifetime CA1337843C (en) 1988-10-18 1989-09-28 Process for oxygen bleaching

Country Status (4)

Country Link
JP (1) JPH02145883A (ja)
CA (1) CA1337843C (ja)
FI (1) FI91896C (ja)
SE (1) SE467582B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2479619C2 (ru) * 2009-11-17 2013-04-20 Феликс Фердинандович Аухадеев Пульсационное устройство для делигнификации целлюлозосодержащего растительного сырья и способ его работы

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE510740C2 (sv) * 1996-11-26 1999-06-21 Sunds Defibrator Ind Ab Styrning av syrgasdelignifiering
SE522593C2 (sv) * 1999-07-06 2004-02-24 Kvaerner Pulping Tech System och förfarande för syragasdelignifiering av massa av lignocellulosahaltigt material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2479619C2 (ru) * 2009-11-17 2013-04-20 Феликс Фердинандович Аухадеев Пульсационное устройство для делигнификации целлюлозосодержащего растительного сырья и способ его работы

Also Published As

Publication number Publication date
SE8803705L (sv) 1990-04-19
FI894949A0 (fi) 1989-10-18
FI91896C (fi) 1994-08-25
FI91896B (fi) 1994-05-13
SE467582B (sv) 1992-08-10
SE8803705D0 (sv) 1988-10-18
JPH02145883A (ja) 1990-06-05

Similar Documents

Publication Publication Date Title
US4451332A (en) Method for delignification of ligno-cellulose containing fiber material with an alkali-oxygen extraction stage
US4806203A (en) Method for alkaline delignification of lignocellulosic fibrous material at a consistency which is raised during reaction
US5217575A (en) Process for oxygen bleaching using two vertical reactors
US4198266A (en) Oxygen delignification of wood pulp
US4419184A (en) Method for control of chemicals during gas treatment of suspensions
CA1332262C (en) Bleaching with ozone-chlorine mixtures
CA1281855C (en) High consistency peroxide bleaching
JPH10331085A (ja) 低温気相連続蒸解カンおよびその使用方法
CA1184709A (en) Method and apparatus for oxygen delignification
US6080275A (en) Oxygen delignification of medium consistency pulp slurry
CA1337843C (en) Process for oxygen bleaching
JPS59144692A (ja) 木材パルプの改良漂白法
US5328564A (en) Modified digestion of paper pulp followed by ozone bleaching
JP3217065B2 (ja) パルプの連続蒸解法
FI89517B (fi) Styrning av peroxidblekning av olika traemassor
US5645687A (en) Process for manufacturing bleached pulp with reduced chloride production
WO1992012289A1 (en) Chlorine-free process for bleaching lignocellulosic pulp
US6533895B1 (en) Apparatus and method for chemically loading fibers in a fiber suspension
JP3817264B2 (ja) 繊維パルプ懸濁液処理方法及び装置
EP0211945A4 (en) METHOD AND DEVICE FOR ALKALINE DELIGNIFICATION OF LIGNOCELLULOSE FIBER MATERIAL.
WO2001075220A1 (en) A method for controlling the delignification and bleaching of a pulp suspension
RU2071518C1 (ru) Способ кислородной делигнификации небеленой целлюлозной массы
EP0047656A1 (en) Process and apparatus for the oxygen delignification of pulp
CA1186106A (en) Process and apparatus for the oxygen delignification of pulp
CA2170733A1 (en) Medium consistency ozone brightening of high consistency ozone bleached pulp

Legal Events

Date Code Title Description
MKEX Expiry
MKEX Expiry

Effective date: 20130102