CA1154205A - Brightness improvement of ozone bleached pulps - Google Patents

Brightness improvement of ozone bleached pulps

Info

Publication number
CA1154205A
CA1154205A CA000372737A CA372737A CA1154205A CA 1154205 A CA1154205 A CA 1154205A CA 000372737 A CA000372737 A CA 000372737A CA 372737 A CA372737 A CA 372737A CA 1154205 A CA1154205 A CA 1154205A
Authority
CA
Canada
Prior art keywords
pulp
ozone
bleaching
hydrosulfite
oxygen
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
Application number
CA000372737A
Other languages
English (en)
French (fr)
Inventor
Madhu P. Godsay
Shyam S. Bhattacharjee
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.)
International Paper Co
Original Assignee
International Paper Co
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 International Paper Co filed Critical International Paper Co
Application granted granted Critical
Publication of CA1154205A publication Critical patent/CA1154205A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00After-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
    • D21C9/10Bleaching ; Apparatus therefor
    • D21C9/1026Other features in bleaching processes
    • D21C9/1036Use of compounds accelerating or improving the efficiency of the processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Dental Preparations (AREA)
CA000372737A 1980-04-15 1981-03-11 Brightness improvement of ozone bleached pulps Expired CA1154205A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14052080A 1980-04-15 1980-04-15
US140,520 1980-04-15

Publications (1)

Publication Number Publication Date
CA1154205A true CA1154205A (en) 1983-09-27

Family

ID=22491621

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000372737A Expired CA1154205A (en) 1980-04-15 1981-03-11 Brightness improvement of ozone bleached pulps

Country Status (4)

Country Link
AU (1) AU6957881A (no)
CA (1) CA1154205A (no)
NO (1) NO811305L (no)
SE (1) SE8101772L (no)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5085734A (en) * 1989-02-15 1992-02-04 Union Camp Patent Holding, Inc. Methods of high consistency oxygen delignification using a low consistency alkali pretreatment
US5164043A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5164044A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5173153A (en) * 1991-01-03 1992-12-22 Union Camp Patent Holding, Inc. Process for enhanced oxygen delignification using high consistency and a split alkali addition
US5174861A (en) * 1990-10-26 1992-12-29 Union Camp Patent Holdings, Inc. Method of bleaching high consistency pulp with ozone
US5181989A (en) * 1990-10-26 1993-01-26 Union Camp Patent Holdings, Inc. Reactor for bleaching high consistency pulp with ozone
US5188708A (en) * 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
US5211811A (en) * 1989-02-15 1993-05-18 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignification
US5217574A (en) * 1989-02-15 1993-06-08 Union Camp Patent Holdings Inc. Process for oxygen delignifying high consistency pulp by removing and recycling pressate from alkaline pulp
US5409570A (en) * 1989-02-15 1995-04-25 Union Camp Patent Holding, Inc. Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone
US5441603A (en) * 1990-05-17 1995-08-15 Union Camp Patent Holding, Inc. Method for chelation of pulp prior to ozone delignification
US5451296A (en) * 1991-05-24 1995-09-19 Union Camp Patent Holding, Inc. Two stage pulp bleaching reactor
US5472572A (en) * 1990-10-26 1995-12-05 Union Camp Patent Holding, Inc. Reactor for bleaching high consistency pulp with ozone
US5520783A (en) * 1990-10-26 1996-05-28 Union Camp Patent Holding, Inc. Apparatus for bleaching high consistency pulp with ozone
US5525195A (en) * 1989-02-15 1996-06-11 Union Camp Patent Holding, Inc. Process for high consistency delignification using a low consistency alkali pretreatment
US5554259A (en) * 1993-10-01 1996-09-10 Union Camp Patent Holdings, Inc. Reduction of salt scale precipitation by control of process stream Ph and salt concentration
US5672247A (en) * 1995-03-03 1997-09-30 Union Camp Patent Holding, Inc. Control scheme for rapid pulp delignification and bleaching
USH1690H (en) * 1995-07-20 1997-11-04 Nye; Jeffrey Process for bleaching kraft pulp
US5736004A (en) * 1995-03-03 1998-04-07 Union Camp Patent Holding, Inc. Control scheme for rapid pulp delignification and bleaching
US6007678A (en) * 1992-11-27 1999-12-28 Eka Nobel Ab Process for delignification of lignocellulose-containing pulp with an organic peracid or salts thereof

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5525195A (en) * 1989-02-15 1996-06-11 Union Camp Patent Holding, Inc. Process for high consistency delignification using a low consistency alkali pretreatment
US5409570A (en) * 1989-02-15 1995-04-25 Union Camp Patent Holding, Inc. Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone
US5085734A (en) * 1989-02-15 1992-02-04 Union Camp Patent Holding, Inc. Methods of high consistency oxygen delignification using a low consistency alkali pretreatment
US5188708A (en) * 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
US5211811A (en) * 1989-02-15 1993-05-18 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignification
US5217574A (en) * 1989-02-15 1993-06-08 Union Camp Patent Holdings Inc. Process for oxygen delignifying high consistency pulp by removing and recycling pressate from alkaline pulp
US5164044A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5441603A (en) * 1990-05-17 1995-08-15 Union Camp Patent Holding, Inc. Method for chelation of pulp prior to ozone delignification
US5296099A (en) * 1990-05-17 1994-03-22 Union Camp Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with oxygen, ozone and chlorine dioxide
US5164043A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5472572A (en) * 1990-10-26 1995-12-05 Union Camp Patent Holding, Inc. Reactor for bleaching high consistency pulp with ozone
US5181989A (en) * 1990-10-26 1993-01-26 Union Camp Patent Holdings, Inc. Reactor for bleaching high consistency pulp with ozone
US5863389A (en) * 1990-10-26 1999-01-26 Union Camp Patent Holding, Inc. Pulp bleaching reactor for dispersing high consistency pulp into a gaseous bleaching agent containing ozone
US5520783A (en) * 1990-10-26 1996-05-28 Union Camp Patent Holding, Inc. Apparatus for bleaching high consistency pulp with ozone
US5174861A (en) * 1990-10-26 1992-12-29 Union Camp Patent Holdings, Inc. Method of bleaching high consistency pulp with ozone
US5173153A (en) * 1991-01-03 1992-12-22 Union Camp Patent Holding, Inc. Process for enhanced oxygen delignification using high consistency and a split alkali addition
US5451296A (en) * 1991-05-24 1995-09-19 Union Camp Patent Holding, Inc. Two stage pulp bleaching reactor
US6007678A (en) * 1992-11-27 1999-12-28 Eka Nobel Ab Process for delignification of lignocellulose-containing pulp with an organic peracid or salts thereof
US5693184A (en) * 1993-10-01 1997-12-02 Union Camp Patent Holding, Inc. Reduction of salt scale precipitation by control of process stream pH and salt concentration
US5554259A (en) * 1993-10-01 1996-09-10 Union Camp Patent Holdings, Inc. Reduction of salt scale precipitation by control of process stream Ph and salt concentration
US5736004A (en) * 1995-03-03 1998-04-07 Union Camp Patent Holding, Inc. Control scheme for rapid pulp delignification and bleaching
US5672247A (en) * 1995-03-03 1997-09-30 Union Camp Patent Holding, Inc. Control scheme for rapid pulp delignification and bleaching
USH1690H (en) * 1995-07-20 1997-11-04 Nye; Jeffrey Process for bleaching kraft pulp

Also Published As

Publication number Publication date
SE8101772L (sv) 1981-10-16
AU6957881A (en) 1981-10-22
NO811305L (no) 1981-10-16

Similar Documents

Publication Publication Date Title
CA1154205A (en) Brightness improvement of ozone bleached pulps
US4372812A (en) Chlorine free process for bleaching lignocellulosic pulp
US5296099A (en) Environmentally improved process for bleaching lignocellulosic materials with oxygen, ozone and chlorine dioxide
AU638017B2 (en) Environmentally improved process for bleaching lignocellulosic materials
US5164043A (en) Environmentally improved process for bleaching lignocellulosic materials with ozone
US5211811A (en) Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignification
CA2102713A1 (en) Process for bleaching of lignocellulose-containing material
US5770010A (en) Pulping process employing nascent oxygen
US5188708A (en) Process for high consistency oxygen delignification followed by ozone relignification
CA2363793A1 (en) Method to improve pulp yield and bleachability of lignocellulosic pulps
FI105213B (fi) Menetelmä valkaistun massan valmistamiseksi lignoselluloosamateriaalista
WO1992012288A1 (en) Split alkali addition for high consistency oxygen delignification
WO1996013634A1 (en) Process for delignification and bleaching of chemical wood pulps
US5389201A (en) Bleaching of kraft cellulosic pulp employing ozone and reduced consumption of chlorine containing bleaching agent
US5441603A (en) Method for chelation of pulp prior to ozone delignification
WO1992017639A1 (en) Method for reducing colored matter from bleach effluent using a dzd bleach sequence
WO1996002697A1 (en) Improved bleaching of high consistency lignocellulosic pulp
CA2036173C (en) Process for the chlorine-free bleaching and delignification of cellulose
AU671159B2 (en) Improved bleaching of high consistency lignocellulosic pulp
EP0720676A1 (en) Improved method for bleaching lignocellulosic pulp
HU216143B (hu) Eljárás nyers cellulóz ligninmentesítésére
WO1996033308A1 (en) Pulping process
JPH04308292A (ja) 脱墨パルプ含有クラフトパルプの漂白パルプ化法
JPH04222286A (ja) リグノセルロース物質の漂白方法
CA2258443A1 (en) Pulp bleaching process including final stage brightening step with salt of peroxymonosulfuric acid

Legal Events

Date Code Title Description
MKEX Expiry
MKEX Expiry

Effective date: 20000927