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SE8101772L - IMPROVING THE LIGHTNESS OF OZONE PATTERN PAPER - Google Patents

IMPROVING THE LIGHTNESS OF OZONE PATTERN PAPER

Info

Publication number
SE8101772L
SE8101772L SE8101772A SE8101772A SE8101772L SE 8101772 L SE8101772 L SE 8101772L SE 8101772 A SE8101772 A SE 8101772A SE 8101772 A SE8101772 A SE 8101772A SE 8101772 L SE8101772 L SE 8101772L
Authority
SE
Sweden
Prior art keywords
ozone
lightness
improving
pattern paper
brightness
Prior art date
Application number
SE8101772A
Other languages
Swedish (sv)
Inventor
M P Godsay
S S Bhattarcharjee
Original Assignee
Int 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 Int Paper Co filed Critical Int Paper Co
Publication of SE8101772L publication Critical patent/SE8101772L/en

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
    • D21C9/1036—Use 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)

Abstract

Use of hydrosulfite in the alkaline extraction stage of oxygen-ozone bleached kraft paper pulp results in improved brightness and reverted brightness of the pulp.
SE8101772A 1980-04-15 1981-03-20 IMPROVING THE LIGHTNESS OF OZONE PATTERN PAPER SE8101772L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14052080A 1980-04-15 1980-04-15

Publications (1)

Publication Number Publication Date
SE8101772L true SE8101772L (en) 1981-10-16

Family

ID=22491621

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8101772A SE8101772L (en) 1980-04-15 1981-03-20 IMPROVING THE LIGHTNESS OF OZONE PATTERN PAPER

Country Status (4)

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

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5472572A (en) * 1990-10-26 1995-12-05 Union Camp Patent Holding, Inc. Reactor for 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
US5188708A (en) * 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
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
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
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
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
US5181989A (en) * 1990-10-26 1993-01-26 Union Camp Patent Holdings, Inc. Reactor 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
US5441603A (en) * 1990-05-17 1995-08-15 Union Camp Patent Holding, Inc. Method for chelation of pulp prior to ozone delignification
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
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
EP0515303B2 (en) * 1991-05-24 2001-07-04 Union Camp Patent Holding, Inc. Method for ozone 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
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
US5736004A (en) * 1995-03-03 1998-04-07 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
NO811305L (en) 1981-10-16
CA1154205A (en) 1983-09-27
AU6957881A (en) 1981-10-22

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