DE69611091D1 - PEROXIDE BLEACHING OF CELLULAR - Google Patents

PEROXIDE BLEACHING OF CELLULAR

Info

Publication number
DE69611091D1
DE69611091D1 DE69611091T DE69611091T DE69611091D1 DE 69611091 D1 DE69611091 D1 DE 69611091D1 DE 69611091 T DE69611091 T DE 69611091T DE 69611091 T DE69611091 T DE 69611091T DE 69611091 D1 DE69611091 D1 DE 69611091D1
Authority
DE
Germany
Prior art keywords
pulp
peroxide bleaching
magnesium oxide
cellular
peroxide
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
DE69611091T
Other languages
German (de)
Inventor
Hayden Vincent
Alexander Mclean
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.)
Orica Australia Pty Ltd
Original Assignee
Orica Australia Pty Ltd
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 Orica Australia Pty Ltd filed Critical Orica Australia Pty Ltd
Application granted granted Critical
Publication of DE69611091D1 publication Critical patent/DE69611091D1/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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
    • 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)
  • Detergent Compositions (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Cosmetics (AREA)

Abstract

A process for peroxide bleaching of pulp using magnesium oxide as sole alkaline source wherein said pulp is bleached in the presence of hydrogen peroxide for a maximum period of 180 minutes and achievement of a target ISO brightness of 65 in regard to freshly prepared pulp characterised in that said magnesium oxide is utilised as MgO particles having a particle size of 5-500 microns and a particle surface area (PSA) of between 20-60 m<2>/g. By using such parameters, a peroxide bleaching process may be carried out most efficiently on a commercial scale.
DE69611091T 1995-06-13 1996-06-13 PEROXIDE BLEACHING OF CELLULAR Expired - Lifetime DE69611091D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPN3520A AUPN352095A0 (en) 1995-06-13 1995-06-13 Peroxide bleaching of pulp
PCT/AU1996/000354 WO1996041917A1 (en) 1995-06-13 1996-06-13 Peroxide bleaching of pulp

Publications (1)

Publication Number Publication Date
DE69611091D1 true DE69611091D1 (en) 2001-01-04

Family

ID=3787861

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69611091T Expired - Lifetime DE69611091D1 (en) 1995-06-13 1996-06-13 PEROXIDE BLEACHING OF CELLULAR

Country Status (7)

Country Link
EP (1) EP0832323B1 (en)
KR (1) KR19990022875A (en)
AT (1) ATE197825T1 (en)
AU (1) AUPN352095A0 (en)
CA (1) CA2224677C (en)
DE (1) DE69611091D1 (en)
WO (1) WO1996041917A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7052578B2 (en) * 2000-01-28 2006-05-30 Martin Marietta Magnesia Specialties, Inc. Process employing magnesium hydroxide in peroxide bleaching of mechanical pulp
US6881299B2 (en) 2001-05-16 2005-04-19 North American Paper Corporation Refiner bleaching with magnesium oxide and hydrogen peroxide
US6743332B2 (en) 2001-05-16 2004-06-01 Weyerhaeuser Company High temperature peroxide bleaching of mechanical pulps
US8845860B2 (en) 2010-09-16 2014-09-30 Georgia-Pacific Consumer Products Lp High brightness pulps from lignin rich waste papers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI52877B (en) * 1972-11-16 1977-08-31 Ahlstroem Oy
NO852330L (en) * 1985-06-10 1986-12-11 Papirind Forskningsinst PROCEDURES FOR PEROXIDE BLACKING OF CELLULOSE-CONTAINING Masses.
DE4400954B4 (en) * 1994-01-14 2007-03-01 Stefan Kürzeder Process for increasing the brightness of bleaching wood pulp with hydrogen peroxide

Also Published As

Publication number Publication date
WO1996041917A1 (en) 1996-12-27
ATE197825T1 (en) 2000-12-15
EP0832323A1 (en) 1998-04-01
AUPN352095A0 (en) 1995-07-06
EP0832323A4 (en) 1998-09-09
CA2224677C (en) 2003-12-02
CA2224677A1 (en) 1996-12-27
KR19990022875A (en) 1999-03-25
EP0832323B1 (en) 2000-11-29

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Legal Events

Date Code Title Description
8332 No legal effect for de