EP1607519A1 - Activateur pour le blanchiment du pâte à papier - Google Patents

Activateur pour le blanchiment du pâte à papier Download PDF

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Publication number
EP1607519A1
EP1607519A1 EP04253546A EP04253546A EP1607519A1 EP 1607519 A1 EP1607519 A1 EP 1607519A1 EP 04253546 A EP04253546 A EP 04253546A EP 04253546 A EP04253546 A EP 04253546A EP 1607519 A1 EP1607519 A1 EP 1607519A1
Authority
EP
European Patent Office
Prior art keywords
anhydride
carboxylic acid
process according
range
acid anhydride
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.)
Granted
Application number
EP04253546A
Other languages
German (de)
English (en)
Other versions
EP1607519B1 (fr
Inventor
Alan Michael Marland
Alison Jane Mathews
Gary Miller
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.)
Warwick International Group Ltd
Original Assignee
Warwick International Group 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
Priority to PT04253546T priority Critical patent/PT1607519E/pt
Priority to DE602004011911T priority patent/DE602004011911T9/de
Priority to AT04253546T priority patent/ATE386837T1/de
Priority to EP04253546A priority patent/EP1607519B1/fr
Priority to ES04253546T priority patent/ES2300713T3/es
Priority to PL04253546T priority patent/PL1607519T3/pl
Application filed by Warwick International Group Ltd filed Critical Warwick International Group Ltd
Priority to CA002569467A priority patent/CA2569467A1/fr
Priority to US11/570,140 priority patent/US20070246177A1/en
Priority to PCT/GB2005/002312 priority patent/WO2005121443A1/fr
Publication of EP1607519A1 publication Critical patent/EP1607519A1/fr
Application granted granted Critical
Publication of EP1607519B1 publication Critical patent/EP1607519B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids

Definitions

  • Wood and non wood pulp are valuable raw materials in the paper industry and it is desirable that a high degree of whiteness is obtainable.
  • the water used in step a) is of a temperature between 5°C-100°C, preferably between 10°C-50°C and more preferably between 15°C-30°C. At cooler temperatures the generation of the percarboxylic acid may be inhibited whilst at higher temperatures, although the generation would be rapid, it is anticipated that degradation of the percarboxylic acid species would be promoted.
  • the amount of hydrogen peroxide added in step b), based on a 50% solution is a value in the range 0.5-6wt%, more preferably in the range 1.5-4.0wt% and most preferably in the range 1.75-2.5wt%.
  • the mixture of acetic anhydride and carboxylic acid anhydride with a higher flashpoint can then be used as the carboxylic acid anhydride compound in the method for bleaching cellulosic fibres of the invention.
  • the molar ratio of carboxylic acid anhydride compound to hydrogen peroxide added is preferably in the range 1:1 to 1:10, preferably 1:1.5 to 1:6, more preferably 1:2 to 1:4. Most preferably the molar ratio is about 1:3. In terms of the number of moles added, it is preferable that more hydrogen peroxide is required than carboxylic acid anhydride compound in order to drive the reaction to form perhydroxyl ion.
  • the resultant solution contains percarboxylic acid in a concentration range of 0.1-10%, more preferably 0.25-5% and most preferably 0.5-2%.
  • the final step (step g)) of the process is to contact the dilute percarboxylic acid solution with a cellulosic fibre suspension e.g formed from pulp.
  • the pulp may be any sort of pulp, including chemical and mechanical pulp and mixture thereof, including recycled material. Wood and non wood fibres can be bleached using this process.
  • the product may be used directly to form paper or board or may be fully or partially dewatered to form a pulp intermediate for eventual paper or board manufacture.
  • the data shows that a superior bleaching performance is achieved using acetic anhydride derived peracetic acid as compared to preformed peracetic acid.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
  • Polyurethanes Or Polyureas (AREA)
EP04253546A 2004-06-14 2004-06-14 Activateur pour le blanchiment du pâte à papier Expired - Lifetime EP1607519B1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
AT04253546T ATE386837T1 (de) 2004-06-14 2004-06-14 Aktivator zum zellstoffbleichen
EP04253546A EP1607519B1 (fr) 2004-06-14 2004-06-14 Activateur pour le blanchiment du pâte à papier
ES04253546T ES2300713T3 (es) 2004-06-14 2004-06-14 Activador para el blanqueado de pasta de papel.
PL04253546T PL1607519T3 (pl) 2004-06-14 2004-06-14 Aktywator bielenia ścieru
PT04253546T PT1607519E (pt) 2004-06-14 2004-06-14 Activador para branqueamento de pasta
DE602004011911T DE602004011911T9 (de) 2004-06-14 2004-06-14 Aktivator zum Zellstoffbleichen
CA002569467A CA2569467A1 (fr) 2004-06-14 2005-06-10 Activateur pour le blanchiment de pate a papier
US11/570,140 US20070246177A1 (en) 2004-06-14 2005-06-10 Activator for Pulp Bleaching
PCT/GB2005/002312 WO2005121443A1 (fr) 2004-06-14 2005-06-10 Activateur pour le blanchiment de pate a papier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04253546A EP1607519B1 (fr) 2004-06-14 2004-06-14 Activateur pour le blanchiment du pâte à papier

Publications (2)

Publication Number Publication Date
EP1607519A1 true EP1607519A1 (fr) 2005-12-21
EP1607519B1 EP1607519B1 (fr) 2008-02-20

Family

ID=34930404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04253546A Expired - Lifetime EP1607519B1 (fr) 2004-06-14 2004-06-14 Activateur pour le blanchiment du pâte à papier

Country Status (9)

Country Link
US (1) US20070246177A1 (fr)
EP (1) EP1607519B1 (fr)
AT (1) ATE386837T1 (fr)
CA (1) CA2569467A1 (fr)
DE (1) DE602004011911T9 (fr)
ES (1) ES2300713T3 (fr)
PL (1) PL1607519T3 (fr)
PT (1) PT1607519E (fr)
WO (1) WO2005121443A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007144376A2 (fr) * 2006-06-14 2007-12-21 Henkel Ag & Co. Kgaa Agent éclaircissant et/ou colorant comprenant des esters et/ou des anhydrides

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8268122B2 (en) * 2005-12-02 2012-09-18 Akzo Nobel N.V. Process of producing high-yield pulp
WO2021255335A1 (fr) * 2020-06-16 2021-12-23 Kemira Oyj Procédé de contrôle de poix pendant le blanchiment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3227655A (en) * 1957-11-25 1966-01-04 Fmc Corp Process for preparation of a bleaching agent
EP0456032A1 (fr) * 1990-04-25 1991-11-13 Hoechst Japan Limited Procédé de blanchiment de pâtes
WO1994012722A1 (fr) * 1992-11-27 1994-06-09 Eka Nobel Ab Procede pour blanchir la pate a papier contenant de la lignocellulose
EP0670928A1 (fr) 1992-11-27 1995-09-13 Eka Nobel Ab Procede de delignification de pulpe contenant de la cellulose ligneuse.
GB2304126A (en) * 1995-08-10 1997-03-12 Warwick Int Group Pulp treatment process

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2377038A (en) * 1941-09-15 1945-05-29 Du Pont Manufacture of peracids
US4294575A (en) * 1979-01-02 1981-10-13 Monsanto Company Peroxide stabilization
FR2457339A1 (fr) * 1979-05-25 1980-12-19 Interox Procede pour la delignification et le blanchiment de pates cellulosiques chimiques et semi-chimiques

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3227655A (en) * 1957-11-25 1966-01-04 Fmc Corp Process for preparation of a bleaching agent
EP0456032A1 (fr) * 1990-04-25 1991-11-13 Hoechst Japan Limited Procédé de blanchiment de pâtes
WO1994012722A1 (fr) * 1992-11-27 1994-06-09 Eka Nobel Ab Procede pour blanchir la pate a papier contenant de la lignocellulose
EP0670928A1 (fr) 1992-11-27 1995-09-13 Eka Nobel Ab Procede de delignification de pulpe contenant de la cellulose ligneuse.
EP0670929A1 (fr) 1992-11-27 1995-09-13 Eka Nobel Ab Procede pour blanchir la pate a papier contenant de la lignocellulose.
GB2304126A (en) * 1995-08-10 1997-03-12 Warwick Int Group Pulp treatment process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007144376A2 (fr) * 2006-06-14 2007-12-21 Henkel Ag & Co. Kgaa Agent éclaircissant et/ou colorant comprenant des esters et/ou des anhydrides
WO2007144376A3 (fr) * 2006-06-14 2008-06-05 Henkel Kgaa Agent éclaircissant et/ou colorant comprenant des esters et/ou des anhydrides

Also Published As

Publication number Publication date
PL1607519T3 (pl) 2008-07-31
PT1607519E (pt) 2008-04-16
ES2300713T3 (es) 2008-06-16
DE602004011911T2 (de) 2008-08-28
ATE386837T1 (de) 2008-03-15
EP1607519B1 (fr) 2008-02-20
CA2569467A1 (fr) 2005-12-22
WO2005121443A1 (fr) 2005-12-22
DE602004011911T9 (de) 2009-01-02
DE602004011911D1 (de) 2008-04-03
US20070246177A1 (en) 2007-10-25

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