NO176809C - Process for bleaching chemical cellulose pulp to obtain absorbent bleached pulp - Google Patents

Process for bleaching chemical cellulose pulp to obtain absorbent bleached pulp

Info

Publication number
NO176809C
NO176809C NO905333A NO905333A NO176809C NO 176809 C NO176809 C NO 176809C NO 905333 A NO905333 A NO 905333A NO 905333 A NO905333 A NO 905333A NO 176809 C NO176809 C NO 176809C
Authority
NO
Norway
Prior art keywords
pulp
bleaching chemical
chemical cellulose
obtain absorbent
bleaching
Prior art date
Application number
NO905333A
Other languages
Norwegian (no)
Other versions
NO176809B (en
NO905333L (en
NO905333D0 (en
Inventor
Alan Siohan
Jean-Claude Doignie
Jean-Claude Pommier
Original Assignee
Du Pin Cellulose
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9388342&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NO176809(C) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Du Pin Cellulose filed Critical Du Pin Cellulose
Publication of NO905333D0 publication Critical patent/NO905333D0/en
Publication of NO905333L publication Critical patent/NO905333L/en
Publication of NO176809B publication Critical patent/NO176809B/en
Publication of NO176809C publication Critical patent/NO176809C/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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Noodles (AREA)

Abstract

Process for bleaching chemical cellulose pulps with a view to obtaining absorbent, bleached pulps, without using chlorine. The process for bleaching chemical pulps employs a sequence of different treatments comprising at least one treatment with a bleaching agent not containing chlorine, at least two alkaline treatments and at least one acidic treatment, lasting at least 5 minutes, inserted between the two alkaline treatments.
NO905333A 1989-12-11 1990-12-10 Process for bleaching chemical cellulose pulp to obtain absorbent bleached pulp NO176809C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8916322A FR2655668B1 (en) 1989-12-11 1989-12-11 PROCESS FOR BLEACHING CHEMICAL CELLULOSIC PASTA.

Publications (4)

Publication Number Publication Date
NO905333D0 NO905333D0 (en) 1990-12-10
NO905333L NO905333L (en) 1991-06-12
NO176809B NO176809B (en) 1995-02-20
NO176809C true NO176809C (en) 1995-05-31

Family

ID=9388342

Family Applications (1)

Application Number Title Priority Date Filing Date
NO905333A NO176809C (en) 1989-12-11 1990-12-10 Process for bleaching chemical cellulose pulp to obtain absorbent bleached pulp

Country Status (8)

Country Link
EP (1) EP0433138B1 (en)
AT (1) ATE110129T1 (en)
DE (1) DE69011636T2 (en)
DK (1) DK0433138T3 (en)
ES (1) ES2062463T3 (en)
FI (1) FI96784B (en)
FR (1) FR2655668B1 (en)
NO (1) NO176809C (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695947B1 (en) * 1992-09-18 1994-10-21 Saint Gobain Papier Bois Gie C Process for bleaching chemical cellulosic pastes.
FI925159A0 (en) * 1992-11-13 1992-11-13 Ahlstroem Oy FOERFARANDE FOER BLEKNING AV MASSA
SE500616C2 (en) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Bleaching of chemical pulp with peroxide at overpressure
BE1007700A3 (en) * 1993-11-04 1995-10-03 Solvay Interox Method of laundering of chemical pulp.
FI944348A (en) * 1994-09-19 1996-03-20 Ahlstroem Oy Procedure for bleaching of pulp
SE502135C2 (en) * 1994-08-16 1995-08-28 Kvaerner Pulping Tech Chemical pulp bleaching sequence comprising a sulfonating bleaching step
US6736934B1 (en) 1995-02-17 2004-05-18 Andritz Oy Method of pretreating pulp in an acid tower prior to bleaching with peroxide
FI105701B (en) * 1995-10-20 2000-09-29 Ahlstrom Machinery Oy Method and arrangement for treatment of pulp
ATE193912T1 (en) * 1995-12-07 2000-06-15 Beloit Technologies Inc DELIGNIFICATION OF A MEDIUM CONSISTENCY PAPER PULP USING OXYGEN
DE102012009593B4 (en) 2012-05-07 2019-03-07 Innovent E.V. Process for the degradation of polysaccharides selected from the substance groups of the glycosaminoglycans and their derivatives and the alginates
BR112022022809A2 (en) * 2020-06-16 2022-12-27 Kemira Oyj METHOD FOR PIT CONTROL DURING BLEACHING

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE448006B (en) * 1981-09-21 1987-01-12 Mo Och Domsjoe Ab PROCEDURE FOR WHITING CELLULOSAMASSA INCLUDING AN ACTIVATION STEP WITH NITROGEN OXIDES

Also Published As

Publication number Publication date
EP0433138A1 (en) 1991-06-19
FI96784B (en) 1996-05-15
NO176809B (en) 1995-02-20
DE69011636T2 (en) 1995-01-26
DE69011636D1 (en) 1994-09-22
ES2062463T3 (en) 1994-12-16
FI906076A (en) 1991-06-12
FI906076A0 (en) 1990-12-10
EP0433138B1 (en) 1994-08-17
FR2655668A1 (en) 1991-06-14
ATE110129T1 (en) 1994-09-15
NO905333L (en) 1991-06-12
DK0433138T3 (en) 1994-12-05
FR2655668B1 (en) 1995-06-09
NO905333D0 (en) 1990-12-10

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Legal Events

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