FI906076A - Process for bleaching chemical cellulose pulp to produce bleached absorbent pulp - Google Patents

Process for bleaching chemical cellulose pulp to produce bleached absorbent pulp Download PDF

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Publication number
FI906076A
FI906076A FI906076A FI906076A FI906076A FI 906076 A FI906076 A FI 906076A FI 906076 A FI906076 A FI 906076A FI 906076 A FI906076 A FI 906076A FI 906076 A FI906076 A FI 906076A
Authority
FI
Finland
Prior art keywords
pulp
bleaching chemical
chemical cellulose
produce bleached
bleaching
Prior art date
Application number
FI906076A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI96784B (en
FI906076A0 (en
Inventor
Alain 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=FI906076(A) "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 FI906076A0 publication Critical patent/FI906076A0/en
Publication of FI906076A publication Critical patent/FI906076A/en
Application granted granted Critical
Publication of FI96784B publication Critical patent/FI96784B/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.
FI906076A 1989-12-11 1990-12-10 A process for bleaching chemical cellulosic pulps to produce bleached absorbent pulps FI96784B (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 (3)

Publication Number Publication Date
FI906076A0 FI906076A0 (en) 1990-12-10
FI906076A true FI906076A (en) 1991-06-12
FI96784B FI96784B (en) 1996-05-15

Family

ID=9388342

Family Applications (1)

Application Number Title Priority Date Filing Date
FI906076A FI96784B (en) 1989-12-11 1990-12-10 A process for bleaching chemical cellulosic pulps to produce bleached absorbent pulps

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5916415A (en) * 1995-12-07 1999-06-29 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry

Families Citing this family (10)

* 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
SE9402726L (en) * 1994-08-16 1995-08-28 Kvaerner Pulping Tech Chemical pulp bleaching sequence comprising a sulfonating bleaching step
EP0858526A1 (en) 1995-02-17 1998-08-19 Ahlstrom Machinery Oy Method of pretreating pulp to be bleached with peroxide
FI105701B (en) * 1995-10-20 2000-09-29 Ahlstrom Machinery Oy Method and arrangement for treatment of pulp
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
US20230212821A1 (en) * 2020-06-16 2023-07-06 Kemira Oyj Method for pitch 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5916415A (en) * 1995-12-07 1999-06-29 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry

Also Published As

Publication number Publication date
FR2655668B1 (en) 1995-06-09
DE69011636T2 (en) 1995-01-26
NO905333D0 (en) 1990-12-10
FI96784B (en) 1996-05-15
EP0433138B1 (en) 1994-08-17
ES2062463T3 (en) 1994-12-16
NO176809B (en) 1995-02-20
FR2655668A1 (en) 1991-06-14
DE69011636D1 (en) 1994-09-22
NO905333L (en) 1991-06-12
FI906076A0 (en) 1990-12-10
DK0433138T3 (en) 1994-12-05
ATE110129T1 (en) 1994-09-15
EP0433138A1 (en) 1991-06-19
NO176809C (en) 1995-05-31

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Legal Events

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Owner name: LA CELLULOSE DU PIN

FCK Appeal rejected

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RF Appeal filed
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