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FI96784B - A process for bleaching chemical cellulosic pulps to produce bleached absorbent pulps - Google Patents

A process for bleaching chemical cellulosic pulps to produce bleached absorbent pulps

Info

Publication number
FI96784B
FI96784B FI906076A FI906076A FI96784B FI 96784 B FI96784 B FI 96784B FI 906076 A FI906076 A FI 906076A FI 906076 A FI906076 A FI 906076A FI 96784 B FI96784 B FI 96784B
Authority
FI
Finland
Prior art keywords
pulps
bleaching chemical
absorbent
chemical cellulosic
produce bleached
Prior art date
Application number
FI906076A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI906076A0 (en
FI906076A (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=FI96784(B) "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 FI906076A (en) 1991-06-12
FI96784B true 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)

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
SE9301960L (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
CA2211223C (en) 1995-02-17 2002-04-30 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
DE69608910T2 (en) * 1995-12-07 2001-01-18 Beloit Technologies, Inc. DELIGNIFICATION OF A MEDIUM-CONSISTENCY PAPER-SELLED MATERIAL WITH 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
WO2021255335A1 (en) * 2020-06-16 2021-12-23 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

Also Published As

Publication number Publication date
DE69011636D1 (en) 1994-09-22
EP0433138B1 (en) 1994-08-17
NO176809C (en) 1995-05-31
FI906076A0 (en) 1990-12-10
ATE110129T1 (en) 1994-09-15
NO905333L (en) 1991-06-12
DK0433138T3 (en) 1994-12-05
FR2655668B1 (en) 1995-06-09
DE69011636T2 (en) 1995-01-26
ES2062463T3 (en) 1994-12-16
NO905333D0 (en) 1990-12-10
FI906076A (en) 1991-06-12
NO176809B (en) 1995-02-20
EP0433138A1 (en) 1991-06-19
FR2655668A1 (en) 1991-06-14

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Legal Events

Date Code Title Description
BB Publication of examined application
RF Appeal filed

Owner name: LA CELLULOSE DU PIN

FCK Appeal rejected

Free format text: BY BOARD OF APPEAL

RF Appeal filed
RFK Appeal accepted

Free format text: PATENT IN FORCE

FG Patent granted

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