ATE110129T1 - METHOD OF BLEACHING CHEMICAL PULP. - Google Patents

METHOD OF BLEACHING CHEMICAL PULP.

Info

Publication number
ATE110129T1
ATE110129T1 AT90403462T AT90403462T ATE110129T1 AT E110129 T1 ATE110129 T1 AT E110129T1 AT 90403462 T AT90403462 T AT 90403462T AT 90403462 T AT90403462 T AT 90403462T AT E110129 T1 ATE110129 T1 AT E110129T1
Authority
AT
Austria
Prior art keywords
bleaching chemical
chemical pulp
pulps
bleaching
treatments
Prior art date
Application number
AT90403462T
Other languages
German (de)
Inventor
Alain M Siohan
Jean-Claude M Doignie
Jean-Claude M 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=ATE110129(T1) "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
Application granted granted Critical
Publication of ATE110129T1 publication Critical patent/ATE110129T1/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.
AT90403462T 1989-12-11 1990-12-06 METHOD OF BLEACHING CHEMICAL PULP. ATE110129T1 (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 (1)

Publication Number Publication Date
ATE110129T1 true ATE110129T1 (en) 1994-09-15

Family

ID=9388342

Family Applications (1)

Application Number Title Priority Date Filing Date
AT90403462T ATE110129T1 (en) 1989-12-11 1990-12-06 METHOD OF BLEACHING CHEMICAL 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
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
BR9611974A (en) * 1995-12-07 1999-11-03 Beloit Technologies Inc Oxygen delignification of medium pulp slurry.
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

Also Published As

Publication number Publication date
FR2655668B1 (en) 1995-06-09
ES2062463T3 (en) 1994-12-16
DK0433138T3 (en) 1994-12-05
DE69011636T2 (en) 1995-01-26
FI906076A (en) 1991-06-12
EP0433138A1 (en) 1991-06-19
EP0433138B1 (en) 1994-08-17
FR2655668A1 (en) 1991-06-14
NO176809B (en) 1995-02-20
FI96784B (en) 1996-05-15
NO176809C (en) 1995-05-31
FI906076A0 (en) 1990-12-10
NO905333D0 (en) 1990-12-10
DE69011636D1 (en) 1994-09-22
NO905333L (en) 1991-06-12

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
EELA Cancelled due to lapse of time