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ES2062463T3 - BLEACHING PROCEDURE FOR CHEMICAL CELLULOSIC PASTA. - Google Patents

BLEACHING PROCEDURE FOR CHEMICAL CELLULOSIC PASTA.

Info

Publication number
ES2062463T3
ES2062463T3 ES90403462T ES90403462T ES2062463T3 ES 2062463 T3 ES2062463 T3 ES 2062463T3 ES 90403462 T ES90403462 T ES 90403462T ES 90403462 T ES90403462 T ES 90403462T ES 2062463 T3 ES2062463 T3 ES 2062463T3
Authority
ES
Spain
Prior art keywords
pasta
bleaching procedure
bleaching
pulps
chemical cellulosic
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.)
Expired - Lifetime
Application number
ES90403462T
Other languages
Spanish (es)
Inventor
Alain M Siohan
Jean-Claude M Doignie
Jean-Claude M Pommier
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.)
Cellulose du Pin SA
Original Assignee
Cellulose du Pin SA
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=ES2062463(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Cellulose du Pin SA filed Critical Cellulose du Pin SA
Application granted granted Critical
Publication of ES2062463T3 publication Critical patent/ES2062463T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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.
ES90403462T 1989-12-11 1990-12-06 BLEACHING PROCEDURE FOR CHEMICAL CELLULOSIC PASTA. Expired - Lifetime ES2062463T3 (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
ES2062463T3 true ES2062463T3 (en) 1994-12-16

Family

ID=9388342

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90403462T Expired - Lifetime ES2062463T3 (en) 1989-12-11 1990-12-06 BLEACHING PROCEDURE FOR CHEMICAL CELLULOSIC PASTA.

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
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
CA2239876A1 (en) * 1995-12-07 1997-07-31 Beloit Technologies, Inc. Oxygen delignification of medium consistency 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
CN115702272B (en) * 2020-06-16 2024-08-16 凯米拉公司 Method for controlling resin 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
FI96784B (en) 1996-05-15
NO905333D0 (en) 1990-12-10
FR2655668A1 (en) 1991-06-14
DE69011636T2 (en) 1995-01-26
NO176809B (en) 1995-02-20
DK0433138T3 (en) 1994-12-05
FR2655668B1 (en) 1995-06-09
NO905333L (en) 1991-06-12
EP0433138A1 (en) 1991-06-19
FI906076A0 (en) 1990-12-10
EP0433138B1 (en) 1994-08-17
NO176809C (en) 1995-05-31
DE69011636D1 (en) 1994-09-22
FI906076A (en) 1991-06-12
ATE110129T1 (en) 1994-09-15

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