CA946107A - Process for bleaching cellulose-containing materials - Google Patents

Process for bleaching cellulose-containing materials

Info

Publication number
CA946107A
CA946107A CA112,573A CA112573A CA946107A CA 946107 A CA946107 A CA 946107A CA 112573 A CA112573 A CA 112573A CA 946107 A CA946107 A CA 946107A
Authority
CA
Canada
Prior art keywords
containing materials
bleaching cellulose
bleaching
cellulose
materials
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
Application number
CA112,573A
Other languages
English (en)
Other versions
CA112573S (en
Inventor
Ingmar Lassenius
Pauli Paasonen
Pekka Koivisto
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.)
Kymmene Oy
Original Assignee
Kymin Osakeyhtio Kymmene AB
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
Application filed by Kymin Osakeyhtio Kymmene AB filed Critical Kymin Osakeyhtio Kymmene AB
Application granted granted Critical
Publication of CA946107A publication Critical patent/CA946107A/en
Expired 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)
CA112,573A 1970-05-11 1971-05-10 Process for bleaching cellulose-containing materials Expired CA946107A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI701311A FI45574C (fi) 1970-05-11 1970-05-11 Menetelmä selluloosapitoisten aineiden valkaisemiseksi.

Publications (1)

Publication Number Publication Date
CA946107A true CA946107A (en) 1974-04-30

Family

ID=8505417

Family Applications (1)

Application Number Title Priority Date Filing Date
CA112,573A Expired CA946107A (en) 1970-05-11 1971-05-10 Process for bleaching cellulose-containing materials

Country Status (7)

Country Link
BR (1) BR7102828D0 (pl)
CA (1) CA946107A (pl)
DE (1) DE2040763C3 (pl)
FI (1) FI45574C (pl)
NO (1) NO127205B (pl)
SE (1) SE373396B (pl)
ZA (1) ZA712989B (pl)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU607026B2 (en) * 1988-01-28 1991-02-21 Degussa A.G. Process for producing semibleached kraft pulp
US5143580A (en) * 1990-04-23 1992-09-01 Eka Nobel Ab Process for reducing the amount of halogenated organic compounds in spent liquor from a peroxide-halogen bleaching sequence
US5149442A (en) * 1990-04-23 1992-09-22 Eka Nobel Ab Reduction of halogenated organic compounds in spent bleach liquor
US5310458A (en) * 1989-06-06 1994-05-10 Eka Nobel Ab Process for bleaching lignocellulose-containing pulps
US5571377A (en) * 1993-06-08 1996-11-05 Kvaerner Pulping Technologies Ab Process for peroxide bleaching of chemical pulp in a pressurized bleach vessel
US5916415A (en) * 1995-12-07 1999-06-29 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry
US6375797B1 (en) * 1996-06-20 2002-04-23 Andritz-Ahlstrom Oy Bleaching chemical pulp in a PkDQ-Po Sequence

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE373395B (sv) * 1972-12-19 1975-02-03 Mo Och Domsjoe Ab Forfarande for framstellning av cellulosamassa med hog ljushet genom uppslutning av ved med syrgas under tryck i nervaro av en kokvetska forsatt med basiska neutralisationsmedel
SE420430B (sv) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
US4372812A (en) * 1978-04-07 1983-02-08 International Paper Company Chlorine free process for bleaching lignocellulosic pulp
US4410397A (en) 1978-04-07 1983-10-18 International Paper Company Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives
FR2457339A1 (fr) * 1979-05-25 1980-12-19 Interox Procede pour la delignification et le blanchiment de pates cellulosiques chimiques et semi-chimiques
DE3207157C1 (de) * 1982-02-27 1983-06-09 Degussa Ag, 6000 Frankfurt Verfahren zur Herstellung von halbgebleichten Zellstoffen
FR2566015B1 (fr) * 1984-06-15 1986-08-29 Centre Tech Ind Papier Procede de blanchiment de pate mecanique par le peroxyde d'hydrogene
DE3428352A1 (de) * 1984-08-01 1986-02-13 Degussa Ag, 6000 Frankfurt Verfahren zur delignifizierung und bleiche von zellstoffen
FI89516B (fi) 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande foer blekning av cellulosamassa med otson
BE1011129A4 (fr) * 1997-04-25 1999-05-04 Solvay Interox Procede continu de delignification et/ou de blanchiment de pate a papier chimique vierge ou recyclee.

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU607026B2 (en) * 1988-01-28 1991-02-21 Degussa A.G. Process for producing semibleached kraft pulp
US5310458A (en) * 1989-06-06 1994-05-10 Eka Nobel Ab Process for bleaching lignocellulose-containing pulps
US5143580A (en) * 1990-04-23 1992-09-01 Eka Nobel Ab Process for reducing the amount of halogenated organic compounds in spent liquor from a peroxide-halogen bleaching sequence
US5149442A (en) * 1990-04-23 1992-09-22 Eka Nobel Ab Reduction of halogenated organic compounds in spent bleach liquor
US5571377A (en) * 1993-06-08 1996-11-05 Kvaerner Pulping Technologies Ab Process for peroxide bleaching of chemical pulp in a pressurized bleach vessel
US5916415A (en) * 1995-12-07 1999-06-29 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry
EP0866895B1 (en) * 1995-12-07 2000-06-14 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry
US6375797B1 (en) * 1996-06-20 2002-04-23 Andritz-Ahlstrom Oy Bleaching chemical pulp in a PkDQ-Po Sequence

Also Published As

Publication number Publication date
FI45574B (pl) 1972-04-04
FI45574C (fi) 1972-07-10
BR7102828D0 (pt) 1973-05-03
NO127205B (pl) 1973-05-21
SE373396B (sv) 1975-02-03
ZA712989B (en) 1972-01-26
DE2040763C3 (de) 1975-10-02
DE2040763A1 (de) 1971-11-18
DE2040763B2 (pl) 1975-02-20

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