LT3269B - Process for bleaching of lignocellulose-containing pulps - Google Patents

Process for bleaching of lignocellulose-containing pulps Download PDF

Info

Publication number
LT3269B
LT3269B LTIP444A LTIP444A LT3269B LT 3269 B LT3269 B LT 3269B LT IP444 A LTIP444 A LT IP444A LT IP444 A LTIP444 A LT IP444A LT 3269 B LT3269 B LT 3269B
Authority
LT
Lithuania
Prior art keywords
treatment
pulp
stage
bleaching
hydrogen peroxide
Prior art date
Application number
LTIP444A
Other languages
English (en)
Lithuanian (lt)
Inventor
Per G Lundgren
Lillemor K Holtinger
Jiri J Basta
Marie R Samuelsson
Original Assignee
Eka Nobel 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 Eka Nobel Ab filed Critical Eka Nobel Ab
Publication of LTIP444A publication Critical patent/LTIP444A/xx
Publication of LT3269B publication Critical patent/LT3269B/lt

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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
LTIP444A 1989-06-06 1993-03-19 Process for bleaching of lignocellulose-containing pulps LT3269B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8902058A SE467006B (sv) 1989-06-06 1989-06-06 Blekning av kemisk massa med peroxid varvid massan foerst behandlas med en komplexbildare

Publications (2)

Publication Number Publication Date
LTIP444A LTIP444A (en) 1994-11-25
LT3269B true LT3269B (en) 1995-05-25

Family

ID=20376204

Family Applications (1)

Application Number Title Priority Date Filing Date
LTIP444A LT3269B (en) 1989-06-06 1993-03-19 Process for bleaching of lignocellulose-containing pulps

Country Status (3)

Country Link
LT (1) LT3269B (sv)
RU (1) RU2026437C1 (sv)
SE (1) SE467006B (sv)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251731A (en) 1963-02-11 1966-05-17 Andrew J Gard Bleaching of wood pulp with a sequestering agent and hydrogen peroxide
SE420430B (sv) 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
SU903429A1 (ru) 1980-06-05 1982-02-07 Центральный научно-исследовательский институт бумаги Способ отбелки древесной массы
EP0285530B1 (fr) 1987-04-02 1993-01-13 Elf Atochem S.A. Procédé de blanchiment de pâtes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251731A (en) 1963-02-11 1966-05-17 Andrew J Gard Bleaching of wood pulp with a sequestering agent and hydrogen peroxide
SE420430B (sv) 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
SU903429A1 (ru) 1980-06-05 1982-02-07 Центральный научно-исследовательский институт бумаги Способ отбелки древесной массы
EP0285530B1 (fr) 1987-04-02 1993-01-13 Elf Atochem S.A. Procédé de blanchiment de pâtes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
G GELLERSTEDT, I PETTERSSON: "Chemical Aspects of Hydrogen Peroxide Bleaching.", JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY

Also Published As

Publication number Publication date
SE8902058D0 (sv) 1989-06-06
LTIP444A (en) 1994-11-25
SE467006B (sv) 1992-05-11
RU2026437C1 (ru) 1995-01-09
SE8902058L (sv) 1990-12-07

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MM9A Lapsed patents

Effective date: 20030319