RU2026437C1 - Способ многоступенчатой отбелки целлюлозы - Google Patents

Способ многоступенчатой отбелки целлюлозы Download PDF

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Publication number
RU2026437C1
RU2026437C1 SU904830158A SU4830158A RU2026437C1 RU 2026437 C1 RU2026437 C1 RU 2026437C1 SU 904830158 A SU904830158 A SU 904830158A SU 4830158 A SU4830158 A SU 4830158A RU 2026437 C1 RU2026437 C1 RU 2026437C1
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RU
Russia
Prior art keywords
stage
cellulose
treatment
hydrogen peroxide
pulp
Prior art date
Application number
SU904830158A
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English (en)
Russian (ru)
Inventor
Г.Лундгрен Пер
К.Хольтингер Лиллемор
Й.Баста Юри
Р.Самуельссон Мари (Sе)
Original Assignee
Ека Нобель АБ
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.)
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Publication date
Application filed by Ека Нобель АБ filed Critical Ека Нобель АБ
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Publication of RU2026437C1 publication Critical patent/RU2026437C1/ru

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    • 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

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
SU904830158A 1989-06-06 1990-06-05 Способ многоступенчатой отбелки целлюлозы RU2026437C1 (ru)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8902058-0 1989-06-06
SE8902058A SE467006B (sv) 1989-06-06 1989-06-06 Blekning av kemisk massa med peroxid varvid massan foerst behandlas med en komplexbildare

Publications (1)

Publication Number Publication Date
RU2026437C1 true RU2026437C1 (ru) 1995-01-09

Family

ID=20376204

Family Applications (1)

Application Number Title Priority Date Filing Date
SU904830158A RU2026437C1 (ru) 1989-06-06 1990-06-05 Способ многоступенчатой отбелки целлюлозы

Country Status (3)

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

Family Cites Families (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
FR2613388B1 (fr) 1987-04-02 1990-05-04 Atochem Procede de blanchiment de pates

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Journal of Wood Chemistry and Technology" 1982, 2/3/, p.231-250. *

Also Published As

Publication number Publication date
SE8902058D0 (sv) 1989-06-06
LT3269B (en) 1995-05-25
LTIP444A (en) 1994-11-25
SE467006B (sv) 1992-05-11
SE8902058L (sv) 1990-12-07

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MM4A The patent is invalid due to non-payment of fees

Effective date: 20030606