SE8902058D0 - PROCEDURES FOR THE WHITING OF LIGNOCELLULOSA-CONTAINING MATERIAL - Google Patents

PROCEDURES FOR THE WHITING OF LIGNOCELLULOSA-CONTAINING MATERIAL

Info

Publication number
SE8902058D0
SE8902058D0 SE8902058A SE8902058A SE8902058D0 SE 8902058 D0 SE8902058 D0 SE 8902058D0 SE 8902058 A SE8902058 A SE 8902058A SE 8902058 A SE8902058 A SE 8902058A SE 8902058 D0 SE8902058 D0 SE 8902058D0
Authority
SE
Sweden
Prior art keywords
pulp
stage
interval
treatment
bleaching
Prior art date
Application number
SE8902058A
Other languages
Swedish (sv)
Other versions
SE467006B (en
SE8902058L (en
Inventor
P G Lundgren
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
Publication of SE8902058D0 publication Critical patent/SE8902058D0/en
Priority to SE8902058A priority Critical patent/SE467006B/en
Application filed by Eka Nobel Ab filed Critical Eka Nobel Ab
Priority to DE69004492T priority patent/DE69004492T3/en
Priority to DE199090850200T priority patent/DE402335T1/en
Priority to ES90850200T priority patent/ES2038097T5/en
Priority to AT90850200T priority patent/ATE97179T1/en
Priority to DK90850200T priority patent/DK0402335T4/en
Priority to EP90850200A priority patent/EP0402335B2/en
Priority to CA002017807A priority patent/CA2017807C/en
Priority to NZ233884A priority patent/NZ233884A/en
Priority to AU56217/90A priority patent/AU613272B2/en
Priority to FI902773A priority patent/FI107546B/en
Priority to SU904830158A priority patent/RU2026437C1/en
Priority to NO902479A priority patent/NO174354C/en
Priority to BR909002660A priority patent/BR9002660A/en
Priority to PT94287A priority patent/PT94287B/en
Priority to JP2146411A priority patent/JP2843892B2/en
Publication of SE8902058L publication Critical patent/SE8902058L/en
Priority to US07/813,058 priority patent/US5310458A/en
Publication of SE467006B publication Critical patent/SE467006B/en
Priority to LVP-92-600A priority patent/LV10517B/en
Priority to LTIP444A priority patent/LT3269B/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
    • D21C9/1026—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)

Abstract

The invention relates to a process, in association with bleaching lignocellulose-containing pulp, for rendering a peroxide-containing bleaching stage more efficient by means of the pulp, prior to such a stage, being treated with a sequestering agent, with the trace metal profile in the pulp being altered by treatment with the sequestering agent, in the absence of sulphite, at a pH within the interval from 3.1 up to 9.0 and at a temperature within the interval from 26 degree C up to 100 degree C, after which the treatment with a peroxide-containing substance is carried out in a second stage, at a pH within the interval from 7 up to 13, with the said two- stage treatment being carried out at an optional position in the bleaching sequence which is used for the pulp.
SE8902058A 1989-06-06 1989-06-06 Bleaching chemical pulp with peroxide, with the pulp first being treated with a sequestering agent SE467006B (en)

Priority Applications (19)

Application Number Priority Date Filing Date Title
SE8902058A SE467006B (en) 1989-06-06 1989-06-06 Bleaching chemical pulp with peroxide, with the pulp first being treated with a sequestering agent
DE69004492T DE69004492T3 (en) 1989-06-06 1990-05-21 Process for bleaching pulps containing lignocellulose.
DE199090850200T DE402335T1 (en) 1989-06-06 1990-05-21 METHOD FOR BLEACHING LIGNOCELLULOSE-CONTAINING CELLS.
ES90850200T ES2038097T5 (en) 1989-06-06 1990-05-21 PROCEDURE FOR WHITENING PAPER PASTES CONTAINING LIGNOCELLULOSE.
AT90850200T ATE97179T1 (en) 1989-06-06 1990-05-21 PROCESS FOR BLEACHING LIGNOCELLULOSE CONTAINING PULP.
DK90850200T DK0402335T4 (en) 1989-06-06 1990-05-21 Method for bleaching lignocellulosic pulp
EP90850200A EP0402335B2 (en) 1989-06-06 1990-05-21 Process for bleaching lignocellulose-containing pulps
CA002017807A CA2017807C (en) 1989-06-06 1990-05-30 Process for bleaching lignocellulose-containing pulps
NZ233884A NZ233884A (en) 1989-06-06 1990-05-31 Peroxide bleaching of ligno-cellulose-containing pulp: pretreatment with a complexing agent for trace metals
AU56217/90A AU613272B2 (en) 1989-06-06 1990-06-01 Process for bleaching lignocellulose-containing pulps
FI902773A FI107546B (en) 1989-06-06 1990-06-04 Method for bleaching lignocellulosic pulp
SU904830158A RU2026437C1 (en) 1989-06-06 1990-06-05 Method of multistep cellulose whitening
NO902479A NO174354C (en) 1989-06-06 1990-06-05 Process of bleaching chemically delignified lignocellulosic pulp
BR909002660A BR9002660A (en) 1989-06-06 1990-06-05 PULLE MOLDING PROCESS CONTAINING LIGNOCELLULOSIS
PT94287A PT94287B (en) 1989-06-06 1990-06-06 PROCESS FOR BRANCHING PASTES CONTAINING LIGNOCELLULOSE
JP2146411A JP2843892B2 (en) 1989-06-06 1990-06-06 Method for bleaching pulp containing lignocellulose
US07/813,058 US5310458A (en) 1989-06-06 1991-12-23 Process for bleaching lignocellulose-containing pulps
LVP-92-600A LV10517B (en) 1989-06-06 1992-12-30 Process for bleaching lignocellulose-containing pulps
LTIP444A LT3269B (en) 1989-06-06 1993-03-19 Process for bleaching of lignocellulose-containing pulps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8902058A SE467006B (en) 1989-06-06 1989-06-06 Bleaching chemical pulp with peroxide, with the pulp first being treated with a sequestering agent

Publications (3)

Publication Number Publication Date
SE8902058D0 true SE8902058D0 (en) 1989-06-06
SE8902058L SE8902058L (en) 1990-12-07
SE467006B SE467006B (en) 1992-05-11

Family

ID=20376204

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8902058A SE467006B (en) 1989-06-06 1989-06-06 Bleaching chemical pulp with peroxide, with the pulp first being treated with a sequestering agent

Country Status (3)

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

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 (en) 1978-02-17 1981-10-05 Mo Och Domsjoe Ab PROCEDURE FOR WHEATING AND EXTRACTION OF LIGNOCELLULOSALLY MATERIALS WITH PEROXID CONTAINING BLACKS
SU903429A1 (en) 1980-06-05 1982-02-07 Центральный научно-исследовательский институт бумаги Paper pulp bleaching method
FR2613388B1 (en) 1987-04-02 1990-05-04 Atochem PROCESS FOR BLEACHING PASTA

Also Published As

Publication number Publication date
LTIP444A (en) 1994-11-25
SE467006B (en) 1992-05-11
LT3269B (en) 1995-05-25
SE8902058L (en) 1990-12-07
RU2026437C1 (en) 1995-01-09

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