SE9402726L - Chemical pulp bleaching sequence comprising a sulfonating bleaching step - Google Patents

Chemical pulp bleaching sequence comprising a sulfonating bleaching step

Info

Publication number
SE9402726L
SE9402726L SE9402726A SE9402726A SE9402726L SE 9402726 L SE9402726 L SE 9402726L SE 9402726 A SE9402726 A SE 9402726A SE 9402726 A SE9402726 A SE 9402726A SE 9402726 L SE9402726 L SE 9402726L
Authority
SE
Sweden
Prior art keywords
bleaching
sulfonating
sequence
chemical pulp
sulphite
Prior art date
Application number
SE9402726A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9402726D0 (en
SE502135C2 (en
Inventor
Petter Tibbling
Ulla Ekstroem
Erik Nilsson
Original Assignee
Kvaerner Pulping Tech
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 Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech
Priority to SE9402726A priority Critical patent/SE9402726L/en
Publication of SE9402726D0 publication Critical patent/SE9402726D0/en
Priority to AU27558/95A priority patent/AU2755895A/en
Priority to PCT/SE1995/000486 priority patent/WO1996005364A1/en
Priority to CA002194290A priority patent/CA2194290A1/en
Priority to ZA955971A priority patent/ZA955971B/en
Publication of SE502135C2 publication Critical patent/SE502135C2/en
Publication of SE9402726L publication Critical patent/SE9402726L/en
Priority to FI970519A priority patent/FI970519A0/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
    • D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
    • 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)

Abstract

Method of bleaching chemical paper pulp, preferably entirely without using chlorine, in a bleaching sequence which comprises at least one acidic, sulphite-containing, reducing bleaching stage and at least one alkaline, oxidizing bleaching stage in arbitrary order. At least one of the said acidic, sulphite-containing, reducing bleaching stages is carried out under conditions which are in the main sulphonating to a degree of sulphonation exceeding 10 %, preferably exceeding 20 %, and even more preferably to 40-80 %.
SE9402726A 1994-08-16 1994-08-16 Chemical pulp bleaching sequence comprising a sulfonating bleaching step SE9402726L (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SE9402726A SE9402726L (en) 1994-08-16 1994-08-16 Chemical pulp bleaching sequence comprising a sulfonating bleaching step
AU27558/95A AU2755895A (en) 1994-08-16 1995-05-04 Bleaching of chemical paper pulp under sulphonating conditions
PCT/SE1995/000486 WO1996005364A1 (en) 1994-08-16 1995-05-04 Bleaching of chemical paper pulp under sulphonating conditions
CA002194290A CA2194290A1 (en) 1994-08-16 1995-05-04 Bleaching of chemical paper pulp under sulphonating conditions
ZA955971A ZA955971B (en) 1994-08-16 1995-07-18 Method of bleaching pulp
FI970519A FI970519A0 (en) 1994-08-16 1997-02-07 Bleaching of chemical pulp under sulfonating conditions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9402726A SE9402726L (en) 1994-08-16 1994-08-16 Chemical pulp bleaching sequence comprising a sulfonating bleaching step

Publications (3)

Publication Number Publication Date
SE9402726D0 SE9402726D0 (en) 1994-08-16
SE502135C2 SE502135C2 (en) 1995-08-28
SE9402726L true SE9402726L (en) 1995-08-28

Family

ID=20394928

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9402726A SE9402726L (en) 1994-08-16 1994-08-16 Chemical pulp bleaching sequence comprising a sulfonating bleaching step

Country Status (6)

Country Link
AU (1) AU2755895A (en)
CA (1) CA2194290A1 (en)
FI (1) FI970519A0 (en)
SE (1) SE9402726L (en)
WO (1) WO1996005364A1 (en)
ZA (1) ZA955971B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI105701B (en) 1995-10-20 2000-09-29 Ahlstrom Machinery Oy Method and arrangement for treatment of pulp
SE516219C2 (en) * 1995-10-26 2001-12-03 Kvaerner Pulping Tech Bleaching of chemical paper pulp in a sulfonating step and an acid oxygen delignification step
CA2278188C (en) * 1997-01-21 2003-11-25 Guo Jun Kang Oxygen delignification process of pulp
US8980051B2 (en) * 2009-04-24 2015-03-17 International Paper Company Sulfonation of pulp produced by alkali pulping process

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO152907C (en) * 1983-06-29 1985-12-11 Peterson & Son As M PROCEDURE FOR DELIGNIFICATION OF CHEMICAL MASS.
US5089089A (en) * 1984-12-31 1992-02-18 Bear Island Paper Company System for sulfonating mechanical pulp fibers
FR2655668B1 (en) * 1989-12-11 1995-06-09 Du Pin Cellulose PROCESS FOR BLEACHING CHEMICAL CELLULOSIC PASTA.
BE1004630A3 (en) * 1990-10-17 1992-12-22 Interox Internat Sa Method for preservation of strength characteristics of paper pulp chemicals.

Also Published As

Publication number Publication date
CA2194290A1 (en) 1996-02-22
WO1996005364A1 (en) 1996-02-22
SE9402726D0 (en) 1994-08-16
AU2755895A (en) 1996-03-07
FI970519A (en) 1997-02-07
ZA955971B (en) 1996-02-21
SE502135C2 (en) 1995-08-28
FI970519A0 (en) 1997-02-07

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Legal Events

Date Code Title Description
NUG Patent has lapsed