PT97537A - Processo de branqueamento de pasta quimica em pelo menos quatro passos - Google Patents

Processo de branqueamento de pasta quimica em pelo menos quatro passos

Info

Publication number
PT97537A
PT97537A PT97537A PT9753791A PT97537A PT 97537 A PT97537 A PT 97537A PT 97537 A PT97537 A PT 97537A PT 9753791 A PT9753791 A PT 9753791A PT 97537 A PT97537 A PT 97537A
Authority
PT
Portugal
Prior art keywords
pct
steps
chlorine dioxide
bleaching
sec
Prior art date
Application number
PT97537A
Other languages
English (en)
Other versions
PT97537B (pt
Inventor
Per-Ake Farnstrand
Lars T Sjodin
Lars-Ake Lindstrom
K Solveig E Norden
Original Assignee
Sunds Defibrator Ind 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 Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Publication of PT97537A publication Critical patent/PT97537A/pt
Publication of PT97537B publication Critical patent/PT97537B/pt

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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • 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
    • 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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Lubricants (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Saccharide Compounds (AREA)
  • Coloring Foods And Improving Nutritive Qualities (AREA)
PT97537A 1990-04-30 1991-04-30 Processo de branqueamento de pasta quimica em pelo menos quatro passos PT97537B (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9001548A SE466062B (sv) 1990-04-30 1990-04-30 Blekning av kemisk massa

Publications (2)

Publication Number Publication Date
PT97537A true PT97537A (pt) 1992-01-31
PT97537B PT97537B (pt) 1998-08-31

Family

ID=20379338

Family Applications (1)

Application Number Title Priority Date Filing Date
PT97537A PT97537B (pt) 1990-04-30 1991-04-30 Processo de branqueamento de pasta quimica em pelo menos quatro passos

Country Status (16)

Country Link
US (1) US5589031A (pt)
EP (1) EP0527808B1 (pt)
JP (1) JPH05506698A (pt)
AT (1) ATE106962T1 (pt)
AU (1) AU639335B2 (pt)
BR (1) BR9106390A (pt)
CA (1) CA2080242A1 (pt)
DE (1) DE69102430T2 (pt)
ES (1) ES2055602T3 (pt)
FI (1) FI106215B (pt)
NO (1) NO179417C (pt)
NZ (1) NZ237528A (pt)
PT (1) PT97537B (pt)
SE (1) SE466062B (pt)
WO (1) WO1991017306A1 (pt)
ZA (1) ZA912504B (pt)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6322768B1 (en) 1998-09-29 2001-11-27 International Paper Company Recovery of chlorine dioxide from gas streams
SE518692C2 (sv) * 2001-03-20 2002-11-05 Metso Paper Inc Blekning av massa med klordioxid
SE532370C2 (sv) * 2008-02-28 2009-12-29 Metso Paper Inc Metod för blekning av en massa

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2432574A1 (fr) * 1978-08-01 1980-02-29 Europeen Cellulose Procede de blanchiment de pate a papier
SE462919B (sv) * 1979-05-11 1990-09-17 Sunds Defibrator Ind Ab Saett att genomfoera alkaliextraktion av cellulosamassa i naervaro av syre
US4568420B1 (en) * 1984-12-03 1999-03-02 Int Paper Co Multi-stage bleaching process including an enhanced oxidative extraction stage
US4657633A (en) * 1985-05-24 1987-04-14 Westvaco Corporation Delignification and bleaching of a cellulose pulp with an alkalioxygen-hypochlorite single stage sequential extraction

Also Published As

Publication number Publication date
EP0527808B1 (en) 1994-06-08
DE69102430T2 (de) 1994-09-29
ZA912504B (en) 1992-01-29
ES2055602T3 (es) 1994-08-16
ATE106962T1 (de) 1994-06-15
FI924889A (fi) 1992-10-28
US5589031A (en) 1996-12-31
SE466062B (sv) 1991-12-09
EP0527808A1 (en) 1993-02-24
NZ237528A (en) 1993-06-25
NO179417C (no) 1996-10-02
NO179417B (no) 1996-06-24
DE69102430D1 (de) 1994-07-14
NO924182L (no) 1992-10-29
FI106215B (fi) 2000-12-15
JPH05506698A (ja) 1993-09-30
WO1991017306A1 (en) 1991-11-14
AU639335B2 (en) 1993-07-22
PT97537B (pt) 1998-08-31
AU7742791A (en) 1991-11-27
SE9001548D0 (sv) 1990-04-30
FI924889A0 (fi) 1992-10-28
NO924182D0 (no) 1992-10-29
BR9106390A (pt) 1993-04-27
CA2080242A1 (en) 1991-10-31
SE9001548L (sv) 1991-10-31

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Legal Events

Date Code Title Description
BB1A Laying open of patent application

Effective date: 19910918

FG3A Patent granted, date of granting

Effective date: 19980518

MM3A Annulment or lapse

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 19991130