IN174833B - - Google Patents

Info

Publication number
IN174833B
IN174833B IN85CA1991DA IN174833B IN 174833 B IN174833 B IN 174833B IN 85CA1991D A IN85CA1991D A IN 85CA1991DA IN 174833 B IN174833 B IN 174833B
Authority
IN
India
Prior art keywords
stage
eop
bleach
stages
exit air
Prior art date
Application number
Other languages
English (en)
Inventor
Anton Hruschka
Peter Walter
Oskar Hoglinger
Original Assignee
Chemiefaser Lenzing Ag
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 Chemiefaser Lenzing Ag filed Critical Chemiefaser Lenzing Ag
Publication of IN174833B publication Critical patent/IN174833B/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
    • D21C9/1057—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
    • D21C9/147—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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Landscapes

  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Artificial Filaments (AREA)
  • Detergent Compositions (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Jellies, Jams, And Syrups (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Processing Of Solid Wastes (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
IN85CA1991D 1990-02-07 1991-01-28 IN174833B (sh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0026190A AT395028B (de) 1990-02-07 1990-02-07 Verfahren zum chlorfreien bleichen von kunstfaserzellstoff

Publications (1)

Publication Number Publication Date
IN174833B true IN174833B (sh) 1995-03-18

Family

ID=3485841

Family Applications (1)

Application Number Title Priority Date Filing Date
IN85CA1991D IN174833B (sh) 1990-02-07 1991-01-28

Country Status (22)

Country Link
US (1) US5145557A (sh)
EP (1) EP0441113B1 (sh)
JP (1) JPH04300380A (sh)
AT (2) AT395028B (sh)
BR (1) BR9100516A (sh)
CA (1) CA2035698C (sh)
CZ (1) CZ280077B6 (sh)
DE (1) DE59007341D1 (sh)
DK (1) DK0441113T3 (sh)
ES (1) ES2061008T3 (sh)
FI (1) FI98077C (sh)
HR (1) HRP930456A2 (sh)
IN (1) IN174833B (sh)
LT (1) LT3392B (sh)
LV (1) LV10514B (sh)
NO (1) NO178079C (sh)
PL (1) PL169421B1 (sh)
RU (1) RU2040616C1 (sh)
SI (1) SI9110206B (sh)
SK (1) SK278326B6 (sh)
YU (1) YU47388B (sh)
ZA (1) ZA91840B (sh)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2053035C (en) * 1990-10-12 1997-09-30 Repap Enterprises Inc. Chlorine-free wood pulps and process of making
US5211809A (en) * 1991-05-21 1993-05-18 Air Products And Chemicals, Inc,. Dye removal in oxygen color stripping of secondary fibers
BE1006056A3 (fr) * 1992-07-06 1994-05-03 Solvay Interox Procede pour le blanchiment d'une pate a papier chimique.
SE500113C2 (sv) * 1992-07-09 1994-04-18 Kamyr Ab Sätt vid blekning av massa för omhändertagande av utlösta metaller
US5374333A (en) * 1992-07-30 1994-12-20 Kamyr, Inc. Method for minimizing pulp mill effluents
FR2695947B1 (fr) * 1992-09-18 1994-10-21 Saint Gobain Papier Bois Gie C Procédé de blanchiment de pâtes cellulosiques chimiques.
CA2147244A1 (en) * 1992-10-23 1994-05-11 Marco Solinas Improved ozone bleaching
SE500335C2 (sv) * 1992-10-26 1994-06-06 Sca Wifsta Oestrand Ab Blekning av sulfatmassa med peroxid-ozon-peroxid
US6210527B1 (en) 1994-03-14 2001-04-03 The Boc Group, Inc. Pulp bleaching method wherein an ozone bleaching waste stream is scrubbed to form an oxygen containing stream
SE504424C2 (sv) * 1994-11-04 1997-02-10 Kvaerner Pulping Tech Sätt att fälla ut övergångsmetaller och alkaliska jordartsmetaller ur blekeriavlutar genom att tillsätta alkalisk vätska
SE516030C2 (sv) * 1994-11-14 2001-11-12 Aga Ab Regenerering av en gasblandning från ett ozonbleksteg
US5656130A (en) * 1995-04-28 1997-08-12 Union Camp Holding, Inc. Ambient temperature pulp bleaching with peroxyacid salts
WO1997020983A1 (en) * 1995-12-07 1997-06-12 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry
AT402827B (de) * 1995-12-22 1997-09-25 Chemiefaser Lenzing Ag Celluloseformkörper und verfahren zu seiner herstellung
EP1728918A3 (de) * 2005-05-12 2006-12-13 Voith Patent GmbH Verfahren zur Entfernung von Störstoffen aus einer wässrigen Papierfasersuspension
US9339058B2 (en) 2012-04-19 2016-05-17 R. J. Reynolds Tobacco Company Method for producing microcrystalline cellulose from tobacco and related tobacco product
SE538064C2 (sv) * 2014-06-17 2016-02-23 Valmet Oy Metod för att producera dissolving massa från lignocellulosahaltiga material
FI127444B (en) 2015-05-27 2018-06-15 Kemira Oyj A method for reducing the viscosity of a pulp in the manufacture of soluble cellulose

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196043A (en) * 1970-12-21 1980-04-01 Scott Paper Company Kraft pulp bleaching and recovery process
CA966604A (en) * 1970-12-21 1975-04-29 Scott Paper Company Kraft pulp bleaching and recovery process
JPS5430902A (en) 1977-06-27 1979-03-07 Seisan Kaihatsu Kagaku Kenkyus Industrial multistage pulp bleaching method
US4216054A (en) * 1977-09-26 1980-08-05 Weyerhaeuser Company Low-consistency ozone delignification
US4372812A (en) * 1978-04-07 1983-02-08 International Paper Company Chlorine free process for bleaching lignocellulosic pulp
US4283251A (en) * 1980-01-24 1981-08-11 Scott Paper Company Ozone effluent bleaching
US4619733A (en) * 1983-11-30 1986-10-28 Kooi Boon Lam Pollution free pulping process using recycled wash effluent from multiple bleach stages to remove black liquor and recovering sodium hydroxide from the black liquor
AT384837B (de) * 1985-06-27 1988-01-11 Steyrermuehl Papier Verfahren und anordnung zur delignifizierung von zellstoff mit sauerstoff

Also Published As

Publication number Publication date
DE59007341D1 (de) 1994-11-03
LV10514A (lv) 1995-02-20
ES2061008T3 (es) 1994-12-01
AT395028B (de) 1992-08-25
FI910601A (fi) 1991-08-08
HRP930456A2 (en) 1995-12-31
ATA26190A (de) 1992-01-15
SK278326B6 (en) 1996-11-06
CS9100280A2 (en) 1991-09-15
FI98077B (fi) 1996-12-31
FI910601A0 (fi) 1991-02-07
NO910455D0 (no) 1991-02-06
YU47388B (sh) 1995-01-31
LT3392B (en) 1995-08-25
NO910455L (no) 1991-08-08
FI98077C (fi) 1997-04-10
DK0441113T3 (da) 1994-10-24
US5145557A (en) 1992-09-08
EP0441113A1 (de) 1991-08-14
YU20691A (sh) 1994-05-10
PL169421B1 (pl) 1996-07-31
ZA91840B (en) 1992-01-29
BR9100516A (pt) 1991-10-29
CZ280077B6 (cs) 1995-10-18
ATE112338T1 (de) 1994-10-15
PL288978A1 (en) 1992-01-13
CA2035698C (en) 2003-03-25
LV10514B (en) 1995-10-20
NO178079C (no) 1996-01-17
JPH04300380A (ja) 1992-10-23
SI9110206A (sl) 1998-02-28
LTIP753A (en) 1995-01-31
RU2040616C1 (ru) 1995-07-25
SI9110206B (sl) 2000-04-30
CA2035698A1 (en) 1991-08-08
NO178079B (no) 1995-10-09
EP0441113B1 (de) 1994-09-28

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