SE9401771D0 - Process for removal of metal compounds in lignocellulosic pulp - Google Patents

Process for removal of metal compounds in lignocellulosic pulp

Info

Publication number
SE9401771D0
SE9401771D0 SE9401771A SE9401771A SE9401771D0 SE 9401771 D0 SE9401771 D0 SE 9401771D0 SE 9401771 A SE9401771 A SE 9401771A SE 9401771 A SE9401771 A SE 9401771A SE 9401771 D0 SE9401771 D0 SE 9401771D0
Authority
SE
Sweden
Prior art keywords
pct
metal compounds
pulp
during
oxygen bleaching
Prior art date
Application number
SE9401771A
Other languages
English (en)
Inventor
Hans Olof Samuelson
Original Assignee
Hans Olof Samuelson
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 Hans Olof Samuelson filed Critical Hans Olof Samuelson
Priority to SE9401771A priority Critical patent/SE9401771D0/sv
Publication of SE9401771D0 publication Critical patent/SE9401771D0/sv
Priority to PT95920325T priority patent/PT763156E/pt
Priority to AT95920325T priority patent/ATE205899T1/de
Priority to CA002191081A priority patent/CA2191081C/en
Priority to US08/737,221 priority patent/US5985097A/en
Priority to DE69522802T priority patent/DE69522802T2/de
Priority to EP95920325A priority patent/EP0763156B1/en
Priority to PCT/SE1995/000433 priority patent/WO1995032332A1/en
Priority to BR9507751A priority patent/BR9507751A/pt
Priority to ES95920325T priority patent/ES2161891T3/es
Priority to JP7530226A priority patent/JPH10503810A/ja
Priority to FI964632A priority patent/FI964632A/sv
Priority to NO964968A priority patent/NO964968D0/no

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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Compounds Of Unknown Constitution (AREA)
SE9401771A 1994-05-24 1994-05-24 Process for removal of metal compounds in lignocellulosic pulp SE9401771D0 (sv)

Priority Applications (13)

Application Number Priority Date Filing Date Title
SE9401771A SE9401771D0 (sv) 1994-05-24 1994-05-24 Process for removal of metal compounds in lignocellulosic pulp
JP7530226A JPH10503810A (ja) 1994-05-24 1995-04-21 リグノセルロースパルプ中の金属化合物の除去方法
US08/737,221 US5985097A (en) 1994-05-24 1995-04-21 Method for suppressing undesired effects of transition and alkaline metal compounds during bleaching
AT95920325T ATE205899T1 (de) 1994-05-24 1995-04-21 Verfahren zur entfernung von metallverbindungen im lignocellulosischen zellstoff
CA002191081A CA2191081C (en) 1994-05-24 1995-04-21 Process for removal of metal compounds in lignocellulosic pulp
PT95920325T PT763156E (pt) 1994-05-24 1995-04-21 Processo para remocao de compostos metalicos em pasta lenhocelulosica
DE69522802T DE69522802T2 (de) 1994-05-24 1995-04-21 Verfahren zur entfernung von metallverbindungen im lignocellulosischen zellstoff
EP95920325A EP0763156B1 (en) 1994-05-24 1995-04-21 Process for removal of metal compounds in lignocellulosic pulp
PCT/SE1995/000433 WO1995032332A1 (en) 1994-05-24 1995-04-21 Process for removal of metal compounds in lignocellulosic pulp
BR9507751A BR9507751A (pt) 1994-05-24 1995-04-21 Processo para a remoção de compostos de metal em polpa lignocelulósica
ES95920325T ES2161891T3 (es) 1994-05-24 1995-04-21 Procedimiento para eliminar compuestos metalicos de la pulpa lignocelulosica.
FI964632A FI964632A (sv) 1994-05-24 1996-11-20 Förfarande för avlägsnande av metallsammansättningar ur lignocellulosamäld
NO964968A NO964968D0 (no) 1994-05-24 1996-11-22 Fremgangsmåte ved fjerning av metallforbindelser i lignocelluloseholdig masse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9401771A SE9401771D0 (sv) 1994-05-24 1994-05-24 Process for removal of metal compounds in lignocellulosic pulp

Publications (1)

Publication Number Publication Date
SE9401771D0 true SE9401771D0 (sv) 1994-05-24

Family

ID=20394098

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9401771A SE9401771D0 (sv) 1994-05-24 1994-05-24 Process for removal of metal compounds in lignocellulosic pulp

Country Status (13)

Country Link
US (1) US5985097A (sv)
EP (1) EP0763156B1 (sv)
JP (1) JPH10503810A (sv)
AT (1) ATE205899T1 (sv)
BR (1) BR9507751A (sv)
CA (1) CA2191081C (sv)
DE (1) DE69522802T2 (sv)
ES (1) ES2161891T3 (sv)
FI (1) FI964632A (sv)
NO (1) NO964968D0 (sv)
PT (1) PT763156E (sv)
SE (1) SE9401771D0 (sv)
WO (1) WO1995032332A1 (sv)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6331354B1 (en) * 1996-08-23 2001-12-18 Weyerhaeuser Company Alkaline pulp having low average degree of polymerization values and method of producing the same
US6605350B1 (en) * 1996-08-23 2003-08-12 Weyerhaeuser Company Sawdust alkaline pulp having low average degree of polymerization values and method of producing the same
US6833187B2 (en) * 2003-04-16 2004-12-21 Weyerhaeuser Company Unbleached pulp for lyocell products
US6790527B1 (en) 2003-04-16 2004-09-14 Weyerhaeuser Company Lyocell fiber from unbleached pulp
US7097737B2 (en) * 2003-04-16 2006-08-29 Weyerhaeuser Company Method of making a modified unbleached pulp for lyocell products
US20040207110A1 (en) * 2003-04-16 2004-10-21 Mengkui Luo Shaped article from unbleached pulp and the process
US20060065377A1 (en) * 2004-09-30 2006-03-30 Mengkui Luo High PH treatment of pulp in a bleach sequence to produce pulp having low D.P. and low copper number for use in lyocell manufacture
US20060070711A1 (en) * 2004-09-30 2006-04-06 Mengkui Luo Low pH treatment of pulp in a bleach sequence to produce pulp having low D.P. and low copper number for use in lyocell manufacture
US20090090478A1 (en) * 2007-10-05 2009-04-09 Hollomon Martha G Selectivity improvement in oxygen delignification and bleaching of lignocellulose pulp using singlet oxygen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE360128C (sv) * 1970-08-25 1983-10-31 Mo Och Domsjoe Ab Sett att bleka cellulosamassa med en syreinnehallande gas i nervaro av alkali
US4087318A (en) * 1974-03-14 1978-05-02 Mo Och Domsjo Aktiebolag Oxygen-alkali delignification of lignocellulosic material in the presence of a manganese compound
FI58360C (fi) * 1974-06-14 1981-01-12 Mo Och Domsjoe Ab Foerfarande foer delignifiering av lignocellulosahaltigt material med hjaelp av syreinnehaollande gas och apparatur foer utfoerande av detta foerfarande
EP0579744A4 (en) * 1991-04-08 1995-11-15 Int Paper Co Method for reducing colored matter from bleach effluent using a dzd bleach sequence
WO1994010375A1 (en) * 1992-10-26 1994-05-11 Kamyr, Inc. Displacement chelate treatment of pulp

Also Published As

Publication number Publication date
US5985097A (en) 1999-11-16
FI964632A0 (sv) 1996-11-20
FI964632A (sv) 1997-01-14
DE69522802D1 (de) 2001-10-25
NO964968L (no) 1996-11-22
ES2161891T3 (es) 2001-12-16
NO964968D0 (no) 1996-11-22
PT763156E (pt) 2002-02-28
JPH10503810A (ja) 1998-04-07
EP0763156B1 (en) 2001-09-19
ATE205899T1 (de) 2001-10-15
EP0763156A1 (en) 1997-03-19
CA2191081C (en) 2001-07-03
CA2191081A1 (en) 1995-11-30
WO1995032332A1 (en) 1995-11-30
BR9507751A (pt) 1997-08-19
DE69522802T2 (de) 2002-04-11

Similar Documents

Publication Publication Date Title
IN189584B (sv)
SE9401771D0 (sv) Process for removal of metal compounds in lignocellulosic pulp
NZ237866A (en) Process for delignifying and bleaching cellulose pulp wherein there is a reduced formation and discharge of halogenated organic compounds in the waste liquor; pulp treated with a trace metal complexing agent and then with a peroxide agent
FI950526A (sv) Förfarande i samband med massablekning
NZ298222A (en) Bleaching filled paper with hydrogen peroxide, sodium borohydride, and/or sodium hydrosulphite
AU1286795A (en) Method for the manufacture of bleached cellulose pulp
SE9700992L (sv) Förfarande för blekning av kraftmassa
JP5232164B2 (ja) 高温での最終オゾン処理によって化学紙パルプを漂白する方法
AU1406788A (en) Pulp bleaching process
SE0004438D0 (sv) Enviormentally-friendly fiberline for producing bleached chemical pulp
DE69111098D1 (de) Verfahren zur Herstellung von gebleichtem Zellstoff mit hoher Ausbeute.
EP0778909B1 (en) Pulp bleaching
MX9602927A (es) Procedimiento para blanquear pasta pulpa kraft.
AU565124B2 (en) Hypochlorite treatment of chemical paper pulps
CA2275710C (en) Treatment of bleach plant filtrates with oxygen
NZ239501A (en) Treatment of unbleached wood pulp by adding a xylanase to it before the last washing, apparatus therefor
SE9600773D0 (sv) Medium consistency ozone brightening of high consistency ozone bleached pulp
SE0101828D0 (sv) Method and apparatus for treating pulp
CA2121969A1 (en) Pre-Treatment of Sulfite Pulp Before Bleaching with Oxygen Containing Chemicals
SE9500573D0 (sv) Bleaching pulp with peroxide at superatmospheric pressure and in multiple stages
FI953074A (sv) Förfarande och anordning för behandling av massa