ES2161891T3 - Procedimiento para eliminar compuestos metalicos de la pulpa lignocelulosica. - Google Patents

Procedimiento para eliminar compuestos metalicos de la pulpa lignocelulosica.

Info

Publication number
ES2161891T3
ES2161891T3 ES95920325T ES95920325T ES2161891T3 ES 2161891 T3 ES2161891 T3 ES 2161891T3 ES 95920325 T ES95920325 T ES 95920325T ES 95920325 T ES95920325 T ES 95920325T ES 2161891 T3 ES2161891 T3 ES 2161891T3
Authority
ES
Spain
Prior art keywords
metal compounds
pct
pulp
during
oxygen bleaching
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
ES95920325T
Other languages
English (en)
Inventor
Hans Olov Samuelsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of ES2161891T3 publication Critical patent/ES2161891T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)

Abstract

LA INVENCION RESUELVE EL PROBLEMA DE LA SUPRESION DE LOS EFECTOS PERTURBADORES DE COMPUESTOS DE METALES DE TRANSICION Y DE TIERRA ALCALINA DURANTE EL BLANQUEADO DE PULPA LIGNOCELULOSICA QUIMICAMENTE DIGERIDA EN SECUENCIA CON EL BLANQUEADO POR OXIGENO ANTES DE LAS ETAPAS OXIDATIVAS CON LA INTRODUCCION DE POR EJEMPLO OZONO, SUPEROXIDOS, PEROXIDO DE HIDROGENO Y ACIDOS DE PEROXIDO. LAS CONDICIONES DURANTE EL BLANQUEADO POR OXIGENO SE ESCOGEN DE FORMA QUE LAS PROPIEDADES DE ESTOS COMPUESTOS DE METAL CAMBIEN Y LOS COMPUESTOS SEAN SEPARADOS DE LA PULPA DURANTE EL BLANQUEADO POR OXIGENO BAJO TALES CONDICIONES QUE EL ATAQUE SOBRE LA CELULOSA SEA PEQUEÑO Y LAS FLUCTUACIONES DE LA CALIDAD DE LA PULPA DEBIDAS A LAS CANTIDADES FLUCTUANTES DE ESTOS COMPUESTOS DE METAL DESCIENDAN DE FORMA REMARCADA.
ES95920325T 1994-05-24 1995-04-21 Procedimiento para eliminar compuestos metalicos de la pulpa lignocelulosica. Expired - Lifetime ES2161891T3 (es)

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
ES2161891T3 true ES2161891T3 (es) 2001-12-16

Family

ID=20394098

Family Applications (1)

Application Number Title Priority Date Filing Date
ES95920325T Expired - Lifetime ES2161891T3 (es) 1994-05-24 1995-04-21 Procedimiento para eliminar compuestos metalicos de la pulpa lignocelulosica.

Country Status (13)

Country Link
US (1) US5985097A (es)
EP (1) EP0763156B1 (es)
JP (1) JPH10503810A (es)
AT (1) ATE205899T1 (es)
BR (1) BR9507751A (es)
CA (1) CA2191081C (es)
DE (1) DE69522802T2 (es)
ES (1) ES2161891T3 (es)
FI (1) FI964632A (es)
NO (1) NO964968L (es)
PT (1) PT763156E (es)
SE (1) SE9401771D0 (es)
WO (1) WO1995032332A1 (es)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
US6790527B1 (en) 2003-04-16 2004-09-14 Weyerhaeuser Company Lyocell fiber from unbleached pulp
US20040207110A1 (en) * 2003-04-16 2004-10-21 Mengkui Luo Shaped article from unbleached pulp and the process
US7097737B2 (en) * 2003-04-16 2006-08-29 Weyerhaeuser Company Method of making a modified unbleached pulp for lyocell products
US6833187B2 (en) * 2003-04-16 2004-12-21 Weyerhaeuser Company Unbleached pulp for lyocell products
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 1983-08-02 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
GB1505529A (en) * 1974-06-14 1978-03-30 Mo Och Domsjoe Ab Method for the oxygen-gas delignification of lignocellulosic material and apparatus for carrying out the method
WO1992017639A1 (en) * 1991-04-08 1992-10-15 International Paper Company 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
NO964968D0 (no) 1996-11-22
FI964632A0 (fi) 1996-11-20
CA2191081A1 (en) 1995-11-30
WO1995032332A1 (en) 1995-11-30
DE69522802D1 (de) 2001-10-25
US5985097A (en) 1999-11-16
EP0763156B1 (en) 2001-09-19
BR9507751A (pt) 1997-08-19
SE9401771D0 (sv) 1994-05-24
DE69522802T2 (de) 2002-04-11
PT763156E (pt) 2002-02-28
NO964968L (no) 1996-11-22
CA2191081C (en) 2001-07-03
ATE205899T1 (de) 2001-10-15
FI964632A (fi) 1997-01-14
JPH10503810A (ja) 1998-04-07
EP0763156A1 (en) 1997-03-19

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