AR055267A1 - Tratamiento de alto ph de pulpa en una secuencia de blanqueo para producir pulpa que tiene un bajo g.p. y un bajo numero de cobre para utilizar en la manufactura de lyocell - Google Patents

Tratamiento de alto ph de pulpa en una secuencia de blanqueo para producir pulpa que tiene un bajo g.p. y un bajo numero de cobre para utilizar en la manufactura de lyocell

Info

Publication number
AR055267A1
AR055267A1 ARP050104108A ARP050104108A AR055267A1 AR 055267 A1 AR055267 A1 AR 055267A1 AR P050104108 A ARP050104108 A AR P050104108A AR P050104108 A ARP050104108 A AR P050104108A AR 055267 A1 AR055267 A1 AR 055267A1
Authority
AR
Argentina
Prior art keywords
pulp
low
lyocell
manufacture
treatment
Prior art date
Application number
ARP050104108A
Other languages
English (en)
Inventor
Mengkui Luo
Original Assignee
Weyerhaeuser Co
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 Weyerhaeuser Co filed Critical Weyerhaeuser Co
Publication of AR055267A1 publication Critical patent/AR055267A1/es

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • C08L1/06—Cellulose hydrate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B16/00—Regeneration of cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • 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
    • 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
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Paper (AREA)

Abstract

Un proceso de pH alto y de pH bajo, para reducir el grado de polimerizacion de una pulpa que tiene un contenido de hemicelulosa de por lo menos 7%. El pH alto es superior a 8, y el pH bajo es de 2 a 8. El proceso de pH alto reduce el grado de polimerizacion sin incrementar de manera sustancial el numero de cobre. El proceso de pH bajo requiere un tratamiento subsiguiente con álcali para reducir el numero de cobre de la pulpa a menos de 2. El proceso puede llevarse a la práctica en plantas de pulpa con una secuencia de blanqueo que tiene una o más etapas E o D. Al final de la secuencia de blanqueo, se provee una pulpa que tiene un grado de polimerizacion de 200 a 1.100, un numero de cobre inferior a 2, y un contenido de hemicelulosa de por lo menos 7%. La pulpa puede utilizarse para hacer fibras de Lyocell.
ARP050104108A 2004-09-30 2005-09-29 Tratamiento de alto ph de pulpa en una secuencia de blanqueo para producir pulpa que tiene un bajo g.p. y un bajo numero de cobre para utilizar en la manufactura de lyocell AR055267A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/956,914 US20060065377A1 (en) 2004-09-30 2004-09-30 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

Publications (1)

Publication Number Publication Date
AR055267A1 true AR055267A1 (es) 2007-08-15

Family

ID=35307870

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP050104108A AR055267A1 (es) 2004-09-30 2005-09-29 Tratamiento de alto ph de pulpa en una secuencia de blanqueo para producir pulpa que tiene un bajo g.p. y un bajo numero de cobre para utilizar en la manufactura de lyocell

Country Status (9)

Country Link
US (1) US20060065377A1 (es)
EP (1) EP1643030B1 (es)
AR (1) AR055267A1 (es)
AT (1) ATE365829T1 (es)
BR (1) BRPI0503977A (es)
CA (1) CA2520226C (es)
DE (1) DE602005001484T2 (es)
NO (1) NO20054497L (es)
ZA (1) ZA200507856B (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9511167B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Modified cellulose from chemical kraft fiber and methods of making and using the same
US9512563B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Surface treated modified cellulose from chemical kraft fiber and methods of making and using same
CA2949518C (en) 2009-05-28 2019-01-08 Gp Cellulose Gmbh Modified cellulose from chemical kraft fiber and methods of making and using the same
US9512237B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Method for inhibiting the growth of microbes with a modified cellulose fiber
CN105143547B (zh) 2013-03-15 2018-05-01 Gp 纤维素股份有限公司 具有增高羧基含量的低粘度牛皮纸纤维及其制造和使用方法
CN108004820A (zh) * 2017-11-14 2018-05-08 潍坊友容实业有限公司 采用盐碱地栽植的紫穗槐制备浆粕的方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9401771D0 (sv) * 1994-05-24 1994-05-24 Hans Olof Samuelson Process for removal of metal compounds in lignocellulosic pulp
DE19620241A1 (de) * 1996-05-20 1997-11-27 Patt R Prof Dr Verfahren zum Delignifizieren von Zellstoffen und Verwendung eines Katalysators
US6210801B1 (en) * 1996-08-23 2001-04-03 Weyerhaeuser Company Lyocell fibers, and compositions for making same
US6235392B1 (en) * 1996-08-23 2001-05-22 Weyerhaeuser Company Lyocell fibers and process for their preparation
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
US6743332B2 (en) * 2001-05-16 2004-06-01 Weyerhaeuser Company High temperature peroxide bleaching of mechanical pulps
US6833187B2 (en) * 2003-04-16 2004-12-21 Weyerhaeuser Company Unbleached pulp for lyocell products

Also Published As

Publication number Publication date
NO20054497L (no) 2006-03-31
ATE365829T1 (de) 2007-07-15
CA2520226A1 (en) 2006-03-30
EP1643030B1 (en) 2007-06-27
DE602005001484D1 (de) 2007-08-09
EP1643030A1 (en) 2006-04-05
ZA200507856B (en) 2005-12-15
US20060065377A1 (en) 2006-03-30
BRPI0503977A (pt) 2006-05-09
DE602005001484T2 (de) 2008-03-20
CA2520226C (en) 2008-12-16
NO20054497D0 (no) 2005-09-28

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