BR9803217A - Elemental chlorine-free bleaching process to target lignocellulosic materials - Google Patents

Elemental chlorine-free bleaching process to target lignocellulosic materials

Info

Publication number
BR9803217A
BR9803217A BR9803217-8A BR9803217A BR9803217A BR 9803217 A BR9803217 A BR 9803217A BR 9803217 A BR9803217 A BR 9803217A BR 9803217 A BR9803217 A BR 9803217A
Authority
BR
Brazil
Prior art keywords
lignocellulosic materials
bleaching
elemental chlorine
bleaching process
free bleaching
Prior art date
Application number
BR9803217-8A
Other languages
Portuguese (pt)
Inventor
Jorge Luiz Colodette
Ana Campos H De Brito
Marcelo Rodrigues Da Silva
Elias Salvador
Original Assignee
Praxair Technology Inc
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 Praxair Technology Inc filed Critical Praxair Technology Inc
Publication of BR9803217A publication Critical patent/BR9803217A/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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/24—Continuous processes
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes
    • D21C3/263—Multistage processes at least one stage being in presence of oxygen
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

"PROCESSO DE ALVEJAMENTO LIVRE DE CLORO ELEMENTAR PARA ALVEJAR MATERIAIS LIGNOCELULóSICOS". Um processo de alvejamento livre de cloro elementar (ECF) para alvejar materiais lignocelulósicos compreendendo uma seq³ência de alvejamento de pelo menos três estágios seq³encias, incluindo os citados estágios um estágio de tratamento oxidante, um estágio de extração alcalina, e um estágio de tratamento de alvejamento acidificante usando ozónio."ELEMENTARY CHLORINE-FREE TARGETING PROCESS TO TARGET LIGNOCELLULOSIC MATERIALS". An elemental chlorine-free bleaching process (ECF) for bleaching lignocellulosic materials comprising a bleaching sequence of at least three sequential stages, including the aforementioned oxidizing treatment stage, an alkaline extraction stage, and a bleaching treatment stage. acidifying using ozone.

BR9803217-8A 1997-08-25 1998-08-24 Elemental chlorine-free bleaching process to target lignocellulosic materials BR9803217A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US91723597A 1997-08-25 1997-08-25

Publications (1)

Publication Number Publication Date
BR9803217A true BR9803217A (en) 1999-11-03

Family

ID=25438514

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9803217-8A BR9803217A (en) 1997-08-25 1998-08-24 Elemental chlorine-free bleaching process to target lignocellulosic materials

Country Status (6)

Country Link
EP (1) EP0905307A1 (en)
KR (1) KR19990023814A (en)
CN (1) CN1209480A (en)
BR (1) BR9803217A (en)
CA (1) CA2245535A1 (en)
ID (1) ID23571A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102995478B (en) * 2011-09-09 2015-04-15 吉林化纤集团有限责任公司 Bleaching method for preparing high quality low pollution bamboo wood dissolving slurry
CN111979822A (en) * 2020-08-07 2020-11-24 齐鲁工业大学 Sequential bleaching process suitable for element-free chlorine (ECF) short-procedure bleaching

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4959124A (en) * 1989-05-05 1990-09-25 International Paper Company Method of bleaching kraft pulp in a DZED sequence
SE467260B (en) * 1989-12-29 1992-06-22 Kamyr Ab WHITING CELLULOSAMASSA WITH CHLORIDE Dioxide AND OZONE IN ONE AND SAME STEP
EP0483163B1 (en) * 1990-05-17 1995-05-10 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials
SE470065C (en) * 1991-04-30 1996-01-15 Eka Nobel Ab Treatment of chemical pulp with an acid and then a magnesium and calcium compound in chlorine-free bleaching

Also Published As

Publication number Publication date
ID23571A (en) 2000-05-04
EP0905307A1 (en) 1999-03-31
CA2245535A1 (en) 1999-02-25
CN1209480A (en) 1999-03-03
KR19990023814A (en) 1999-03-25

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Legal Events

Date Code Title Description
B08F Application fees: application dismissed [chapter 8.6 patent gazette]

Free format text: REFERENTE A 6A,7A E 8A ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1876 DE 19/12/2006.