BR9801454A - Processo contínuo de deslignificação e/ou branqueamento de pasta de papel química virgem ou reciclada - Google Patents
Processo contínuo de deslignificação e/ou branqueamento de pasta de papel química virgem ou recicladaInfo
- Publication number
- BR9801454A BR9801454A BR9801454-4A BR9801454A BR9801454A BR 9801454 A BR9801454 A BR 9801454A BR 9801454 A BR9801454 A BR 9801454A BR 9801454 A BR9801454 A BR 9801454A
- Authority
- BR
- Brazil
- Prior art keywords
- virgin
- continuous process
- delignification
- bleaching
- recycled
- Prior art date
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
- D21C9/1057—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
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
"PROCESSO CONTìNUO DE DESLIGNIFICAçãO E/OU BRANQUEAMENTO DE PASTA DE PAPEL QUìMICA VIRGEM OU RECICLADA". Processo contínuo de deslignificação e/ou branqueamento de pasta de papel química virgem ou reciclada, de acordo com o qual (a) prepara-se uma suspensão de pasta de papel, (b) submete-se a suspensão a um pré-tratamento por meio de oxigênio seguido por um tratamento por meio de um composto peroxidado, (c) recolhe-se uma suspensão de pasta de papel tratada, (d) separa-se pelo menos uma parte do líquido da suspensão recolhida, e (e) recicla-se pelo menos uma parte do líquido separado que se introduz na etapa (a) de preparação de uma suspensão de pasta de papel.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE9700383A BE1011129A4 (fr) | 1997-04-25 | 1997-04-25 | Procede continu de delignification et/ou de blanchiment de pate a papier chimique vierge ou recyclee. |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9801454A true BR9801454A (pt) | 1999-09-28 |
Family
ID=3890489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9801454-4A BR9801454A (pt) | 1997-04-25 | 1998-04-24 | Processo contínuo de deslignificação e/ou branqueamento de pasta de papel química virgem ou reciclada |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0874082A1 (pt) |
JP (1) | JPH10310988A (pt) |
BE (1) | BE1011129A4 (pt) |
BR (1) | BR9801454A (pt) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI45574C (fi) * | 1970-05-11 | 1972-07-10 | Kymin Oy Kymmene Ab | Menetelmä selluloosapitoisten aineiden valkaisemiseksi. |
FR2457339A1 (fr) * | 1979-05-25 | 1980-12-19 | Interox | Procede pour la delignification et le blanchiment de pates cellulosiques chimiques et semi-chimiques |
DE3428352A1 (de) * | 1984-08-01 | 1986-02-13 | Degussa Ag, 6000 Frankfurt | Verfahren zur delignifizierung und bleiche von zellstoffen |
US5011572A (en) * | 1989-05-19 | 1991-04-30 | Fmc Corporation | Two stage process for the oxygen delignification of lignocellulosic fibers with peroxide reinforcement in the first stage |
-
1997
- 1997-04-25 BE BE9700383A patent/BE1011129A4/fr not_active IP Right Cessation
-
1998
- 1998-04-14 EP EP98201186A patent/EP0874082A1/fr not_active Withdrawn
- 1998-04-24 BR BR9801454-4A patent/BR9801454A/pt not_active Application Discontinuation
- 1998-04-27 JP JP11688898A patent/JPH10310988A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPH10310988A (ja) | 1998-11-24 |
EP0874082A1 (fr) | 1998-10-28 |
BE1011129A4 (fr) | 1999-05-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FA10 | Dismissal: dismissal - article 33 of industrial property law |