WO2000065148A1 - Process for bleaching chemical pulps with low organic halogen compounds content - Google Patents
Process for bleaching chemical pulps with low organic halogen compounds content Download PDFInfo
- Publication number
- WO2000065148A1 WO2000065148A1 PCT/BR2000/000038 BR0000038W WO0065148A1 WO 2000065148 A1 WO2000065148 A1 WO 2000065148A1 BR 0000038 W BR0000038 W BR 0000038W WO 0065148 A1 WO0065148 A1 WO 0065148A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- halogen compounds
- organic halogen
- bleaching
- chlorine dioxide
- pulp
- 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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
- D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
-
- 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
- D21C9/1042—Use of chelating agents
-
- 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
- D21C9/147—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
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
Definitions
- the present invention refers to a process for bleaching low consistency chemical pulps comprising a step of adding chlorine dioxide in a pH in the range of about 4 5 to 5.5 as the first bleaching stage Brief Description of the Drawings
- Figure 3 illustrates the average concentration OX concentration in pulps treated in accordance with the present invention when compared to pulps treated by methods comprising different bleaching parameters
- the addition of CIO 2 in the first stage of the bleaching process carried out under the above mentioned conditions helps the removal of the organic charge, also contributing for the removal of lignin, as well as the increase of the H 2 O 2 reactivity in the Eop stage, whereby providing enhanced brightness when compared to pulps treated with the same amount of peroxide within conventional processes
- the pulps obtained by the process according to the present invention show brightness of about 90% ISO and all technical process parameters lead to low production costs and to a high recycling rates of effluents in the bleaching process
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2372069A CA2372069C (en) | 1999-04-27 | 2000-04-27 | Process for bleaching chemical pulps with low organic halogen compounds content |
ES00926590.1T ES2501141T3 (en) | 1999-04-27 | 2000-04-27 | Procedure for bleaching chemical pulps with low content of halogenated organic compounds |
EP00926590.1A EP1180172B1 (en) | 1999-04-27 | 2000-04-27 | Process for bleaching chemical pulps with low organic halogen compounds content |
NO20015241A NO331632B1 (en) | 1999-04-27 | 2001-10-26 | Chemical pulp bleaching process |
IS6132A IS6132A (en) | 1999-04-27 | 2001-10-26 | Method for bleaching low-OX resin bleaches |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI9901291-0 | 1999-04-27 | ||
BR9901291A BR9901291B1 (en) | 1999-04-27 | 1999-04-27 | process for bleaching low consistency chemical pulps. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000065148A1 true WO2000065148A1 (en) | 2000-11-02 |
Family
ID=4072226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BR2000/000038 WO2000065148A1 (en) | 1999-04-27 | 2000-04-27 | Process for bleaching chemical pulps with low organic halogen compounds content |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP1180172B1 (en) |
BR (1) | BR9901291B1 (en) |
CA (1) | CA2372069C (en) |
ES (1) | ES2501141T3 (en) |
IS (1) | IS6132A (en) |
NO (1) | NO331632B1 (en) |
PT (1) | PT1180172E (en) |
WO (1) | WO2000065148A1 (en) |
ZA (1) | ZA200108811B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002099186A1 (en) * | 2001-06-06 | 2002-12-12 | Kvaerner Pulping Ab | Reduction of organically bound chlorine formed in chlorine dioxide bleaching |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2093715A5 (en) * | 1970-05-25 | 1972-01-28 | Int Paper Co | |
SU1141128A1 (en) * | 1983-12-08 | 1985-02-23 | Центральный научно-исследовательский институт бумаги | Pulp bleaching process |
US4959124A (en) | 1989-05-05 | 1990-09-25 | International Paper Company | Method of bleaching kraft pulp in a DZED sequence |
WO1991005909A1 (en) * | 1989-10-19 | 1991-05-02 | North Carolina State University | High efficiency chlorine dioxide pulp bleaching process |
US5030324A (en) | 1990-01-29 | 1991-07-09 | Champion International Corporation | Sequential bleaching procedure using chlorine and chlorine dioxide in a first chlorination stage of a multistage bleaching process |
EP0500813A1 (en) | 1990-01-31 | 1992-09-02 | Eka Nobel Ab | Process for bleaching of ligno-cellulosic material. |
-
1999
- 1999-04-27 BR BR9901291A patent/BR9901291B1/en not_active IP Right Cessation
-
2000
- 2000-04-27 PT PT926590T patent/PT1180172E/en unknown
- 2000-04-27 WO PCT/BR2000/000038 patent/WO2000065148A1/en active Application Filing
- 2000-04-27 ES ES00926590.1T patent/ES2501141T3/en not_active Expired - Lifetime
- 2000-04-27 EP EP00926590.1A patent/EP1180172B1/en not_active Expired - Lifetime
- 2000-04-27 CA CA2372069A patent/CA2372069C/en not_active Expired - Lifetime
-
2001
- 2001-10-25 ZA ZA200108811A patent/ZA200108811B/en unknown
- 2001-10-26 NO NO20015241A patent/NO331632B1/en not_active IP Right Cessation
- 2001-10-26 IS IS6132A patent/IS6132A/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2093715A5 (en) * | 1970-05-25 | 1972-01-28 | Int Paper Co | |
SU1141128A1 (en) * | 1983-12-08 | 1985-02-23 | Центральный научно-исследовательский институт бумаги | Pulp bleaching process |
US4959124A (en) | 1989-05-05 | 1990-09-25 | International Paper Company | Method of bleaching kraft pulp in a DZED sequence |
WO1991005909A1 (en) * | 1989-10-19 | 1991-05-02 | North Carolina State University | High efficiency chlorine dioxide pulp bleaching process |
US5030324A (en) | 1990-01-29 | 1991-07-09 | Champion International Corporation | Sequential bleaching procedure using chlorine and chlorine dioxide in a first chlorination stage of a multistage bleaching process |
EP0500813A1 (en) | 1990-01-31 | 1992-09-02 | Eka Nobel Ab | Process for bleaching of ligno-cellulosic material. |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Section Ch Week 198537, Derwent World Patents Index; Class F09, AN 1985-228839, XP002143636 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002099186A1 (en) * | 2001-06-06 | 2002-12-12 | Kvaerner Pulping Ab | Reduction of organically bound chlorine formed in chlorine dioxide bleaching |
Also Published As
Publication number | Publication date |
---|---|
NO20015241D0 (en) | 2001-10-26 |
EP1180172B1 (en) | 2014-07-02 |
EP1180172A1 (en) | 2002-02-20 |
CA2372069A1 (en) | 2000-11-02 |
NO20015241L (en) | 2001-11-27 |
CA2372069C (en) | 2011-06-21 |
PT1180172E (en) | 2014-09-25 |
BR9901291B1 (en) | 2011-11-01 |
NO331632B1 (en) | 2012-02-13 |
IS6132A (en) | 2001-10-26 |
BR9901291A (en) | 2000-11-07 |
ES2501141T3 (en) | 2014-10-01 |
ZA200108811B (en) | 2002-10-25 |
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