CA2270967A1 - Blanchiment de pate a papier cellulosique a l'aide d'ozone et de peracide - Google Patents
Blanchiment de pate a papier cellulosique a l'aide d'ozone et de peracide Download PDFInfo
- Publication number
- CA2270967A1 CA2270967A1 CA002270967A CA2270967A CA2270967A1 CA 2270967 A1 CA2270967 A1 CA 2270967A1 CA 002270967 A CA002270967 A CA 002270967A CA 2270967 A CA2270967 A CA 2270967A CA 2270967 A1 CA2270967 A1 CA 2270967A1
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- stage
- ozone
- bleaching
- paa
- 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.)
- Abandoned
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
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
L'invention concerne un procédé de production de pâte à papier, lequel consiste à traiter cette pâte à l'aide d'ozone au cours d'au moins une étape de blanchiment. Selon l'invention, on met en contact la pâte à papier traitée à l'ozone avec un acide péroxyalcanoïque, dans des conditions acides, de façon à diminuer le caractère labile des alcalis de la pâte, puis on soumet la pâte ainsi traitée à une étape d'extraction alcaline ou de blanchiment au peroxyde. Les séquences de blanchiment sont ainsi du type Z/Paa/E ou Z/Paa/P, par exemple. La pâte à papier ainsi produite présente un indice kappa inférieur à 2, une viscosité supérieure à 600 ml/g, un indice de déchirement (T70) supérieur à 13 mN m?2¿/g ainsi qu'un indice de résistance à la traction à mâchoires jointes (T70), supérieur à 100N m/g pour une feuille mouillée.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI964715A FI964715A (fi) | 1996-11-26 | 1996-11-26 | Menetelmä selluloosamassan valkaisemiseksi |
FI964715 | 1996-11-26 | ||
PCT/FI1997/000730 WO1998023811A1 (fr) | 1996-11-26 | 1997-11-26 | Blanchiment de pate a papier cellulosique a l'aide d'ozone et de peracide |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2270967A1 true CA2270967A1 (fr) | 1998-06-04 |
Family
ID=8547143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002270967A Abandoned CA2270967A1 (fr) | 1996-11-26 | 1997-11-26 | Blanchiment de pate a papier cellulosique a l'aide d'ozone et de peracide |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0946819A1 (fr) |
AU (1) | AU5056198A (fr) |
CA (1) | CA2270967A1 (fr) |
FI (1) | FI964715A (fr) |
WO (1) | WO1998023811A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI112958B (fi) * | 1997-12-19 | 2004-02-13 | Kemira Oyj | Menetelmä kemiallisen massan valkaisemiseksi sekä valkaisuliuoksen käyttö |
EP1101860A1 (fr) * | 1999-11-19 | 2001-05-23 | Praxair Technology, Inc. | Procédé de blanchiment de pate a papier par ozone activé |
GB2382592A (en) * | 2001-11-30 | 2003-06-04 | Sca Hygiene Prod Gmbh | Use of ozone to enhance the wet strength of fibrous cellulosic material |
FI127996B (en) * | 2016-07-01 | 2019-07-15 | Kemira Oyj | Process for treating cellulose |
WO2019048698A1 (fr) * | 2017-09-11 | 2019-03-14 | Kemira Oyj | Procédé de traitement de pâte |
RU2724362C1 (ru) * | 2019-07-04 | 2020-06-23 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный университет промышленных технологий и дизайна (СПбГУПТД)" | Способ отбелки целлюлозы |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1004974A3 (fr) * | 1991-06-06 | 1993-03-09 | Interox Internat Sa | Procede pour le blanchiment et la delignification de pates a papier chimiques et application de ce procede au blanchiment et a la delignification des pates kraft et des pates asam. |
FR2692917A1 (fr) * | 1992-06-30 | 1993-12-31 | Air Liquide | Procédé de blanchiment d'une pâte papetière chimique. |
US5387317A (en) * | 1993-01-28 | 1995-02-07 | The Mead Corporation | Oxygen/ozone/peracetic aicd delignification and bleaching of cellulosic pulps |
US5411635A (en) * | 1993-03-22 | 1995-05-02 | The Research Foundation Of State University Of New York | Ozone/peroxymonosulfate process for delignifying a lignocellulosic material |
SE506480C2 (sv) * | 1995-06-29 | 1997-12-22 | Sca Graphic Res Ab | Blekning av lignocellulosahaltigt fibermaterial med ozon och persyra i ett kombinationssteg |
-
1996
- 1996-11-26 FI FI964715A patent/FI964715A/fi not_active IP Right Cessation
-
1997
- 1997-11-26 CA CA002270967A patent/CA2270967A1/fr not_active Abandoned
- 1997-11-26 EP EP97913227A patent/EP0946819A1/fr not_active Withdrawn
- 1997-11-26 WO PCT/FI1997/000730 patent/WO1998023811A1/fr not_active Application Discontinuation
- 1997-11-26 AU AU50561/98A patent/AU5056198A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP0946819A1 (fr) | 1999-10-06 |
FI964715A (fi) | 1998-05-27 |
FI964715A0 (fi) | 1996-11-26 |
WO1998023811A1 (fr) | 1998-06-04 |
AU5056198A (en) | 1998-06-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
FZDE | Discontinued |