SE9700992D0 - Method of bleaching kraft pulp - Google Patents
Method of bleaching kraft pulpInfo
- Publication number
- SE9700992D0 SE9700992D0 SE9700992A SE9700992A SE9700992D0 SE 9700992 D0 SE9700992 D0 SE 9700992D0 SE 9700992 A SE9700992 A SE 9700992A SE 9700992 A SE9700992 A SE 9700992A SE 9700992 D0 SE9700992 D0 SE 9700992D0
- Authority
- SE
- Sweden
- Prior art keywords
- bleaching
- kraft pulp
- pulp
- stage
- oxygen
- 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
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
-
- 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
Abstract
The present invention relates to a method of bleaching sulfate cellulose pulp to a brightness of at least ISO 85 by using at least two of the following bleaching chemicals: oxygen, ozone, and peroxide. Characteristic features of the invention are that the pulp is digested; subjected to a heavy metals removal treatment with at least one of the following treatment agents or methods: acidification, EDTA, and DTPA; delignified in a pressurized two-step oxygen stage; and bleached at least in one acid peroxide stage.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI944348A FI944348A (en) | 1994-09-19 | 1994-09-19 | Procedure for bleaching of pulp |
PCT/FI1995/000506 WO1996009434A1 (en) | 1994-09-19 | 1995-09-18 | Method of bleaching kraft pulp |
Publications (2)
Publication Number | Publication Date |
---|---|
SE9700992D0 true SE9700992D0 (en) | 1997-03-18 |
SE9700992L SE9700992L (en) | 1997-05-16 |
Family
ID=8541400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9700992A SE9700992L (en) | 1994-09-19 | 1997-03-18 | Procedure for bleaching of pulp |
Country Status (4)
Country | Link |
---|---|
CA (1) | CA2200327C (en) |
FI (1) | FI944348A (en) |
SE (1) | SE9700992L (en) |
WO (1) | WO1996009434A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030029589A1 (en) * | 1998-06-17 | 2003-02-13 | Nile Fiber Pulp & Paper, Inc. | Total chlorine free bleaching of Arundo donax pulp |
CN1231632C (en) | 1998-06-17 | 2005-12-14 | 尼勒纤维纸浆和纸公司 | Arundo donax pulp, paper products and particle board |
US8778136B2 (en) | 2009-05-28 | 2014-07-15 | 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 |
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 |
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 |
JP6254078B2 (en) | 2011-05-23 | 2017-12-27 | ゲーペー ツェルローゼ ゲーエムベーハー | Conifer craft fibers with improved whiteness and brightness, and methods of making and using the same |
KR102093167B1 (en) | 2012-01-12 | 2020-03-26 | 게페 첼루로제 게엠베하 | A low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same |
RU2636306C2 (en) | 2012-04-18 | 2017-11-21 | ДжиПи СЕЛЛЬЮЛОУС ГМБХ | Use of surfactants for pulp processing and improvement of craft pulp introduction in fibre for obtaining viscoose and other secondary fibre products |
MX365675B (en) | 2013-02-08 | 2019-06-10 | Gp Cellulose Gmbh | Softwood kraft fiber having an improved a-cellulose content and its use in the production of chemical cellulose products. |
WO2014140852A2 (en) | 2013-03-14 | 2014-09-18 | Gp Cellulose Gmbh | A method of making highly functional, low viscosity kraft fiber using an acidic bleaching sequence and a fiber made by the process |
BR112015020000A2 (en) | 2013-03-15 | 2017-07-18 | Gp Cellulose Gmbh | chemically modified kraft fiber and manufacturing methods |
CA3040734A1 (en) | 2016-11-16 | 2018-05-24 | Gp Cellulose Gmbh | Modified cellulose from chemical fiber and methods of making and using the same |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE420430B (en) * | 1978-02-17 | 1981-10-05 | Mo Och Domsjoe Ab | PROCEDURE FOR WHEATING AND EXTRACTION OF LIGNOCELLULOSALLY MATERIALS WITH PEROXID CONTAINING BLACKS |
US4427490A (en) * | 1978-04-07 | 1984-01-24 | International Paper Company | Delignification and bleaching process for lignocellulosic pulp with peroxide in the presence of metal additives |
DE3428352A1 (en) * | 1984-08-01 | 1986-02-13 | Degussa Ag, 6000 Frankfurt | METHOD FOR DELIGNIFICATION AND BLEACHING OF CELLULAS |
FR2655668B1 (en) * | 1989-12-11 | 1995-06-09 | Du Pin Cellulose | PROCESS FOR BLEACHING CHEMICAL CELLULOSIC PASTA. |
-
1994
- 1994-09-19 FI FI944348A patent/FI944348A/en not_active Application Discontinuation
-
1995
- 1995-09-18 WO PCT/FI1995/000506 patent/WO1996009434A1/en active Application Filing
- 1995-09-18 CA CA002200327A patent/CA2200327C/en not_active Expired - Fee Related
-
1997
- 1997-03-18 SE SE9700992A patent/SE9700992L/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
SE9700992L (en) | 1997-05-16 |
WO1996009434A1 (en) | 1996-03-28 |
FI944348A0 (en) | 1994-09-19 |
CA2200327C (en) | 2002-03-19 |
FI944348A (en) | 1996-03-20 |
CA2200327A1 (en) | 1996-03-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |