CA2157109A1 - Method of bleaching pulp with chlorine-free chemicals - Google Patents
Method of bleaching pulp with chlorine-free chemicalsInfo
- Publication number
- CA2157109A1 CA2157109A1 CA002157109A CA2157109A CA2157109A1 CA 2157109 A1 CA2157109 A1 CA 2157109A1 CA 002157109 A CA002157109 A CA 002157109A CA 2157109 A CA2157109 A CA 2157109A CA 2157109 A1 CA2157109 A1 CA 2157109A1
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- ozone
- chlorine
- bleached
- bleaching pulp
- 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.)
- Granted
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
- D21C9/1026—Other features in bleaching 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
- 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
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating 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
- D21C9/1026—Other features in bleaching processes
- D21C9/1036—Use of compounds accelerating or improving the efficiency of the 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
- 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
- D21C9/147—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
- 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
Kraft pulp is bleached to an acceptable brightness (e.g.
86 ISO or more) without using chlorinated organic compounds, yet the strength of the produced pulp remains commercially acceptable. In the manufacture of pulp, the pulp which is cooked and oxygen delignified to a kappa number of 14 or less, and then is bleached with ozone at a medium consistency. After the ozone treatment, heavy metals are removed from the pulp, and then the pulp is led to oxygen and/or peroxide treatment, which is followed by a second ozone bleaching stage. The sequence (ZT) (EOP) (ZP) is preferred.
86 ISO or more) without using chlorinated organic compounds, yet the strength of the produced pulp remains commercially acceptable. In the manufacture of pulp, the pulp which is cooked and oxygen delignified to a kappa number of 14 or less, and then is bleached with ozone at a medium consistency. After the ozone treatment, heavy metals are removed from the pulp, and then the pulp is led to oxygen and/or peroxide treatment, which is followed by a second ozone bleaching stage. The sequence (ZT) (EOP) (ZP) is preferred.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI930954 | 1993-03-03 | ||
FI930954A FI93232C (en) | 1993-03-03 | 1993-03-03 | Method for bleaching pulp with chlorine-free chemicals |
PCT/FI1993/000222 WO1994020673A1 (en) | 1993-03-03 | 1993-05-25 | Method of bleaching pulp with chlorine-free chemicals |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2157109A1 true CA2157109A1 (en) | 1994-09-15 |
CA2157109C CA2157109C (en) | 2002-09-03 |
Family
ID=8537491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002157109A Expired - Fee Related CA2157109C (en) | 1993-03-03 | 1993-05-25 | Method of bleaching pulp with chlorine-free chemicals |
Country Status (13)
Country | Link |
---|---|
EP (2) | EP0687321B1 (en) |
JP (1) | JP3276083B2 (en) |
AT (2) | ATE228181T1 (en) |
AU (1) | AU5370594A (en) |
BR (1) | BR9307858A (en) |
CA (1) | CA2157109C (en) |
DE (2) | DE69332508T2 (en) |
ES (2) | ES2186948T3 (en) |
FI (3) | FI93232C (en) |
NO (1) | NO953444L (en) |
PT (1) | PT884415E (en) |
RU (1) | RU2126471C1 (en) |
WO (1) | WO1994020673A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI89516B (en) | 1989-05-10 | 1993-06-30 | Ahlstroem Oy | Foerfarande Foer blekning av cellulosamassa med Otson |
FI103818B (en) * | 1995-02-21 | 1999-09-30 | Ahlstrom Machinery Oy | Method for bleaching pulp |
US20080110584A1 (en) * | 2006-11-15 | 2008-05-15 | Caifang Yin | Bleaching process with at least one extraction stage |
FR2910027B1 (en) * | 2006-12-13 | 2009-11-06 | Itt Mfg Enterprises Inc | PROCESS FOR WHITENING CHEMICAL STRIPPING PASTES BY FINAL OZONE TREATMENT AT HIGH TEMPERATURE |
CN102459754B (en) | 2009-05-28 | 2015-04-29 | Gp纤维素股份有限公司 | Modified cellulose from chemical kraft fiber and methods of making and using same |
EP2714987B1 (en) | 2011-05-23 | 2015-07-29 | GP Cellulose GmbH | Softwood kraft fiber having improved whiteness and brightness and methods of making and using the same |
BR112014017164A8 (en) | 2012-01-12 | 2017-07-04 | Gp Cellulose Gmbh | method for producing oxidized kraft pulp and softwood kraft fibers |
MX364847B (en) | 2012-04-18 | 2019-05-08 | Gp Cellulose Gmbh | The use of surfactant to treat pulp and improve the incorporation of kraft pulp into fiber for the production of viscose and other secondary fiber products. |
AU2014213691B2 (en) | 2013-02-08 | 2017-03-16 | Gp Cellulose Gmbh | Softwood kraft fiber having an improved a-cellulose content and its use in the production of chemical cellulose products |
CA2901665A1 (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 |
CN108049234B (en) | 2013-03-15 | 2020-12-08 | Gp 纤维素股份有限公司 | Chemically modified kraft fiber |
FR3007044B1 (en) * | 2013-06-13 | 2016-01-15 | Air Liquide | PROCESS FOR TREATING CHEMICAL PAPER PASTES BY OZONE TREATMENT IN THE PRESENCE OF MAGNESIUM IONS |
AT515152B1 (en) * | 2013-11-26 | 2015-12-15 | Chemiefaser Lenzing Ag | A process for pretreating recovered cotton fibers for use in the manufacture of regenerated cellulose moldings |
CA3040734A1 (en) | 2016-11-16 | 2018-05-24 | Gp Cellulose Gmbh | Modified cellulose from chemical fiber and methods of making and using the same |
SE545759C2 (en) * | 2022-06-20 | 2024-01-02 | Valmet Oy | Method for bleaching pulp from recycled textile material |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO144711C (en) * | 1978-04-04 | 1981-10-21 | Myrens Verksted As | PROCEDURE FOR BLACKING OXYGEN-EQUIVALIZED CELLULOSE-containing OZONE |
US4310384A (en) * | 1979-01-11 | 1982-01-12 | Weyerhaeuser Company | Reducing chemical transfer between treatment stages |
FI74752C (en) * | 1986-03-20 | 1992-12-01 | Ahlstroem Oy | OVER ANCHORING OF CELLULOSE TV |
DE69004492T3 (en) * | 1989-06-06 | 2001-11-15 | Eka Nobel Ab | Process for bleaching pulps containing lignocellulose. |
AU636173B2 (en) * | 1989-10-30 | 1993-04-22 | Lenzing Aktiengesellschaft | Method for the chlorine-free bleaching of pulps |
US5567262A (en) * | 1991-04-16 | 1996-10-22 | Ahlstrom Machinery Inc. | Two stage pressure diffuser |
SE468355B (en) * | 1991-04-30 | 1992-12-21 | Eka Nobel Ab | CHEMISTRY OF CHEMICAL MASS THROUGH TREATMENT WITH COMPLEX PICTURES AND OZONE |
AT400153B (en) * | 1991-05-02 | 1995-10-25 | Voest Alpine Ind Anlagen | METHOD FOR BLEACHING MATERIALS CONTAINING XYLAN AND LIGNOCELLULOSE |
-
1993
- 1993-03-03 FI FI930954A patent/FI93232C/en active
- 1993-05-25 JP JP51962394A patent/JP3276083B2/en not_active Expired - Fee Related
- 1993-05-25 BR BR9307858A patent/BR9307858A/en not_active IP Right Cessation
- 1993-05-25 ES ES98113684T patent/ES2186948T3/en not_active Expired - Lifetime
- 1993-05-25 DE DE69332508T patent/DE69332508T2/en not_active Expired - Fee Related
- 1993-05-25 ES ES93910051T patent/ES2130260T3/en not_active Expired - Lifetime
- 1993-05-25 DE DE69323566T patent/DE69323566T2/en not_active Expired - Fee Related
- 1993-05-25 AU AU53705/94A patent/AU5370594A/en not_active Abandoned
- 1993-05-25 WO PCT/FI1993/000222 patent/WO1994020673A1/en active IP Right Grant
- 1993-05-25 RU RU95122814A patent/RU2126471C1/en active
- 1993-05-25 EP EP93910051A patent/EP0687321B1/en not_active Expired - Lifetime
- 1993-05-25 CA CA002157109A patent/CA2157109C/en not_active Expired - Fee Related
- 1993-05-25 AT AT98113684T patent/ATE228181T1/en not_active IP Right Cessation
- 1993-05-25 AT AT93910051T patent/ATE176808T1/en not_active IP Right Cessation
- 1993-05-25 EP EP98113684A patent/EP0884415B1/en not_active Expired - Lifetime
- 1993-05-25 PT PT98113684T patent/PT884415E/en unknown
- 1993-09-15 FI FI934036A patent/FI98223B/en not_active IP Right Cessation
-
1995
- 1995-08-30 FI FI954093A patent/FI954093A/en not_active IP Right Cessation
- 1995-09-01 NO NO953444A patent/NO953444L/en unknown
Also Published As
Publication number | Publication date |
---|---|
ES2186948T3 (en) | 2003-05-16 |
EP0687321B1 (en) | 1999-02-17 |
CA2157109C (en) | 2002-09-03 |
ATE228181T1 (en) | 2002-12-15 |
EP0687321A1 (en) | 1995-12-20 |
NO953444D0 (en) | 1995-09-01 |
FI934036A0 (en) | 1993-09-15 |
BR9307858A (en) | 1996-02-27 |
DE69323566T2 (en) | 1999-07-15 |
JPH08509781A (en) | 1996-10-15 |
EP0884415B1 (en) | 2002-11-20 |
EP0884415A1 (en) | 1998-12-16 |
NO953444L (en) | 1995-10-19 |
ES2130260T3 (en) | 1999-07-01 |
WO1994020673A1 (en) | 1994-09-15 |
FI930954A (en) | 1994-09-04 |
PT884415E (en) | 2003-03-31 |
RU2126471C1 (en) | 1999-02-20 |
FI98223B (en) | 1997-01-31 |
DE69323566D1 (en) | 1999-03-25 |
AU5370594A (en) | 1994-09-26 |
FI930954A0 (en) | 1993-03-03 |
FI93232B (en) | 1994-11-30 |
JP3276083B2 (en) | 2002-04-22 |
FI954093A (en) | 1995-10-17 |
ATE176808T1 (en) | 1999-03-15 |
FI934036A (en) | 1994-09-04 |
FI93232C (en) | 1995-03-10 |
DE69332508D1 (en) | 2003-01-02 |
DE69332508T2 (en) | 2003-07-03 |
FI954093A0 (en) | 1995-08-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |