CA2031848A1 - Method of bleaching pulp - Google Patents
Method of bleaching pulpInfo
- Publication number
- CA2031848A1 CA2031848A1 CA2031848A CA2031848A CA2031848A1 CA 2031848 A1 CA2031848 A1 CA 2031848A1 CA 2031848 A CA2031848 A CA 2031848A CA 2031848 A CA2031848 A CA 2031848A CA 2031848 A1 CA2031848 A1 CA 2031848A1
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- bleaching
- ozone
- chlorine dioxide
- added
- 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
- D21C9/147—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
- D21C9/12—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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
A method of bleaching pulp of cellulosic fibrous material in the production of chemical pulp in a bleach plant is described wherein the entering pulp is fed continuously in a bleaching line thereof. The method comprises the step of bleaching the pulp with chlorine dioxide and ozone in one and the same stage in optional sequence.
Chlorine dioxide and ozone are added at points separated from each other and each at at least one point in the bleaching line. Said stage is free from intermediate washing between the points where chlorine dioxide and ozone are added.
Chlorine dioxide and ozone are added at points separated from each other and each at at least one point in the bleaching line. Said stage is free from intermediate washing between the points where chlorine dioxide and ozone are added.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8904403-6 | 1989-12-29 | ||
SE8904403A SE467260B (en) | 1989-12-29 | 1989-12-29 | WHITING CELLULOSAMASSA WITH CHLORIDE Dioxide AND OZONE IN ONE AND SAME STEP |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2031848A1 true CA2031848A1 (en) | 1991-06-30 |
CA2031848C CA2031848C (en) | 1995-11-21 |
Family
ID=20377904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002031848A Expired - Lifetime CA2031848C (en) | 1989-12-29 | 1990-12-10 | Method of bleaching pulp |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPH04289288A (en) |
AT (1) | AT396129B (en) |
BR (1) | BR9006578A (en) |
CA (1) | CA2031848C (en) |
DE (1) | DE4039099C2 (en) |
FI (1) | FI95291C (en) |
FR (1) | FR2656634B1 (en) |
NO (1) | NO176061C (en) |
SE (1) | SE467260B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5387317A (en) * | 1993-01-28 | 1995-02-07 | The Mead Corporation | Oxygen/ozone/peracetic aicd delignification and bleaching of cellulosic pulps |
US6174409B1 (en) | 1997-09-19 | 2001-01-16 | American Air Liquide Inc. | Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process |
WO2022028500A1 (en) * | 2020-08-07 | 2022-02-10 | 齐鲁工业大学 | Sulfate wood pulp short-procedure ecf bleaching process x/z/d-eop-d or x/d/z-eop-d |
WO2022028385A1 (en) * | 2020-08-07 | 2022-02-10 | 齐鲁工业大学 | Short-procedure ecf bleaching process x/d-z-p(x/z-d-p) for sulfate wood pulp |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5322598A (en) * | 1990-02-06 | 1994-06-21 | Olin Corporation | Chlorine dioxide generation using inert load of sodium perchlorate |
FI925558A (en) | 1992-04-22 | 1993-10-23 | Ahlstroem Oy | FOERFARANDE OCH ANORDNING FOER BLEKNING AV MASSA |
WO1997006304A1 (en) | 1995-08-10 | 1997-02-20 | Sanyo Chemical Industries, Ltd. | Process for bleaching cellulose pulp |
FR2743094B1 (en) * | 1995-12-27 | 1998-02-13 | Centre Tech Ind Papier | PROCESS FOR BLEACHING CHEMICAL PULP |
ID23571A (en) * | 1997-08-25 | 2000-05-04 | Praxair Technology Inc | METHOD OF OZONE APPLICATION IN ECF BLEACHING |
AU8642698A (en) * | 1998-07-31 | 2000-02-28 | Asia Pulp & Paper Co Ltd | An improved method for bleaching pulp |
JP2002069879A (en) * | 2000-09-04 | 2002-03-08 | Nippon Paper Industries Co Ltd | Method for bleaching pulp of cellulosic fiber material |
SE532470C2 (en) * | 2008-05-13 | 2010-02-02 | Metso Paper Inc | Final bleaching of oxygen delignified pulp with ozone, chlorine dioxide and peroxide |
JP5987223B2 (en) * | 2012-03-06 | 2016-09-07 | 愛媛県 | Method for producing cellulose solution, method for producing cellulose, method for saccharification of cellulose |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1298875B (en) * | 1965-01-09 | 1969-07-03 | Gunnar Alexander Dipl Ing | Process for bleaching cellulose in a chlorine bleach bath and with ozone |
US4080249A (en) * | 1976-06-02 | 1978-03-21 | International Paper Company | Delignification and bleaching of a lignocellulosic pulp slurry with ozone |
US4902381A (en) * | 1988-12-09 | 1990-02-20 | Kamyr, Inc. | Method of bleaching pulp with ozone-chlorine mixtures |
US4959124A (en) * | 1989-05-05 | 1990-09-25 | International Paper Company | Method of bleaching kraft pulp in a DZED sequence |
FI89516B (en) * | 1989-05-10 | 1993-06-30 | Ahlstroem Oy | Foerfarande Foer blekning av cellulosamassa med Otson |
-
1989
- 1989-12-29 SE SE8904403A patent/SE467260B/en unknown
-
1990
- 1990-12-07 DE DE4039099A patent/DE4039099C2/en not_active Expired - Fee Related
- 1990-12-10 CA CA002031848A patent/CA2031848C/en not_active Expired - Lifetime
- 1990-12-12 AT AT0251990A patent/AT396129B/en not_active IP Right Cessation
- 1990-12-26 BR BR909006578A patent/BR9006578A/en not_active IP Right Cessation
- 1990-12-27 NO NO905599A patent/NO176061C/en not_active IP Right Cessation
- 1990-12-27 FI FI906400A patent/FI95291C/en active IP Right Grant
- 1990-12-28 JP JP2415577A patent/JPH04289288A/en active Pending
- 1990-12-28 FR FR9016500A patent/FR2656634B1/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5387317A (en) * | 1993-01-28 | 1995-02-07 | The Mead Corporation | Oxygen/ozone/peracetic aicd delignification and bleaching of cellulosic pulps |
US6174409B1 (en) | 1997-09-19 | 2001-01-16 | American Air Liquide Inc. | Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process |
WO2022028500A1 (en) * | 2020-08-07 | 2022-02-10 | 齐鲁工业大学 | Sulfate wood pulp short-procedure ecf bleaching process x/z/d-eop-d or x/d/z-eop-d |
WO2022028385A1 (en) * | 2020-08-07 | 2022-02-10 | 齐鲁工业大学 | Short-procedure ecf bleaching process x/d-z-p(x/z-d-p) for sulfate wood pulp |
Also Published As
Publication number | Publication date |
---|---|
NO176061C (en) | 1995-01-25 |
SE467260B (en) | 1992-06-22 |
SE8904403L (en) | 1991-06-30 |
FI906400A0 (en) | 1990-12-27 |
DE4039099C2 (en) | 1994-01-27 |
NO905599D0 (en) | 1990-12-27 |
FR2656634A1 (en) | 1991-07-05 |
FI95291C (en) | 1996-01-10 |
CA2031848C (en) | 1995-11-21 |
SE8904403D0 (en) | 1989-12-29 |
FI906400A (en) | 1991-06-30 |
ATA251990A (en) | 1992-10-15 |
AT396129B (en) | 1993-06-25 |
JPH04289288A (en) | 1992-10-14 |
BR9006578A (en) | 1991-10-01 |
FI95291B (en) | 1995-09-29 |
NO905599L (en) | 1991-07-01 |
DE4039099A1 (en) | 1991-07-04 |
NO176061B (en) | 1994-10-17 |
FR2656634B1 (en) | 1996-07-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed | ||
MKEC | Expiry (correction) |
Effective date: 20121202 |