CA2264423C - Method for treatment of pulp - Google Patents
Method for treatment of pulp Download PDFInfo
- Publication number
- CA2264423C CA2264423C CA002264423A CA2264423A CA2264423C CA 2264423 C CA2264423 C CA 2264423C CA 002264423 A CA002264423 A CA 002264423A CA 2264423 A CA2264423 A CA 2264423A CA 2264423 C CA2264423 C CA 2264423C
- Authority
- CA
- Canada
- Prior art keywords
- chlorine dioxide
- pulp
- treatment
- stage
- temperature
- 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.)
- Expired - Fee Related
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
- D21C9/10—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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI980519A FI119383B (fi) | 1998-03-06 | 1998-03-06 | Menetelmä massan käsittelemiseksi |
FI980519 | 1998-03-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2264423A1 CA2264423A1 (en) | 1999-09-06 |
CA2264423C true CA2264423C (en) | 2003-01-28 |
Family
ID=8551173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002264423A Expired - Fee Related CA2264423C (en) | 1998-03-06 | 1999-03-05 | Method for treatment of pulp |
Country Status (7)
Country | Link |
---|---|
US (1) | US20020056533A1 (pt) |
EP (1) | EP0940498B1 (pt) |
CA (1) | CA2264423C (pt) |
DE (1) | DE69931295D1 (pt) |
ES (1) | ES2263236T3 (pt) |
FI (1) | FI119383B (pt) |
PT (1) | PT940498E (pt) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE524896C2 (sv) * | 2003-03-07 | 2004-10-19 | Kvaerner Pulping Tech | Blekning av cellulosamassa med klordioxid i två faser med uppvärmning mellan faserna |
US20060201642A1 (en) * | 2005-03-08 | 2006-09-14 | Andritz Inc. | Methods of treating chemical cellulose pulp |
PT2082096E (pt) * | 2006-10-11 | 2013-04-26 | Akzo Nobel Nv | Branqueamento de pasta de papel |
US8920603B2 (en) | 2006-10-11 | 2014-12-30 | Akzo Nobel N.V. | Bleaching of pulp |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5268075A (en) * | 1989-10-19 | 1993-12-07 | North Carolina State University | High efficiency two-step, high-low pH chlorine dioxide pulp bleaching process |
US6776876B1 (en) * | 1994-10-13 | 2004-08-17 | Andritz Oy | Method of treating cellulosic pulp to remove hexenuronic acid |
FI102301B (fi) * | 1994-10-13 | 1998-11-13 | Andritz Oy | Menetelmä selluloosamassojen käsittelemiseksi |
FI105701B (fi) * | 1995-10-20 | 2000-09-29 | Ahlstrom Machinery Oy | Menetelmä ja laitteisto massan käsittelemiseksi |
-
1998
- 1998-03-06 FI FI980519A patent/FI119383B/fi active IP Right Grant
-
1999
- 1999-03-05 US US09/262,912 patent/US20020056533A1/en not_active Abandoned
- 1999-03-05 DE DE69931295T patent/DE69931295D1/de not_active Expired - Lifetime
- 1999-03-05 CA CA002264423A patent/CA2264423C/en not_active Expired - Fee Related
- 1999-03-05 EP EP99103920A patent/EP0940498B1/en not_active Expired - Lifetime
- 1999-03-05 PT PT99103920T patent/PT940498E/pt unknown
- 1999-03-05 ES ES99103920T patent/ES2263236T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FI980519A (fi) | 1999-09-07 |
PT940498E (pt) | 2006-09-29 |
FI119383B (fi) | 2008-10-31 |
FI980519A0 (fi) | 1998-03-06 |
US20020056533A1 (en) | 2002-05-16 |
CA2264423A1 (en) | 1999-09-06 |
EP0940498B1 (en) | 2006-05-17 |
ES2263236T3 (es) | 2006-12-01 |
DE69931295D1 (de) | 2006-06-22 |
EP0940498A1 (en) | 1999-09-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0856080B1 (en) | Acid treatment of pulp at high temperature in connection with bleaching | |
US5415734A (en) | Process for bleaching pulp without using chlorine containing chemicals | |
US6736934B1 (en) | Method of pretreating pulp in an acid tower prior to bleaching with peroxide | |
CA2111519C (en) | Oxygen/ozone/peracetic acid delignification and bleaching of cellulosic pulps | |
US6010594A (en) | Method of bleaching pulp with chlorine-free chemicals wherein a complexing agent is added immediately after an ozone bleach stage | |
JP3276083B2 (ja) | 塩素を含まない薬品によるパルプ漂白法 | |
US6605181B1 (en) | Peroxide bleach sequence including an acidic bleach stage and including a wash stage | |
CA2264423C (en) | Method for treatment of pulp | |
CA2225023C (en) | Method and apparatus for treating pulp in an indirect heat exchanger in connection with bleaching | |
US6106667A (en) | Treatment of recycled bleach plant filtrates | |
US5728264A (en) | Avoidance of salt scaling by acidic pulp washing process | |
EP0797703B1 (en) | Peroxide bleaching process for cellulosic and lignocellulosic material | |
CA2275710C (en) | Treatment of bleach plant filtrates with oxygen | |
EP0702735A1 (en) | Method of bleaching pulp without using chlorine chemicals | |
CA2170733A1 (en) | Medium consistency ozone brightening of high consistency ozone bleached pulp | |
AU726599B2 (en) | Treatment of pulp with a chelating agent without using a bleaching tower | |
EP1242678B1 (en) | Method for bleaching pulp with chlorine dioxide | |
CA2134730C (en) | Chlorine-free bleaching with short sequence and filtrate recirculation | |
CA2144677A1 (en) | Method of tcf or ecf bleaching of cellulose pulp | |
US20020088571A1 (en) | Method and apparatus for treating pulp | |
JPH0593385A (ja) | セルロースパルプの酸素による脱リグニン方法 | |
WO2007108760A1 (en) | Final bleaching of cellulose pulp with ozone |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |