DE60136079D1 - Zweistufiges chlorbleichverfahren mit filtratrückführung - Google Patents
Zweistufiges chlorbleichverfahren mit filtratrückführungInfo
- Publication number
- DE60136079D1 DE60136079D1 DE60136079T DE60136079T DE60136079D1 DE 60136079 D1 DE60136079 D1 DE 60136079D1 DE 60136079 T DE60136079 T DE 60136079T DE 60136079 T DE60136079 T DE 60136079T DE 60136079 D1 DE60136079 D1 DE 60136079D1
- Authority
- DE
- Germany
- Prior art keywords
- stage
- filtrat
- return
- pulp
- bleaching
- 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
- D21C9/12—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)
- Detergent Compositions (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0002930A SE516969C2 (sv) | 2000-08-14 | 2000-08-14 | Klordioxidblekning i två steg med återföring av filtrat |
PCT/SE2001/001752 WO2002014600A1 (en) | 2000-08-14 | 2001-08-14 | Two-stage chlorine bleaching process with filtrate recirculation |
Publications (1)
Publication Number | Publication Date |
---|---|
DE60136079D1 true DE60136079D1 (de) | 2008-11-20 |
Family
ID=20280715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE60136079T Expired - Fee Related DE60136079D1 (de) | 2000-08-14 | 2001-08-14 | Zweistufiges chlorbleichverfahren mit filtratrückführung |
Country Status (9)
Country | Link |
---|---|
US (1) | US7182835B2 (de) |
EP (1) | EP1311722B1 (de) |
JP (1) | JP2004506818A (de) |
AT (1) | ATE410542T1 (de) |
AU (1) | AU2001282761A1 (de) |
CA (1) | CA2417338C (de) |
DE (1) | DE60136079D1 (de) |
SE (1) | SE516969C2 (de) |
WO (1) | WO2002014600A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE516969C2 (sv) * | 2000-08-14 | 2002-03-26 | Metso Paper Inc | Klordioxidblekning i två steg med återföring av filtrat |
DE102006057861A1 (de) * | 2006-12-08 | 2008-06-12 | Voith Patent Gmbh | Verfahren zur Behandlung von beim Eindicken von Papierfasersuspension anfallendem Filtrat |
FI122241B (fi) * | 2007-06-15 | 2011-10-31 | Andritz Oy | Menetelmä massan pesun yhteydessä sellutehtaalla |
SE532370C2 (sv) * | 2008-02-28 | 2009-12-29 | Metso Paper Inc | Metod för blekning av en massa |
WO2011119423A2 (en) | 2010-03-23 | 2011-09-29 | International Paper Company | Improved bctmp filtrate recycling system and method |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3632469A (en) * | 1969-06-05 | 1972-01-04 | Ethyl Corp | Process for the manufacture of dissolving grade pulp |
SE390178B (sv) * | 1974-09-04 | 1976-12-06 | Sunds Ab | Sett vid blekning av lignocellulosahaltigt material med en kombination av gasfasklorering och ett system for fortrengningsblekning innehallande klordioxid |
ZA761255B (en) | 1975-03-11 | 1977-03-30 | Erco Envirotech Ltd | Bleachplant operation |
US4104114A (en) * | 1977-05-05 | 1978-08-01 | Erco Envirotech Ltd. | Bleach plant operation |
NZ235983A (en) * | 1989-11-08 | 1993-01-27 | Novo Nordisk As | Process for hydrolysis of resins in lignocellulosic pulp using enzymes simultaneously with peroxy bleaching; ctmp fluff-pulp and absorbent articles produced therefrom |
US5118389A (en) | 1990-07-06 | 1992-06-02 | Ici Canada Inc. | Two-stage peroxide bleaching process using different amounts of peroxide on different portions of mechanical pulp |
US5853535A (en) * | 1991-01-28 | 1998-12-29 | Champion International Corporation | Process for manufacturing bleached pulp including recycling |
DE19614587A1 (de) * | 1996-04-13 | 1997-10-16 | Jaschinski Thomas Dipl Holzw | Verfahren und Bleichlösung zum Bleichen von cellulosischen Faserstoffen |
US6569284B1 (en) * | 1996-09-24 | 2003-05-27 | International Paper Company | Elemental-chlorine-free bleaching process having an initial Eo or Eop stage |
US6315863B1 (en) * | 1998-06-18 | 2001-11-13 | Weyerhaeuser Company | Chlorine dioxide pulp bleaching process having reduced barium scaling by recycling post-chlorination waste filtrate |
SE516969C2 (sv) * | 2000-08-14 | 2002-03-26 | Metso Paper Inc | Klordioxidblekning i två steg med återföring av filtrat |
SE0300276L (sv) * | 2003-01-31 | 2003-12-09 | Kvaerner Pulping Tech | Förfarande för blekning av cellulosamassa samt bleklinje härför |
-
2000
- 2000-08-14 SE SE0002930A patent/SE516969C2/sv not_active IP Right Cessation
-
2001
- 2001-08-14 AT AT01961500T patent/ATE410542T1/de not_active IP Right Cessation
- 2001-08-14 US US10/344,425 patent/US7182835B2/en not_active Expired - Fee Related
- 2001-08-14 EP EP01961500A patent/EP1311722B1/de not_active Expired - Lifetime
- 2001-08-14 JP JP2002519719A patent/JP2004506818A/ja not_active Withdrawn
- 2001-08-14 WO PCT/SE2001/001752 patent/WO2002014600A1/en active Application Filing
- 2001-08-14 DE DE60136079T patent/DE60136079D1/de not_active Expired - Fee Related
- 2001-08-14 AU AU2001282761A patent/AU2001282761A1/en not_active Abandoned
- 2001-08-14 CA CA002417338A patent/CA2417338C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US7182835B2 (en) | 2007-02-27 |
CA2417338A1 (en) | 2002-02-21 |
SE0002930L (sv) | 2002-02-15 |
AU2001282761A1 (en) | 2002-02-25 |
ATE410542T1 (de) | 2008-10-15 |
EP1311722B1 (de) | 2008-10-08 |
US20030178163A1 (en) | 2003-09-25 |
SE0002930D0 (sv) | 2000-08-14 |
CA2417338C (en) | 2009-12-15 |
EP1311722A1 (de) | 2003-05-21 |
SE516969C2 (sv) | 2002-03-26 |
JP2004506818A (ja) | 2004-03-04 |
WO2002014600A1 (en) | 2002-02-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8363 | Opposition against the patent | ||
8339 | Ceased/non-payment of the annual fee |