DE69722445D1 - TREATMENT OF CELL WITH A COMPLEX IMAGE WITHOUT THE USE OF A LIGHT TOWER - Google Patents
TREATMENT OF CELL WITH A COMPLEX IMAGE WITHOUT THE USE OF A LIGHT TOWERInfo
- Publication number
- DE69722445D1 DE69722445D1 DE69722445T DE69722445T DE69722445D1 DE 69722445 D1 DE69722445 D1 DE 69722445D1 DE 69722445 T DE69722445 T DE 69722445T DE 69722445 T DE69722445 T DE 69722445T DE 69722445 D1 DE69722445 D1 DE 69722445D1
- Authority
- DE
- Germany
- Prior art keywords
- pulp
- cell
- treatment
- chelating agent
- complex image
- 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
- D21C9/02—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
- D21C9/1042—Use of chelating agents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Detergent Compositions (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Hybrid Cells (AREA)
- Noodles (AREA)
Abstract
A method at chlorine-free bleaching of pulp where metals are removed by means of chelating agent. The chelating agent is mixed with the pulp in at least one effective mixing step without intermediate washing, whereafter the pulp without an intermediate tower passes directly to a pulp washer. The total retention time shall be at maximum 15 minutes, calculated after the chelating agent addition.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9700030A SE508239C2 (en) | 1997-01-03 | 1997-01-03 | Treatment of pulp with complexing agents in at least one mixing step, without the use of the bleaching tower |
PCT/SE1997/001853 WO1998029597A1 (en) | 1997-01-03 | 1997-11-06 | Treatment of pulp with a chelating agent without using a bleaching tower |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69722445D1 true DE69722445D1 (en) | 2003-07-03 |
DE69722445T2 DE69722445T2 (en) | 2004-01-15 |
Family
ID=20405369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69722445T Expired - Fee Related DE69722445T2 (en) | 1997-01-03 | 1997-11-06 | TREATMENT OF CELL WITH A COMPLEX IMAGE WITHOUT THE USE OF A LIGHT TOWER |
Country Status (16)
Country | Link |
---|---|
EP (1) | EP0951599B1 (en) |
JP (1) | JP2001508837A (en) |
CN (1) | CN1103832C (en) |
AT (1) | ATE241725T1 (en) |
AU (1) | AU726599B2 (en) |
BR (1) | BR9714252A (en) |
CA (1) | CA2275257A1 (en) |
DE (1) | DE69722445T2 (en) |
ES (1) | ES2195123T3 (en) |
ID (1) | ID20003A (en) |
NO (1) | NO993290L (en) |
NZ (1) | NZ336204A (en) |
PT (1) | PT951599E (en) |
SE (1) | SE508239C2 (en) |
WO (1) | WO1998029597A1 (en) |
ZA (1) | ZA9710418B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101446054B (en) * | 2008-12-23 | 2010-04-14 | 华南理工大学 | Total-chlorine-free bleaching method of paper pulp production line with annual output of more than 50,000 tons |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9201477L (en) * | 1992-05-11 | 1993-06-28 | Kamyr Ab | SEATING WHITE PILLOW WITHOUT USING CHLORIC CHEMICALS |
SE502665C2 (en) * | 1993-06-11 | 1995-12-04 | Kvaerner Pulping Tech | Methods and reactor for ozone bleaching |
SE501836C2 (en) * | 1993-09-21 | 1995-05-22 | Sunds Defibrator Ind Ab | Bleaching of chemical pulp whereby the pulp is treated with complexing agents before and after an ozone step |
SE504803C2 (en) * | 1995-08-24 | 1997-04-28 | Sunds Defibrator Ind Ab | Treatment of pulp with complexing agents in at least two mixing steps without intermediate washing |
-
1997
- 1997-01-03 SE SE9700030A patent/SE508239C2/en not_active IP Right Cessation
- 1997-11-06 NZ NZ336204A patent/NZ336204A/en unknown
- 1997-11-06 PT PT97912616T patent/PT951599E/en unknown
- 1997-11-06 JP JP52990798A patent/JP2001508837A/en not_active Withdrawn
- 1997-11-06 CN CN97181066A patent/CN1103832C/en not_active Expired - Fee Related
- 1997-11-06 EP EP97912616A patent/EP0951599B1/en not_active Expired - Lifetime
- 1997-11-06 AU AU49741/97A patent/AU726599B2/en not_active Ceased
- 1997-11-06 DE DE69722445T patent/DE69722445T2/en not_active Expired - Fee Related
- 1997-11-06 BR BR9714252-2A patent/BR9714252A/en not_active Application Discontinuation
- 1997-11-06 ES ES97912616T patent/ES2195123T3/en not_active Expired - Lifetime
- 1997-11-06 AT AT97912616T patent/ATE241725T1/en not_active IP Right Cessation
- 1997-11-06 WO PCT/SE1997/001853 patent/WO1998029597A1/en active IP Right Grant
- 1997-11-06 CA CA002275257A patent/CA2275257A1/en not_active Abandoned
- 1997-11-19 ZA ZA9710418A patent/ZA9710418B/en unknown
- 1997-12-23 ID IDP973960A patent/ID20003A/en unknown
-
1999
- 1999-07-02 NO NO993290A patent/NO993290L/en unknown
Also Published As
Publication number | Publication date |
---|---|
ID20003A (en) | 1998-09-10 |
AU726599B2 (en) | 2000-11-16 |
CN1242060A (en) | 2000-01-19 |
NZ336204A (en) | 1999-11-29 |
ZA9710418B (en) | 1998-06-10 |
AU4974197A (en) | 1998-07-31 |
CA2275257A1 (en) | 1998-07-09 |
SE508239C2 (en) | 1998-09-21 |
ATE241725T1 (en) | 2003-06-15 |
NO993290D0 (en) | 1999-07-02 |
CN1103832C (en) | 2003-03-26 |
JP2001508837A (en) | 2001-07-03 |
SE9700030L (en) | 1998-07-04 |
SE9700030D0 (en) | 1997-01-03 |
PT951599E (en) | 2003-10-31 |
BR9714252A (en) | 2000-04-18 |
EP0951599A1 (en) | 1999-10-27 |
EP0951599B1 (en) | 2003-05-28 |
NO993290L (en) | 1999-09-02 |
ES2195123T3 (en) | 2003-12-01 |
DE69722445T2 (en) | 2004-01-15 |
WO1998029597A1 (en) | 1998-07-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |