CA2275257A1 - Treatment of pulp with a chelating agent without using a bleaching tower - Google Patents
Treatment of pulp with a chelating agent without using a bleaching tower Download PDFInfo
- Publication number
- CA2275257A1 CA2275257A1 CA002275257A CA2275257A CA2275257A1 CA 2275257 A1 CA2275257 A1 CA 2275257A1 CA 002275257 A CA002275257 A CA 002275257A CA 2275257 A CA2275257 A CA 2275257A CA 2275257 A1 CA2275257 A1 CA 2275257A1
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- chelating agent
- mixing
- stage
- 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.)
- Abandoned
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)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9700030-1 | 1997-01-03 | ||
| SE9700030A SE508239C2 (sv) | 1997-01-03 | 1997-01-03 | Behandling av massa med komplexbildare i minst ett blandningssteg, utan användning av blektorn |
| PCT/SE1997/001853 WO1998029597A1 (en) | 1997-01-03 | 1997-11-06 | Treatment of pulp with a chelating agent without using a bleaching tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2275257A1 true CA2275257A1 (en) | 1998-07-09 |
Family
ID=20405369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002275257A Abandoned CA2275257A1 (en) | 1997-01-03 | 1997-11-06 | Treatment of pulp with a chelating agent without using a bleaching tower |
Country Status (16)
| Country | Link |
|---|---|
| EP (1) | EP0951599B1 (sv) |
| JP (1) | JP2001508837A (sv) |
| CN (1) | CN1103832C (sv) |
| AT (1) | ATE241725T1 (sv) |
| AU (1) | AU726599B2 (sv) |
| BR (1) | BR9714252A (sv) |
| CA (1) | CA2275257A1 (sv) |
| DE (1) | DE69722445T2 (sv) |
| ES (1) | ES2195123T3 (sv) |
| ID (1) | ID20003A (sv) |
| NO (1) | NO993290L (sv) |
| NZ (1) | NZ336204A (sv) |
| PT (1) | PT951599E (sv) |
| SE (1) | SE508239C2 (sv) |
| WO (1) | WO1998029597A1 (sv) |
| ZA (1) | ZA9710418B (sv) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446054B (zh) * | 2008-12-23 | 2010-04-14 | 华南理工大学 | 年产5万吨以上纸浆生产线的全无氯漂白方法 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE9201477L (sv) * | 1992-05-11 | 1993-06-28 | Kamyr Ab | Saett vid blekning av massa utan anvaendning av klorkemikalier |
| SE502665C2 (sv) * | 1993-06-11 | 1995-12-04 | Kvaerner Pulping Tech | Sätt och reaktor för ozonblekning |
| SE501836C2 (sv) * | 1993-09-21 | 1995-05-22 | Sunds Defibrator Ind Ab | Blekning av kemisk massa varvid massan behandlas med komplexbildare före och efter ett ozonsteg |
| SE504803C2 (sv) * | 1995-08-24 | 1997-04-28 | Sunds Defibrator Ind Ab | Behandling av massa med komplexbildare i minst två blandningssteg utan mellanliggande tvätt |
-
1997
- 1997-01-03 SE SE9700030A patent/SE508239C2/sv not_active IP Right Cessation
- 1997-11-06 EP EP97912616A patent/EP0951599B1/en not_active Expired - Lifetime
- 1997-11-06 DE DE69722445T patent/DE69722445T2/de not_active Expired - Fee Related
- 1997-11-06 NZ NZ336204A patent/NZ336204A/xx unknown
- 1997-11-06 JP JP52990798A patent/JP2001508837A/ja not_active Withdrawn
- 1997-11-06 PT PT97912616T patent/PT951599E/pt unknown
- 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
- 1997-11-06 ES ES97912616T patent/ES2195123T3/es not_active Expired - Lifetime
- 1997-11-06 AT AT97912616T patent/ATE241725T1/de not_active IP Right Cessation
- 1997-11-06 AU AU49741/97A patent/AU726599B2/en not_active Ceased
- 1997-11-06 BR BR9714252-2A patent/BR9714252A/pt not_active Application Discontinuation
- 1997-11-06 CN CN97181066A patent/CN1103832C/zh not_active Expired - Fee Related
- 1997-11-19 ZA ZA9710418A patent/ZA9710418B/xx unknown
- 1997-12-23 ID IDP973960A patent/ID20003A/id unknown
-
1999
- 1999-07-02 NO NO993290A patent/NO993290L/no unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO993290D0 (no) | 1999-07-02 |
| AU726599B2 (en) | 2000-11-16 |
| DE69722445T2 (de) | 2004-01-15 |
| NZ336204A (en) | 1999-11-29 |
| JP2001508837A (ja) | 2001-07-03 |
| AU4974197A (en) | 1998-07-31 |
| CN1242060A (zh) | 2000-01-19 |
| BR9714252A (pt) | 2000-04-18 |
| WO1998029597A1 (en) | 1998-07-09 |
| ID20003A (id) | 1998-09-10 |
| DE69722445D1 (de) | 2003-07-03 |
| SE9700030L (sv) | 1998-07-04 |
| CN1103832C (zh) | 2003-03-26 |
| SE508239C2 (sv) | 1998-09-21 |
| ATE241725T1 (de) | 2003-06-15 |
| EP0951599B1 (en) | 2003-05-28 |
| NO993290L (no) | 1999-09-02 |
| PT951599E (pt) | 2003-10-31 |
| SE9700030D0 (sv) | 1997-01-03 |
| ZA9710418B (en) | 1998-06-10 |
| EP0951599A1 (en) | 1999-10-27 |
| ES2195123T3 (es) | 2003-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0705360A1 (en) | A process for bleaching pulp without using chlorine-containing chemicals | |
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| EP0951599B1 (en) | Treatment of pulp with a chelating agent without using a bleaching tower | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |