CA2219767A1 - Treatment of pulp with chelating agent and subsequent bleaching at a ph value above 9 - Google Patents
Treatment of pulp with chelating agent and subsequent bleaching at a ph value above 9 Download PDFInfo
- Publication number
- CA2219767A1 CA2219767A1 CA002219767A CA2219767A CA2219767A1 CA 2219767 A1 CA2219767 A1 CA 2219767A1 CA 002219767 A CA002219767 A CA 002219767A CA 2219767 A CA2219767 A CA 2219767A CA 2219767 A1 CA2219767 A1 CA 2219767A1
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- chelating agent
- bleaching
- hydrogen peroxide
- treatment
- 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
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1026—Other features in bleaching processes
- D21C9/1042—Use of chelating 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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
-
- 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
- D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
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 |
---|---|---|---|
SE9501623-4 | 1995-05-02 | ||
SE9501623A SE9501623L (sv) | 1995-05-02 | 1995-05-02 | Blekning av massa |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2219767A1 true CA2219767A1 (en) | 1996-11-07 |
Family
ID=20398166
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002219767A Abandoned CA2219767A1 (en) | 1995-05-02 | 1996-03-27 | Treatment of pulp with chelating agent and subsequent bleaching at a ph value above 9 |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPH11504399A (no) |
CA (1) | CA2219767A1 (no) |
FI (1) | FI974115A0 (no) |
NO (1) | NO975038D0 (no) |
SE (1) | SE9501623L (no) |
WO (1) | WO1996035015A1 (no) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE509444C2 (sv) * | 1997-05-14 | 1999-01-25 | Mo Och Domsjoe Ab | Förfarande för minimering av kalcium orsakat inkrustproblem vid framställning av blekt cellulosamassa |
CA2310278A1 (en) * | 1997-11-25 | 1999-06-03 | Amylum Belgium N.V. | Improvements to the bleaching process for chemical pulp and intermediate pulp dispersions |
BE1011785A3 (fr) * | 1998-03-10 | 2000-01-11 | Solvay | Procede de blanchiment et/ou de delignification de pates a papier chimiques. |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2096441T3 (es) * | 1992-11-27 | 1997-03-01 | Eka Chemicals Ab | Procedimiento para deslignificar pasta que contiene lignocelulosa. |
US5554259A (en) * | 1993-10-01 | 1996-09-10 | Union Camp Patent Holdings, Inc. | Reduction of salt scale precipitation by control of process stream Ph and salt concentration |
-
1995
- 1995-05-02 SE SE9501623A patent/SE9501623L/ not_active Application Discontinuation
-
1996
- 1996-03-27 CA CA002219767A patent/CA2219767A1/en not_active Abandoned
- 1996-03-27 JP JP8533220A patent/JPH11504399A/ja active Pending
- 1996-03-27 WO PCT/SE1996/000405 patent/WO1996035015A1/en active Application Filing
-
1997
- 1997-10-31 NO NO975038A patent/NO975038D0/no unknown
- 1997-11-03 FI FI974115A patent/FI974115A0/fi unknown
Also Published As
Publication number | Publication date |
---|---|
NO975038L (no) | 1997-10-31 |
WO1996035015A1 (en) | 1996-11-07 |
FI974115A (fi) | 1997-11-03 |
SE9501623D0 (sv) | 1995-05-02 |
JPH11504399A (ja) | 1999-04-20 |
NO975038D0 (no) | 1997-10-31 |
FI974115A0 (fi) | 1997-11-03 |
SE9501623L (sv) | 1996-11-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Discontinued |