FI941229A - Method for bleaching pulp - Google Patents
Method for bleaching pulp Download PDFInfo
- Publication number
- FI941229A FI941229A FI941229A FI941229A FI941229A FI 941229 A FI941229 A FI 941229A FI 941229 A FI941229 A FI 941229A FI 941229 A FI941229 A FI 941229A FI 941229 A FI941229 A FI 941229A
- Authority
- FI
- Finland
- Prior art keywords
- bleaching
- pulp
- needing
- temperature
- consistency
- Prior art date
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
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
- D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
The present invention deals with a method for bleaching of pulp. In particular, the invention calls for bleaching of TCF pulp at medium consistency, 5-25 percent, and a conventional bleaching temperature, 80-120 degrees Celsius, by using ozone as one of the bleaching chemicals. A characteristic feature of the method according to the present invention is that the medium- consistency pulp can be bleached with ozone directly at a temperature at which the pulp arrives from the preceding bleaching stage, without needing to be cooled down, and the pulp can be fed to the following bleaching stage without needing to be specially heated.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI941229A FI98839B (en) | 1994-03-16 | 1994-03-16 | Method for bleaching of pulp |
FI950200A FI950200A (en) | 1994-03-16 | 1995-01-17 | Method for bleaching pulp |
CA002144677A CA2144677A1 (en) | 1994-03-16 | 1995-03-15 | Method of tcf or ecf bleaching of cellulose pulp |
SE9500927A SE9500927A0 (en) | 1994-03-16 | 1995-03-16 | Method for tcf or efc bleaching of pulp |
SE9500926A SE511743C3 (en) | 1994-03-16 | 1995-03-16 | Ozone bleaching at medium concentration and high temperature |
CA002144825A CA2144825A1 (en) | 1994-03-16 | 1995-03-16 | Method of bleaching cellulose pulp |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI941229A FI98839B (en) | 1994-03-16 | 1994-03-16 | Method for bleaching of pulp |
FI941229 | 1994-03-16 |
Publications (3)
Publication Number | Publication Date |
---|---|
FI941229A0 FI941229A0 (en) | 1994-03-16 |
FI941229A true FI941229A (en) | 1995-09-17 |
FI98839B FI98839B (en) | 1997-05-15 |
Family
ID=8540324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI941229A FI98839B (en) | 1994-03-16 | 1994-03-16 | Method for bleaching of pulp |
Country Status (3)
Country | Link |
---|---|
CA (1) | CA2144825A1 (en) |
FI (1) | FI98839B (en) |
SE (1) | SE511743C3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI105701B (en) | 1995-10-20 | 2000-09-29 | Ahlstrom Machinery Oy | Method and arrangement for treatment of pulp |
CN113897813B (en) * | 2021-09-17 | 2022-10-04 | 华南理工大学 | Method for bleaching eucalyptus plate bark pulp by ozone in short sequence |
-
1994
- 1994-03-16 FI FI941229A patent/FI98839B/en active
-
1995
- 1995-03-16 CA CA002144825A patent/CA2144825A1/en not_active Abandoned
- 1995-03-16 SE SE9500926A patent/SE511743C3/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CA2144825A1 (en) | 1995-09-17 |
SE511743C3 (en) | 2000-01-10 |
SE9500926L (en) | 1995-09-17 |
FI98839B (en) | 1997-05-15 |
FI941229A0 (en) | 1994-03-16 |
SE9500926D0 (en) | 1995-03-16 |
SE511743C2 (en) | 1999-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
GB | Transfer or assigment of application |
Owner name: AHLSTROM MACHINERY OY |
|
BB | Publication of examined application |