FI955007A - Method and apparatus for pulp handling - Google Patents
Method and apparatus for pulp handling Download PDFInfo
- Publication number
- FI955007A FI955007A FI955007A FI955007A FI955007A FI 955007 A FI955007 A FI 955007A FI 955007 A FI955007 A FI 955007A FI 955007 A FI955007 A FI 955007A FI 955007 A FI955007 A FI 955007A
- Authority
- FI
- Finland
- Prior art keywords
- pulp
- treatment
- degrees celsius
- reduce
- acid
- Prior art date
Links
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- Paper (AREA)
Abstract
The invention concerns a method for treatment of pulp in conjunction with bleaching. The pulp is first cooked and acid delignified as required to reduce its kappa number to below 24, preferably below 14 and then treated in an acid stage at a pH of 2-5 in the temperature range of 75-130 degrees Celsius to reduce its kappa number by 2 to 9 units. To prevent the pulp's strength value from being significantly reduced, the holding time in the treatment tower of the acid stage, t, min is 30-300 minutes and the treatment temperature T degrees Celsius Tmin < T < Tmax. The invention also refers to an apparatus system intended for use in the method.
Priority Applications (15)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI955007A FI102193B (en) | 1995-10-20 | 1995-10-20 | Method and apparatus for treating pulp |
FI955878A FI105701B (en) | 1995-10-20 | 1995-12-07 | Method and arrangement for treatment of pulp |
FI960214A FI104574B (en) | 1995-10-20 | 1996-01-07 | Method and apparatus for pulping |
BR9611258A BR9611258A (en) | 1995-10-20 | 1996-10-18 | High temperature acid pulp treatment in connection with bleaching |
ES96934841T ES2158355T3 (en) | 1995-10-20 | 1996-10-18 | ACID TREATMENT OF PAPER PASTE AT HIGH TEMPERATURE IN RELATION TO WHITENING. |
DE69613989T DE69613989D1 (en) | 1995-10-20 | 1996-10-18 | HIGH TEMPERATURE ACID TREATMENT OF FIBER WHILE BLEACHING |
PT96934841T PT856080E (en) | 1995-10-20 | 1996-10-18 | ACUTE TREATMENT OF HIGH TEMPERATURE PAPER PASTE IN COMBINATION WITH BLEACHING |
US09/051,678 US6306253B2 (en) | 1995-10-20 | 1996-10-18 | Acid treatment of pulp at high temperature prior to chlorine dioxide bleaching |
PCT/FI1996/000552 WO1997015713A1 (en) | 1995-10-20 | 1996-10-18 | Acid treatment of pulp at high temperature in connection with bleaching |
CA002235325A CA2235325C (en) | 1995-10-20 | 1996-10-18 | Acid treatment of pulp at high temperature in connection with bleaching |
AU73016/96A AU7301696A (en) | 1995-10-20 | 1996-10-18 | Acid treatment of pulp at high temperature in connection with bleaching |
EP96934841A EP0856080B1 (en) | 1995-10-20 | 1996-10-18 | Acid treatment of pulp at high temperature in connection with bleaching |
AT96934841T ATE203291T1 (en) | 1995-10-20 | 1996-10-18 | HIGH TEMPERATURE ACID TREATMENT OF PULP DURING BLEACHING |
ZA968823A ZA968823B (en) | 1995-10-20 | 1996-10-21 | Method and apparatus for treatment of pulp |
US09/793,652 US20010020521A1 (en) | 1995-10-20 | 2001-02-27 | Acid treatment of pulp at high temperature in connection with bleaching |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI955007A FI102193B (en) | 1995-10-20 | 1995-10-20 | Method and apparatus for treating pulp |
FI955007 | 1995-10-20 |
Publications (4)
Publication Number | Publication Date |
---|---|
FI955007A0 FI955007A0 (en) | 1995-10-20 |
FI955007A true FI955007A (en) | 1997-04-21 |
FI102193B1 FI102193B1 (en) | 1998-10-30 |
FI102193B FI102193B (en) | 1998-10-30 |
Family
ID=8544226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI955007A FI102193B (en) | 1995-10-20 | 1995-10-20 | Method and apparatus for treating pulp |
Country Status (2)
Country | Link |
---|---|
FI (1) | FI102193B (en) |
ZA (1) | ZA968823B (en) |
-
1995
- 1995-10-20 FI FI955007A patent/FI102193B/en active
-
1996
- 1996-10-21 ZA ZA968823A patent/ZA968823B/en unknown
Also Published As
Publication number | Publication date |
---|---|
FI102193B1 (en) | 1998-10-30 |
ZA968823B (en) | 1997-06-23 |
FI102193B (en) | 1998-10-30 |
FI955007A0 (en) | 1995-10-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
GB | Transfer or assigment of application |
Owner name: AHLSTROM MACHINERY OY |