SE0003874D0 - Method and apparatus for streamlining the pulping process - Google Patents
Method and apparatus for streamlining the pulping processInfo
- Publication number
- SE0003874D0 SE0003874D0 SE0003874A SE0003874A SE0003874D0 SE 0003874 D0 SE0003874 D0 SE 0003874D0 SE 0003874 A SE0003874 A SE 0003874A SE 0003874 A SE0003874 A SE 0003874A SE 0003874 D0 SE0003874 D0 SE 0003874D0
- Authority
- SE
- Sweden
- Prior art keywords
- filtrate
- vessel
- mixture
- soap
- pulping process
- 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
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
A mixture (20) of the separated soap and some of the filtrate from the filtrate vessel (14) is altered to a temperature of 10-80 deg.C before separating the soap from this mixture, and then the remaining filtrate is returned to the filtrate vessel. A method for improving an alkali pulping process comprises supplying some of the filtrate (12) from the pulp washing step (8) to a filtrate vessel, where soap is separated from the filtrate before the latter is returned to the pulping process (2, 4). A mixture of the separated soap and some of the filtrate from the filtrate vessel is altered to a temperature of 10-80 deg.C before separating the soap from this mixture, and then the remaining filtrate is returned to the filtrate vessel. An Independent claim is also included for the apparatus used, which includes a heat exchanger (18) between the filtrate vessel and a vessel (22) for the soap/filtrate mixture, which is used to control the temperature of the mixture.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI992303A FI19992303A (en) | 1999-06-18 | 1999-10-25 | Process and plant for improved pulp production process |
Publications (3)
Publication Number | Publication Date |
---|---|
SE0003874D0 true SE0003874D0 (en) | 2000-10-25 |
SE0003874L SE0003874L (en) | 2001-04-26 |
SE519342C2 SE519342C2 (en) | 2003-02-18 |
Family
ID=8555498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE0003874A SE519342C2 (en) | 1999-10-25 | 2000-10-25 | Pulping process with recirculation of filtrate from washing step, involves temperature conditioning the mixture of soap and filtrate before separating the soap from the filtrate |
Country Status (1)
Country | Link |
---|---|
SE (1) | SE519342C2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI115977B2 (en) * | 2003-04-07 | 2019-03-29 | Stora Enso Oyj | Purification of alkaline washing liquid |
-
2000
- 2000-10-25 SE SE0003874A patent/SE519342C2/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE519342C2 (en) | 2003-02-18 |
SE0003874L (en) | 2001-04-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |