FI954231A0 - Process for the preparation of chemomechanical and / or chemothermomechanical wood pulp - Google Patents
Process for the preparation of chemomechanical and / or chemothermomechanical wood pulpInfo
- Publication number
- FI954231A0 FI954231A0 FI954231A FI954231A FI954231A0 FI 954231 A0 FI954231 A0 FI 954231A0 FI 954231 A FI954231 A FI 954231A FI 954231 A FI954231 A FI 954231A FI 954231 A0 FI954231 A0 FI 954231A0
- Authority
- FI
- Finland
- Prior art keywords
- raw materials
- chemomechanical
- wood
- preparation
- chemothermomechanical
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/14—Disintegrating in mills
- D21B1/16—Disintegrating in mills in the presence of chemical 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
- D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Paper (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
- Processing Of Solid Wastes (AREA)
- Macromonomer-Based Addition Polymer (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Abstract
A process is disclosed for producing chemomechanical and/or chemothermomechanical wood products from lignocellulosic raw materials, such as wood chips. The raw materials are impregnated with a SO2-containing solution and then subjected to a sulfonating reaction in a gaseous or vapour phase at a pH value equal to 2 or less. When the sulfonating reaction is finished, the raw materials or wood chips are defibrated in a defibrating unit known per se and are crushed down to a preselected fineness degree. The wood product thus obtained is characterized by remarkable solidity and by requiring a reduced specific crushing energy.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4307660A DE4307660C1 (en) | 1993-03-11 | 1993-03-11 | Manufacture of chemo-mechanical and / or chemo-thermo-mechanical wood materials |
PCT/EP1994/000627 WO1994020670A1 (en) | 1993-03-11 | 1994-03-03 | Process for producing chemomechanical and/or chemothermomechanical wood products |
Publications (2)
Publication Number | Publication Date |
---|---|
FI954231A0 true FI954231A0 (en) | 1995-09-08 |
FI954231A FI954231A (en) | 1995-09-08 |
Family
ID=6482482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI954231A FI954231A (en) | 1993-03-11 | 1995-09-08 | Process for the preparation of chemomechanical and / or chemothermomechanical wood pulp |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0688373B1 (en) |
JP (1) | JPH08507333A (en) |
AT (1) | ATE144011T1 (en) |
CA (1) | CA2157886A1 (en) |
DE (2) | DE4307660C1 (en) |
DK (1) | DK0688373T3 (en) |
ES (1) | ES2095755T3 (en) |
FI (1) | FI954231A (en) |
NO (1) | NO953389L (en) |
WO (1) | WO1994020670A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009057208A1 (en) * | 2009-11-27 | 2011-06-01 | Technische Universität Dresden | Process for the production of lignocellulosic paper pulps and papers, cartons and boards derived therefrom |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1064567A (en) * | 1963-05-21 | 1967-04-05 | Depibrator Aktiebolag | Method in the manufacture of chemo-mechanical pulps by heating and defibrating in a vapour atmosphere under pressure and at increased temperature of wood chips impregnated with sulphite solution |
DE2445523A1 (en) * | 1974-09-24 | 1976-04-01 | Waldhof Aschaffenburg Papier | METHOD FOR MANUFACTURING PULP |
SE404044B (en) * | 1975-11-13 | 1978-09-18 | Mo Och Domsjoe Ab | LIGHT ABSORBING LIGNIRIK HOGUTYTESCELLULOSAMASSA AND PROCEDURES FOR THE PREPARATION OF THIS |
US4211605A (en) * | 1978-08-03 | 1980-07-08 | Canadian International Paper Company | High yield chemimechanical pulping processes |
US4634499A (en) * | 1983-05-02 | 1987-01-06 | The Procter & Gamble Company | Sulfite process for making pulp having a tactile softness from hardwood chips |
DE3932347A1 (en) * | 1989-09-28 | 1991-04-11 | Feldmuehle Ag | PRODUCTION OF CHEMO-MECHANICAL AND / OR CHEMO-THERMO-MECHANICAL WOODEN MATERIALS |
SE9002039D0 (en) * | 1990-06-07 | 1990-06-07 | Svenska Traeforskningsinst | SAVE TO PREPARE |
-
1993
- 1993-03-11 DE DE4307660A patent/DE4307660C1/en not_active Expired - Fee Related
-
1994
- 1994-03-03 AT AT94910362T patent/ATE144011T1/en not_active IP Right Cessation
- 1994-03-03 ES ES94910362T patent/ES2095755T3/en not_active Expired - Lifetime
- 1994-03-03 WO PCT/EP1994/000627 patent/WO1994020670A1/en active IP Right Grant
- 1994-03-03 JP JP6519572A patent/JPH08507333A/en active Pending
- 1994-03-03 EP EP94910362A patent/EP0688373B1/en not_active Expired - Lifetime
- 1994-03-03 DE DE59400830T patent/DE59400830D1/en not_active Expired - Fee Related
- 1994-03-03 CA CA002157886A patent/CA2157886A1/en not_active Abandoned
- 1994-03-03 DK DK94910362.6T patent/DK0688373T3/en active
-
1995
- 1995-08-29 NO NO953389A patent/NO953389L/en not_active Application Discontinuation
- 1995-09-08 FI FI954231A patent/FI954231A/en unknown
Also Published As
Publication number | Publication date |
---|---|
JPH08507333A (en) | 1996-08-06 |
CA2157886A1 (en) | 1994-09-15 |
NO953389D0 (en) | 1995-08-29 |
DE4307660C1 (en) | 1994-08-04 |
NO953389L (en) | 1995-08-29 |
EP0688373B1 (en) | 1996-10-09 |
FI954231A (en) | 1995-09-08 |
DK0688373T3 (en) | 1997-03-24 |
ATE144011T1 (en) | 1996-10-15 |
WO1994020670A1 (en) | 1994-09-15 |
DE59400830D1 (en) | 1996-11-14 |
EP0688373A1 (en) | 1995-12-27 |
ES2095755T3 (en) | 1997-02-16 |
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