FR2367860A1 - Procede de preparation de pate de bois - Google Patents
Procede de preparation de pate de boisInfo
- Publication number
- FR2367860A1 FR2367860A1 FR7730951A FR7730951A FR2367860A1 FR 2367860 A1 FR2367860 A1 FR 2367860A1 FR 7730951 A FR7730951 A FR 7730951A FR 7730951 A FR7730951 A FR 7730951A FR 2367860 A1 FR2367860 A1 FR 2367860A1
- Authority
- FR
- France
- Prior art keywords
- shavings
- single stage
- pulper
- wood
- wood pulp
- 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.)
- Withdrawn
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
Procédé de préparation de pâte de bois. On met en pâte des copeaux de bois au cours d'un seul stade dans une machine de mise en pâte thermomécanique. On introduit un agent de blanchiment dans la machine de mise en pâte therpomécanique pour blanchir le bois au cours de la mise en pâte. Lorsque la machine de mise en pâte thermomécanique est un raffineur à double disque, on introduit l'agent de blanchiment, de préférence une solution aqueuse d'eau oxygénée, par une entrée de façon qu'elle entre en contact avec les copeaux de bois au centre du raffineur. Application à la fabrication du papier et de produits hygiéniques absorbants à jeter après usage.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4287876A GB1569264A (en) | 1976-10-15 | 1976-10-15 | Circuit for the visual monitoring of voltage |
GB250177A GB1588140A (en) | 1977-01-21 | 1977-01-21 | Method of preparing bleached pulp |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2367860A1 true FR2367860A1 (fr) | 1978-05-12 |
Family
ID=26237559
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7730951A Withdrawn FR2367860A1 (fr) | 1976-10-15 | 1977-10-14 | Procede de preparation de pate de bois |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2367860A1 (fr) |
SE (1) | SE7711552L (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2371544A1 (fr) * | 1976-11-23 | 1978-06-16 | Defibrator Ab | Procede et appareil pour la production continue de pulpe a partir de matieres fibreuses en cellulose de bois |
EP0333398A2 (fr) * | 1988-03-16 | 1989-09-20 | Morton International, Inc. | Procédé de blanchiment de pâte de bois mécanique |
-
1977
- 1977-10-13 SE SE7711552A patent/SE7711552L/xx unknown
- 1977-10-14 FR FR7730951A patent/FR2367860A1/fr not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2371544A1 (fr) * | 1976-11-23 | 1978-06-16 | Defibrator Ab | Procede et appareil pour la production continue de pulpe a partir de matieres fibreuses en cellulose de bois |
EP0333398A2 (fr) * | 1988-03-16 | 1989-09-20 | Morton International, Inc. | Procédé de blanchiment de pâte de bois mécanique |
US5129987A (en) * | 1988-03-16 | 1992-07-14 | Morton Thiokol, Inc. | Process for bleaching mechanical wood pulp with sodium hydrosulfite and sodium hydroxide in a refiner |
Also Published As
Publication number | Publication date |
---|---|
SE7711552L (sv) | 1978-04-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |