DE559405C - Process for the production of finely divided wood pulp - Google Patents
Process for the production of finely divided wood pulpInfo
- Publication number
- DE559405C DE559405C DEK106003D DEK0106003D DE559405C DE 559405 C DE559405 C DE 559405C DE K106003 D DEK106003 D DE K106003D DE K0106003 D DEK0106003 D DE K0106003D DE 559405 C DE559405 C DE 559405C
- Authority
- DE
- Germany
- Prior art keywords
- wood pulp
- production
- finely divided
- divided wood
- steam
- 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.)
- Expired
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
- D21B1/30—Defibrating by other means
- D21B1/36—Explosive disintegration by sudden pressure reduction
Description
Verfahren zur Herstellung von fein zerteiltem Holzzellstoff Es ist an sich bekannt, ligninhaltige und andere Faserstoffe mit oder ohne Zusatz von Chemikalien in einem geschlossenen Gefäße einem hohen Dampfdruck zu unterwerfen und dann den Dampfdruck durch enge Auslässe ausströmen zu lassen. Es ist weiter bekannt, Holzzellstoffe durch Mahlen im Holländer, durch Kollern oder auf andere `'eise so zu verändern, daß die Faser für Spezialzwecke sich besonders eignet.Process for making finely divided wood pulp It is known per se, lignin-containing and other fibrous materials with or without the addition of chemicals to subject it to a high vapor pressure in a closed vessel and then the Let vapor pressure escape through narrow outlets. It is also known to be wood pulp by grinding in the Hollander, by peeling or in some other way to change that the fiber is particularly suitable for special purposes.
Es hat sich nun gezeigt, daß kraftsparend eine Vergrößerung der Oberfläche des Zellstoffes sowohl im ungebleichten wie im gebleichten Zustande durch Zerreißen, Zertrümniern und ähnliche Vorgänge erreicht werden kann, wodurch die Verwendung der Holzzellstoffe für Spezialzwecke erleichtert und verbessert, die Adsorption der Fasern erhöht und der Eintritt und Verlauf von chemischen Reaktionen beschleunigt und unterstützt-wird. Das kann erreicht -werden, indem man die Holzzellstoffasern einem hohen, mindestens io atü betragenden Dampfdrucke oder Gasdrucke aussetzt und nachher diesen Druck plötzlich völlig heruntersetzt, indem man den hohen Dampf- oder Gasdruck plötzlich vollkommen entweichen läßt, anstatt ihn, wie früher, durch enge Auslässe ausströmen zu lassen. Es wird dabei, z. B. durch den Druck des Dampfes, der die Hohlräume der Zellstoffasern ausfüllt, bei plötzlicher Entspannung oder Druckminderung zufolge der raschen Ausdehnung des Dampfes die Faser zertrümmert bzw. weitgehend zerrissen. Diese Vorgänge können durch Zusatz .von Chemikalien, die die Quellung fördern, z. B. Laugen, basische Salzlösungen usw., beschleunigt bzw. unterstützt werden.It has now been shown that an increase in the surface area saves effort of the pulp both in the unbleached and in the bleached state by tearing, Smashing and similar operations can be achieved, eliminating the use The special purpose wood pulp facilitates and improves adsorption of fibers increases and the onset and course of chemical reactions accelerated and is supported. This can be achieved by using the wood pulp fibers exposed to high vapor pressures or gas pressures of at least 10 atmospheres and then suddenly reduce this pressure completely by removing the high steam or gas pressure suddenly escapes completely instead of it, as before, through to allow narrow outlets to flow out. It will be, for. B. by the pressure of the steam, which fills the cavities of the cellulose fibers, in the event of sudden relaxation or Pressure reduction due to the rapid expansion of the steam shattered the fiber or largely torn. These processes can be prevented by adding chemicals, which promote swelling, e.g. B. alkalis, basic salt solutions, etc., accelerated or are supported.
Derartig behandelte ungebleichte Holzzellstoffe können in üblicher Weise gebleicht werden. Durch Verwendung derartig behandelter ungebleichter oder auch gebleichter Holzzellstoffe können vorteilhaft Spezialpapiere, die besonders saug- oder druckfähig sind, aber auch solche, die hydratisierten Zellstoff (Zellstoffschleim) enthalten, sowie Lösungen und Verbindungen von Cellulose oder Cellulosederivaten hergestellt werden.Unbleached wood pulps treated in this way can be used in conventional Way to be bleached. By using such treated unbleached or Bleached wood pulp can also be beneficial for specialty papers that are particularly good absorbent or compressible, but also those that contain hydrated pulp (pulp slime) contain, as well as solutions and compounds of cellulose or cellulose derivatives getting produced.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK106003D DE559405C (en) | 1927-09-23 | 1927-09-23 | Process for the production of finely divided wood pulp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK106003D DE559405C (en) | 1927-09-23 | 1927-09-23 | Process for the production of finely divided wood pulp |
Publications (1)
Publication Number | Publication Date |
---|---|
DE559405C true DE559405C (en) | 1932-09-20 |
Family
ID=7240820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK106003D Expired DE559405C (en) | 1927-09-23 | 1927-09-23 | Process for the production of finely divided wood pulp |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE559405C (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE750759C (en) * | 1937-07-30 | 1945-01-29 | Schlesische Zellwolle Ag | Process for the production of artificial structures from viscose |
US2673148A (en) * | 1950-10-04 | 1954-03-23 | Hercules Powder Co Ltd | Alkaline pulping using gaseous oxygen |
DE1063450B (en) * | 1956-05-11 | 1959-08-13 | Bauer Bros Company | Method and device for the preparation of wood chips or similar cellulose-containing raw materials for the purpose of obtaining semi-cellulose or cellulose |
FR2544222A1 (en) * | 1983-04-13 | 1984-10-19 | Fanjat De Saint Font Andre | Method for fragmenting or defibring permeable porous materials |
US6413362B1 (en) | 1999-11-24 | 2002-07-02 | Kimberly-Clark Worldwide, Inc. | Method of steam treating low yield papermaking fibers to produce a permanent curl |
US6506282B2 (en) | 1998-12-30 | 2003-01-14 | Kimberly-Clark Worldwide, Inc. | Steam explosion treatment with addition of chemicals |
-
1927
- 1927-09-23 DE DEK106003D patent/DE559405C/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE750759C (en) * | 1937-07-30 | 1945-01-29 | Schlesische Zellwolle Ag | Process for the production of artificial structures from viscose |
US2673148A (en) * | 1950-10-04 | 1954-03-23 | Hercules Powder Co Ltd | Alkaline pulping using gaseous oxygen |
DE1063450B (en) * | 1956-05-11 | 1959-08-13 | Bauer Bros Company | Method and device for the preparation of wood chips or similar cellulose-containing raw materials for the purpose of obtaining semi-cellulose or cellulose |
FR2544222A1 (en) * | 1983-04-13 | 1984-10-19 | Fanjat De Saint Font Andre | Method for fragmenting or defibring permeable porous materials |
US6506282B2 (en) | 1998-12-30 | 2003-01-14 | Kimberly-Clark Worldwide, Inc. | Steam explosion treatment with addition of chemicals |
US6413362B1 (en) | 1999-11-24 | 2002-07-02 | Kimberly-Clark Worldwide, Inc. | Method of steam treating low yield papermaking fibers to produce a permanent curl |
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