DE559405C - Process for the production of finely divided wood pulp - Google Patents

Process for the production of finely divided wood pulp

Info

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
Application number
DEK106003D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ARTHUR ST KLEIN DIPL ING DR
Original Assignee
ARTHUR ST KLEIN DIPL ING DR
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ARTHUR ST KLEIN DIPL ING DR filed Critical ARTHUR ST KLEIN DIPL ING DR
Priority to DEK106003D priority Critical patent/DE559405C/en
Application granted granted Critical
Publication of DE559405C publication Critical patent/DE559405C/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21BFIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00Fibrous raw materials or their mechanical treatment
    • D21B1/04Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30Defibrating by other means
    • D21B1/36Explosive 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)

PATENTANSPRUCH Verfahren zur Herstellung , von fein zerteiltem Holzzellstoff, dadurch gekennzeichnet, daß die mit oder ohne Zusatz von aufschließenden Chemikalien einem mindestens io atü betragenden Dampf-oder Gasdruck ausgesetzten Zellstoffasern plötzlich von dem Dampf- oder Gasdruck vollständig entlastet werden.PATENT CLAIM Process for the production of finely divided wood pulp, characterized in that the with or without the addition of digesting chemicals pulp fibers exposed to at least 10 atmospheres of steam or gas pressure suddenly be completely relieved of the steam or gas pressure.
DEK106003D 1927-09-23 1927-09-23 Process for the production of finely divided wood pulp Expired DE559405C (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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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