CH108938A - Process for the pretreatment of raw materials for the production of cellulose, textile fibers and their intermediate products. - Google Patents
Process for the pretreatment of raw materials for the production of cellulose, textile fibers and their intermediate products.Info
- Publication number
- CH108938A CH108938A CH108938DA CH108938A CH 108938 A CH108938 A CH 108938A CH 108938D A CH108938D A CH 108938DA CH 108938 A CH108938 A CH 108938A
- Authority
- CH
- Switzerland
- Prior art keywords
- raw materials
- cellulose
- production
- pretreatment
- intermediate products
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
Landscapes
- Paper (AREA)
Description
Verfahren zur Vorbehandlung von Rohstoffen zur Herstellung von Zellstoff, Textilfasern und deren Zwischenprodukten. Bekannt ist, dass man eine Erleichterung des Aufschliessens, zum Beispiel von Torf, dadurch erzielen kann, dass man den Torf längere Zeit einer natürlichen oder künst lichen Erhitzung aussetzt oder Kälte auf denselben einwirken lässt. So ist unter an derem ein Verfahren zur- Aufbereitung von Torf zur Gewinnung von Spinnstoff und Pappe bekannt, welches Verfahren darin be steht, dass das im Zellinnern enthaltene Wasser der durch Waschen von den bei gemengten, in der Erhitzung koagulierenden Stoffen vollständig befreiten Fasern durch plötzliches Erhitzen zur Ausdehnung ge bracht wird.
Dieses Verfahren betrifft ledig lich die Sprengung der Zellwände.
Gegenstand vorliegender Erfindung ist nun ein Verfahren zur Vorbehandlung von Rohstoffen zur Herstellung von Zellstoff und Textilfasern und deren Zwischenproduk ten, gemäss welchem Verfahren die Rohstoffe erst einem der jeweiligen Eigenart des Roh stoffes entsprechenden chemischen Bade prozess unterworfen werden, und dass man anschliessend daran die so- gebadeten Roh- stoffe einer von der gewöhnlichen Tempera tur abweichenden Temperatur, zum Beispiel der Hitze oder der gälte; aussetzt. Durch diese doppelte Einwirkung auf die Rohstoffe wird eine weitgehende Aufschliessung er reicht, weil nicht nur eine thermische, son dern auch eine chemische Einwirkung statt findet.
Als Rohstoffe kann man Holz, Torf, Stroh, Schilf und andere Faserstoffe ver wenden.
Beispiel: Stroh wird sechs bis acht Stunden in einer Lauge eingeweicht. Diese Lauge ist Abfallauge, herrührend aus dem A.ufschlie- ssungsprozess für Zellulose mit zum Beispiel 4 % Natrongehalt, wovon 3 % durch Auf schliessung aufgebraucht sind, so dass nur noch 1 % Natrongehalt in der Lauge vor handen ist. Nach Absonderung der Lösung wird das Gut in einer Transportschnecke auf<B>80'</B> C erhitzt.
Durch diesen Hitzeprozess erfolgt eine teilweise Aufschliessung des Gutes und wird eine Vorarbeit geleistet, die in wirtschaftlicher Hinsicht eine wesent liche Vorbehandlung der Rohstoffe zur Her- stellunb von Zellstoff- und Textilfasern und deren Zwischenprodukte darstellt.
Statt eines alkalischen Bades bann man auch alkalische Chlorbäder oder Chlor in Gasform verwenden.
Das Verfahren kann in den meisten Fällen ohne irgend welche Auswaschung der Rohstoffe begonnen werden.
Process for the pretreatment of raw materials for the production of cellulose, textile fibers and their intermediate products. It is known that the breaking up of peat, for example, can be made easier by exposing the peat to natural or artificial heating for a longer period of time, or by letting the peat act on the same. Thus, among other things, a method for processing peat for the production of textile material and cardboard is known, which method is that the water contained in the cell interior of the fibers, completely freed by washing from the substances coagulating in the heating, completely freed by washing Heating is brought to expansion.
This procedure only affects the rupture of the cell walls.
The present invention now relates to a process for the pretreatment of raw materials for the production of cellulose and textile fibers and their intermediate products, according to which process the raw materials are first subjected to a chemical bathing process corresponding to the respective nature of the raw material, and then the so- bathed raw materials at a temperature deviating from the usual temperature, for example heat or cold; suspends. This double action on the raw materials means that extensive decomposition is achieved because there is not only a thermal, but also a chemical action.
Wood, peat, straw, reeds and other fibers can be used as raw materials.
Example: Straw is soaked in a lye for six to eight hours. This lye is waste eye, originating from the digestion process for cellulose with, for example, 4% sodium content, of which 3% is used up through digestion, so that only 1% sodium content is left in the lye. After separating the solution, the material is heated to <B> 80 '</B> C in a transport screw.
As a result of this heat process, the goods are partially broken down and preliminary work is carried out which, from an economic point of view, represents an essential pretreatment of the raw materials for the production of cellulose and textile fibers and their intermediate products.
Instead of an alkaline bath, you can also use alkaline chlorine baths or chlorine in gaseous form.
In most cases the process can be started without any leaching of the raw materials.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH108938T | 1923-10-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH108938A true CH108938A (en) | 1925-02-16 |
Family
ID=4367939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH108938D CH108938A (en) | 1923-10-29 | 1923-10-29 | Process for the pretreatment of raw materials for the production of cellulose, textile fibers and their intermediate products. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH108938A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1034967B (en) * | 1954-01-07 | 1958-07-24 | Der Maschinenfabrik Von Theodo | Continuous process and device for the production of semi-pulp from wood |
-
1923
- 1923-10-29 CH CH108938D patent/CH108938A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1034967B (en) * | 1954-01-07 | 1958-07-24 | Der Maschinenfabrik Von Theodo | Continuous process and device for the production of semi-pulp from wood |
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