AT87646B - Process for the preparation of cellulose derivatives. - Google Patents

Process for the preparation of cellulose derivatives.

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Publication number
AT87646B
AT87646B AT87646DA AT87646B AT 87646 B AT87646 B AT 87646B AT 87646D A AT87646D A AT 87646DA AT 87646 B AT87646 B AT 87646B
Authority
AT
Austria
Prior art keywords
cellulose
preparation
cellulose derivatives
thionyl chloride
derivatives
Prior art date
Application number
Other languages
German (de)
Inventor
Richard Dr Wolffenstein
Arthur Dr Marcuse
Original Assignee
Richard Dr Wolffenstein
Arthur Dr Marcuse
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 Richard Dr Wolffenstein, Arthur Dr Marcuse filed Critical Richard Dr Wolffenstein
Application granted granted Critical
Publication of AT87646B publication Critical patent/AT87646B/en

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  • Polysaccharides And Polysaccharide Derivatives (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung von   Zelluloseabkömmlingen.   



   Zellulose wird bekanntlich durch Wasser leicht benetzt. Es hat sich nun unerwarteterweise gezeigt, dass Thionylchlorid eine ganz besondere Wirkung auf die Zellulose dadurch ausübt, dass die Zellulose hierdurch in einen Zustand versetzt wird, wodurch die Benetzung bedeutend erschwert bzw. verhindert wird, so dass man auf diese Weise Zellulose wasser dicht machen kann. Zur Ausführung des Verfahrens kann man z. B. Zellulose oder Zelluloseabkömmlinge durch eine etwa   io"/oige   Thionylchloridlösung in Benzol ziehen. In solcherWeise behandeltes, vorher stark wasseraufsaugungsfähiges Papier stösst dann das Wasser so ab, als ob es von einer dünnen Fettschicht umgeben wäre, während aber tatsächlich kein Niederschlag auf der Zellulosefaser bemerkbar ist.

   Die Einwirkung des Thionylchlorids auf Zellulose ist höchstwahrscheinlich chemischer Natur, indem sich dadurch der Zellulose nahestehende, chemische Abkömmlinge bilden. 



   Die mit Thionylchlorid vorbehandelte Zellulose lässt sich mit Vorteil auch in die verschiedensten Zelluloseverbindungen, z. B. in die Säureester, überführen. So wird der Acetylierungsprozess der mit Thionylchlorid vorbehandelten Zellulose gegenüber der Einwirkung von Essigsäureanhydrid auf nicht vorbehandelte Zellulose abgekürzt. Man kann naturgemäss 
 EMI1.1 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



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  Process for the preparation of cellulose derivatives.



   Cellulose is known to be easily wetted by water. It has now been shown, unexpectedly, that thionyl chloride has a very special effect on the cellulose in that the cellulose is thereby put into a state that makes wetting significantly more difficult or prevented, so that cellulose can be made waterproof in this way . To carry out the method you can, for. B. draw cellulose or cellulose derivatives through an approximately 10% thionyl chloride solution in benzene. In this way, previously highly water-absorbent paper then repels the water as if it were surrounded by a thin layer of fat, while in fact no precipitation on the cellulose fiber is noticeable.

   The action of thionyl chloride on cellulose is most likely of a chemical nature, in that it creates chemical derivatives that are close to cellulose.



   The cellulose pretreated with thionyl chloride can also be advantageously converted into a wide variety of cellulose compounds, e.g. B. in the acid esters. The acetylation process of cellulose pretreated with thionyl chloride is shortened compared to the action of acetic anhydride on cellulose that has not been pretreated. One can naturally
 EMI1.1
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung von Zelluloseabkömmlingen, dadurch gekennzeichnet, dass man Thionylchlorid auf Zellulose bzw. Zelluloseverbindungen einwirken lässt. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the preparation of cellulose derivatives, characterized in that thionyl chloride is allowed to act on cellulose or cellulose compounds. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT87646D 1914-05-29 1917-01-12 Process for the preparation of cellulose derivatives. AT87646B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE87646X 1914-05-29

Publications (1)

Publication Number Publication Date
AT87646B true AT87646B (en) 1922-03-10

Family

ID=5641839

Family Applications (1)

Application Number Title Priority Date Filing Date
AT87646D AT87646B (en) 1914-05-29 1917-01-12 Process for the preparation of cellulose derivatives.

Country Status (1)

Country Link
AT (1) AT87646B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442611A (en) * 1945-12-21 1948-06-01 Edwards And Company Inc Audible electric signaling mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442611A (en) * 1945-12-21 1948-06-01 Edwards And Company Inc Audible electric signaling mechanism

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