AT36126B - Process for the preparation of durable cellulose derivatives and their solutions. - Google Patents

Process for the preparation of durable cellulose derivatives and their solutions.

Info

Publication number
AT36126B
AT36126B AT36126DA AT36126B AT 36126 B AT36126 B AT 36126B AT 36126D A AT36126D A AT 36126DA AT 36126 B AT36126 B AT 36126B
Authority
AT
Austria
Prior art keywords
solutions
preparation
cellulose derivatives
durable
durable cellulose
Prior art date
Application number
Other languages
German (de)
Original Assignee
Knoll & Co
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
Priority claimed from DE1906196730D external-priority patent/DE196730C/de
Application filed by Knoll & Co filed Critical Knoll & Co
Application granted granted Critical
Publication of AT36126B publication Critical patent/AT36126B/en

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  • Polysaccharides And Polysaccharide Derivatives (AREA)

Description

  

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  Verfahren zur Darstellung haltbarer Zellulosederivate und deren Lösungen. 
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   Das Verfahren möge durch folgendes Beispiel erläutert werden :
In eine in bekannter Weise mittels Schwefelsäure (z. B. durch Lösen von 1 Teil Zellulose in 4 Teilen Essigsäurcanhydrid und 4 Teilen Eisessig durch Einwirkung von 0, 1 Teil Schwefelsäure bei Zimmertemperatur nach dem Verfahren der deutschen Patentschrift Nr. 159524) hergestellte Lösung von Acetylzellulose wird, solange sie sich noch in einem gleichmässig dickflüssigen Zustande befindet, die zur Abstumpfung der Schwefelsäure erforderliche Menge feingepulverten Natriumacetates, beispielsweise 0.2 Teile, eventuell in wenig Eisessig gelöst, in kleinen Anteilen unter gutem Rühren eingetragen. 



   An Stelle des Natriumacetates kann auch die entsprechende enge Ammoniak Ammoniumacetat oder eine beliebige andere Base oder eines ihrer Salze mit schwachen Säuren benutzt werden. 



   Die Lösung wird eventuell filtriert und kann ohne Waschung und Umlösung der Acetylzellulose direkt auf Fäden, Films und Zelluloidmassen verarbeitet werden.



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  Process for the preparation of durable cellulose derivatives and their solutions.
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   The procedure should be explained by the following example:
In a solution of acetyl cellulose prepared in a known manner by means of sulfuric acid (e.g. by dissolving 1 part of cellulose in 4 parts of acetic anhydride and 4 parts of glacial acetic acid by the action of 0.1 part of sulfuric acid at room temperature according to the method of German Patent No. 159524) as long as it is still in a uniformly viscous state, the amount of finely powdered sodium acetate required to dull the sulfuric acid, for example 0.2 part, possibly dissolved in a little glacial acetic acid, is added in small portions with thorough stirring.



   Instead of the sodium acetate, the corresponding narrow ammonia ammonium acetate or any other base or one of its salts with weak acids can be used.



   The solution may be filtered and can be processed directly onto threads, films and celluloid masses without washing and dissolving the acetyl cellulose.

Claims (1)

PATENT. ANSPRUCH : Verfahren zur Darstellung haltbarer Zellulosederivate und deren Lösungen, dadurch gekennzeichnet, dass organische Säureester der Zellulose, welche mittels Kontaktsubstanzen mit schädlicher-Säurenachwirkung bereitet wurden, gleich nach dem Bildungs-oder Auf- lösungsprozess oder gleich nach der Verarbeitung primär erhaltener Lösungen zu Fäden oder Häuten mit geeigneten Basen oder deren Salzen mit schwachen Säuren behandelt worden. PATENT. CLAIM : Method for the preparation of durable cellulose derivatives and their solutions, characterized in that organic acid esters of cellulose, which have been prepared by means of contact substances with harmful acid aftereffects, immediately after the formation or dissolution process or immediately after the processing of primarily obtained solutions into threads or skins appropriate bases or their salts have been treated with weak acids.
AT36126D 1906-04-10 1907-05-06 Process for the preparation of durable cellulose derivatives and their solutions. AT36126B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1906196730D DE196730C (en) 1906-04-10

Publications (1)

Publication Number Publication Date
AT36126B true AT36126B (en) 1909-02-10

Family

ID=5755963

Family Applications (1)

Application Number Title Priority Date Filing Date
AT36126D AT36126B (en) 1906-04-10 1907-05-06 Process for the preparation of durable cellulose derivatives and their solutions.

Country Status (1)

Country Link
AT (1) AT36126B (en)

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