AT45765B - Process for the preparation of cellulose formate. - Google Patents

Process for the preparation of cellulose formate.

Info

Publication number
AT45765B
AT45765B AT45765DA AT45765B AT 45765 B AT45765 B AT 45765B AT 45765D A AT45765D A AT 45765DA AT 45765 B AT45765 B AT 45765B
Authority
AT
Austria
Prior art keywords
cellulose
preparation
cellulose formate
formic acid
formate
Prior art date
Application number
Other languages
German (de)
Original Assignee
Nitritfabrik Ag
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 Nitritfabrik Ag filed Critical Nitritfabrik Ag
Application granted granted Critical
Publication of AT45765B publication Critical patent/AT45765B/en

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  • Processes Of Treating Macromolecular Substances (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Description

  

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Claims (1)

PATENT-ANSPRÜCHE : 1. Verfahren zur Darstellung von Zelluloseformiat, dadurch gekennzeichnet, dass man Zellulose zunächst einer Vorbehandlung durch Auflösen in hinreichend starker Schwefelsäure EMI2.1 PATENT CLAIMS: 1. Process for the preparation of cellulose formate, characterized in that cellulose is first subjected to a pretreatment by dissolving it in sufficiently strong sulfuric acid EMI2.1 2. Verfahren nach Anspruch l zur Darstellung von Zelluloseformiat, dadurch gekennzeichnet, dass man für die Vorbehandlung nach Anspruch 1 statt Schwefelsäure Chlorzink gemeinsam mit Ameisensäure anwendet, wonach man dann aus der erzielten Lösung die Zellulose ausfällt, mit Wasser auswäscht und nach dem Trocknen in Ameisensäure auflöst. 2. The method according to claim l for the preparation of cellulose formate, characterized in that for the pretreatment according to claim 1 instead of sulfuric acid, zinc chloride is used together with formic acid, after which the cellulose is precipitated from the solution obtained, washed with water and dried in formic acid dissolves. 3. Verfahren zur Darstellung von technisch verwendbaren Zelluloseformiatlösungen nach Anspruch 2, dadurch gekennzeichnet, dass man die Umwandlung der Zellulose in Zelluloseformiat mittels Chlorzink und konzentrierter Ameisensäure bewirkt und ein Ausfällen des Zelluloseformiats, ein Auswaschen und nochmaliges Wiederauflösen in Ameisensäure vermeidet. 3. A method for the preparation of technically usable cellulose formate solutions according to claim 2, characterized in that the conversion of the cellulose into cellulose formate by means of zinc chloride and concentrated formic acid is effected and precipitation of the cellulose formate, washing out and repeated redissolution in formic acid is avoided.
AT45765D 1909-07-19 1909-07-19 Process for the preparation of cellulose formate. AT45765B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT45765T 1909-07-19

Publications (1)

Publication Number Publication Date
AT45765B true AT45765B (en) 1911-01-10

Family

ID=3565716

Family Applications (1)

Application Number Title Priority Date Filing Date
AT45765D AT45765B (en) 1909-07-19 1909-07-19 Process for the preparation of cellulose formate.

Country Status (1)

Country Link
AT (1) AT45765B (en)

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