AT53099B - Process for the preparation of viscous solutions of acetyl cellulose. - Google Patents

Process for the preparation of viscous solutions of acetyl cellulose.

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Publication number
AT53099B
AT53099B AT53099DA AT53099B AT 53099 B AT53099 B AT 53099B AT 53099D A AT53099D A AT 53099DA AT 53099 B AT53099 B AT 53099B
Authority
AT
Austria
Prior art keywords
acetyl cellulose
preparation
viscous solutions
viscous
desc
Prior art date
Application number
Other languages
German (de)
Inventor
Alfred Dr Wohl
Original Assignee
Alfred Dr Wohl
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.)
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Publication date
Application filed by Alfred Dr Wohl filed Critical Alfred Dr Wohl
Application granted granted Critical
Publication of AT53099B publication Critical patent/AT53099B/en

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  • Polysaccharides And Polysaccharide Derivatives (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung viskoser Lösungen von Azetylzellulose. 



   Die Azetylzellulose löst sich bekanntermassen leicht in Chloroform und Azeton, nicht aber in Essigsäureäthylester. Es wurde nun gefunden, dass dieselbe in Ameisensäuremethylester ausserordentlich reichlich zu einer viskosen Lösung aufgenommen wird, aus der das Produkt durch Verdunsten in zusammenhängenden Films leicht erhältlich ist. 



   Die leichte Verdunstung des Ameisensäuremethylesters ist dabei noch ein besonderer   Vorteil. Weniger   reichlich, aber immer noch weitaus löslicher als in Essigsäureester oder l tern höherer Säuren ist die Azetylzellulose in Ameisensäureäthylester. Natürlich können auch andere Azetylzellulose lösende oder quellende Bestandteile zugegeben werden. 

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



   <Desc / Clms Page number 1>
 



  Process for the preparation of viscous solutions of acetyl cellulose.



   As is known, acetyl cellulose dissolves easily in chloroform and acetone, but not in ethyl acetate. It has now been found that the same is extremely abundantly taken up in methyl formate to form a viscous solution from which the product can easily be obtained by evaporation in a coherent film.



   The easy evaporation of the methyl formate is a particular advantage. Acetyl cellulose in ethyl formate is less abundant, but still far more soluble than in acetic acid ester or in higher acids. Of course, other acetyl cellulose-dissolving or swelling components can also be added.

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

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung viskoser Lösungen von Azetylzellulose, gekennzeichnet durch die Verwendung von Ameisensäureäthylester oder Ameisensäuremethylester als alleiniges Lösungsmittel oder gemeinsam mit anderen bekannten Lösungsmitteln. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the preparation of viscous solutions of acetyl cellulose, characterized by the use of ethyl formate or methyl formate as the sole solvent or together with other known solvents. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT53099D 1910-03-12 1911-01-14 Process for the preparation of viscous solutions of acetyl cellulose. AT53099B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE53099X 1910-03-12

Publications (1)

Publication Number Publication Date
AT53099B true AT53099B (en) 1912-04-10

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ID=5627525

Family Applications (1)

Application Number Title Priority Date Filing Date
AT53099D AT53099B (en) 1910-03-12 1911-01-14 Process for the preparation of viscous solutions of acetyl cellulose.

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AT (1) AT53099B (en)

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