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
Links
- 238000000034 method Methods 0.000 title claims description 6
- 229920002678 cellulose Polymers 0.000 title claims description 5
- 239000001913 cellulose Substances 0.000 title claims description 5
- 238000002360 preparation method Methods 0.000 title claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 150000007513 acids Chemical class 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000004090 dissolution Methods 0.000 claims 1
- -1 organic acid esters Chemical class 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- SMEGJBVQLJJKKX-HOTMZDKISA-N [(2R,3S,4S,5R,6R)-5-acetyloxy-3,4,6-trihydroxyoxan-2-yl]methyl acetate Chemical compound CC(=O)OC[C@@H]1[C@H]([C@@H]([C@H]([C@@H](O1)O)OC(=O)C)O)O SMEGJBVQLJJKKX-HOTMZDKISA-N 0.000 description 2
- 229960000583 acetic acid Drugs 0.000 description 2
- 229940081735 acetylcellulose Drugs 0.000 description 2
- 229920002301 cellulose acetate Polymers 0.000 description 2
- 239000012362 glacial acetic acid Substances 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- 229920002160 Celluloid Polymers 0.000 description 1
- GPZPVAIBXPRLFD-UHFFFAOYSA-N acetic acid;azane Chemical compound N.N.CC(O)=O GPZPVAIBXPRLFD-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Polysaccharides And Polysaccharide Derivatives (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Darstellung haltbarer Zellulosederivate und deren Lösungen.
EMI1.1
<Desc/Clms Page number 2>
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.
<Desc / Clms Page number 1>
Process for the preparation of durable cellulose derivatives and their solutions.
EMI1.1
<Desc / Clms Page number 2>
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)
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) |
-
1907
- 1907-05-06 AT AT36126D patent/AT36126B/en active
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