AT54819B - Process for the production of long-lasting, viscous cellulose solutions. - Google Patents
Process for the production of long-lasting, viscous cellulose solutions.Info
- Publication number
- AT54819B AT54819B AT54819DA AT54819B AT 54819 B AT54819 B AT 54819B AT 54819D A AT54819D A AT 54819DA AT 54819 B AT54819 B AT 54819B
- Authority
- AT
- Austria
- Prior art keywords
- lasting
- production
- long
- cellulose
- cellulose solutions
- Prior art date
Links
- 229920002678 cellulose Polymers 0.000 title claims 3
- 239000001913 cellulose Substances 0.000 title claims 3
- 230000005923 long-lasting effect Effects 0.000 title claims 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims 1
- 229920000297 Rayon Polymers 0.000 claims 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims 1
- 235000019253 formic acid Nutrition 0.000 claims 1
- -1 oxycellulose Polymers 0.000 claims 1
- 239000002964 rayon Substances 0.000 claims 1
- 239000002699 waste material Substances 0.000 claims 1
Landscapes
- Polysaccharides And Polysaccharide Derivatives (AREA)
Description
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Verfahren zur Herstellung von haltbaren, viskosen Zelluloselösungen.
Es ist bekannt, dass die bei der Kunstseidenfabrikation abfallenden Hydrate bestimmter Zusammensetzung sich in'Ameisensäure ohne Zusatz eines Kondensationsmittels nach einiger Zeit bei gewöhnlicher Temperatur unter Veresterung zu einer technisch wichtigen Lösung von Zeiluloseformiat in Ameisensäure verarbeiten lassen. Gewöhnlich gebleichte oder merzerisierte Zellulose löst sich unter diesen Verhältnissen nicht.
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weise unter Bildung neuer saurer Kmpl oxe.
Es ist auch bekannt, dass Essigsäure und Phosphorsäure geeignet sind, Lösungen von Zellulose zu bewirken.
Demgegenüber besitzt das Gemisch Phosphorsäure-Ameisensäure nicht nur den Vorteil grösserer Billigkeit, sondern die Lösung geht leicht schon in einigen 3tunden vor sich, indem die eingebrachten Kunstseidenabfälle gleichsam zerfliessen, ähnlich wie das Kolloid Gummiarabikum im Wasser zu Schleim aufquillt. Es liegt daher gegenüber der Verwendung von Essigsäure ein bedeutender technischer Fortschritt vor. Die höheren Fettsäuren vorhaben sich nicht gleich lösungsfördernd bzw. zersetzungshindernd, so dass das Verhalten der Ameisensäure als eigenartig aufzufassen ist.
Versetzt man eine Lösung von Abfällen der Kunstseidefabrikation gleichgiltig welcher Fabrikationsart, oder von Zellulosehydrat in Ameisensäuro bzw. eine Zelluloseformiatlösung mit Phosphorsäure, so tritt offenbar eine Deformylierung der gelösten veresterten Zellulosesubstanz ein, die Lösung wird viskoser und dicker.
Beispiel.
In 1 kg konzentrierte Ameisensäure (ca. 990/0) vermischt mit 1 kg konzentrierte Phosphorsäure, werden 200 g entfettete, schwach gebleichte Baumwolle eingerührt. Nach einigen Stunden hat sich ohne weiteres Rühren die Zellulose in eine bräunliche sirupöse viskoso Flüssigkeit verwandelt.
Ersetzt man im vorliegenden Beispiel die Baumwolle durch Kunstseidenabfälle, so entsteht in der halben Zeit schon ein nur leicht gelb gefärbter Sirup.
Die Lösungen sollen in üblicher Weise zu Fäden usw. verarbeitet werden.
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**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
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Process for the production of long-lasting, viscous cellulose solutions.
It is known that the hydrates of a certain composition which fall off during the manufacture of rayon can be processed in formic acid after some time at normal temperature with esterification to form a technically important solution of cellulose formate in formic acid without the addition of a condensing agent. Ordinary bleached or mercerized cellulose will not dissolve under these conditions.
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wise with the formation of new acidic proteins.
It is also known that acetic acid and phosphoric acid are suitable for making solutions of cellulose.
On the other hand, the mixture of phosphoric acid and formic acid not only has the advantage of greater cheapness, but the solution takes a few hours, as the artificial silk waste that has been brought in melts away, similar to the way the colloid gum arabic swells to slime in water. There is therefore a significant technical advance over the use of acetic acid. The higher fatty acids do not intend to dissolve or prevent decomposition, so that the behavior of formic acid is to be regarded as peculiar.
If a solution is mixed with waste from rayon manufacture, irrespective of the type of manufacture, or with cellulose hydrate in formic acid or a cellulose formate solution with phosphoric acid, the dissolved esterified cellulose substance evidently deformylates, the solution becomes more viscous and thicker.
Example.
In 1 kg of concentrated formic acid (approx. 990/0) mixed with 1 kg of concentrated phosphoric acid, 200 g of defatted, slightly bleached cotton are stirred in. After a few hours the cellulose has turned into a brownish, syrupy, viscous liquid without further stirring.
If, in the present example, the cotton is replaced with artificial silk waste, a syrup that is only slightly yellow in color is produced in half the time.
The solutions should be processed into threads etc. in the usual way.
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** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT54819T | 1911-01-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT54819B true AT54819B (en) | 1912-08-10 |
Family
ID=30119668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT54819D AT54819B (en) | 1911-01-05 | 1911-01-05 | Process for the production of long-lasting, viscous cellulose solutions. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT54819B (en) |
-
1911
- 1911-01-05 AT AT54819D patent/AT54819B/en active
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