AT35272B - Process for the production of cellulose products from copper oxide ammonia cellulose solutions. - Google Patents
Process for the production of cellulose products from copper oxide ammonia cellulose solutions.Info
- Publication number
- AT35272B AT35272B AT35272DA AT35272B AT 35272 B AT35272 B AT 35272B AT 35272D A AT35272D A AT 35272DA AT 35272 B AT35272 B AT 35272B
- Authority
- AT
- Austria
- Prior art keywords
- cellulose
- copper oxide
- production
- solutions
- oxide ammonia
- Prior art date
Links
- 229920002678 cellulose Polymers 0.000 title description 6
- 239000001913 cellulose Substances 0.000 title description 6
- DBNPDRYVYQWGFW-UHFFFAOYSA-N N.[Cu]=O Chemical compound N.[Cu]=O DBNPDRYVYQWGFW-UHFFFAOYSA-N 0.000 title description 4
- 238000004519 manufacturing process Methods 0.000 title description 2
- 238000000034 method Methods 0.000 title description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 208000002197 Ehlers-Danlos syndrome Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Landscapes
- Polysaccharides And Polysaccharide Derivatives (AREA)
Description
<Desc/Clms Page number 1>
@erfahrenzur Herstellung von Zelluloseprodukten aus Kupferoxydammoniak zelluloselösungen.
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kupfern der Gebilde mit Säure herzustellen. Bekannt ist auch der günstige Einfluss einer Nachbehandlung der gefällten kupferhaltigen Gebilde mit Natronlauge in Bezug auf Glanz und Festigkeit.
Schliesslich ist auch ein Verfahren bekannt, demzufolge etwa auf 40 C erwärmte Lauge zur
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zellulose von ihrem ösungsmittel bewirkt, sondern lediglich eine dünne, elastische Haut gebildet werden, die den flüssig bleibenden Inhalt umschliesst. Die vollständige Koagulation geht erst langsam an der Luft vor sich, wobei die Gegenwart des Kupferoxydammoniaks das natürlich'' Koagulationsbestreben der Gebilde unterstützt. Die glanzlos gewordenen Gebilde müssen dann behufs Wiederherstellung des Glanzes nochmals mit Natronlauge behandelt und endlich mit Säure entkupfert werden.
Es hat sich nun ergeben, dass es vorteilhaft ist, die Teperatur der Fällauge noch weiter zu steigern. und zwar auf 45 bis 65" ('und die Koagulation der entstandenen Gcbiide sofort in der Fällflüssigkeit selbst zu vollenden. Es können dabei Laugen von 10-40 Prozent und mehr Verwendung finden. Der Zerfall der kupferoxydammoniakzelluloselösung ist dabei ein fast augenblicklicher, Der erzielte technische Fortschritt besteht dabei darin, dass ohne Fadenbruch eine mit der Temperatur in den angegebenen Grenzen stetig steigende Abzugsgeschwindigkeit erzielt
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**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
@Experience for the production of cellulose products from copper oxide ammonia cellulose solutions.
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to copper the structure with acid. It is also known that post-treatment of the precipitated copper-containing structures with caustic soda has a beneficial effect on gloss and strength.
Finally, a method is also known, according to which caustic solution heated to about 40 C is used
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cellulose caused by its solvent, but only a thin, elastic skin is formed that encloses the liquid content. Complete coagulation only takes place slowly in air, whereby the presence of the copper oxide ammonia supports the natural tendency of the structures to coagulate. The structures that have become dull must then be treated again with caustic soda to restore the gloss and finally be decoppered with acid.
It has now been found that it is advantageous to increase the temperature of the precipitation solution even further. namely to 45 to 65 "('and to complete the coagulation of the resulting particles immediately in the precipitating liquid itself. Caustic solutions of 10-40 percent and more can be used. The disintegration of the copper oxide ammonia cellulose solution is almost instantaneous, the technical achieved Progress consists in the fact that, without thread breakage, a take-off speed which increases continuously with the temperature within the specified limits is achieved
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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 |
|---|---|---|---|
| AT35272T | 1907-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT35272B true AT35272B (en) | 1908-11-25 |
Family
ID=3551736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT35272D AT35272B (en) | 1907-10-07 | 1907-10-07 | Process for the production of cellulose products from copper oxide ammonia cellulose solutions. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT35272B (en) |
-
1907
- 1907-10-07 AT AT35272D patent/AT35272B/en active
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