AT68852B - Process for the preparation of organic acid esters of cellulose. - Google Patents
Process for the preparation of organic acid esters of cellulose.Info
- Publication number
- AT68852B AT68852B AT68852DA AT68852B AT 68852 B AT68852 B AT 68852B AT 68852D A AT68852D A AT 68852DA AT 68852 B AT68852 B AT 68852B
- Authority
- AT
- Austria
- Prior art keywords
- parts
- cellulose
- preparation
- organic acid
- acid esters
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 7
- 229920002678 cellulose Polymers 0.000 title description 7
- 239000001913 cellulose Substances 0.000 title description 7
- -1 organic acid esters Chemical class 0.000 title 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical class OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical class O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims 1
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 18
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 229960000583 acetic acid Drugs 0.000 description 6
- 235000010980 cellulose Nutrition 0.000 description 6
- 239000012362 glacial acetic acid Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- QDHHCQZDFGDHMP-UHFFFAOYSA-N Chloramine Chemical compound ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
Landscapes
- Polysaccharides And Polysaccharide Derivatives (AREA)
Description
<Desc/Clms Page number 1>
EMI1.1
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Säureanhydride azidylierbar ist.
Das Verfahren möge durch folgende Beispiele erläutert werden :
A) 1 Teil Zellulose wird nach der deutschen Patentschrift Nr. 203178 mit 4 Teilen Eisessig, 0-02 Teilen sublimiertem Eisenchlorid und 5 Teilen Essigsaureanhydrid auf 70"bis zur Auflösung der Zellulose erhitzt. Alsdann werden 0#8 Teile Wasser hinzugegeben und auf 70 weiter erhitzt, bis eine herausgenommene Probe azetonloslich gewerden ist.
EMI1.3
C) 1 Teil Zellulose wird nach der deutschen Patentschrift Nr. 203178 mit, 4 Teilen Eisessig.
0'1 Teil Chlorammonium und 5 Teilen Essigsaureanhydrid auf 1000 erhitzt, bis Auflösung eingetreten ist. Alsdann werden 0'8 Teile Wasser hinzugefügt und auf 30 bis 60 weiter erhitzt, bis eine herausgenommen Probe in Azeton löslich geworden ist.
D) 1 Teil Zellulose wird nach der deutschen Patentschrift Nr. 203178 mit 4 Teilen Eisessig, 0#05 Teilen Kupferchlorid (Cu Cl2, 2 H2O) und 5 Teilen Essigsäureanhydrid bei 10 gelost.
Darauf werden 0'8 Teile Wasser hinzugefügt und auf 60 bis 70 erbitzt, bis eine herausgenommene Probe azetonlöslich geworden ist.
E) I Teil Zellulose wird nach der deutschen Patentschrift Nr. 203178 mit 4 Teilen Eisessig, 0-1 Teil Ammoniumnitrat und 5 teilen Essigsäureanhydrid bei 100 bis zur Lösung erhitzt. Darauf
EMI1.4
löslich erweist.
F) 1 Teil Zellulose wird nach der deutschen Patentschrift Nr. 203178 mit 4 Teilen Eisessige 0-1 Teil Chlorzink und 5 Teilen Essigsäureanhydrid auf 100 bis zur Lösung erhitzt. Darauf werden 0'8 Teile Wasser hinzugefügt und solange auf 70 erhitzt, bis eine herausgenommene Probe in Azeton löslich geworden ist.
In dem Verfahren können die angewandten Mengen Wasser in weiten Grenzen abgeändert
EMI1.5
z. B. mit Schwefelsäure oder einem Sulfat, hergestellt sein. In dem ! 1 Falle ist vor dem Behandeln mit Wasser nur erforderlich, die Wirkung der Schwefelsäure oder der Sulfate durch geeignete
EMI1.6
an die Stelle zu setzen.
Das Essigsäureanhydrid kann in dem Verfahren durch ein anderes organisches Säureanhydrid und der Eisessig durch ein anderes geeignetes Lösungs- oder Verdünnungsmittel ersetzt werden.
Das vorliegende Verfahren unterscheidet sich vor dem Verfahren der frahzösischen Zusatz- patentschrift 14558 zur Patentschrift Nr. 432046, in welcher die Umwandlung in leichtlösliche (szeton- usw. lösliche) Azetylzellulosen in Gegenwart starker Säuren erfolgt, durch die Verwendung von stöchiometrisch neutralen Chloriden oder Nitraten.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
EMI1.1
EMI1.2
Acid anhydride is acidylatable.
The process should be illustrated by the following examples:
A) 1 part of cellulose is heated according to German patent specification No. 203178 with 4 parts of glacial acetic acid, 0-02 parts of sublimed iron chloride and 5 parts of acetic anhydride to 70 "until the cellulose dissolves. Then 0 # 8 parts of water are added and further to 70 heated until a removed sample has become acetone-soluble.
EMI1.3
C) 1 part of cellulose is mixed with 4 parts of glacial acetic acid according to German Patent No. 203178.
0'1 part of chlorammonium and 5 parts of acetic anhydride heated to 1000 until dissolution has occurred. Then 0'8 parts of water are added and heated to 30 to 60 further until a sample taken has become soluble in acetone.
D) 1 part of cellulose is dissolved at 10 with 4 parts of glacial acetic acid, 0 # 05 parts of copper chloride (Cu Cl2, 2 H2O) and 5 parts of acetic anhydride according to German Patent No. 203178.
Then 0'8 parts of water are added and heated to 60 to 70 until a sample taken out has become soluble in acetone.
E) I part of cellulose is heated according to German Patent No. 203178 with 4 parts of glacial acetic acid, 0-1 part of ammonium nitrate and 5 parts of acetic anhydride at 100 to dissolve. Thereon
EMI1.4
proves soluble.
F) 1 part of cellulose is heated to 100 with 4 parts of glacial acetic acid 0-1 part of zinc chloride and 5 parts of acetic anhydride according to German patent specification No. 203178 until it dissolves. Then 0.8 parts of water are added and the mixture is heated to 70 until a sample taken has become soluble in acetone.
In the process, the amounts of water used can be varied within wide limits
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z. B. with sulfuric acid or a sulfate. By doing ! 1 trap is only required before treating with water, the action of the sulfuric acid or the sulfates by suitable
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to put in place.
The acetic anhydride can be replaced in the process by another organic acid anhydride and the glacial acetic acid by another suitable solvent or diluent.
The present process differs from the process of the French additional patent specification 14558 to patent specification No. 432046, in which the conversion into easily soluble (scetone etc. soluble) acetyl celluloses takes place in the presence of strong acids, through the use of stoichiometrically neutral chlorides or nitrates.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE67814X | 1912-02-01 | ||
| DE68852X | 1912-02-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT68852B true AT68852B (en) | 1915-05-25 |
Family
ID=25749446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT68852D AT68852B (en) | 1912-02-01 | 1913-02-08 | Process for the preparation of organic acid esters of cellulose. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT68852B (en) |
-
1913
- 1913-02-08 AT AT68852D patent/AT68852B/en active
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