AT67942B - Process for the preparation of cellulose esters. - Google Patents
Process for the preparation of cellulose esters.Info
- Publication number
- AT67942B AT67942B AT67942DA AT67942B AT 67942 B AT67942 B AT 67942B AT 67942D A AT67942D A AT 67942DA AT 67942 B AT67942 B AT 67942B
- Authority
- AT
- Austria
- Prior art keywords
- cellulose esters
- preparation
- chlorine
- cellulose
- desc
- Prior art date
Links
- 229920002678 cellulose Polymers 0.000 title claims description 5
- 238000000034 method Methods 0.000 title claims description 4
- 239000001913 cellulose Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000020 Nitrocellulose Substances 0.000 claims 1
- 230000032050 esterification Effects 0.000 claims 1
- 238000005886 esterification reaction Methods 0.000 claims 1
- ZODDGFAZWTZOSI-UHFFFAOYSA-N nitric acid;sulfuric acid Chemical compound O[N+]([O-])=O.OS(O)(=O)=O ZODDGFAZWTZOSI-UHFFFAOYSA-N 0.000 claims 1
- 229920001220 nitrocellulos Polymers 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 239000003054 catalyst Substances 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- BMYNFMYTOJXKLE-UHFFFAOYSA-N 3-azaniumyl-2-hydroxypropanoate Chemical compound NCC(O)C(O)=O BMYNFMYTOJXKLE-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- SYKNUAWMBRIEKB-UHFFFAOYSA-N [Cl].[Br] Chemical compound [Cl].[Br] SYKNUAWMBRIEKB-UHFFFAOYSA-N 0.000 description 1
- OAAKZKGKPMPJIF-UHFFFAOYSA-N [Cl].[I] Chemical compound [Cl].[I] OAAKZKGKPMPJIF-UHFFFAOYSA-N 0.000 description 1
- 230000021736 acetylation Effects 0.000 description 1
- 238000006640 acetylation reaction Methods 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B7/00—Preparation of cellulose esters of both organic and inorganic acids
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Description
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3 bis 8 Stunden vor sich geht. Die Aufarbeitung der Reaktionsmasse erfolgt in der üblichen Weise.
Beispiel 7 : Trägt man 100 Teile einer vorbehandelten Baumwolle, welche 2 bis 3%
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14 Teilen BromwasserstoNsäure ein und lässt diese Mischung bei gewöhnlicher Temperatur stehen, so erhält man nach drei Tagen eine dicke, vollständig blanke Lösung. Führt man die Reaktion unter Erwärmen, z. B. auf 40 bis zu drrch, so tritt die Azetylierung in sehr viel kürzerer Zeit ein. Die Gewinnung des Reaktionsproduktes erfolgt in der üblichen Weise. Das erhaltene Produkt kann, wenn erforderlich, der Hydrolyse unterworfen werden.
An Stelle der in den vorstehenden Beispielen verwendeten Katalysatoren können auch andere starke oder schwache Katalysatoren, wie beispielsweise Chlor, Chlorbrom bzw. Chlor + Brom, Chlorjod, Chlorzink usw. Verwendung finden.
Die zur Durchführung des Verfahrens in Anwendung zu bringende Temperatur richtet sich ganz nach der Art des Ausgangsmaterials oder der zu verwendenden Katalysatoren und kann innerhalb weiter Grenzen variiert werden, ebenso kann man die Reaktionsdauer je nachdem abkürzen oder verlängern. Schliesslich sei noch bemerkt, dass die vorbehandelte Zellulose mi übrigen trocken oder feucht verwendet werden kann.
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3 to 8 hours going on. The reaction mass is worked up in the customary manner.
Example 7: If 100 parts of a pretreated cotton, which 2 to 3%
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14 parts of hydrobromic acid and this mixture is allowed to stand at ordinary temperature, so after three days a thick, completely shiny solution is obtained. If the reaction is carried out with heating, e.g. B. to 40 or less, the acetylation occurs in a much shorter time. The reaction product is obtained in the usual way. The product obtained can, if necessary, be subjected to hydrolysis.
Instead of the catalysts used in the above examples, other strong or weak catalysts, such as, for example, chlorine, chlorine bromine or chlorine + bromine, chlorine iodine, zinc chloride, etc., can also be used.
The temperature to be used to carry out the process depends entirely on the nature of the starting material or the catalysts to be used and can be varied within wide limits, and the reaction time can also be shortened or lengthened as required. Finally, it should be noted that the pretreated cellulose can be used dry or wet with the rest.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1476X | 1911-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT67942B true AT67942B (en) | 1915-02-10 |
Family
ID=89537702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT67942D AT67942B (en) | 1911-09-04 | 1912-08-21 | Process for the preparation of cellulose esters. |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT67942B (en) |
| FR (1) | FR449253A (en) |
| NL (1) | NL1476C (en) |
-
1912
- 1912-08-21 AT AT67942D patent/AT67942B/en active
- 1912-08-28 FR FR449253A patent/FR449253A/en not_active Expired
- 1912-09-03 NL NL1117A patent/NL1476C/en active
Also Published As
| Publication number | Publication date |
|---|---|
| FR449253A (en) | 1913-02-22 |
| NL1476C (en) | 1916-08-01 |
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