CH153190A - Process for the preparation of ethyl acrylate. - Google Patents
Process for the preparation of ethyl acrylate.Info
- Publication number
- CH153190A CH153190A CH153190DA CH153190A CH 153190 A CH153190 A CH 153190A CH 153190D A CH153190D A CH 153190DA CH 153190 A CH153190 A CH 153190A
- Authority
- CH
- Switzerland
- Prior art keywords
- ethyl acrylate
- preparation
- atmosphere
- acrylic acid
- ethanol
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung von Aerylsäureäthylester. Es ist bekannt, Acrylsäuremethylester cis #I_#ch Einwirken von Methanol und einem wasserabspaltenden Mittel auf Äthylencyan- hydrin in saurem Medium bei erhöhter Tem peratur herzustellen.
Es hat sich gezeigt, dass als Ausgangs material zur Herstellung von Acrylsäureestern auch Hydracrylsäure verwendet werden kann. Vorliegendes Patent bezieht sich auf ein Ver fahren zur Herstellung von Acrylsäureäthyl- ester durch Aufeinandereinivirkenlassen von Hydracrylsäure, Äthanol und eines wasser abspaltenden Mittels in saurem Medium bei erhöhter Temperatur, z. B. bei 120 bis 180 0.
Bei der nach den üblichen Methoden durch geführten Veresterung der Acrylsäure ent stehen Verluste durch Polymerisation und Zersetzung, so dass es vorteilhaft ist, Acryl säureester über die Hydracrylsäureester her zustellen. Es gelingt, die Nebenreaktionen auf ein Minimum zu beschränken.
Es kann bei Atmosphärendruck oder da von verschiedenem Druck gearbeitet werden. <I>Beispiel:</I> 45 kg Hydracrylsäure werden mit 50 kg Äthanol und 40 kg Schwefelsäure vom spe zifischen Gewicht 1,84 vermischt und langsam unter Rühren auf 175 0 erhitzt. Es ergibt sich eine Ausbeute von 80 bis 90'/o Acry1säure- äthylester.
Process for the preparation of ethyl acetate. It is known to produce methyl acrylate cis # I_ # ch action of methanol and a dehydrating agent on ethylene cyanohydrin in an acid medium at elevated temperature.
It has been shown that hydracrylic acid can also be used as a starting material for producing acrylic acid esters. The present patent relates to a process for the production of ethyl acrylate by letting hydracrylic acid, ethanol and a dehydrating agent in an acidic medium at elevated temperature, eg. B. at 120 to 180 0.
In the esterification of acrylic acid carried out by the customary methods, losses arise through polymerization and decomposition, so that it is advantageous to prepare acrylic acid esters via the hydracrylic acid esters. It is possible to keep the side reactions to a minimum.
It can be carried out at atmospheric pressure or there from different pressure. <I> Example: </I> 45 kg of hydracrylic acid are mixed with 50 kg of ethanol and 40 kg of sulfuric acid with a specific weight of 1.84 and slowly heated to 175 ° C. while stirring. A yield of 80 to 90% of ethyl acrylate results.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE153190X | 1928-06-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH153190A true CH153190A (en) | 1932-03-15 |
Family
ID=5675560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH153190D CH153190A (en) | 1928-06-18 | 1929-04-15 | Process for the preparation of ethyl acrylate. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH153190A (en) |
-
1929
- 1929-04-15 CH CH153190D patent/CH153190A/en unknown
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