DE876994C - Process for the preparation of acrolein-containing carbonyl compounds - Google Patents
Process for the preparation of acrolein-containing carbonyl compoundsInfo
- Publication number
- DE876994C DE876994C DEB6243D DEB0006243D DE876994C DE 876994 C DE876994 C DE 876994C DE B6243 D DEB6243 D DE B6243D DE B0006243 D DEB0006243 D DE B0006243D DE 876994 C DE876994 C DE 876994C
- Authority
- DE
- Germany
- Prior art keywords
- acrolein
- carbonyl compounds
- containing carbonyl
- preparation
- hydrogenation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/002—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by dehydrogenation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung von Aerolein enthaltenden Carb onylverbindungen Gegenstand des Patents 363 494 ist ein Verfahren zur Herstellung von Aerolein enthaltenden Carbonylverbindungen, bei welchem man Propargylalkohol bei höheren Temperaturen über Hydrierungs- oder Dehydrierungskatalysatoren leitet.Process for the preparation of aerolein-containing carbonyl compounds The subject of the patent 363 494 is a process for the production of aerolein containing Carbonyl compounds, in which propargyl alcohol is used at higher temperatures passes over hydrogenation or dehydrogenation catalysts.
Es wurde nun gefunden, daß es zu dieser Umsetzung nicht der Anwesenheit von ausgesprochenen Hydrierungs- und Dehydrierungskatalysatoren bedarf, sondern daB man auch andere Iiatal`satoren verwenden kann, die keine ausgeprägte Dehydrierungs-Wirkung haben.It has now been found that there is no presence for this implementation of pronounced hydrogenation and dehydrogenation catalysts, but that one can also use other Iatalizers that do not have a pronounced dehydration effect to have.
Im übrigen verfährt man wie beim Hauptpatent. Beispiel Man verdampft stündlich 5o Gewichtsteile einer 3o°;'oigen wäßrigen Lösung von Propargylalkohol und leitet die Dämpfe im Gemisch mit Stickstoff bei 275° über 400 Gewichtsteile eines Glanzkohlekatalysators, der "durch thermische Zersetzung von Äthylen auf Trägern in bekannter Weise erhalten wurde. Die den Reaktionsraum verlassenden Gase werden in einem Warmabscheider teilweise, in einem anschließenden Kaltabscheider nahezu vollständig von Wasser, unverändertem Alkohol und höhersiedenden Anteilen befreit, so daß in der mit Kohlensäure gekühlten letzten Vorlage hauptsächlich Acrolein neben Kohlenwasserstoffen und Spuren Propionaldehyd kondensiert wird. Das Acrolein kann durch Destillation in reiner Form erhalten werden. Die Ausbeute beträgt 2o °/o der Theorie. An Stelle des Glanzkohlekatalysators kann man auch aktives Aluminiumoxyd verwenden, wobei man Acrolein in einer Ausbeute von 25 °/o der Theorie erhält.The rest of the procedure is the same as for the main patent. Example One vaporizes every hour 50 parts by weight of a 30% aqueous solution of propargyl alcohol and passes the vapors mixed with nitrogen at 275 ° over 400 parts by weight a charcoal catalyst, der "by thermal decomposition of Ethylene was obtained on supports in a known manner. Those leaving the reaction space Gases are partially separated in a hot separator and in a subsequent cold separator almost completely of water, unchanged alcohol and higher boiling parts freed, so that in the last template cooled with carbon dioxide mainly acrolein in addition to hydrocarbons and traces of propionaldehyde is condensed. The acrolein can be obtained in pure form by distillation. The yield is 2o ° / o of theory. Active aluminum oxide can also be used instead of the lustrous carbon catalyst use, acrolein being obtained in a yield of 25% of theory.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB6243D DE876994C (en) | 1943-01-13 | 1943-08-15 | Process for the preparation of acrolein-containing carbonyl compounds |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB6450D DE863494C (en) | 1943-01-13 | 1943-01-13 | Process for the preparation of acrolein-containing carbonyl compounds |
| DEB6243D DE876994C (en) | 1943-01-13 | 1943-08-15 | Process for the preparation of acrolein-containing carbonyl compounds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE876994C true DE876994C (en) | 1953-05-18 |
Family
ID=25964844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEB6243D Expired DE876994C (en) | 1943-01-13 | 1943-08-15 | Process for the preparation of acrolein-containing carbonyl compounds |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE876994C (en) |
-
1943
- 1943-08-15 DE DEB6243D patent/DE876994C/en not_active Expired
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