AT73410B - Process for catalytic hydrogenation. - Google Patents

Process for catalytic hydrogenation.

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Publication number
AT73410B
AT73410B AT73410DA AT73410B AT 73410 B AT73410 B AT 73410B AT 73410D A AT73410D A AT 73410DA AT 73410 B AT73410 B AT 73410B
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AT
Austria
Prior art keywords
catalytic hydrogenation
carbon oxide
hydrogen
water vapor
parts
Prior art date
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German (de)
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Basf Ag
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Publication of AT73410B publication Critical patent/AT73410B/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur katalytischen   Hydrogenisation.   



   Die katalytische Hydrogenisation wurde bisher ausschliesslich mit Wasserstoff oder Wasserstoff enthaltenden Gasen   ausgeführte  
Es wurde nun die technisch wichtige Beobachtung gemacht, dass diese Hydrogenisation auch bei Abwesenheit von Wasserstoff mit Kohlenoxyd bzw. kohlenoxydhaltigen Gasen gelingt, wenn man in das Gasgemisch Wasserdampf einführt Auch bei wasserstoffbaltigen Kohlenoxydgemischen kann man durch   Zufügung   von Wasserdampf eine Erhöhung der Reduktionswirkung erzielen. Auffallenderweise lässt sich diese Hydrogenisation oft schon bei relativ niedriger Temperatur ausführen. 



   Das Verfahren, durch welches es ermöglicht wird, den Wasserstoff durch das namentlich in Mischung erheblich billigere Kohlenoxyd zu ersetzen, kann für die verschiedenartigsten, katalytischen Hydrogenisationen Anwendung finden. Zwecks Reduktion von Nitroverbindungen, z. B. zur Überführung von Nitrobenzol in Anilin, leitet man zweckmässig mindesten so viel Wasserdampf zu, dass auf 3 Moleküle Kohlenoxyd 1 Molekül Wasserdampf vorhanden ist. Unter geeigneten Bedingungen lässt sich diese Reduktion schon bei 200 bis   2200 ausführen.   



     Beispiel : Eine Kupferkontaktmasse,   wie sie z. B. durch Überziehen von 130 Teilen Bimsstein mit einem Gemisch von 24-3 Teilen   Kupferharbonat,   2-7 Teilen Zinkkarbonat und 20 Teilen etwa   40% iger Wasserglas ! ösung und Reduktion   bei 180 bis   2200   erhältlich ist, wird in einen vertikalen Zylinder   gefüllt.   Man leitet in den Zylinder ein Gemisch von Nitrobenzoldämpfen und überschüssigem Kohlenoxyd und Wasserdampf. Bei einer Temperatur von 200 bis   2200 erfolgt   glatte Reduktion zu Anilin. 



   Analog verfährt man bei Verwendung anderer Katalysatoren und anderer zu hydro-   genisierender   Verbindungen. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



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  Process for catalytic hydrogenation.



   The catalytic hydrogenation has hitherto been carried out exclusively with hydrogen or hydrogen-containing gases
The technically important observation has now been made that this hydrogenation also succeeds in the absence of hydrogen with carbon oxide or gases containing carbon oxide, if water vapor is introduced into the gas mixture. Even with hydrogen-containing carbon oxide mixtures, an increase in the reducing effect can be achieved by adding water vapor. It is striking that this hydrogenation can often be carried out at a relatively low temperature.



   The process by which it is made possible to replace the hydrogen with the carbon dioxide, which is considerably cheaper in particular when mixed, can be used for the most varied of catalytic hydrogenations. For the purpose of reducing nitro compounds, e.g. B. to convert nitrobenzene into aniline, it is advisable to add at least enough water vapor that there is 1 molecule of water vapor for every 3 molecules of carbon oxide. Under suitable conditions, this reduction can be carried out as early as 200 to 2200.



     Example: A copper contact mass, as it is e.g. B. by coating 130 parts of pumice stone with a mixture of 24-3 parts of copper carbonate, 2-7 parts of zinc carbonate and 20 parts of about 40% water glass! Solution and reduction available at 180 to 2200 is filled into a vertical cylinder. A mixture of nitrobenzene vapors and excess carbon dioxide and water vapor is passed into the cylinder. Smooth reduction to aniline occurs at a temperature of 200 to 2200.



   The procedure is analogous when using other catalysts and other compounds to be hydrogenated.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH : Verfahren zur katalytischen Hydrogenisation, dadurch gekennzeichnet, dass man Kohlenoxyd oder kohlenoxydhaltige Gasgemische unter Zuführung von Wasserdampf verwendet. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for catalytic hydrogenization, characterized in that carbon oxide or carbon oxide-containing gas mixtures are used with the addition of steam. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT73410D 1914-06-20 1915-04-26 Process for catalytic hydrogenation. AT73410B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE73410X 1914-06-20

Publications (1)

Publication Number Publication Date
AT73410B true AT73410B (en) 1917-05-25

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ID=5636455

Family Applications (1)

Application Number Title Priority Date Filing Date
AT73410D AT73410B (en) 1914-06-20 1915-04-26 Process for catalytic hydrogenation.

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AT (1) AT73410B (en)

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