AT106590B - Process for the synthetic production of ammonia from the elements. - Google Patents

Process for the synthetic production of ammonia from the elements.

Info

Publication number
AT106590B
AT106590B AT106590DA AT106590B AT 106590 B AT106590 B AT 106590B AT 106590D A AT106590D A AT 106590DA AT 106590 B AT106590 B AT 106590B
Authority
AT
Austria
Prior art keywords
ammonia
elements
synthetic production
sodium
alkali
Prior art date
Application number
Other languages
German (de)
Inventor
Friedrich Uhde
Original Assignee
Uhde Gmbh Friedrich
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Uhde Gmbh Friedrich filed Critical Uhde Gmbh Friedrich
Application granted granted Critical
Publication of AT106590B publication Critical patent/AT106590B/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen
    • C01B3/02Production of hydrogen; Production of gaseous mixtures containing hydrogen
    • C01B3/025Preparation or purification of gas mixtures for ammonia synthesis
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01CAMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00Ammonia; Compounds thereof
    • C01C1/02Preparation, purification or separation of ammonia
    • C01C1/04Preparation of ammonia by synthesis
    • C01C1/0405Preparation of ammonia by synthesis from N2 and H2 in presence of a catalyst
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/52Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)
  • Detergent Compositions (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur synthetischen Herstellung von   Ammoniak   aus den Elementen. 
 EMI1.1 
 z. B. Sauerstoff, Wasserdampf und Kohlenoxyd, in dem zur Synthese benutzten Gasgemische sind und daher nur eine sehr kurze Lebensdauer aufweisen. Man hat daher verschiedentlich versucht, das Gasgemisch vor der Katalyse mittels besonders wirksamer Reinigungsmittel von solchen Verunreinigungen zu befreien, jedoch sind die bisher in Vorschlag gebrachten Mittel nicht hinreichend wirksam, um die Verwendung eines hochaktiven Katalysators im Dauerbetrieb zu gewährleisten. 



   Es ist z. B. vorgeschlagen worden, das Gasgemisch unmittelbar vor der Katalyse mittels Natrium oder Natriumamid zu reinigen. Beide Substanzen in fester oder flüssiger Form lassen jedoch geringe Mengen von Sauerstoff hindurch, die in verhältnismässig sehr kurzer Zeit die Wirksamkeit des Katalysators beträchtlich herabsetzen. Es ist fernerhin vorgeschlagen worden, das Natriummetall in flüssigem Ammoniak aufzulösen, um durch die feine Verteilung des kolloidal gelösten Natriums eine bessere Wirkung zu erzielen. Auch dieses Mittel genügt jedoch nicht, da infolge des notwendigen Arbeitens bei Zimmertemperatur oder darunter die Reaktionsgeschwindigkeit nicht gross genug ist, um auch Spuren von Sauerstoff von der Grössenanordnung 0.0001 Volumprozent zurückzuhalten. 



   Es wurde nun gefunden, dass man durch Auflösen eines Alkali-oder Erdalkalimetalles, z. B. Natrium in geschmolzenen Alkaliamiden, z. B. Natriumamid, ein Reinigungsmittel erhält, das allen Anforderungen genügt. In diesem Falle wirkt nämlich nicht nur das kolloidal gelöste Metall, sondern auch das Dispersionsmittel selbst als Reinigungsmittel, und fernerhin hat man die   Moghchkeit,   das Gasgemisch bei Temperaturen von   200-3000 C durchzuleiten   und infolgedessen die   Reaktionsfähigkeit   sehr beträchtlich zu steigern.

   Hiedurch ist es möglich geworden, dieses Gasgemisch so weitgehend zu reinigen, dass die Lebensdauer eines hochaktiven Katalysators fast unbeschränkt wird. 
 EMI1.2 
 die beiden Gase Wasserstoff und Stickstoff einzeln für sich vor der Mischung durch das Reinigungsmittel geleitet werden. 

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



   <Desc / Clms Page number 1>
 



  Process for the synthetic production of ammonia from the elements.
 EMI1.1
 z. B. oxygen, water vapor and carbon oxide, in the gas mixtures used for the synthesis are and therefore only have a very short life. Various attempts have therefore been made to remove such impurities from the gas mixture prior to catalysis by means of particularly effective cleaning agents, but the agents proposed so far are not sufficiently effective to ensure the use of a highly active catalyst in continuous operation.



   It is Z. B. has been proposed to purify the gas mixture immediately before catalysis using sodium or sodium amide. However, both substances in solid or liquid form allow small amounts of oxygen to pass through, which in a relatively very short time considerably reduce the effectiveness of the catalyst. It has also been proposed to dissolve the sodium metal in liquid ammonia in order to achieve a better effect through the fine distribution of the colloidally dissolved sodium. However, this means is not sufficient either, since, as a result of the necessary work at room temperature or below, the reaction rate is not great enough to also retain traces of oxygen of the order of magnitude of 0.0001 percent by volume.



   It has now been found that by dissolving an alkali or alkaline earth metal, e.g. B. sodium in molten alkali amides, e.g. B. Sodium amide, a cleaning agent that meets all requirements. In this case, not only the colloidally dissolved metal but also the dispersant itself acts as a cleaning agent, and furthermore one has the possibility of passing the gas mixture through at temperatures of 200-3000 C and consequently increasing the reactivity very considerably.

   This makes it possible to purify this gas mixture to such an extent that the service life of a highly active catalyst is almost unlimited.
 EMI1.2
 the two gases hydrogen and nitrogen are passed individually through the cleaning agent before being mixed.

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

 

Claims (1)

PATENT-ANSPRUCH : Verfahren zur synthetischen Herstellung von Ammoniak aus den Elementen, dadurch gekennzeichnet, dass die zur Synthese benutzten Gase einzeln für sich oder im Gemisch vor der Katalyse durch eine Lösung eines Alkali-oder Erdalkalimetalles in geschmolzenen Alkaliamiden, zweckmässig unter Druck, hindurch geleitet werden. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the synthetic production of ammonia from the elements, characterized in that the gases used for the synthesis are passed individually or in a mixture through a solution of an alkali or alkaline earth metal in molten alkali amides, suitably under pressure, before catalysis. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT106590D 1925-02-09 1926-02-06 Process for the synthetic production of ammonia from the elements. AT106590B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE247226X 1925-02-09

Publications (1)

Publication Number Publication Date
AT106590B true AT106590B (en) 1927-06-10

Family

ID=5935314

Family Applications (1)

Application Number Title Priority Date Filing Date
AT106590D AT106590B (en) 1925-02-09 1926-02-06 Process for the synthetic production of ammonia from the elements.

Country Status (5)

Country Link
AT (1) AT106590B (en)
CH (1) CH120795A (en)
FR (1) FR610746A (en)
GB (1) GB247226A (en)
NL (1) NL19121C (en)

Also Published As

Publication number Publication date
NL19121C (en) 1928-12-15
FR610746A (en) 1926-09-11
CH120795A (en) 1927-06-16
GB247226A (en) 1926-10-14

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