DE1044049B - Process for the production of hydrocyanic acid - Google Patents

Process for the production of hydrocyanic acid

Info

Publication number
DE1044049B
DE1044049B DED23353A DED0023353A DE1044049B DE 1044049 B DE1044049 B DE 1044049B DE D23353 A DED23353 A DE D23353A DE D0023353 A DED0023353 A DE D0023353A DE 1044049 B DE1044049 B DE 1044049B
Authority
DE
Germany
Prior art keywords
nitrogen
hydrocyanic acid
production
pressure
mercury
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.)
Pending
Application number
DED23353A
Other languages
German (de)
Inventor
Dr Hans Kroepelin
Dr Paul Klencz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
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 Degussa GmbH filed Critical Degussa GmbH
Priority to DED23353A priority Critical patent/DE1044049B/en
Publication of DE1044049B publication Critical patent/DE1044049B/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01CAMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C3/00Cyanogen; Compounds thereof
    • C01C3/02Preparation, separation or purification of hydrogen cyanide
    • C01C3/0208Preparation in gaseous phase
    • C01C3/025Preparation in gaseous phase by using a plasma

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Herstellung von Blausäure Im Patent 1028 103 ist ein Verfahren zur Herstellung von Blausäure durch Umsetzung von Kohlenwasserstoffen in Gegenwart von Stickstoff oder stickstoffhaltigen Substanzen im Lichtbogen beschrieben, bei dem in flüssigen, gegebenenfalls stickstoffhaltigen Kohlenwasserstoffverbindungen in Gegenwart von Stickstoff oder Stickstoffverbindungen zwischen festen, stromführenden und beweglichen, nicht mit der Stromquelle verbundenen Hilfselektroden durch periodisches Abheben der Hilfselektroden von den festen Elektroden eine Vielzahl intermittierend brennender Lichtbogen erzeugt wird.A process for preparing hydrocyanic acid in Patent 1,028,103 is a process for preparing hydrogen cyanide by reacting hydrocarbons in the presence of nitrogen or nitrogen-containing substances described in the arc, in which, in liquid, optionally nitrogen-containing hydrocarbon compounds in the presence of nitrogen or nitrogen compounds between fixed current-carrying and movable auxiliary electrodes not connected to the power source, a plurality of intermittently burning arcs is generated by periodically lifting the auxiliary electrodes from the fixed electrodes.

Es wurde gefunden, daß sieh eine wesentliche Verbesserung des Verfahrens gemäß Patent 1028 103 in Gestalt einer Erhöhung der Ausbeute an gebildeter Blausäure dadurch ergibt, daß die Spaltung der Kohlenwasserstoffe in Gegenwart von Stickstoff oder auch von stickstoffhaltigen Kohlenwasserstoffen durch eine Vielzahl kleiner Lichtbogen unter vermindertem Druck vorgenommen wird. Besonders günstige Ergebnisse werden erzielt, wenn der Druck im Spaltraum weniger als 250 mm Quecksilber beträgt.It has been found that see a substantial improvement of the method of Patent 1,028,103, this results in the form of an increase in the yield of formed hydrocyanic acid, that cleavage of the hydrocarbons in the presence of nitrogen or nitrogen-containing hydrocarbons smaller by a plurality of arc under reduced pressure is made. Particularly favorable results are achieved when the pressure in the gap is less than 250 mm of mercury.

Die Verbesserung des Verfahrens gemäß Hauptpatent wird an Hand des nachstehenden Zahlenbeispiels belegt, wobei die Zusammensetzung des Reaktionsgases beim Arbeiten mit Unterdruck verglichen wird mit einer Arbeitsweise, wie sie im Hauptpatent beim Betrieb des Spaltgefäßes unter Normaldruck beschrieben worden ist.The improvement of the process according to the main patent is based on the the following numerical example evidenced, the composition of the reaction gas when working with negative pressure is compared with a working method as it is in Main patent has been described for the operation of the split vessel under normal pressure.

Beispiel In einer Zersetzungsapparatur mit einem quadratischen Gefäß von 16 cm Seitenlänge wurden 1600 cm3 Anilin derart gespalten, daß auf einem Rost aus Kohlestäben sechzehn Koksstücke als Hilfselektroden angeordnet wurden. Zur Strombegrenzung wurde bei Benutzung einer Wechselspannung von 220 V ein Widerstand von 5,2 Ohm vorgeschaltet. In dieser Anordnung wurde der Spaltvorgang einerseits bei Normaldruck von etwa 760 mm Hg, andererseits bei einem Unterdruck von nur 50 mm Hg durchgeführt. Die Zusammensetzung des Spaltgases für beide Versuchsreihen ergibt sich aus nachfolgender Aufstellung: Spaltgas Druck im Spaltgefäß 760 mm Hg I 50 mm Hg Volumprozent C2 H2 ............... 27,5 28,5 C3 Hs . . . . . . . . . . . . 0,27 0,1 C2 H4 ............... 2,14 0,8 H2 ... .. .. ........... 53,5 52,5 CH4+Hom. ........ 2,14 0,64 H C N .............. 14.7 17.4 Der Gehalt der Spaltgase an H C N hat sich demnach durch Anwendung eines Druckes von 50 mm Hg an Stehle von 760 mm Hg um 18,3°/o erhöht.EXAMPLE In a decomposition apparatus with a square vessel 16 cm on a side, 1600 cm3 of aniline were split in such a way that sixteen pieces of coke were placed as auxiliary electrodes on a grate made of carbon rods. When using an alternating voltage of 220 V, a resistor of 5.2 ohms was connected upstream to limit the current. In this arrangement, the splitting process was carried out on the one hand at normal pressure of about 760 mm Hg and on the other hand at a negative pressure of only 50 mm Hg. The composition of the fission gas for both series of tests results from the following list: Cracking gas pressure in the cracking vessel 760 mm Hg I 50 mm Hg Volume percentage C2 H2 ............... 27.5 28.5 C3 Hs. . . . . . . . . . . . 0.27 0.1 C2 H4 ............... 2.14 0.8 H2 ... .. .. ........... 53.5 52.5 CH4 + hom. ........ 2.14 0.64 HCN .............. 14.7 17.4 The HCN content of the fission gases has accordingly increased by 18.3% by applying a pressure of 50 mm Hg to steel of 760 mm Hg.

Claims (2)

PATENTANSPRÜCHE: 1. Verfahren zur Gewinnung von Blausäure durch Umsetzung von Kohlenwasserstoffen in Gegenwart von Stickstoff oder stickstoffhaltigen Verbindungen im Lichtbogen nach Patent 1028 103, dadurch gekennzeichnet, daß die Spaltung unter vermindertem Druck durchgeführt wird. PATENT CLAIMS: 1. Process for obtaining hydrogen cyanide by converting hydrocarbons in the presence of nitrogen or nitrogen-containing compounds in an electric arc according to Patent 1028 103, characterized in that the cleavage is carried out under reduced pressure. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß im Spaltraum Drücke von weniger als 250 mm Quecksilber, vorzugsweise weniger als 100 mm Quecksilber, eingehalten werden.2. The method according to claim 1, characterized in that pressures of less than 250 mm of mercury in the gap, preferably less than 100 mm of mercury.
DED23353A 1954-10-13 1954-10-13 Process for the production of hydrocyanic acid Pending DE1044049B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED23353A DE1044049B (en) 1954-10-13 1954-10-13 Process for the production of hydrocyanic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED23353A DE1044049B (en) 1954-10-13 1954-10-13 Process for the production of hydrocyanic acid

Publications (1)

Publication Number Publication Date
DE1044049B true DE1044049B (en) 1958-11-20

Family

ID=7037787

Family Applications (1)

Application Number Title Priority Date Filing Date
DED23353A Pending DE1044049B (en) 1954-10-13 1954-10-13 Process for the production of hydrocyanic acid

Country Status (1)

Country Link
DE (1) DE1044049B (en)

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