CH118714A - Process for the production of highly concentrated and nitrogen oxide-free nitric acid. - Google Patents

Process for the production of highly concentrated and nitrogen oxide-free nitric acid.

Info

Publication number
CH118714A
CH118714A CH118714DA CH118714A CH 118714 A CH118714 A CH 118714A CH 118714D A CH118714D A CH 118714DA CH 118714 A CH118714 A CH 118714A
Authority
CH
Switzerland
Prior art keywords
nitric acid
production
nitrogen oxide
highly concentrated
free nitric
Prior art date
Application number
Other languages
German (de)
Inventor
Basel Elektrizitaetswerk L Und
Luescher Dr Emil
Original Assignee
Lonza Ag
Luescher Dr Emil
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 Lonza Ag, Luescher Dr Emil filed Critical Lonza Ag
Publication of CH118714A publication Critical patent/CH118714A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
    • C01B21/38—Nitric acid
    • C01B21/44—Concentration

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Description

  

  Verfahren     zur    Herstellung     hochkonzentrierter    und     stiekogydfreier    Salpetersäure.    Bei der direkten Kondensation der Am  moniakoxydationsgase erhält man bekannt  lich im günstigsten Falle eine zirka 60 bis       65%ige    Salpetersäure. Durch Behandlung  derselben mit flüssigen Stickoxyden gelangt  man zu noch konzentrierteren Säuren, doch ge  lingt es auch auf diese Weise nicht, restlos  eine praktisch 100%ige Säure zu erhalten,  sofern man nicht unter Druck arbeitet, was  kostspielige Apparaturen bedingt.  



  Es wurde gefunden, dass man unter wirt  schaftlich     günstigen        Bedingungen    glatt 99  bis 100% farblose Salpetersäure erhalten  kann, wenn man starke Salpetersäure, zum  Beispiel 80 und höherprozentige, mit Stick  stofftetroxyd und ozonhaltigem     Sauerstoff     behandelt.  



  An Stelle der bei der Kondensation der       Ammoniakoxydationsgase    direkt anfallenden,  verhältnismässig verdünnten Säure kann man  natürlich auch eine höher konzentrierte,         stickoxydhaltige    Salpetersäure anderer Pro  venienz     verwenden.    Auch in diesem Falle  liegen die     Vorteile    des Verfahrens darin,  dass man     neben    einer     weitergehenderen    Kon  zentration der Salpetersäure leicht ein farb  loses, das heisst     stiekoxydfreies    Produkt er  hält.

   Das bis jetzt übliche, mit Verlusten  verbundene Abblasen oder     Abdestillieren    der       gelösten        Stickoxyde    fällt bei obiger Arbeits  weise weg.



  Process for the production of highly concentrated and stiekogyd-free nitric acid. In the case of direct condensation of the ammonia oxidation gases, as is known, in the most favorable case, about 60 to 65% nitric acid is obtained. By treating them with liquid nitrogen oxides, even more concentrated acids are obtained, but even in this way it is not possible to obtain practically 100% acid completely, unless one works under pressure, which requires expensive equipment.



  It has been found that under economically favorable conditions, 99 to 100% colorless nitric acid can be obtained smoothly if strong nitric acid, for example 80 and higher percentage, is treated with nitrogen oxide and ozone-containing oxygen.



  Instead of the relatively dilute acid which occurs directly during the condensation of the ammonia oxidation gases, a higher concentration, nitrogen oxide-containing nitric acid of a different Provenance can of course also be used. In this case, too, the advantages of the process are that, in addition to a more extensive concentration of nitric acid, a colorless product, that is to say free from carbon dioxide, is easily obtained.

   The usual up to now, associated with losses blowing off or distilling off the dissolved nitrogen oxides falls away with the above work way.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung hochkonzen trierter und- stickoxydfreier Salpetersäure, dadurch gekennzeichnet, dass man wasserhal tige Salpetersäure mit Stickstofftetroxyd und ozonhaltigem Sauerstoff behandelt. PATENT CLAIM: Process for the production of highly concentrated and nitrogen oxide-free nitric acid, characterized in that water-containing nitric acid is treated with nitrogen tetroxide and ozone-containing oxygen.
CH118714D 1925-11-20 1925-11-20 Process for the production of highly concentrated and nitrogen oxide-free nitric acid. CH118714A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH118714T 1925-11-20

Publications (1)

Publication Number Publication Date
CH118714A true CH118714A (en) 1927-01-17

Family

ID=4377681

Family Applications (1)

Application Number Title Priority Date Filing Date
CH118714D CH118714A (en) 1925-11-20 1925-11-20 Process for the production of highly concentrated and nitrogen oxide-free nitric acid.

Country Status (1)

Country Link
CH (1) CH118714A (en)

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