DE249329C - - Google Patents

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Publication number
DE249329C
DE249329C DE1911249329D DE249329DA DE249329C DE 249329 C DE249329 C DE 249329C DE 1911249329 D DE1911249329 D DE 1911249329D DE 249329D A DE249329D A DE 249329DA DE 249329 C DE249329 C DE 249329C
Authority
DE
Germany
Prior art keywords
oxygen
nitric acid
absorption
gases
absorption system
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
Application number
DE1911249329D
Other languages
German (de)
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Application granted granted Critical
Publication of DE249329C publication Critical patent/DE249329C/de
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00Nitrogen; Compounds thereof
    • C01B21/20Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
    • C01B21/24Nitric oxide (NO)
    • C01B21/26Preparation by catalytic or non-catalytic oxidation of ammonia

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

- JV! 249329 -KLASSE 12 f. GRUPPE 26. - JV! 249329 - CLASS 12 for GROUP 26.

Patentiert im Deutschen Reiche vom 7. April 1911 ab. Patented in the German Empire on April 7, 1911 .

Seitdem konzentrierte Stickoxydgase auf einfache und billige Weise gewonnen werden können (vgl. z. B. die Patentschriften 220539 und 244362), bedient man sich zur Überführung dieser Gase in Salpetersäure bei Gegenwart von Wasser oder wäßriger Lösungen vorteilhaft des reinen Sauerstoffs anstatt der Luft, weil man dadurch eine höhere Konzentration der Salpetersäure erzielt und die erforderlichen Absorptionsräume geringer werden. Zum Befördern der Flüssigkeit in die Absorptionsgefäße verwendet man dabei in den meisten Fällen Apparate, welche mit Druckluft betrieben werden, beispielsweise Druckfässer, automatische Druckbirnen, Emulseure usw. Die sogenannte Abluft läßt man entweder ins Freie treten, wobei aber ganz erhebliche Verluste an Stickoxydgasen bzw. Salpetersäure auftreten, oder man führt die Abluft in das Absorptionssystem ein. Man vermeidet im letzten Falle zwar direkte Verluste an Salpetersäure, hat aber den Nachteil, daß Stickstoff in die Absorptionsanlage gelangt und die Gase verdünnt. Ist man, wie es in der Praxis vielfach der Fall ist, gezwungen, die Flüssigkeit mehrmals durch das Absorptionssystem zu führen, so kann dabei die Verdünnung der Gase durch den eingeführten Stickstoff so groß werden, daß ein Vorteil in der Verwendung von reinem Sauerstoff nicht mehr besteht.Since then, concentrated nitrogen oxide gases have been obtained in a simple and cheap way can (see, for example, patents 220539 and 244362), one uses for the transfer these gases in nitric acid in the presence of water or aqueous solutions are advantageous of pure oxygen instead of air, because it gives you a higher concentration of nitric acid and the required absorption spaces are reduced. To convey the liquid into the absorption vessels, one uses the In most cases, devices that are operated with compressed air, e.g. pressure barrels, automatic pressure pears, emulsifiers, etc. The so-called exhaust air is left either step into the open, but with very considerable losses of nitrogen oxide gases or nitric acid occur, or the exhaust air is introduced into the absorption system. One avoids in the latter case, although direct losses of nitric acid, it has the disadvantage that Nitrogen enters the absorption system and dilutes the gases. Is one like it in in practice it is often the case that the liquid is forced several times through the absorption system to lead, the dilution of the gases by the nitrogen introduced can be so great that an advantage in the use of pure oxygen no longer exists.

Diese Übelstände lassen sich nun, wie gefunden wurde, vermeiden, wenn man zum Befördern der Absorptionsflüssigkeit nicht Druckluft, sondern komprimierten Sauerstoff verwendet und den aus den Druckgefäßen austretenden Sauerstoff zugleich mit den etwa mitgerissenen Stickoxydgasen bzw. Salpetersäuredämpfen wieder in das Absorptionssystem einführt. Durch diese Maßnahme werden sowohl Stickstoffverluste wie eine Verdünnung der Stickoxydgase in den Absorptionssystemen vermieden. Da der aus den Druckapparaten austretende Sauerstoff wieder in das Absorptionssystem eintritt, so wird an Sauerstoff nicht mehr als sonst verbraucht, sondern es muß lediglich die Kompressionsarbeit geleistet werden, den Sauerstoff auf die notwendige Spannung zu bringen.As has been found, these evils can now be avoided if one is promoted the absorption liquid does not use compressed air but compressed oxygen and the oxygen emerging from the pressure vessels at the same time as any nitrogen oxide gases or nitric acid vapors that may be entrained reintroduces it into the absorption system. This measure prevents both nitrogen loss and dilution the nitrogen oxide gases avoided in the absorption systems. Since the one from the printing apparatus escaping oxygen re-enters the absorption system, it becomes oxygen not consumed more than usual, only the compression work has to be done to bring the oxygen up to the necessary tension.

Claims (1)

Patent-Anspruch :Patent claim: Verfahren zur Darstellung von Salpetersäure aus Stickoxyden und Sauerstoff in Gegenwart von Wasser oder wäßrigen Lösungen, dadurch gekennzeichnet, daß die zum Transport der Flüssigkeit in den Absorptionssystemen dienenden Apparate mit Sauerstoff betrieben werden und der aus diesen Apparaten austretende Sauerstoff zugleich mit den mitgerissenen salpetersäurehaltigen Dämpfen in das Absorptionssystem zurückgeführt wird. Process for the preparation of nitric acid from nitrogen oxides and oxygen in Presence of water or aqueous solutions, characterized in that the transport of the liquid in the absorption systems serving apparatus are operated with oxygen and the oxygen emerging from these apparatuses is returned to the absorption system at the same time as the entrained nitric acid-containing vapors. BERLIN. GEDRÜCKT IN DER REICHSDRUCKEREI,BERLIN. PRINTED IN THE REICHSDRUCKEREI,
DE1911249329D 1911-04-06 1911-04-06 Expired DE249329C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE249329T 1911-04-06

Publications (1)

Publication Number Publication Date
DE249329C true DE249329C (en) 1912-07-15

Family

ID=43502087

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1911249329D Expired DE249329C (en) 1911-04-06 1911-04-06

Country Status (3)

Country Link
DE (1) DE249329C (en)
FR (1) FR433502A (en)
GB (1) GB191119032A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5499737A (en) * 1993-06-03 1996-03-19 Trw United Carr Gmbh & Co. Kg Retainer plug

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5499737A (en) * 1993-06-03 1996-03-19 Trw United Carr Gmbh & Co. Kg Retainer plug

Also Published As

Publication number Publication date
FR433502A (en) 1912-01-09
GB191119032A (en) 1911-11-02

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