DE366366C - Process for the preparation of nitrogen oxides by catalytic oxidation of ammonia by air or oxygen - Google Patents
Process for the preparation of nitrogen oxides by catalytic oxidation of ammonia by air or oxygenInfo
- Publication number
- DE366366C DE366366C DEB78808D DEB0078808D DE366366C DE 366366 C DE366366 C DE 366366C DE B78808 D DEB78808 D DE B78808D DE B0078808 D DEB0078808 D DE B0078808D DE 366366 C DE366366 C DE 366366C
- Authority
- DE
- Germany
- Prior art keywords
- ammonia
- oxygen
- catalytic oxidation
- preparation
- nitrogen oxides
- 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
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims description 10
- 229910021529 ammonia Inorganic materials 0.000 title claims description 5
- 230000003197 catalytic effect Effects 0.000 title claims description 4
- 230000003647 oxidation Effects 0.000 title claims description 4
- 238000007254 oxidation reaction Methods 0.000 title claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims description 3
- 238000000034 method Methods 0.000 title claims description 3
- 239000001301 oxygen Substances 0.000 title claims description 3
- 229910052760 oxygen Inorganic materials 0.000 title claims description 3
- 238000002360 preparation method Methods 0.000 title claims description 3
- 239000007789 gas Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 239000010953 base metal Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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
- C01B21/24—Nitric oxide (NO)
- C01B21/26—Preparation by catalytic or non-catalytic oxidation of ammonia
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Incineration Of Waste (AREA)
Description
Verfahren zur Darstellung von Stickoxyden durch katalytische Oxydation von Ammoniak durch Luft oder Sauerstoff. Bei der Darstellung von Stickoxyden durch katalytische Oxydation von Ammoniak mittels in Schichtform verwendeter Kontaktmassen, wie solche insbesondere bei Benutzung von Eisen oder anderen unedlen Metallen oder deren Oxyden in Stücken in Betracht kommen, in größerem Maßstabe tritt, auch wenn das Gasgemisch auf die übliche Temperatur vorgewärmt wurde, leicht eine Ausbeuteverminderung ein. Wie sich gezeigt hat, beruht diese darauf, daß eine Ableitung der Wärme von der Oberfläche nach den inneren Schichten der Kontaktmasse und dadurch eine zu starke Abkühlung der vom Gasstrom zuerst getroffenen Teile des Kontaktes stattfindet, so daß die Reaktion nicht mehr der Hauptsache nach an der Oberfläche, sondern erst in tieferen Schichten der Kontaktmasse erfolgt, was schädlich ist und zum völligen Erlöschen des Kontaktes führen kann.Process for the preparation of nitrogen oxides by catalytic oxidation from ammonia through air or oxygen. In the representation of nitrogen oxides through catalytic oxidation of ammonia by means of contact masses used in layer form, such as those in particular when using iron or other base metals or whose oxides come into consideration in pieces, occurs on a larger scale, even if the gas mixture was preheated to the usual temperature, a slight decrease in the yield a. As has been shown, this is based on the fact that a dissipation of heat from the surface after the inner layers of the contact compound and thus too strong Cooling of the parts of the contact hit first by the gas flow takes place, so that the reaction is no longer mainly on the surface, but only in deeper layers of the contact mass takes place, which is harmful and to the complete Can lead to loss of contact.
Es hat sich nun gezeigt, daß man diesen Nachteilen dadurch begegnen kann, daß man die Reaktionskammer vor dem Kontakt derart geräumig ausbildet, daß durch die von dem glühenden Kontakt ausgehende Strahlung eine weitere Aufheizung des mit etwa 4oo° Vorwärmung eintretenden Gasgemisches auf eine Temperatur von etwa goo° und darüber erfolgt. Hierbei findet eine Zerstörung von Ammoniak praktisch nicht statt.It has now been shown that these disadvantages can be countered in this way can that the reaction chamber is formed so spacious before contact that the radiation emanating from the glowing contact causes further heating of the gas mixture entering with about 4oo ° preheating to a temperature of about goo ° and above takes place. Here, destruction of ammonia comes in handy does not take place.
Man verfährt praktisch z. B. in der Weise, daß man das auf q.00° vorgeheizte Gas aus der Leitung in eine weite und lange vertikal gerichtete Kammer oben einführt, in deren unterem Teil sich die Kontaktmasse befindet. Das Gas gelangt z. B. mit 55o° an diese. Man hat hierbei noch den Vorteil, daß in der längeren Gasstrecke die am Eingang zur Reaktionskammer häufig ungleichförmige Gasbewegung immer gleichmäßiger wird, was für die Reaktion gleichfalls günstig ist.One proceeds practically z. B. in such a way that the preheated to q.00 ° Introduces gas from the line into a wide and long vertically directed chamber at the top, in the lower part of which there is the contact mass. The gas reaches z. B. with 55o ° to this. One still has the advantage that in the longer gas section the often non-uniform gas movement at the entrance to the reaction chamber becomes more and more uniform becomes, which is also favorable for the reaction.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB78808D DE366366C (en) | 1915-01-08 | 1915-01-08 | Process for the preparation of nitrogen oxides by catalytic oxidation of ammonia by air or oxygen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB78808D DE366366C (en) | 1915-01-08 | 1915-01-08 | Process for the preparation of nitrogen oxides by catalytic oxidation of ammonia by air or oxygen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE366366C true DE366366C (en) | 1923-01-08 |
Family
ID=6980035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEB78808D Expired DE366366C (en) | 1915-01-08 | 1915-01-08 | Process for the preparation of nitrogen oxides by catalytic oxidation of ammonia by air or oxygen |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE366366C (en) |
-
1915
- 1915-01-08 DE DEB78808D patent/DE366366C/en not_active Expired
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