DE418428C - Production of pure concentrated nitric acid - Google Patents
Production of pure concentrated nitric acidInfo
- Publication number
- DE418428C DE418428C DEB117129D DEB0117129D DE418428C DE 418428 C DE418428 C DE 418428C DE B117129 D DEB117129 D DE B117129D DE B0117129 D DEB0117129 D DE B0117129D DE 418428 C DE418428 C DE 418428C
- Authority
- DE
- Germany
- Prior art keywords
- nitric acid
- concentrated nitric
- production
- pure concentrated
- pure
- 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
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Herstellung reiner konzentrierter Salpetersäure. Bei der Herstellung reiner konzentrierter Salpetersäure war es bisher üblich, rohe konzentrierte Salpetersäure, die höher als Salpetersäure siedende Bestandteile enthielt, z. B. Beimengungen der als Konzentrationsmittel benutzten Schwefelsäure oder andere höhersiedende Anteile, unter besonderen Vorsichtsmaßregeln abzudestillieren und wieder zu kondensieren.Production of pure concentrated nitric acid. In the preparation of pure concentrated nitric acid, it was customary up to now to use raw concentrated nitric acid, which contained components boiling higher than nitric acid, e.g. B. Additions of sulfuric acid or other higher-boiling components used as a concentration medium, to distill and condense again under special precautionary measures.
Es wurde nun gefunden, daß man aus höhersiedende Bestandteile enthaltender konzentrierter Salpetersäure, wie man sie z. B. bei der Konzentration verdünnter Salpetersäure mit Schwefelsäure erhält, direkt reine konzentrierte Salpetersäure gewinnen kann, wenn man sie in Dampfform mit siedend heißer konzentrierter Salpetersäure wäscht. In der zum Waschen benutzten Salpetersäure werden in erster Linie die höhersiedenden Anteile des Dampfes kondensiert und zurückgehalten. Man kann so bei genügend intensiver Waschung in einem Arbeitsgang unmittelbar zu praktisch reiner konzentrierter Salpetersäure gelangen. Sofern der so behandelten Salpetersäure noch Stickoxyde beigemengt sind, kann man diese, wie auch bei sonstiger nitrosehaltiger Salpetersäure, z. B. in der Weise entfernen, daß man das noch heiße Kondensat mit entgegenströmendem reinen Salpetersäuredampf in einer geeigneten Vorrichtung, z. B. einem mit Raschigringen gefüllten, mit einem Räckflußkühler verbundenen Rieselturm, ausbläst. Durch Kombination dieses Reinigungsverfahrens mit der Salpetersäurekonzentration gelingt es beispielsweise, aus der Salpetersäurekonzentrations-Apparatur direkt ohne nochmaliges Verdampfen fast wasserklare, praktisch reine und schwefelsäurefreie konzentrierte Salpetersäure zu gewinnen.It has now been found that higher-boiling constituents can be obtained from concentrated nitric acid, as it is used e.g. B. diluted in concentration Nitric acid with sulfuric acid is obtained directly, pure concentrated nitric acid can be won if you steam them with boiling hot concentrated nitric acid washes. In the nitric acid used for washing, the higher-boiling ones are primarily used Portions of the steam condensed and retained. You can do this with enough intensity One-step washing immediately to form practically pure concentrated nitric acid reach. If the nitric acid treated in this way is also mixed with nitrogen oxides, you can this, as with other nitrous-containing nitric acid, z. B. in the Remove way that you can clean the still hot condensate with countercurrent Nitric acid vapor in a suitable device, e.g. B. one with Raschig rings filled trickle tower connected to a return flow cooler, blows out. By combination this cleaning process with the nitric acid concentration succeeds, for example, from the nitric acid concentration apparatus directly without repeated evaporation almost water-clear, practically pure and sulfuric acid-free concentrated nitric acid to win.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB117129D DE418428C (en) | 1924-12-16 | 1924-12-16 | Production of pure concentrated nitric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB117129D DE418428C (en) | 1924-12-16 | 1924-12-16 | Production of pure concentrated nitric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE418428C true DE418428C (en) | 1925-09-05 |
Family
ID=6994469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEB117129D Expired DE418428C (en) | 1924-12-16 | 1924-12-16 | Production of pure concentrated nitric acid |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE418428C (en) |
-
1924
- 1924-12-16 DE DEB117129D patent/DE418428C/en not_active Expired
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