AT48815B - Process for concentrating aqueous nitric acid with the aid of sulfuric acid or other suitable water-attracting agents. - Google Patents
Process for concentrating aqueous nitric acid with the aid of sulfuric acid or other suitable water-attracting agents.Info
- Publication number
- AT48815B AT48815B AT48815DA AT48815B AT 48815 B AT48815 B AT 48815B AT 48815D A AT48815D A AT 48815DA AT 48815 B AT48815 B AT 48815B
- Authority
- AT
- Austria
- Prior art keywords
- nitric acid
- aid
- suitable water
- aqueous nitric
- sulfuric acid
- Prior art date
Links
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 title claims description 8
- 229910017604 nitric acid Inorganic materials 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 7
- 239000003795 chemical substances by application Substances 0.000 title claims 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 claims 1
- 239000011593 sulfur Substances 0.000 claims 1
- 239000002253 acid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
Description
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angestrebten Endzustände usw. nämlich :
1. die nach den gegebenen Umständen, d. h. Mischungsverhältnis usw. mögliche Höchstkonzentration der Salpetersäure einerseits und 2. die Austreibung der letzten Spuren von Salpetersäure aus der Schwefelsäure andererseits.
Es könnte den Anschein haben, als ob das Verfahren mit den bekannten Denitrierungon identisch sei. Es kann jedoch gar keinem Zweifel unterliegen, dass speziell die bei der Denitrierung erzielten Resultate von vorneherein die Aussicht auf eine rationelle KonZentrierung wässeriger Salpetersäure mittels Schwefelsäure und Abtreiben durch Wasserdampf ausschliessen, denn einerseits erzielt man eine Salpetersäure von höchstens 6'20/0 aus einer Denitriersäure und andererseits muss man die aus der Denitriertrommel abfliessende Schwefelsäure mit derartig viel Wasserdampf behandeln, dass ihre Konzentration auf 650/u' 77 S 0, besser aber noch weiter herabgedruckt wird.
Das beste Resultat erzielt man, wenn man eine Mischung von Salpetersäure und
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zwar wird sämtliche Salpetersäure restlos und ohne Nachlauf als hochprozentige Säure gewonnen, ein Erfolg, der weder mit irgend welchem bis jetzt bekannten Konzentrationverfahren, noch auch mit der bei der Denitrierung üblichen Arbeitsweise und den dabei benutzten Ausgangsmaterialien erzielt worden ist.
Am einfachsten führt man das Verfahren derart aus, dass man in einem vertikalen, mit entsprechenden Füllkörpern beschickten Rohre von im Verhältnis zum verarbeiteten Quantum stehenden Querschnitt und Länge, das (gemisch oben aufgibt, während man unten getrockneten Wasserdampf einführt. Es ist selbstverständlich von Vorteil, den Wassodampf zu überhitzen, doch ist die Überhitzung ohne Bedeutung für das Wesen des Verfahrens.
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desired final states etc. namely:
1. according to the given circumstances, d. H. Mixing ratio etc. possible maximum concentration of nitric acid on the one hand and 2. the expulsion of the last traces of nitric acid from the sulfuric acid on the other hand.
It may appear that the process is identical to the known denitration. However, there can be absolutely no doubt that the results obtained in denitration in particular rule out the prospect of rational concentration of aqueous nitric acid by means of sulfuric acid and removal by steam, because on the one hand a nitric acid of at most 6.20 / 0 is obtained from a denitration acid and on the other hand, the sulfuric acid flowing out of the denitration drum has to be treated with so much steam that its concentration is reduced to 650 / u '77 S 0, or better still further.
The best result is achieved by using a mixture of nitric acid and
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it is true that all nitric acid is obtained completely and without any after-run as a high-percentage acid, a success that has not been achieved with any previously known concentration method, nor with the usual method of denitration and the starting materials used.
The simplest way to carry out the process is to put the mixture at the top, while the dried steam is introduced at the bottom in a vertical tube, charged with appropriate packing, of cross-section and length in relation to the quantity processed. to overheat the water vapor, but the overheating is of no importance to the essence of the process.
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Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT48815T | 1910-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT48815B true AT48815B (en) | 1911-07-10 |
Family
ID=3569420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT48815D AT48815B (en) | 1910-09-26 | 1910-09-26 | Process for concentrating aqueous nitric acid with the aid of sulfuric acid or other suitable water-attracting agents. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT48815B (en) |
-
1910
- 1910-09-26 AT AT48815D patent/AT48815B/en active
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