AT79944B - Process for the oxidation of ammonium sulphite to ammonium process for the oxidation of ammonium sulphite to ammonium sulphate. sodium sulfate. - Google Patents
Process for the oxidation of ammonium sulphite to ammonium process for the oxidation of ammonium sulphite to ammonium sulphate. sodium sulfate.Info
- Publication number
- AT79944B AT79944B AT79944DA AT79944B AT 79944 B AT79944 B AT 79944B AT 79944D A AT79944D A AT 79944DA AT 79944 B AT79944 B AT 79944B
- Authority
- AT
- Austria
- Prior art keywords
- ammonium
- oxidation
- sulphite
- oxygen
- sulphate
- Prior art date
Links
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 title claims description 15
- 230000003647 oxidation Effects 0.000 title claims description 12
- 238000007254 oxidation reaction Methods 0.000 title claims description 12
- 238000000034 method Methods 0.000 title claims description 8
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 title claims description 4
- 229910052921 ammonium sulfate Inorganic materials 0.000 title claims description 4
- 235000011130 ammonium sulphate Nutrition 0.000 title claims description 4
- 239000001166 ammonium sulphate Substances 0.000 title claims 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 title 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 title 1
- 229910052938 sodium sulfate Inorganic materials 0.000 title 1
- 235000011152 sodium sulphate Nutrition 0.000 title 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 2
- 239000003570 air Substances 0.000 claims 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims 1
- 150000001342 alkaline earth metals Chemical class 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 5
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- -1 ammonium sulfite Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Oxydation von Ammoniumsulfit zu Ammoniumsulfat.
Es ist bekannt, dass sich die Alkalisulfite, einschliesslich Ammoniumsulfit, durch Sauerstoff zu Sulfat oxydieren lassen. Die Oxydation geht aber langsam vor sich. besonders bei Verwendung von Luft als sauerstoffhaltiges Mittel. Da ferner das Ammoniumsulfit z. B. in der angewandten wässerigen Lösung weitgehend hydwlytisch gespalten ist. nimmt der unverbrauchte Luftrpst Ammoniak mit toit. Dieser Übelstand lässt sich fast ausschalten, wenn die Oxydation sehr schnell verläuft, da Ammoniumsulfat einen viel geringeren NH3-Druck aufweist. als das Sulfit.
Das vorliegende Verfahren beruht auf der neuen Erkenntnis, dass die Oxydation des Ammoniumsulfits durch Sauerstoff oder sauerstoffhaltige Gase. wie Luft. dadurch wesentlich beschleunigt wenden kann. dass die Oxydation in Gegenwart von E'dalkalisulfat. z. B. Calciumsulfat. stattfindet. Zu dem Zwecke lässt man die Lösung von z. B. Ammoniumsulfit übe-'Gips rieseln unter gleichzeitigem Einleiten von Sauerstoff oder Luft. Das Erdalkalisulfat wirkt hiebei
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oxydieren lässt als Ammoniumsulfit und bei der Berührung mit Ammoniumsulfit diesem den aufgenommenen Saue : stoff sofort übe : trägt.
Der Vorgang verläuft also in seiner ersten Phase entsprechend derersten Phase der deutschen
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nämlich durch Oxydation mit gleichzeitig mit dem Ammoniumsulfit eingeführten Sauerstoff.
Dabei bildet sich. und das ist der wesentliche Unterschied gegen alle bekanntgewordenen Angaben
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Verhältnis nach der Formel :
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angewendet werden muss. dass hier dagegen die einmal in den Oxydationsapparat eingeführt Gipsmenge dauernd wirksam bleibt, ohne ersetzt, oder wie im Patente Nr. 279953. in einer getrennten Operation regeneriert werden zu müssen ; das wird durch das gleichzeitige Einleiten von Luft bewirkt.
Die Ausführung des vorliegenden Verfahrens kann beispielsweise folgendermassen erfolg en :
Die Ammoniumsulfitlösung von beispielsweise 50% (NH4)2SO2 wird durch einen Rieselturm geleitet, der mit Gipsstücken gefüllt ist. Gleichzeitig wird Luft eingeleitet. Das Ammoniumsulfit setzt sich mit der Oberflächenschicht des Gipses zu Sulfat um. die dadurch entstehende
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Temperatur liegt zwischen 50 und 70 , die nötige Wärme liefert die Reaktion selber. In einem Turm von 3 M Höhe konnte man auf diese Weise leicht 500 I Lösung mit 250 kg Sulfit in einer Stunde zu Sulfat umsetzen, d. h. in einem Tage mehr als 6000 kg. Die oberste Grenze der Leistung- fähigkeit war damit aber noch nicht erreicht.
Ein wesentlicher Unterschied gegen alle bisher bekannt gewordenen Verfahren zur Oxydation von Ammoniumsulfit liegt darin, dass man mit der gleichen Turmfüllung monate- oder jahrehing arbeiten kann. ohne eine Regeneration vornehmen zu müssen, so dass man mit derselben Gips-
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**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for the oxidation of ammonium sulfite to ammonium sulfate.
It is known that alkali sulfites, including ammonium sulfite, can be oxidized to sulfate by oxygen. The oxidation takes place slowly. especially when using air as an oxygen-containing agent. Furthermore, since the ammonium sulfite z. B. is largely hydwlytically split in the applied aqueous solution. the unused air cap takes ammonia with toit. This inconvenience can almost be eliminated if the oxidation proceeds very quickly, since ammonium sulfate has a much lower NH3 pressure. than the sulfite.
The present method is based on the new knowledge that the oxidation of ammonium sulfite by oxygen or oxygen-containing gases. like air. can turn much faster. that the oxidation in the presence of E'dalkali sulfate. z. B. calcium sulfate. takes place. For this purpose one leaves the solution of z. B. ammonium sulfite übe-'gypsum trickle with the simultaneous introduction of oxygen or air. The alkaline earth sulfate works here
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can oxidize as ammonium sulphite and on contact with ammonium sulphite this immediately transfers the absorbed oxygen.
The process thus proceeds in its first phase corresponding to the first phase of the German
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namely by oxidation with oxygen introduced at the same time as the ammonium sulfite.
This forms. and that is the essential difference compared to all known information
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Ratio according to the formula:
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must be applied. that here, on the other hand, the amount of gypsum once it has been introduced into the oxidation apparatus remains permanently effective without having to be replaced or, as in patent no. 279953, to be regenerated in a separate operation; this is brought about by the simultaneous introduction of air.
The present method can for example be carried out as follows:
The ammonium sulfite solution of 50% (NH4) 2SO2, for example, is passed through a trickle tower that is filled with pieces of plaster. Air is introduced at the same time. The ammonium sulfite reacts with the surface layer of the gypsum to form sulfate. the resulting
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The temperature is between 50 and 70, the reaction itself provides the necessary heat. In this way, in a tower 3 m high, it was easy to convert 500 l of solution with 250 kg of sulphite to sulphate in one hour; H. more than 6000 kg in one day. The uppermost limit of performance was not yet reached.
An essential difference compared to all previously known processes for the oxidation of ammonium sulfite is that you can work with the same tower filling for months or years. without having to perform a regeneration, so that one can use the same plaster
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** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH79944X | 1916-04-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT79944B true AT79944B (en) | 1920-01-26 |
Family
ID=4333514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT79944D AT79944B (en) | 1916-04-25 | 1917-03-10 | Process for the oxidation of ammonium sulphite to ammonium process for the oxidation of ammonium sulphite to ammonium sulphate. sodium sulfate. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT79944B (en) |
-
1917
- 1917-03-10 AT AT79944D patent/AT79944B/en active
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