DE478676C - Process for washing out cyano compounds, ammonia and hydrogen sulfide from gases by means of solutions containing iron oxide - Google Patents
Process for washing out cyano compounds, ammonia and hydrogen sulfide from gases by means of solutions containing iron oxideInfo
- Publication number
- DE478676C DE478676C DEB133749D DEB0133749D DE478676C DE 478676 C DE478676 C DE 478676C DE B133749 D DEB133749 D DE B133749D DE B0133749 D DEB0133749 D DE B0133749D DE 478676 C DE478676 C DE 478676C
- Authority
- DE
- Germany
- Prior art keywords
- ammonia
- hydrogen sulfide
- gases
- iron oxide
- solutions containing
- 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
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
- C10K1/12—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors
- C10K1/124—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors containing metal compounds other than alkali- or earth-alkali carbonates, hydroxides- or oxides- or salts of inorganic acids derived from sulfur
- C10K1/125—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors containing metal compounds other than alkali- or earth-alkali carbonates, hydroxides- or oxides- or salts of inorganic acids derived from sulfur containing Fe compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Industrial Gases (AREA)
Description
Verfahren zum Auswaschen von Cyanverbindungen, Ammoniak und Schwefelwasserstoff aus Gasen mittels eisenoxydulhaltiger Lösungen Nach dem Hauptpatent 415 2o6 werden Cyanverbindungen, Ammoniak und Schwefelwasserstoff mittels eisenoxydulhaltiger Lösungen aus Gasen ausgewaschen und die ausgebrauchte Waschlauge durch Zusatz geeigneter Säuren zum Waschen wieder tauglich gemacht. Bei dieser Führung des Verfahrens wird nur so viel Schwefelsäure mit ausgewaschen, wie dem im Gas enthaltenen Ammoniak nach Abzug des für die Cyanverbindung verbrauchten äquivalent ist.- Um mehr als diese Menge Schwefelwasserstoff in Schwefeleisen zu verwandeln, setzt man dem Gas oder der Waschlauge entsprechende Mengen Ammoniak zu.Process for washing out cyano compounds, ammonia and hydrogen sulfide from gases by means of solutions containing iron oxide According to the main patent 415 2o6 Cyano compounds, ammonia and hydrogen sulfide using solutions containing iron oxide washed out of gases and the used washing liquor by adding suitable Acids made suitable for washing again. In this conduct of the procedure will only as much sulfuric acid is washed out as the ammonia contained in the gas after subtracting the amount consumed for the cyano compound is equivalent.- By more than to convert this amount of hydrogen sulphide into iron sulphide is put into the gas or add appropriate amounts of ammonia to the washing liquor.
In den Betrieben, für die das Verfahren in Frage kommt, verfügt man gewöhnlich nicht über genügend Ammoniak, um nennenswerte Mengen oder gar die Gesamtheit des Schwefelwasserstoffs aus dem Gas auswaschen zu können. Man muß daher entweder einen Teil der an fallenden Ammoniumsalze mit Kalk zersetzen oder Ammoniak hinzukaufen. Beides ist aber teuer und macht das Verfahren unwirtschaftlich.In the establishments for which the process comes into question, one has usually not enough ammonia to make up any appreciable amount or all of it to be able to wash out the hydrogen sulfide from the gas. So you have to either decompose some of the ammonium salts with lime or buy ammonia. However, both are expensive and make the process uneconomical.
Die Erfindung besteht nun darin, daß bei einem Verfahren nach dem Hauptpatent das zur Auswaschung des Schwefelwasserstoffs erforderliche Zusatzammoniak aus Ammoniumsulfat durch Zersetzung in der Wärme gewonnen und- das dabei entstehende Ammoniumbisulfat vorzugsweise zum Behandeln der benutzten Waschlauge verwendet wird.The invention consists in that in a method according to the The main patent is the additional ammonia required to wash out the hydrogen sulfide Obtained from ammonium sulphate by decomposition in the heat and the resulting Ammonium bisulfate is preferably used to treat the washing liquor used.
Die Wirtschaftlichkeit des Hauptverfahrens wird ferner noch dadurch beeinträchtigt, daß man die Ammoniumsulfatlösung zur Gewinnung des festen Salzes völlig eindampfen muß, auch die vorstehend mitgeteilte Abänderung ändert daran nichts. Man kann es dabei nicht vermeiden, Wasser in den Arbeitsgang einzuführen, weil es sich in der Praxis als zweckmäßig erwiesen hat, sowohl das Ammoniak als das Ammoniumbisulfat in Form wäßriger Lösung anzuwenden. Damit soll natürlich die Anwendung der Gas- bzw. festen Form nicht ausgeschlossen sein.The economy of the main process is further enhanced by it affects the fact that you use the ammonium sulfate solution to obtain the solid salt has to evaporate completely, even the amendment communicated above does not change this. One cannot avoid introducing water into the process because it has proven to be useful in practice, both the ammonia and the ammonium bisulfate to be used in the form of an aqueous solution. This is of course intended to enable the use of gas or fixed form cannot be excluded.
Gemäß der weiteren Erfindung soll nun das Ammoniumsulfat gewonnen werden, indem in die Ammoniumsulfatlösung Ammoniak eingeleitet und dadurch das Ammoniumsulfat abgeschieden wird. Die vom Salz getrennte ammoniakreiche Mutterlauge kann dann als Zusatzammoniak für den Waschvorgang dienen. Es kann das Ammoniumsulfat in der Weise gewonnen werden, daß von der ausgebrachten Waschlauge nach dem Absitzen diejenige Menge klarer Flüssigkeit abgezogen wird, die so viel Ammoniumsulfat enthält, wie erforderlich ist, um das aufs dem Gasamnibliak entstandene und das zur Herstellung des Zusatzammoniaks erforderliche Sülfat zu gewinnen.According to the further invention, the ammonium sulfate is now to be obtained by introducing ammonia into the ammonium sulfate solution and thereby the ammonium sulfate is deposited. The ammonia-rich mother liquor separated from the salt can then be used as Additional ammonia are used for the washing process. It can get the ammonium sulfate in the way be obtained that of the applied wash liquor after settling the one Amount of clear liquid is withdrawn that much Ammonium sulfate contains, as is necessary, in order to deal with the gas amnibliak and the to obtain the sulphate required for the production of the additional ammonia.
Die Lösung wird mit Schwefelsäure genau neutralisiert, falls erforderlich, eingeengt und darauf Ammoniak eingeleitet. Mit steigender Ammoniakkonzentration nimmt die Sulfatlöslichkeit ab, bei 30°o NH3-Gehalt ist das Sulfat unlöslich. Es scheidet sich kristallinisch ab, kann abgeschleudert oder abgenutscht, gewaschen und darauf nach Bedarf verwandt werden. Die ammoniakreiche Mutterlauge wird dem Waschvorgang wieder zugeführt und dient dort zur Deckung des Bedarfs an Zusatzammoniak. Ein etwaiger Gehalt an Ammoniumsulfat ist dabei unschädlich, man kann die Mengen- und Konzentrationsverhältnisse daher auf das Zusatzammoniak und die auszuscheidende Sulfatmenge abstimmen.The solution is precisely neutralized with sulfuric acid, if necessary, concentrated and then introduced ammonia. With increasing ammonia concentration the sulphate solubility decreases, at 30 ° o NH3 the sulphate is insoluble. It separates in crystalline form, can be spun off or sucked off, washed and used on it as needed. The ammonia-rich mother liquor is the The washing process is supplied again and is used there to cover the need for additional ammonia. Any ammonium sulfate content is harmless, you can determine the amount and concentration ratios therefore depend on the additional ammonia and the ammonia to be eliminated Adjust the amount of sulphate.
Nach dem Verfahren der vorliegenden Erfindung gelingt es, die restlose Absorption von Ammoniak, Cyanverbindungen und Schwefelwasserstoff in einem Arbeitsgang und in einem Wascher auszuführen und die Aufbereitung der Waschlauge mit der Fabrikation des Ammoniumsulfates zu verbinden. Jeglicher Aufwand von Gasreinigungsmasse oder Chemikalien für die Absorption des Schwefelwasserstoffs fällt weg, an seine Stelle tritt nur Wärmeaufwand. Der Schwefel fällt als Schwefelwasserstoff an und kann aus diesem auf bekannte Weise als reiner Schwefel gewonnen werden. Es werden daher den bekannten Verfahien dieser Art gegenüber neue besondere Wirkungen erzielt.According to the method of the present invention, it is possible to remove the residue Absorption of ammonia, cyano compounds and hydrogen sulfide in one operation and to be carried out in a washer and the preparation of the washing liquor with the fabrication to connect the ammonium sulfate. Any expenditure of gas cleaning compound or Chemicals for the absorption of the hydrogen sulfide are omitted in its place occurs only heat expenditure. The sulfur is obtained as hydrogen sulfide and can precipitate this can be obtained in a known manner as pure sulfur. It will therefore be the known processes of this type compared to new special effects achieved.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB133749D DE478676C (en) | 1927-10-06 | 1927-10-06 | Process for washing out cyano compounds, ammonia and hydrogen sulfide from gases by means of solutions containing iron oxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB133749D DE478676C (en) | 1927-10-06 | 1927-10-06 | Process for washing out cyano compounds, ammonia and hydrogen sulfide from gases by means of solutions containing iron oxide |
Publications (1)
Publication Number | Publication Date |
---|---|
DE478676C true DE478676C (en) | 1931-06-26 |
Family
ID=6998378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB133749D Expired DE478676C (en) | 1927-10-06 | 1927-10-06 | Process for washing out cyano compounds, ammonia and hydrogen sulfide from gases by means of solutions containing iron oxide |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE478676C (en) |
-
1927
- 1927-10-06 DE DEB133749D patent/DE478676C/en not_active Expired
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