AT64227B - Process for the preparation of ammonium sulfate from ammonium bisulfite. - Google Patents

Process for the preparation of ammonium sulfate from ammonium bisulfite.

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Publication number
AT64227B
AT64227B AT64227DA AT64227B AT 64227 B AT64227 B AT 64227B AT 64227D A AT64227D A AT 64227DA AT 64227 B AT64227 B AT 64227B
Authority
AT
Austria
Prior art keywords
ammonium
bisulfite
preparation
ammonium bisulfite
ammonium sulfate
Prior art date
Application number
Other languages
German (de)
Original Assignee
Basf Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Basf Ag filed Critical Basf Ag
Application granted granted Critical
Publication of AT64227B publication Critical patent/AT64227B/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

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 Temperatur von 70 bis   800   nicht überschritten wird ; erst nach Ablauf der Hauptreaktion lässt man eventuell die Temperatur auf 100 bis 1200 steigen und arbeitet dann das Reaktionsgemisch auf. 



   Beispiel 3 :
Das Durchleiten der Ammoniumbisulfitlösung durch Apparate, welche das örtliche Erhitzen auf die Reaktionstemperatur gestatten, kann z. B. in der Weise ausgeführt werden, dass man eine zweckmässig konzentrierte Lösung von   Ammoniumbisuint   mit Hilfe einer Pumpe durch ein auf zirka 1500 geheiztes und unter Druck gehaltenes Rohrsystem hindurchpumpt.   Die Umwandlung des Ammoniumbisulfits   erfolgt in kurzer Zeit während des Durchfliessens, so dass am Ende des Rohrsystems die fertig umgesetzte Lösung von Ammoniumsulfat austritt. Zweckmässig arbeitet man, aus Gründen der Wärmeökonomie, im Gegenstrom, d. h. man gibt der aus dem Apparat austretenden Lösung Gelegenheit, ihre Wärme an die eintretende Lösung abzugeben.

   Diese Arbeitsweise gestattet, mit verhältnismässig kleinen und betriebssicheren Vorrichtungen auszukommen, was bei der Schwierigkeit, für die Behandlung der sauren Lösungen unter Druck bei hohen Temperaturen geeignete Materialien zu finden, von grossem Vorteil ist. 



   PATENT-ANSPRÜCHE :
1. Verfahren zur Darstellung von Ammoniumsulfat aus Ammoniumblsulfit, dadurch gekennzeichnet, dass man Lösungen von Ammoniumbisulfit oder von Gemischen desselben mit neutralem Ammoniumsulfat in Gegenwart von zugesetzten Katalysatoren erhitzt.



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 Temperature of 70 to 800 is not exceeded; only after the main reaction has ended is the temperature possibly allowed to rise to 100 to 1200 and the reaction mixture then worked up.



   Example 3:
Passing the ammonium bisulfite solution through apparatuses which allow local heating to the reaction temperature can, for. B. can be carried out in such a way that a suitably concentrated solution of ammonium bisuint is pumped through a pipe system heated to around 1500 and kept under pressure with the aid of a pump. The conversion of the ammonium bisulfite takes place in a short time while it is flowing through, so that the completely converted solution of ammonium sulfate emerges at the end of the pipe system. For reasons of heat economy, it is advisable to work in countercurrent, i. H. the solution emerging from the apparatus is given the opportunity to give off its heat to the incoming solution.

   This mode of operation makes it possible to manage with relatively small and operationally reliable devices, which is of great advantage in view of the difficulty of finding suitable materials for treating the acidic solutions under pressure at high temperatures.



   PATENT CLAIMS:
1. A process for the preparation of ammonium sulfate from ammonium bsulfite, characterized in that solutions of ammonium bisulfite or of mixtures thereof with neutral ammonium sulfate are heated in the presence of added catalysts.

 

Claims (1)

2. Ausführungsform des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass man zu einer aus bereits umgesetztem Ammoniumbisulfit bestehenden Flüssigkeit neue Mengen von Ammoniumbisulfitlösung zuführt. 2. Embodiment of the method according to claim 1, characterized in that new amounts of ammonium bisulfite solution are added to a liquid consisting of already converted ammonium bisulfite. 3. Abänderung des Verfahrens nach Anspruch 1. dadurch gekennzeichnet, dass man die Lösungen von Ammoniumbisulfit oder von dessen Gemischen mit neutralen Ammonium- sulfit in Gegenwart oder Abwesenheit von Katalysatoren stetig durch einen das ortl1che Erhitzen auf die Reaktiunstemperatur gestattenden Apparat, z. 1J. ein druckfestes Rohr- System, leitet. 3. Modification of the process according to claim 1, characterized in that the solutions of ammonium bisulfite or of its mixtures with neutral ammonium sulfite in the presence or absence of catalysts are continuously passed through the ortl1che Apparatus allowing heating to the reaction temperature, e.g. 1y. a pressure-resistant pipe System, directs.
AT64227D 1912-01-27 1912-12-30 Process for the preparation of ammonium sulfate from ammonium bisulfite. AT64227B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE64227X 1912-01-27

Publications (1)

Publication Number Publication Date
AT64227B true AT64227B (en) 1914-04-10

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ID=5632375

Family Applications (1)

Application Number Title Priority Date Filing Date
AT64227D AT64227B (en) 1912-01-27 1912-12-30 Process for the preparation of ammonium sulfate from ammonium bisulfite.

Country Status (1)

Country Link
AT (1) AT64227B (en)

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