DE2528733A1 - Organically substd. hydrazine mfr. - involves finely dividing liq. phase when adding chloroamine - Google Patents

Organically substd. hydrazine mfr. - involves finely dividing liq. phase when adding chloroamine

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Publication number
DE2528733A1
DE2528733A1 DE19752528733 DE2528733A DE2528733A1 DE 2528733 A1 DE2528733 A1 DE 2528733A1 DE 19752528733 DE19752528733 DE 19752528733 DE 2528733 A DE2528733 A DE 2528733A DE 2528733 A1 DE2528733 A1 DE 2528733A1
Authority
DE
Germany
Prior art keywords
hydrazine
liq
phase
amine
chloroamine
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.)
Withdrawn
Application number
DE19752528733
Other languages
German (de)
Inventor
Hermann Dipl Chem Clasen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst 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 Hoechst AG filed Critical Hoechst AG
Priority to DE19752528733 priority Critical patent/DE2528733A1/en
Publication of DE2528733A1 publication Critical patent/DE2528733A1/en
Withdrawn legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C241/00Preparation of compounds containing chains of nitrogen atoms singly-bound to each other, e.g. hydrazines, triazanes
    • C07C241/02Preparation of hydrazines

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The hydrazine is made by adding chloroamine opt. mono-or di-substd. with alkyl, to a water-free, liq. prim. or sec. amine which is intensively stirred. Specif. the liq., whilst being mixed with the amine, is finely divided. This division may be accomplished by passing the reactants down a vertically aligned venturi. By finely dividing the amine, contact of the latter with the prod. is reduced and interaction avoided. If desired the amine may be used dissolved in an inert solvent.

Description

"Verfahren zur Herstellung von organischen Hydrazinen' Zusatz zu Patent Nr . ... ... (Patentanmeldung P 24 40 238.8) Gegenstand des Patents Nr. . ... ... (Patent anmeldung P 24 40 238.£) ist ein Verfahren zur Herstellung organisch substituierter Ilydrazine durch Einführen von unsubstituiertem oder durch eine oder ze Alkylgruppen substituiertem Chloramin in eine flüssige, im wesentlichen wasserfreie Phase aus flüssigem oder in einem inerten Lösungsmittel gelöstem primären oder sekundären nmi, das dadurch gekennzeichnet ist, daß die flüssige Phase während des Einführens des Chloramins intensiv bewegt wird. Vorzugsweise wird unsubstituiertes Chloramin in im wesentlichen wasserfreies Anilin eingeführt, wobei die Konzentration des bei dieser Umsetzung gebildeten Phenylhydrazins in der flüssigen Phase nicht höher als etwa 6 Gew.% steigen soll."Process for Making Organic Hydrazines' Addendum to Patent No . ... ... (patent application P 24 40 238.8) Subject of patent no. ... ... (Patent registration P 24 40 238. £) is a process for the production of organically substituted Ilydrazine by introducing unsubstituted or one or two alkyl groups substituted chloramine into a liquid, essentially anhydrous phase primary or secondary liquid or dissolved in an inert solvent nmi, which is characterized in that the liquid phase during the introduction of the chloramine is moved intensively. Unsubstituted chloramine is preferred introduced in essentially anhydrous aniline, the concentration of the in this reaction formed phenylhydrazine in the liquid phase not higher than to increase about 6 wt.%.

Die intensive Bewegung der flüssigen Phase geschieht insbesondere durch Rühren und/oder Umpumpen und/oder Eindüsen und/oer intensives Schütteln der Flüssigkeit im Vibrationsmischer.The intense movement of the liquid phase happens in particular by stirring and / or pumping and / or injecting and / or intensive shaking of the Liquid in the vibratory mixer.

Durch die intensive Bewegung der flüssigen Phase wird verhindert, daß das gebildete organisch substituierte Hydrazin mit dem eingeführten Chloramin weiter in Kontakt bleibt. Dies ist sehr wichtig, d@ das Chloramin mit dem organischen Hydrazin sebnaller reagiert als mit dem in der flüssigen Phase vorhande nan prinäure oder sekundären Amin.The intense movement of the liquid phase prevents that the organically substituted hydrazine formed with the introduced chloramine keep in touch. This is very important d @ the chloramine with the organic Hydrazine reacts more quickly than with the nanopric acid present in the liquid phase or secondary amine.

In weiterer Ansbildung des Verfahrens des Hauptpatents wurde gefunden, daß sich dieses Ziel - die Vermeidung eines weiteren Kontakts des Chloramine mit einual gebildetem organisch substi tuierten Hydra@in - auch vorteilhaft erreichen läßt, wenn die das primäre oder sekundäre Amin enthaltende flüssige Phase während des Einführens des Chloramins fein verteilt wird. Die feine Verteilung wird zweckmäßig durch Eindüsen der flüssigen Phase in den verengten Teil eines vorteilhaft senkrechtstehend angeordneten Venturi-Rohrs bewerkstelligt, welches der Chloramin (haltige)-Gasstrom von oben nach unten durchströmt. Ein Venturi-Rohr ist, wie in den einschlägigen Lehrbüchern und Lexika der Physik und der chemischen Verfahrenstechnik nachlesbar, ein ic verengendes und dann allmählich wieder erweiterndes Rohr. Ein durch das Rohr strötnendes gasförmiges oder flüssiges Medium wird durch die Verengung auf höhere Geschwindigkeit und niederen Druck, in dem sich erweiternden Rohrteil aber nahezu wieder zurück in den ursprünglichen Zustand gebracht. Wenn - wie im vorliegenden Fall - der Cbloramin(haltige)-Gasstrom mit der eingedüsten flüssigen Phase in dem verengten Rohrteil zusammentrifft, wird die flüssige Phase infolge der erhöhten Gasgeschwindigkeit in diesem Teil besonders intensiv bewegt und fein dispergiert, Wegen der in den Flüssigkeitströpfchen herrschenden starken Bewegung der Moleküle gegeneinander wird das einmal gebildete orges nische Hydrazin von der Tröpfchenoberfläche schnell ins Innere abtransportiert. Die Uydrazinverluste durch die Folgereaktionen von Hydrazin mit Chloramin erden erfindungsgemäß aber auch schon ohne die Bewegung in den Tröpfchen allein durch die Vcrgrößerung der Oberflache des flüssigen Amins herabgesetzt. Denn die Vergrößerung der Oberfläche führt zu ciner niedrigeren Hydrazinbelegungsdichte an der Oberfläche und damit zu eier Erhöhung der Wahrscheinlichkeit, daß das nächste Chloraminmolekül ein Aminmolekül und kein Hydrazinmolekül trifft und somit ein teres Hydrazin gebildet und nicht umgesetzt wird.In a further development of the process of the main patent, it was found that this goal - the avoidance of further contact of the chloramine with Once formed, organically substituted hydra @ in - can also be achieved advantageously lets when the liquid containing the primary or secondary amine Phase is finely divided during the introduction of the chloramine. The fine distribution is expediently advantageous by injecting the liquid phase into the narrowed part of a vertically arranged Venturi tube accomplished which the chloramine (containing) gas flow flows through from top to bottom. A venturi tube is like in the relevant textbooks and lexicons in physics and chemical process engineering readable, a pipe that narrows and then gradually expands again. A Gaseous or liquid medium flowing through the pipe is passed through the constriction to higher speed and lower pressure in the expanding pipe part but almost brought back to its original state. If - as in present case - the Cbloramin (containing) gas stream with the injected liquid Phase meets in the narrowed pipe part, the liquid phase is due the increased gas velocity in this part moves particularly intensely and finely dispersed, because of the strong movement in the liquid droplets of the molecules against each other, the organic hydrazine is once formed by the Droplet surface quickly transported into the interior. The uydrazine losses through the subsequent reactions of hydrazine with chloramine also ground according to the invention without the movement in the droplets solely through the enlargement of the surface of the liquid amine decreased. Because the enlargement of the surface leads to A lower hydrazine occupancy density on the surface and thus an increase the likelihood that the next chloramine molecule will be an amine molecule and not a Hydrazine molecule meets and thus a teres hydrazine is formed and not converted will.

Hinsichtlich der für das Verwahren in Frage kommende Chloramine, der primären und sekundären Amine, etwaiger Lösungsmittel, der Reaktionstemperatur, der Aufarbeitung ud weiterer Details des Verfahrens gilt das i Hauptpaterlt Gesagte.With regard to the chloramines in question for storage, the primary and secondary amines, any solvents, the reaction temperature, Regarding the processing and further details of the procedure, what has been said in the main patron applies.

Claims (1)

PATENTANSPRUCHPATENT CLAIM Weitere Aushildung des Verfahrens zur Herstellung organisch substituierter Hydrazine durch Einführen von unsubstituiertem oder durch eine oder zwei Alkylgruppen substituiertem Chloramin in eine flüssige, im wesentlichen wasserfreie Phase aus flüssigem oder in einem inerten Lösungsmittel gelöstem primären oder sekundären Amin, wobei die flüssige Phase während des Einführens des Chloramins intensiv bewegt wird, nach Patent Nr. .Further development of the process for the production of organically substituted Hydrazines by introducing unsubstituted or one or two alkyl groups substituted chloramine into a liquid, essentially anhydrous phase primary or secondary liquid or dissolved in an inert solvent Amine, the liquid phase moving intensively during the introduction of the chloramine is, according to patent no. (Patentanmeldung P 24 40 238.8), dadurch gekennzeichnet, daß d flüssige Phase während des Einführens des Chioramins fein verteilt wird.(Patent application P 24 40 238.8), characterized in that d is liquid Phase is finely divided during the introduction of the chioramin.
DE19752528733 1975-06-27 1975-06-27 Organically substd. hydrazine mfr. - involves finely dividing liq. phase when adding chloroamine Withdrawn DE2528733A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752528733 DE2528733A1 (en) 1975-06-27 1975-06-27 Organically substd. hydrazine mfr. - involves finely dividing liq. phase when adding chloroamine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752528733 DE2528733A1 (en) 1975-06-27 1975-06-27 Organically substd. hydrazine mfr. - involves finely dividing liq. phase when adding chloroamine

Publications (1)

Publication Number Publication Date
DE2528733A1 true DE2528733A1 (en) 1977-01-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752528733 Withdrawn DE2528733A1 (en) 1975-06-27 1975-06-27 Organically substd. hydrazine mfr. - involves finely dividing liq. phase when adding chloroamine

Country Status (1)

Country Link
DE (1) DE2528733A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248800A (en) * 1979-03-22 1981-02-03 Pennwalt Corporation Manufacture of organic hydrazines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248800A (en) * 1979-03-22 1981-02-03 Pennwalt Corporation Manufacture of organic hydrazines

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