DE729105C - Manufacture of hydrazine - Google Patents

Manufacture of hydrazine

Info

Publication number
DE729105C
DE729105C DER111409D DER0111409D DE729105C DE 729105 C DE729105 C DE 729105C DE R111409 D DER111409 D DE R111409D DE R0111409 D DER0111409 D DE R0111409D DE 729105 C DE729105 C DE 729105C
Authority
DE
Germany
Prior art keywords
hydrazine
solution
glue
sulfate
manufacture
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
Application number
DER111409D
Other languages
German (de)
Inventor
Dr-Ing Karl Thoennessen
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.)
Dr F Raschig GmbH
Original Assignee
Dr F Raschig GmbH
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 Dr F Raschig GmbH filed Critical Dr F Raschig GmbH
Priority to DER111409D priority Critical patent/DE729105C/en
Application granted granted Critical
Publication of DE729105C publication Critical patent/DE729105C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00Nitrogen; Compounds thereof
    • C01B21/082Compounds containing nitrogen and non-metals and optionally metals
    • C01B21/16Hydrazine; Salts thereof

Landscapes

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

Description

Herstellung von Hydrazin Nach einem bekannten Verfahren wird Hydrazin durch Einwirkung von Alka.Ehypochlorit ' auf Hainstoff in Gegenwart überschüssiger Alkalilauge «,erzeugt. Die Ausheuten. sind bei diesem Verfahren dann besonders günstig, wenn nach einem bekannten Vorschlag die Umsetzung in von kolloiden Stoffen, wie Leim, Gelatine bzw. deren Spaltungsprodukten, vorgenommen wird.Production of hydrazine According to a known process, hydrazine is made by the action of Alka.Ehypochlorit 'on Hainstoff in the presence of excess Alkali «, generated. The present. are particularly favorable with this method, if, according to a known proposal, the implementation in of colloidal substances, such as Glue, gelatin or their cleavage products is made.

Die Verwendung von Leim bei dem in Frage stehenden Verfahren bringt aber verschiedene Nachteile mit sich. So wird vor allem durch die Gegenwart von Leim die Abscheidung des Hydrazins aus der Lösung sowohl als Hydrazinsulfat oder als Hydrazinhydrat erschwert. Der Lenin oder dessen Zersetzungsprodukte haften bei der Aufarbeitung der Reaktionslösung besonders hartnäckig den Endprodukten an, so daß die Herstellung reiner Stoffe, wie Hydrazinsulfat oder Hydrazinhydrat, umständlich und teuer ist. Auch beim Eindampfen der verfahrensgemäß erzeugten verdünnten Hydrazinlösung verursacht die Gegenwart von Leim bzw. dessen Zersetzungsprodukten lästiges Schäumen der Lösung. Schließlich wurde auch gefunden, daß besonders bei längerem Stehen der Reaktionslösung ein TeiL-des gebildeten Hydrazins durch Leim bzw.dessen Zersetzungsprodul--te wieder zersetzt wird, ivo@-durch die Ausbeute nachträglich noch schlechter wird.The use of glue in the process in question brings about but with various disadvantages. So is especially the presence of Glue the deposition of the hydrazine from the solution as either hydrazine sulfate or more difficult than hydrazine hydrate. The Lenin or its decomposition products are attached the work-up of the reaction solution particularly persistently to the end products, so that the production of pure substances, such as hydrazine sulfate or hydrazine hydrate, is cumbersome and is expensive. Also when evaporating the dilute hydrazine solution produced according to the method the presence of glue or its decomposition products causes annoying foaming the solution. Finally, it was also found that the Reaction solution a part of the hydrazine formed by glue or its decomposition products is decomposed again, ivo @ -through the yield subsequently becomes even worse.

Es wurde überraschenderweise gefunden, daß die Herstellung von Hydrazin aus Alkalihypochlorit, Harnstoff und Alkalilauge mit guter Ausbeute gelingt, wenn man die Reaktion in Gegenwart von Manganverbindumgen durchführt. Es ist hierbei gleichgültig, ob man das Mangan. in Form von Kaliumpermanganat oder Mangansulfat oder ManganchloTür zusetzt. Die bei -der Verwendung von Leim als Katalysator auftretendem. Nachbeile zeigen sich bei Zusatz von Manganverbindungen nicht.It has surprisingly been found that the production of hydrazine from alkali hypochlorite, urea and alkali lye succeeds in good yield if the reaction is carried out in the presence of manganese compounds. It is here no matter whether you get the manganese. in the form of potassium permanganate or manganese sulfate or Manganchlo door clogs. The when using glue as Catalyst occurring. There are disadvantages with the addition of manganese compounds not.

Beispiel . Zu einer Lösung von 74,5 g Natriumhypochlorit in rooo ccm Wasser werden zunächst 28og NaOH q.5° B6 gegeben. Dann wird das Gemisch mit 15 ccm einer 1/2 %igen Mangansulfatlösung versetzt. Nach Kühlung auf ehva 15' %i,ierden 6o g Harnstoff zugesetzt. Hierauf wird zum Kochen erhitzt und ,die Lösung etwa 5 Minuten lang bei dieser Temperatur gehalten. Aus der Reaktionslösung kann man das Hydrazin in bekannter Weise, als Sulfat oder als Hydrat gewinnen. Die Ausbeute beträgt 78 bis 9o g Hydrazinsulfat= 6o bis 70% der Theorie.Example . To a solution of 74.5 g of sodium hypochlorite in 100 cc of water, 28 g of NaOH q.5 ° B6 are first added. Then the mixture is mixed with 1 5 cc of a 1/2% manganese sulfate solution. After cooling to approximately 15 %, 60 g of urea are added. It is then heated to the boil and the solution is kept at this temperature for about 5 minutes. The hydrazine can be obtained from the reaction solution in a known manner, as a sulfate or as a hydrate. The yield is 78 to 90 g of hydrazine sulfate = 60 to 70% of theory.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Hydrazin durch Oxydation von Harnstoff mit Alkalihypochlorit in Gegenwart von Alkalilauge, dadurch gekennzeichnet, daß gleichzeitig in Gegenwart von Manganverbindungen gearbeitet wird.PATENT CLAIM: Process for the production of hydrazine by oxidation of urea with alkali hypochlorite in the presence of alkali, characterized in that it is carried out at the same time in the presence of manganese compounds.
DER111409D 1941-10-31 1941-10-31 Manufacture of hydrazine Expired DE729105C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER111409D DE729105C (en) 1941-10-31 1941-10-31 Manufacture of hydrazine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER111409D DE729105C (en) 1941-10-31 1941-10-31 Manufacture of hydrazine

Publications (1)

Publication Number Publication Date
DE729105C true DE729105C (en) 1942-12-10

Family

ID=7421918

Family Applications (1)

Application Number Title Priority Date Filing Date
DER111409D Expired DE729105C (en) 1941-10-31 1941-10-31 Manufacture of hydrazine

Country Status (1)

Country Link
DE (1) DE729105C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917545A (en) * 1957-09-23 1959-12-15 Nat Distillers Chem Corp Preparation of n-substituted hydrazine derivatives
US3227753A (en) * 1962-02-19 1966-01-04 Wallace & Tiernan Inc Manufacture of biurea

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2917545A (en) * 1957-09-23 1959-12-15 Nat Distillers Chem Corp Preparation of n-substituted hydrazine derivatives
US3227753A (en) * 1962-02-19 1966-01-04 Wallace & Tiernan Inc Manufacture of biurea

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