BE443080A - - Google Patents

Info

Publication number
BE443080A
BE443080A BE443080DA BE443080A BE 443080 A BE443080 A BE 443080A BE 443080D A BE443080D A BE 443080DA BE 443080 A BE443080 A BE 443080A
Authority
BE
Belgium
Prior art keywords
emi
ammonia
solution
saturation
hydrazine
Prior art date
Application number
Other languages
French (fr)
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.)
Publication of BE443080A publication Critical patent/BE443080A/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
    • C01B21/16—Hydrazine; Salts thereof

Landscapes

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

Description

       

  procédé de préparation de l'hydrazine.

  
Il appartient au domaine connu de préparer l'hydre-

  
 <EMI ID=1.1> 

  
qu'indique la théorie. 

  
 <EMI ID=2.1> 

  
d'ammoniac, lorsqu'on sature complètement cas solutions, aga lement à ces basses températures, d'ammoniac anhydre ou contenant peu d'eau et lorsqu'on abandonne la solution, obtenue

  
 <EMI ID=3.1> 

  
d'azote libre.

  
La solution diluée d'hypochlorite renferme de prefe rence moins de 100 g. de chlore actif au litre, candis que la solution initiale d'ammoniac ne doit pas contenir plus de 15 :
d'ammoniac. Au cours du premier stade, on emploie de préferen la solution d'ammoniac en un excès relativement petit, par exemple en un excès allant du double à l'octuple. Il est part:
culièrement avantageux d'effectuer la saturation à l'aide d'au moniac liquide et de mélanger de telles quantités de solution et d'ammoniac liquide que la basse température nécessaire ne

  
 <EMI ID=4.1> 

  
dans ces conditions, une partie de l'ammoniac passe à l'état de gaz qu'on peut liquéfier de nouveau et faire rentrer dans la réaction. Le temps nécessaire pour les réactions après

  
 <EMI ID=5.1> 

  
quelques minutes, le temps nécessaire aéra de plusieurs heures tandis que, lorsque la saturation est très lente, ces réaction*

  
 <EMI ID=6.1>  

  
 <EMI ID=7.1> 

  
qu'on a chasse et on le reemploie pour la saturation. Dans certaines circonstances, il peut y avoir avantage à chasser l'ammoniac soue une certaine pression pour faciliter ainsi 

  
 <EMI ID=8.1> 

  
 <EMI ID=9.1> 

  
lution faiblement alcaline d'hypochlorite de sodium contenais
70 g. de chlore actif au litre, les deux solutions ayant une

  
 <EMI ID=10.1> 

  
deuxième réservoir de passage dans lequel on introduit en mime temps 44 parties en volume par heure d'ammoniac liquide

  
 <EMI ID=11.1> 

  
moniac. La solution qui s'est produite est abandonnée au repos

  
 <EMI ID=12.1> 

  
qu'ensuite qu'on la soumet au traitement subséquent connu. Le rendement en hydrazine s'élève à 90 % environ oalouléa sur l'hypochlorite entré en réaotion et à 95 % environ calculée

  
 <EMI ID=13.1>  

  
 <EMI ID=14.1> 

  
du mélange produit par la réaction, l'abandon au repos de 1. solution saturée, jusqu'à ce que la formation de l'hydrazin soit à peu près achevée ou jusqu'à oe qu'il se soit formé des combinaisons intermédiaires, qui, lorsqu'on chauffe la 

  
 <EMI ID=15.1> 



  process for preparing hydrazine.

  
It is in the known field to prepare hydra-

  
 <EMI ID = 1.1>

  
that the theory indicates.

  
 <EMI ID = 2.1>

  
ammonia, when the solutions are completely saturated, at these low temperatures, with anhydrous ammonia or ammonia containing little water and when the solution is abandoned, obtained

  
 <EMI ID = 3.1>

  
of free nitrogen.

  
The dilute hypochlorite solution preferably contains less than 100 g. of active chlorine per liter, but the initial ammonia solution must not contain more than 15:
ammonia. In the first stage, the ammonia solution is preferably employed in a relatively small excess, for example in a double to eight-fold excess. He is part:
It is particularly advantageous to carry out saturation with liquid ammonia and to mix such quantities of solution and liquid ammonia that the necessary low temperature does not

  
 <EMI ID = 4.1>

  
under these conditions, part of the ammonia passes into the state of a gas which can be liquefied again and made to reenter the reaction. The time required for reactions after

  
 <EMI ID = 5.1>

  
a few minutes, the necessary time aeration of several hours while, when the saturation is very slow, these reactions *

  
 <EMI ID = 6.1>

  
 <EMI ID = 7.1>

  
that we have hunted and we re-use it for saturation. Under certain circumstances, it may be advantageous to drive off the ammonia under some pressure to thereby facilitate

  
 <EMI ID = 8.1>

  
 <EMI ID = 9.1>

  
Weakly alkaline solution of sodium hypochlorite contained
70 g. of active chlorine per liter, the two solutions having a

  
 <EMI ID = 10.1>

  
second passage tank into which 44 parts by volume per hour of liquid ammonia are introduced at the same time

  
 <EMI ID = 11.1>

  
moniac. The solution that has occurred is abandoned at rest

  
 <EMI ID = 12.1>

  
only after that it is subjected to the known subsequent processing. The hydrazine yield amounts to approximately 90% oaloulea on the hypochlorite which has undergone reaction and to approximately 95% calculated

  
 <EMI ID = 13.1>

  
 <EMI ID = 14.1>

  
of the mixture produced by the reaction, leaving to stand 1 saturated solution, until the formation of hydrazine is nearly complete or until intermediate combinations have formed, which , when heating the

  
 <EMI ID = 15.1>


    

Claims (1)

<EMI ID=16.1> <EMI ID = 16.1> en ce qu'au second stade du procède, la saturation a lieu au in that at the second stage of the process, saturation takes place at moyen d'ammoniac liquide. medium liquid ammonia.
BE443080D 1938-12-03 BE443080A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE229181X 1938-12-03

Publications (1)

Publication Number Publication Date
BE443080A true BE443080A (en)

Family

ID=5867631

Family Applications (1)

Application Number Title Priority Date Filing Date
BE443080D BE443080A (en) 1938-12-03

Country Status (3)

Country Link
BE (1) BE443080A (en)
CH (1) CH229181A (en)
FR (1) FR876000A (en)

Also Published As

Publication number Publication date
CH229181A (en) 1943-10-15
FR876000A (en) 1942-10-09

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