BE640895A - - Google Patents

Info

Publication number
BE640895A
BE640895A BE640895DA BE640895A BE 640895 A BE640895 A BE 640895A BE 640895D A BE640895D A BE 640895DA BE 640895 A BE640895 A BE 640895A
Authority
BE
Belgium
Prior art keywords
emi
trihydrate
minutes
temperature
thicker
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 BE640895A publication Critical patent/BE640895A/fr

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B15/00Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
    • C01B15/055Peroxyhydrates; Peroxyacids or salts thereof
    • C01B15/12Peroxyhydrates; Peroxyacids or salts thereof containing boron
    • C01B15/126Dehydration of solid hydrated peroxyborates to less hydrated or anhydrous products

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)

Description

       

   <EMI ID=1.1> 

  
 <EMI ID=2.1> 

  
soit pas nécessairement une représentation absolument exacte 

  
do leur structure,

  
 <EMI ID=3.1> 

  
usages. Le monohydr&#65533;te possède une teneur élevée en oxygène

  
 <EMI ID=4.1>   <EMI ID=5.1> 

  
liquéfier.

  
Le troisième hydrate, le trihydrate, possède

  
 <EMI ID=6.1> 

  
ment, le trihydrate est pour beaucoup d'applications l'hydrate préféré des trois.

  
Suivant la présente invention on apporte un

  
 <EMI ID=7.1> 

  
de mélanges de celui-ci avec du perborate de sodium tétrahydra.

  
 <EMI ID=8.1> 

  
 <EMI ID=9.1> 

  
de plus en plus épaisse à mesure que le trihydrate se forme, et en vue matière sèche lorsque l'eau est élimina au court 

  
 <EMI ID=10.1> 

  
s'effectue constamment en phase solide. 

  
Il est avantageux d'effectuer le procédé à 

  
 <EMI ID=11.1> 

  
On trouve fréquemment dans les procédés confor.  mes à l'invention que la formation du trihydrate est pratique,..

  
 <EMI ID=12.1> 

  
compte du séchage, la conversion tout entière peut souvent être terminée en un tumps ne dépassant pus 90 minutes. Comme on la verra par les exemples donnés plus loin, la conversion complète peut être terminée en 40 minutes ou moins. De préfé-

  
 <EMI ID=13.1> 

  
être humide, mais, si alla doit être humidifiée, il no peut alors y avoir plus d'euu présente que ce qu'il faut pour humecter

  
 <EMI ID=14.1> 

  
 <EMI ID=15.1> 

  
Une matière convenable de conduite du procède conforme à l'invention est de mettre en contât les réactifs 

  
 <EMI ID=16.1> 

  
cédé doit être conduit de manière à obtenir une dation rapide  à la température désirée (par exemple en un tempe de chauffage  de 3 à 5 minutes). cette température doit alors être maintenue  pendant 5 à 35 minutes pour la réaction, puis vient un refroi- 

  
 <EMI ID=17.1> 

  
provenir de n'importe quelle source appropriée, mais elle est de préférence obtenue par un procédé conforme à la prisant*

  
 <EMI ID=18.1> 

  
 <EMI ID=19.1> 

  
Un procédé qui est conforme à l'invention présente les avantages précieux d'être rapide et d'être complet.

  
 <EMI ID=20.1> 

  
riques normales étant parfaitement satisfaisantes. Le procédé présente en outre l'avantage surprenant qu'en dépit des tumpé-

  
 <EMI ID=21.1> 

  
Des charges de 10 g de perborate de sodium

  
 <EMI ID=22.1> 

  
chauffées dano de petits tubes de verre (ouverts à l'atmosphère)

  
. 

  
 <EMI ID=23.1> 

  
 <EMI ID=24.1> 

  
aux fuyons X sous la forma de poudre) t 

  

 <EMI ID=25.1> 


  
 <EMI ID=26.1> 

  
et 1,362 kg de trihydrute sont chauffés dans un mélangeur  ouvert à lamas en forme de Z pendant 90 minutes à une tempe- 

  
 <EMI ID=27.1> 

  
Les rendements suivants sont obtenus après les  temps indiqués un minutes 
 <EMI ID=28.1> 
  <EMI ID=29.1> 

  
 <EMI ID=30.1> 

  
en trihydrate à diverses températures sont donnas ci-dessous 

  

 <EMI ID=31.1> 


  
 <EMI ID=32.1> 



   <EMI ID = 1.1>

  
 <EMI ID = 2.1>

  
is not necessarily an absolutely exact representation

  
of their structure,

  
 <EMI ID = 3.1>

  
uses. Monohydrate has a high oxygen content

  
 <EMI ID = 4.1> <EMI ID = 5.1>

  
liquefy.

  
The third hydrate, the trihydrate, has

  
 <EMI ID = 6.1>

  
The trihydrate is for many applications the preferred hydrate of the three.

  
According to the present invention, a

  
 <EMI ID = 7.1>

  
mixtures thereof with sodium perborate tetrahydra.

  
 <EMI ID = 8.1>

  
 <EMI ID = 9.1>

  
thicker and thicker as the trihydrate is formed, and in dry matter view when the water is removed in the short

  
 <EMI ID = 10.1>

  
is carried out constantly in the solid phase.

  
It is advantageous to carry out the process

  
 <EMI ID = 11.1>

  
Frequently found in conformal processes. to the invention that the formation of the trihydrate is practical, ..

  
 <EMI ID = 12.1>

  
After drying, the entire conversion can often be completed in no more than 90 minutes. As will be seen from the examples given later, the complete conversion can be completed in 40 minutes or less. Preferably

  
 <EMI ID = 13.1>

  
be damp, but, if alla needs to be moistened, then there may not be more water present than is required to moisten

  
 <EMI ID = 14.1>

  
 <EMI ID = 15.1>

  
A suitable material for carrying out the process according to the invention is to put the reagents in contast.

  
 <EMI ID = 16.1>

  
This should be done in such a way as to obtain rapid dation at the desired temperature (for example in a heating time of 3 to 5 minutes). this temperature must then be maintained for 5 to 35 minutes for the reaction, followed by cooling.

  
 <EMI ID = 17.1>

  
come from any suitable source, but is preferably obtained by a process according to the specification *

  
 <EMI ID = 18.1>

  
 <EMI ID = 19.1>

  
A method which is in accordance with the invention has the valuable advantages of being rapid and of being complete.

  
 <EMI ID = 20.1>

  
normal risks being perfectly satisfactory. The process also has the surprising advantage that despite the tumpé

  
 <EMI ID = 21.1>

  
Loads of 10 g of sodium perborate

  
 <EMI ID = 22.1>

  
heated in small glass tubes (open to the atmosphere)

  
.

  
 <EMI ID = 23.1>

  
 <EMI ID = 24.1>

  
to leaks X in the form of powder) t

  

 <EMI ID = 25.1>


  
 <EMI ID = 26.1>

  
and 1.362 kg of trihydrute are heated in an open Z-shaped lamas mixer for 90 minutes at a temperature.

  
 <EMI ID = 27.1>

  
The following yields are obtained after the times indicated one minute
 <EMI ID = 28.1>
  <EMI ID = 29.1>

  
 <EMI ID = 30.1>

  
as trihydrate at various temperatures are given below

  

 <EMI ID = 31.1>


  
 <EMI ID = 32.1>


    

Claims (1)

<EMI ID=33.1> <EMI ID=34.1> <EMI ID = 33.1> <EMI ID = 34.1> <EMI ID=35.1> <EMI ID = 35.1> <EMI ID=36.1> <EMI ID = 36.1> <EMI ID=37.1> <EMI ID = 37.1>
BE640895D 1963-12-05 BE640895A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR956120A FR1376295A (en) 1963-12-05 1963-12-05 Sodium perborate trihydrate, and mixtures thereof with the tetrahydrate

Publications (1)

Publication Number Publication Date
BE640895A true BE640895A (en)

Family

ID=8818157

Family Applications (1)

Application Number Title Priority Date Filing Date
BE640895D BE640895A (en) 1963-12-05

Country Status (2)

Country Link
BE (1) BE640895A (en)
FR (1) FR1376295A (en)

Also Published As

Publication number Publication date
FR1376295A (en) 1964-10-23

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