CH194651A - Process for the production of a new intermediate product. - Google Patents

Process for the production of a new intermediate product.

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Publication number
CH194651A
CH194651A CH194651DA CH194651A CH 194651 A CH194651 A CH 194651A CH 194651D A CH194651D A CH 194651DA CH 194651 A CH194651 A CH 194651A
Authority
CH
Switzerland
Prior art keywords
intermediate product
new intermediate
acid
production
hydrazinosulfonic
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH194651A publication Critical patent/CH194651A/en

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

Description

  

  Verfahren zur Herstellung eines neuen Zwischenproduktes.    Es wurde gefunden,     dass    man ein neues       Zwischenprodukt    - die     1-A.minobenzol-4-          hydrazinosulfonsäure    - erhält,     wenn    man  die     1-Nitrobenzol-4-hydrazinosulfonsäure,    un  ter Vermeidung der Anwendung von     ver-          seifend    wirkenden     Mitteln,    mit Reduktions  mitteln behandelt.  



  Das neue     Zwischenprodukt    bildet     als        Na-          triumsa.lz    eine     leicht    lösliche Masse, die die  Reaktion     des        freien    Hydrazins nicht zeigt.  Es kann aber durch Behandeln mit     Ver-          seifungsmitteln        in    das freie     Hydrazin    über  geführt werden. Es ist ein wertvolles     Zwi-          sohenprodukt    zur     Herstellung    von Farb  stoffen.  



  <I>Beispiel:</I>       23,.3    Teile     Nitrobenzol-4-hydrazinosulfon-          säure    der Formel  
EMI0001.0027     
    herrührend von einer mit     schwefliger    Säure  reduzierten     4-Nitro-l-diazobenzollösung,    wer-    den nach Entfernung der überschüssigen       sohwefligen    Säure, wie     üblich    mit     Eisenfeile     und Essigsäure reduziert. Die     Reduktions-          brühe    wird mit     @Sola    alkalisch gemacht     und          genutscht.     



  Die     Lösung,    die das     Natriumsalz    der  1 -     Aminobenzol    - 4 -     hydrazinsulfosäure    der       Formel     
EMI0001.0043     
    enthält, wird vorsichtig mit Säure versetzt,  wobei die neue Säure als weisser Niederschlag  ausfällt.



  Process for the production of a new intermediate product. It has been found that a new intermediate - 1-A.minobenzene-4-hydrazinosulfonic acid - is obtained if 1-nitrobenzene-4-hydrazinosulfonic acid is treated with reducing agents, avoiding the use of saponifying agents .



  As a sodium salt, the new intermediate forms an easily soluble mass which does not show the reaction of the free hydrazine. However, it can be converted into the free hydrazine by treatment with saponifying agents. It is a valuable intermediate product in the manufacture of dyes.



  <I> Example: </I> 23.3 parts of nitrobenzene-4-hydrazinosulfonic acid of the formula
EMI0001.0027
    originating from a 4-nitro-1-diazobenzene solution reduced with sulphurous acid, after removal of the excess sulphurous acid it is reduced as usual with iron files and acetic acid. The reduction broth is made alkaline with @Sola and sucked.



  The solution containing the sodium salt of 1 - aminobenzene - 4 - hydrazinesulfonic acid of the formula
EMI0001.0043
    contains, acid is added carefully, the new acid precipitating out as a white precipitate.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Zwischenproduktes - -der 1-Aminobenzol-4- hydrazinosulfonsäure -, dadurch gekenn zeichnet, Uass man die 1-Nitrobenzol-4-hydra- zinosulfon,säure, unter Vermeidung der An wendung von verseifend wirkenden Mitteln, mit Reduktionsmitteln behandelt. PATENT CLAIM: Process for the production of a new intermediate product - the 1-aminobenzene-4-hydrazinosulfonic acid - characterized by the fact that 1-nitrobenzene-4-hydrazinosulfonic acid is used while avoiding the use of saponifying agents Treated reducing agents. Das neue Zwischenprodukt bildet als Na triumsalz eine leicht lösliche Masse, die die Reaktion des freien Hydrazins nicht zeigt. Es kann aber durch Behandeln zeit Vensei- fungsmitteln in das freie Hydrazin über- geführt werden. Es ist ein wertvolles Zwi schenprodukt zur Herstellung von Farb stoffen. As a sodium salt, the new intermediate forms an easily soluble mass that does not show the reaction of the free hydrazine. It can, however, be converted into the free hydrazine by treatment with saponifying agents. It is a valuable intermediate product in the manufacture of dyes.
CH194651D 1936-04-09 1936-04-09 Process for the production of a new intermediate product. CH194651A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH194651T 1936-04-09
CH191848T 1937-08-14

Publications (1)

Publication Number Publication Date
CH194651A true CH194651A (en) 1937-12-15

Family

ID=25722179

Family Applications (1)

Application Number Title Priority Date Filing Date
CH194651D CH194651A (en) 1936-04-09 1936-04-09 Process for the production of a new intermediate product.

Country Status (1)

Country Link
CH (1) CH194651A (en)

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