CH191848A - Process for the production of a new intermediate product. - Google Patents

Process for the production of a new intermediate product.

Info

Publication number
CH191848A
CH191848A CH191848DA CH191848A CH 191848 A CH191848 A CH 191848A CH 191848D A CH191848D A CH 191848DA CH 191848 A CH191848 A CH 191848A
Authority
CH
Switzerland
Prior art keywords
new intermediate
production
intermediate product
acid
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 CH191848A publication Critical patent/CH191848A/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-     Aminobenzol    -     3-          hydrazinosulfonsäure    -. erhält, wenn man  die     1-Nitrobenzol    - 3     -hydrazinosulfonsäure,     unter Vermeidung der     Anwendung    von     ver-          seifend    wirkenden Mitteln, mit Reduktions  mitteln behandelt.  



  Das neue Zwischenprodukt bildet eine  leicht lösliche Masse, die die Reaktion des  freien Hydrazins nicht zeigt. Es kann aber  durch Behandeln mit     Verseifungsmitteln    in  das freie     Hydrazin        übergeführt        werden.    Es  ist ein wertvolles Zwischenprodukt zur Her  stellung von Farbstoffen.  



  <I>Beispiel:</I>  23,3 Teile     Nitrobenzol-3-hydrazinosulfon-          säure    der Formel  
EMI0001.0016     
    werden als     Natriumsalz    in Wasser gelöst.  Die Lösung wird wie üblich mit Eisenfeile  und Essigsäure reduziert. Die Reduktions  brühe wird mit Soda alkalisch gemacht und       genutscht.     



  Die Lösung, die das     Natriumsalz    der       1-Aminobenzol-3-hydrazinosulfonsäure    der  Formel  
EMI0001.0021     
    enthält,     wird    im Vakuum zur Trockne ein  gedampft.



  Process for the production of a new intermediate product. It has been found that a new intermediate product - 1-aminobenzene - 3-hydrazinosulfonic acid -. obtained when 1-nitrobenzene - 3-hydrazinosulfonic acid is treated with reducing agents while avoiding the use of saponifying agents.



  The new intermediate forms a readily soluble mass that does not show the reaction of the free hydrazine. However, it can be converted into free hydrazine by treatment with saponifying agents. It is a valuable intermediate in the manufacture of dyes.



  <I> Example: </I> 23.3 parts of nitrobenzene-3-hydrazinosulfonic acid of the formula
EMI0001.0016
    are dissolved in water as the sodium salt. The solution is reduced as usual with an iron file and acetic acid. The reduction broth is made alkaline with soda and sucked.



  The solution containing the sodium salt of 1-aminobenzene-3-hydrazinosulfonic acid of the formula
EMI0001.0021
    contains, is evaporated to dryness in a vacuum.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Zwischenproduktes - die 1-Aminobenzol-3- hydrazinosulfonsäure - dadurch gekenn zeichnet, dass man die 1-Nitrohenzol-3-hydra- zinosulfonsäure, unter Vermeidung der An wendung von verseifend wirkenden Mitteln, mit Reduktionsmitteln behandelt. Das neue Zwischenprodukt bildet eine leicht lösliche Hasse, die die Reaktion des freien Hydrazins nicht zeigt. PATENT CLAIM: Process for the production of a new intermediate product - 1-aminobenzene-3-hydrazinosulfonic acid - characterized in that 1-nitrohenzene-3-hydrazinosulfonic acid is treated with reducing agents while avoiding the use of saponifying agents. The new intermediate forms a readily soluble hasse that does not show the reaction of the free hydrazine. Es kann aber durch Behandeln mit Verseifungsmitteln in das freie Hydrazin übergeführt werden. Es ist ein wertvolles Zwischenprodukt zur Her stellung von Farbstoffen. However, it can be converted into free hydrazine by treatment with saponifying agents. It is a valuable intermediate in the manufacture of dyes.
CH191848D 1937-08-14 1936-04-09 Process for the production of a new intermediate product. CH191848A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH191848T 1937-08-14

Publications (1)

Publication Number Publication Date
CH191848A true CH191848A (en) 1937-07-15

Family

ID=4437876

Family Applications (1)

Application Number Title Priority Date Filing Date
CH191848D CH191848A (en) 1937-08-14 1936-04-09 Process for the production of a new intermediate product.

Country Status (1)

Country Link
CH (1) CH191848A (en)

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