CH149613A - Process for the preparation of a nitrogenous vat dye. - Google Patents

Process for the preparation of a nitrogenous vat dye.

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Publication number
CH149613A
CH149613A CH149613DA CH149613A CH 149613 A CH149613 A CH 149613A CH 149613D A CH149613D A CH 149613DA CH 149613 A CH149613 A CH 149613A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
vat dye
nitrogenous
nitrogen
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH149613A publication Critical patent/CH149613A/en

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Description

  

  Verfahren zur Darstellung eines     stickstoffhaltigen        H.üpenfarbstoffes.       Im Hauptpatent ist ein Verfahren zur  Darstellung eines stickstoffhaltigen     Küpen-          farbstoffes    angegeben, bei dem in der     Bzl-          Stellung    negativ substituiertes 2 .     N-Pyrazol-          anthronylbenzanthron    mit-einem alkalischen  Kondensationsmittel behandelt wird.  



  Es wurde nun gefunden, dass man eben  falls einen neuen, wertvollen,     stickstoffhaltigen          Küpenfarbstoff    mit ähnlichen Eigenschaften  erhält, wenn man in der     Bzl-Stellung    nega  tiv substituiertes 2.     N-Pyrazolarrthr-onyl-6-          chlorbenzanthron    (erhalten zum Beispiel durch  Kondensation von     Pyrazolanthron    mit einem  in der     Bzl-Stellung    negativ substituierten 2  Halogen-6-chlorbenzanthron) mit einem alka  lischen Kondensationsmittel behandelt. Hier  bei wird der in     Bzl-Stellung    befindliche ne  gative     Substituent    abgespalten.  



  Der erhaltene     Farbstoff    löst sich in kon  zentrierter Schwefelsäure mit grüner Farbe    und färbt Baumwolle aus violetter     Küpe    in  violetten Tönen.  



  <I>Beispiel:</I>  20 Teile 2 .     N-Py        -azolarrthronyl-6    .     Bzl-di-          chlorbenzanthrorr,    erhalten zum Beispiel durch  Kondensation von     Pyrazolanthron    mit     2.6-          Bzl-Trichlorbenzanthron    (hellbraune     Blättehen     aus Nitrobenzol), werden in eine 1400 C  heisse Mischung von 200 Teilen     Ätzkali    und  200 Teilen     Äthylalkohol    eingetragen.     AIan     rührt solange, bis die     Farbstoffbildung    be  endet ist.

   Der Farbstoff wird durch Eingiessen  der Schmelze in Wasser und Einleiten von  Luft in die alkalische Flüssigkeit aufge  arbeitet.



  Process for the preparation of a nitrogen-containing H.üpen dye. The main patent specifies a process for the preparation of a nitrogen-containing vat dye in which the negatively substituted 2. N-pyrazole anthronylbenzanthrone is treated with an alkaline condensation agent.



  It has now been found that a new, valuable, nitrogen-containing vat dye with similar properties is also obtained if the second N-pyrazolarrthr-onyl-6-chlorobenzanthrone (obtained, for example, by condensation of pyrazolanthrone) is negatively substituted in the Bzl position treated with a negatively substituted 2 halo-6-chlorobenzanthrone in the Bzl position) with an alkaline condensation agent. In this case, the negative substituent in the Bzl position is split off.



  The dye obtained dissolves in concentrated sulfuric acid with a green color and dyes cotton from a purple vat in purple tones.



  <I> Example: </I> 20 parts 2. N-Py -azolarrthronyl-6. Bzl-dichlorobenzanthrone, obtained for example by condensation of pyrazolanthrone with 2.6-Bzl-trichlorobenzanthrone (light brown leaves from nitrobenzene), are introduced into a 1400 C mixture of 200 parts of caustic potash and 200 parts of ethyl alcohol. Alan stirs until the dye formation has ended.

   The dye is worked up by pouring the melt into water and passing air into the alkaline liquid.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines stickstoff haltigen Küpenfarbstoffes, dadurch gekenn- zeichnet, dass man in der tzl-Stellung nega tiv substituiertes 2..N-Pyrazolanthronyl-6- chlorbenzanthron mit einem alkalischen Kon densationsmittel behandelt. Der erhaltene Farbstoff löst sich in kon zentrierter Schwefelsäure mit grüner Farbe und färbt Baumwolle aus violetter güpe in violetten Tönen. PATENT CLAIM: Process for the preparation of a nitrogen-containing vat dye, characterized in that 2..N-pyrazolanthronyl-6-chlorobenzanthrone which is negatively substituted in the tzl position is treated with an alkaline condensation agent. The dye obtained dissolves in concentrated sulfuric acid with a green color and dyes cotton of a violet type in violet tones.
CH149613D 1928-11-13 1929-09-28 Process for the preparation of a nitrogenous vat dye. CH149613A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE149613X 1928-11-13
CH144868T 1929-09-28

Publications (1)

Publication Number Publication Date
CH149613A true CH149613A (en) 1931-09-15

Family

ID=25714554

Family Applications (1)

Application Number Title Priority Date Filing Date
CH149613D CH149613A (en) 1928-11-13 1929-09-28 Process for the preparation of a nitrogenous vat dye.

Country Status (1)

Country Link
CH (1) CH149613A (en)

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