CH147045A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

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Publication number
CH147045A
CH147045A CH147045DA CH147045A CH 147045 A CH147045 A CH 147045A CH 147045D A CH147045D A CH 147045DA CH 147045 A CH147045 A CH 147045A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
vat
blue
vat dye
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 CH147045A publication Critical patent/CH147045A/en

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

Description

  

  Verfahren zur Darstellung eines     Küpenfarbstoffes.       Im Hauptpatent ist ein Verfahren zur  Darstellung eines neuen     Küpenfarbstoffes    be  schrieben, wonach man     Pyrazolanthron    mit       1-Amino-2-halogenanthrachinorien    in Gegen  wart von alkalischen Kondensationsmitteln  in der Wärme behandelt.  



  Es wurde nun gefunden, dass man einen  ähnlich wertvollen     Küpenfarbstoff    erhalten  kann, wenn man ein     2-Stellung    durch Ha  logen substituiertes     Pyrazolanthron    mit     1.4-          Diaminoanthrachinon    in Gegenwart eines al  kalischen Kondensationsmittels in der Wärme  behandelt.  



  Der erhaltene     Farbstoff    färbt Baumwolle  aus blauer     Küpe    in blauen Tönen, die an  der Luft in ein     grünstichiges        ("Trau    übergehen  und löst sich in     konzentierter    Schwefelsäure  mit blauer Farbe.  



  <I>Beispiel:</I>  Man erhitzt 18 Teile     2-Brompyrazol-          anthron,    29 Teile     1.4-Diamiiioanthrachinon,       10,3 Teile Pottasche, 1,2 Teile Kupferpulver  und 180 Teile Nitrobenzol so lange zum  Sieden, bis die     Farbstoffbildung    beendet ist.  Hierauf lässt man erkalten und trennt den  zum grössten Teil bereits ausgeschiedenen       Farbstoff    in bekannter Weise vom Lösungs  mittel ab. Man kann zum     Beispiel    zunächst  zum Abtrennen von Nitrobenzol mit Alkohol  verdünnen, absaugen und mit Alkohol und  Wasser waschen.

   Zur Abtrennung vom über  schüssigen     1.4-Diaminoanthrachinon    kann  man den rohen     Farbstoff    zum Beispiel mit  1000 Teilen Schwefelsäure von 70      /o        H2        SO."-          Gehalt    ausziehen. Um den     Farbstoff    in reine  Form zu bringen, kristallisiert man ihn  zweckmässig aus kochendem     Trichlorbenzol     um.



  Process for the preparation of a vat dye. In the main patent, a process for the preparation of a new vat dye is described, after which pyrazole anthrone is treated with 1-amino-2-halogenanthraquinories in the presence of alkaline condensing agents in the heat.



  It has now been found that a similarly valuable vat dye can be obtained if a 2-position halogen-substituted pyrazolanthrone is treated with 1,4-diaminoanthraquinone in the presence of an alkaline condensing agent under heat.



  The dye obtained dyes cotton from a blue vat in blue tones, which in the air change to a greenish trau and dissolves in concentrated sulfuric acid with a blue color.



  <I> Example: </I> 18 parts of 2-bromopyrazole anthrone, 29 parts of 1,4-diamioanthraquinone, 10.3 parts of potash, 1.2 parts of copper powder and 180 parts of nitrobenzene are heated to the boil until the dye formation has ended . It is then allowed to cool and the dye, which has for the most part already separated out, is separated from the solvent in a known manner. For example, to separate nitrobenzene, one can first dilute with alcohol, suction off and wash with alcohol and water.

   To separate the excess 1,4-diaminoanthraquinone, the crude dye can be extracted, for example, with 1000 parts of sulfuric acid with a content of 70 / o H2 SO. "

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Küpen- farbstoffes, dadurch gekennzeichnet, dass man ein in 2-Stellung durch Halogen substituiertes Pprazolanthron finit 1.4-Diaminoaiithrachil)on in Gegenwart eines alkalischen Kondensa tionsmittels in der Wärme behandelt. Der erhaltene Farbstoff färbt Baumwolle aus blauer Küpe in blauen Tönen, die an der Luft in ein grünstichiges Grau übergehen und löst sich in konzentrierter Schwefelsäure mit blauer Farbe. PATENT CLAIM: Process for the preparation of a vat dye, characterized in that a Pprazolanthron, which is substituted in the 2-position by halogen, is treated with heat in the presence of an alkaline condensation agent. The dye obtained dyes cotton from a blue vat in blue tones which change to a greenish gray in the air and dissolve in concentrated sulfuric acid with a blue color.
CH147045D 1929-01-10 1929-11-20 Process for the preparation of a vat dye. CH147045A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE147045X 1929-01-10
CH143401T 1929-06-11

Publications (1)

Publication Number Publication Date
CH147045A true CH147045A (en) 1931-05-15

Family

ID=25714284

Family Applications (1)

Application Number Title Priority Date Filing Date
CH147045D CH147045A (en) 1929-01-10 1929-11-20 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH147045A (en)

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