CH147043A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

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Publication number
CH147043A
CH147043A CH147043DA CH147043A CH 147043 A CH147043 A CH 147043A CH 147043D A CH147043D A CH 147043DA CH 147043 A CH147043 A CH 147043A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
vat dye
parts
violet
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 CH147043A publication Critical patent/CH147043A/en

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

Description

  

      Verfahren    zur Darstellung eines     Nüpenfarbstoffes.       Im Hauptpatent ist ein Verfahren zur  Darstellung eines neuen     Küpenfarbstoffes    be  schrieben; wonach man     Pyrazolanthron    mit       1-Amino-2-halogen-anthrachinon    in Gegenwart  von alkalischen Kondensationsmitteln in der  Wärme behandelt.  



  Es wurde nun gefunden, dass man den  gleichen wertvollen     Küpenfarbstoff    erhalten  kann, wenn man ein in     2-Stellung    durch  Halogen substituiertes     Pyrazolanthron    mit       1-Aminoantbrachirion    in Gegenwart eines al  kalischen Kondensationsmittels in der Wärme  behandelt.  



  Der erhaltene     Farbstoff    färbt Baumwolle  aus violetter     Küpe    in blauvioletten Tönen  und löst sich in konzentrierter Schwefelsäure  mit blauer Farbe.    <I>Beispiel:</I>    Man erhitzt eine Mischung von 11,6 Tei  len     2-Brompyrazolanthron,    17,6 Teilen     1-          Aminoatithrachirion,    7 Teilen Pottasche, 0,4    Teilen Kupferpulver und 100 Teilen     Nitro-          benzol    solange unter Rühren zum Sieden, bis  die     Farbstoffbildung    nicht mehr zunimmt.

    Hierauf lässt man erkalten und trennt den  zum grössten Teil bereits ausgeschiedenen  Farbstoff in bekannter Weise vom     Lösungs-          mittel    und den anorganischen Bestandteilen  des Reaktionsgemisches ab. Man kann zum  Beispiel zunächst zum Abtrennen vom     Nitro-          benzol    mit Alkohol verdünnen, absaugen und  mit Alkohol und Wasser waschen.

   Zur Ab  trennung vom überschüssigen     Aminoanthra-          chinon    kann man den rohen     Farbstoff    zum  Beispiel mit 1000 Teilen Schwefelsäure von       70%        H9S04-Gehalt        ausziehen.        Um        den        Farb-          stoff    in reine Form zu     bringen;    kristallisiert  man ihn zweckmässig aus kochendem     Dichlor-          benzol    um.



      Process for the preparation of a pimple dye In the main patent, a method for preparing a new vat dye is be written; after which pyrazolanthrone is treated with 1-amino-2-halogen-anthraquinone in the presence of alkaline condensing agents in the heat.



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



  The dye obtained dyes cotton from a violet vat in blue-violet shades and dissolves in concentrated sulfuric acid with a blue color. <I> Example: </I> A mixture of 11.6 parts of 2-bromopyrazole anthrone, 17.6 parts of 1-aminoatithrachirion, 7 parts of potash, 0.4 parts of copper powder and 100 parts of nitrobenzene is heated while stirring Boil until dye formation stops.

    It is then allowed to cool and most of the dye which has already separated out is separated off in a known manner from the solvent and the inorganic constituents of the reaction mixture. For example, to separate the nitrobenzene, it can first be diluted with alcohol, filtered off with suction and washed with alcohol and water.

   To separate from the excess aminoanthraquinone, the crude dye can be extracted, for example, with 1000 parts of sulfuric acid with 70% H9S04 content. To bring the dye into pure form; it is expedient to recrystallize it from boiling dichlorobenzene.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Küpen- farbstoffes, dadurch gekennzeichnet, dass man ein in 2-Stellung durch Halogen substituiertes Pyrazolanthron mit 1-Aminoanthrachinon in Gegenwart eines alkalischen Kondensations mittels in der Wärme behandelt. Der erhaltene Farbstoff färbt Baumwolle aus violetter liüpe in blauvioletten Tönen und löst sich in konzentrierter Schwefelsäure mit blauer Farbe. Claim: Process for the preparation of a vat dye, characterized in that a pyrazolanthrone substituted in the 2-position by halogen is treated with 1-aminoanthraquinone in the presence of an alkaline condensation agent with heat. The dye obtained dyes cotton from violet liüpe in blue-violet tones and dissolves in concentrated sulfuric acid with a blue color.
CH147043D 1929-01-10 1929-11-20 Process for the preparation of a vat dye. CH147043A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE147043X 1929-01-10
CH143401T 1929-06-11

Publications (1)

Publication Number Publication Date
CH147043A true CH147043A (en) 1931-05-15

Family

ID=25714282

Family Applications (1)

Application Number Title Priority Date Filing Date
CH147043D CH147043A (en) 1929-01-10 1929-11-20 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH147043A (en)

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