CH147701A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

Info

Publication number
CH147701A
CH147701A CH147701DA CH147701A CH 147701 A CH147701 A CH 147701A CH 147701D A CH147701D A CH 147701DA CH 147701 A CH147701 A CH 147701A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
vat
vat dye
mol
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 CH147701A publication Critical patent/CH147701A/en

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

Description

  

  Verfahren     zur    Darstellung eines     güpenfarbstoifes.       Im Hauptpatent ist ein Verfahren zur  Darstellung eines Chlor und Brom enthalten  den     Küpenfarbstoffes    beschrieben, bei dein  1     Mol.        Isodibenzanthron    in Gegenwart von       Chlorsulfonsäure    und von Katalysatoren mit  mindestens einem halben     Mol.    eines     bromie-          renden    Mittels behandelt wird.  



  Es wurde nun gefunden, dass man eben  falls einen wertvollen     Küpenfarbstoff    erhält,  wenn man 1     Mol.        Dibenzanthron    in saurem  Medium in Gegenwart einer Metallverbindung  mit mindestens     1/s        Mol.    eines     bromierend     wirkenden Mittels behandelt.  



  Der neue Farbstoff, ein     Monobromdibenz-          anthron,    löst sich in konzentrierter Schwefel  säure mit violetter Farbe, liefert eine blau  violette     Küpe,    aus der Baumwolle in dunkel  blauen Tönen gefärbt wird.  



  <I>Beispiel:</I>  46 Teile reines     Dibenzanthron    werden in       4$0    Teilen     Chlorsulfonsäure    gelöst. Nach Zu-         gabe    von 1,2 Teilen Mangan und 9 Teilen  Brom erhöht man die     Temperatur    auf 25  bis 30   C und rührt dabei so lange, bis alles  Brom aufgenommen ist. Nach dem Erkalten  verdünnt man mit     konzentrierter    Schwefel  säure, giesst in Wasser und saugt ab.  



  Statt Mangan können auch andere Me  talle oder Metallverbindungen, z. B. von Queck  silber, Arsen, Wismut oder Eisen oder deren  Verbindungen, angewandt werden.  



  Die Reaktion kann auch bei tieferer Tem  peratur, z. B. bei - 5 bis 0   C durchge  führt werden.



  Process for the representation of a quality dye. The main patent describes a process for the preparation of a chlorine and bromine containing vat dye, in which 1 mole of isodibenzanthrone is treated in the presence of chlorosulfonic acid and catalysts with at least half a mole of a brominating agent.



  It has now been found that a valuable vat dye is also obtained if 1 mole of dibenzanthrone is treated in an acidic medium in the presence of a metal compound with at least 1 / s mole of a brominating agent.



  The new dye, a monobromodibenz anthrone, dissolves in concentrated sulfuric acid with a violet color and produces a blue-violet vat from which cotton is dyed in dark blue tones.



  <I> Example: </I> 46 parts of pure dibenzanthrone are dissolved in 4 $ 0 parts of chlorosulfonic acid. After adding 1.2 parts of manganese and 9 parts of bromine, the temperature is increased to 25 to 30 ° C. and the mixture is stirred until all of the bromine has been absorbed. After cooling, it is diluted with concentrated sulfuric acid, poured into water and filtered off with suction.



  Instead of manganese, other metals or metal compounds such. B. of mercury, arsenic, bismuth or iron or their compounds can be used.



  The reaction can also temperature at lower Tem, z. B. at -5 to 0 C. Runaway leads.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Küpen- farbstoffes, dadurch gekennzeichnet, dass man 1 Mol. Dibenzanthron in saurem Medium in Gegenwart einer Metallverbindung mit min- destens 1/9 Mol. eines bromierend wirkenden Mittels behandelt. Der neue Farbstoff, ein Monobroindibenz- anthron, löst sich in konzentrierter Schwefel säure mit violetter Farbe, liefert eine blau- violette Küpe, aus der Baumwolle in dunkel blauen Tönen gefärbt wird. Claim: Process for the preparation of a vat dye, characterized in that 1 mol. Of dibenzanthrone is treated in an acidic medium in the presence of a metal compound with at least 1/9 mol. Of a brominating agent. The new dye, a monobroindibenz anthrone, dissolves in concentrated sulfuric acid with a violet color, provides a blue-violet vat from which cotton is dyed in dark blue tones.
CH147701D 1929-03-12 1930-02-12 Process for the preparation of a vat dye. CH147701A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH141548T 1929-03-12
DE147701X 1929-03-30

Publications (1)

Publication Number Publication Date
CH147701A true CH147701A (en) 1931-06-15

Family

ID=25713871

Family Applications (1)

Application Number Title Priority Date Filing Date
CH147701D CH147701A (en) 1929-03-12 1930-02-12 Process for the preparation of a vat dye.

Country Status (2)

Country Link
AT (1) AT124261B (en)
CH (1) CH147701A (en)

Also Published As

Publication number Publication date
AT124261B (en) 1931-08-25

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