CH147700A - Process for the preparation of a vat dye. - Google Patents

Process for the preparation of a vat dye.

Info

Publication number
CH147700A
CH147700A CH147700DA CH147700A CH 147700 A CH147700 A CH 147700A CH 147700D A CH147700D A CH 147700DA CH 147700 A CH147700 A CH 147700A
Authority
CH
Switzerland
Prior art keywords
preparation
vat
mol
vat dye
blue
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 CH147700A publication Critical patent/CH147700A/en

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

Description

  

  Verfahren zur Darstellung eines     Küpenfarbstoffes.       Im Hauptpatent ist ein Verfahren zur  Darstellung eines Chlor und Brom enthaltenden       Küpenfarbstoffes    beschrieben, bei dem<B>1</B>     Mol          Isodibenzanthron    in Gegenwart von     Chlorsul-          fonsäure    und von Katalysatoren mit mindestens  einem halben     Mol    eines     brornierenden    Mittels  behandelt wird.  



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



  Der neue Farbstoff, ein     Monobromisodibenz-          anthron,    löst sich in konzentrierter Schwefel  säure mit grüner Farbe und färbt Baumwolle  aus blauer     Küpe    in ausserordentlich klaren  und kräftigen blauvioletten Tönen von sehr  guter Echtheit.  



  <I>Beispiel:</I>  46 Teile reines     Isodibenzanthron    werden  in 460 Teilen     Chlorsulfonsäure    gelöst. Nach    Zugabe von 1,2 Teilen Mangan     und   <B>9</B> Teilen  Brom erhöht man die Temperatur auf       25-301        C    und rührt dabei     so    lange, bis  alles Brom aufgenommen ist. Nach dem Er  kalten verdünnt man mit konzentrierter  Schwefelsäure, giesst in Wasser und saugt ab.  



  Statt Mangan können auch andere Metalle  oder     Hetallverbindungen,    zum Beispiel Queck  silber, Arsen, Wismut oder Eisen oder deren  Verbindungen angewandt werden.  



  Die Reaktion kann auch bei tieferer Tem  peratur, zum Beispiel bei<B>-5</B> bis<B>0 '</B>     C,    durch  geführt werben.



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



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



  The new dye, a monobromoisodibenzanthrone, dissolves in concentrated sulfuric acid with a green color and dyes cotton from a blue vat in extremely clear and strong blue-violet shades of very good fastness.



  <I> Example: </I> 46 parts of pure isodibenzanthrone are dissolved in 460 parts of chlorosulfonic acid. After adding 1.2 parts of manganese and 9 parts of bromine, the temperature is increased to 25-301 ° C. and the mixture is stirred until all of the bromine has been absorbed. After the cold, it is diluted with concentrated sulfuric acid, poured into water and filtered off with suction.



  Instead of manganese, other metals or metal compounds, for example mercury, arsenic, bismuth or iron or their compounds, can also be used.



  The reaction can also be carried out at a lower temperature, for example at <B> -5 </B> to <B> 0 '</B> C.

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Darstellung eiiie3 Küpen- larbstoffes, dadurch gekennzeichnet, dass man <B>1</B> Mol Isodibenzarithron in saurem Medium in Gegenwart einer Metallverbindung mit miadestens 1/2 Mol eines bromierend wirken den<B>M</B> ittels behandelt. <B> PATENT CLAIM: </B> Process for the preparation of a vat substance, characterized in that <B> 1 </B> mol isodibenzarithrone in an acid medium in the presence of a metal compound with at least 1/2 mol of a brominating effect is used B> M </B> ittels treated. Der neue Farbstoff, ein Monobromisodibenz- anthron, löst sich in konzentrierter Schwefel säure mit grüner Farbe und färbt Baumwolle aus blauer Küpe in ausserordentlich klaren und kräftigen blauvioletten Tönen von sehr guter Echtheit. The new dye, a monobromoisodibenzanthrone, dissolves in concentrated sulfuric acid with a green color and dyes cotton from a blue vat in extremely clear and strong blue-violet shades of very good fastness.
CH147700D 1929-03-12 1930-02-12 Process for the preparation of a vat dye. CH147700A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH141548T 1929-03-12
DE147700X 1929-03-30

Publications (1)

Publication Number Publication Date
CH147700A true CH147700A (en) 1931-06-15

Family

ID=25713870

Family Applications (1)

Application Number Title Priority Date Filing Date
CH147700D CH147700A (en) 1929-03-12 1930-02-12 Process for the preparation of a vat dye.

Country Status (1)

Country Link
CH (1) CH147700A (en)

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