CH168623A - Process for the preparation of a new disazo dye. - Google Patents

Process for the preparation of a new disazo dye.

Info

Publication number
CH168623A
CH168623A CH168623DA CH168623A CH 168623 A CH168623 A CH 168623A CH 168623D A CH168623D A CH 168623DA CH 168623 A CH168623 A CH 168623A
Authority
CH
Switzerland
Prior art keywords
preparation
disazo dye
new disazo
dye
parts
Prior art date
Application number
Other languages
German (de)
Inventor
Limited Imperial Ch Industries
Original Assignee
Ici Ltd
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 Ici Ltd filed Critical Ici Ltd
Publication of CH168623A publication Critical patent/CH168623A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
    • C09B31/02—Disazo dyes
    • C09B31/08—Disazo dyes from a coupling component "C" containing directive hydroxyl and amino groups

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Description

  

  Zusatzpatent zum Hauptpatent     Nr.        164839.       Verfahren zur Herstellung eines neuen     Disazofarbstoffes.       Gegenstand der vorliegenden Erfindung  ist ein Verfahren     zur    Herstellung eines neuen       Disazofarbstoffes.    Dasselbe zeichnet sich da  durch aus,     dass    man     diazotiertes        o-Toluidin     in einem Säuremedium mit     2:5-Dimethoxy-          anilin    verbindet, die resultierende     Aminoazo-          verbindung        rediazotiert    und mit<B>1:

  </B>     5-Amino-          naplitol    in einem Säuremedium verbindet.  Der Farbstoff gibt klar blaue Farbtöne auf       Azetatseide.     



  <I>Beispiel:</I>  Die durch     Diazotierung    von<B>107</B> Teilen  von     o-Toluidin    in bekannter Weise erhaltene  Lösung wird einer Lösung von     153    Teilen  von 2<B>-- 5 -</B>     Dimethoxyanilin    in<B>370</B> Teilen  <B>10</B>     '/oiger        Chlorwasserstoffsäure    und<B>6000</B>  Teilen Wasser bei<B>101) C</B> zugesetzt.

   Wenn  die Kombination vollständig ist, wird die er  haltene     Aminoazoverbindung    durch Zusatz  von<B>72</B> Teilen     Natriumnitrat        diazotiert    und  das Gemisch bei<B>10' C</B> umgerührt, bis die       Diazotierung    vollständig ist, wobei die     Diazo-          Azoverbindung    in Lösung ist.    Diese Lösung wird dann einer Lösung  von<B>159</B> Teilen<B>1 - 5 -</B>     Aminonaphtol.    in<B>370</B>  Teilen<B>10</B>     '/oiger        Chlorwasserstoffsäure    und  <B>8000</B> Teilen Wasser zugesetzt, und das Ge  misch wird umgerührt, bis die Kombination  vollständig ist.

   Der sich aus der Lösung er  gebende Farbstoff wird dann     abfiltriert,    mit  Wasser gewaschen und als Teig     aufbewahrt-          oder    er kann auch auf irgend eine bekannte  Weise getrocknet werden.



  Additional patent to main patent no. 164839. Process for the production of a new disazo dye. The present invention relates to a process for the preparation of a new disazo dye. The same is characterized by the fact that diazotized o-toluidine is combined with 2: 5-dimethoxyaniline in an acid medium, the resulting aminoazo compound is rediazotized and with <B> 1:

  </B> 5-amino naplitol in an acid medium combines. The dye gives clear blue shades on acetate silk.



  <I> Example: </I> The solution obtained by diazotizing <B> 107 </B> parts of o-toluidine in a known manner becomes a solution of 153 parts of 2 <B> - 5 - </B> Dimethoxyaniline in <B> 370 </B> parts of <B> 10 </B> '/% hydrochloric acid and <B> 6000 </B> parts of water at <B> 101) C </B>.

   When the combination is complete, the aminoazo compound obtained is diazotized by adding 72 parts of sodium nitrate and the mixture is stirred at 10 ° C. until the diazotization is complete, the diazo - the azo compound is in solution. This solution is then a solution of <B> 159 </B> parts of <B> 1 - 5 - </B> aminonaphtol. in <B> 370 </B> parts of <B> 10 </B> '/% hydrochloric acid and <B> 8000 </B> parts of water, and the mixture is stirred until the combination is complete.

   The dye which emerges from the solution is then filtered off, washed with water and stored as a dough - or it can also be dried in any known manner.

Claims (1)

PATENTANSPRUCIEI: Verfahren zur Herstellung eines neuen Disazofarbstoffes, dadurch gekennzeichnet, dass man diazotiertes o-Toluidin in einem Säure medium mit 2:5-Dimetboxyanilin verbindet, die resultierende Aminoazoverbindung redia- zotiert und mit 1:5-Aininonaphtol in einem Säuremedium verbindet. Der Farbstoff gibt klar blaue Farbtöne auf Azetatseide. PATENT CLAIM: Process for the production of a new disazo dye, characterized in that diazotized o-toluidine is combined in an acid medium with 2: 5-dimetboxyaniline, the resulting aminoazo compound is redia- zotated and combined with 1: 5-Aininonaphtol in an acid medium. The dye gives clear blue shades on acetate silk.
CH168623D 1933-04-13 1933-04-13 Process for the preparation of a new disazo dye. CH168623A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH168623T 1933-04-13
CH164839T 1933-04-13

Publications (1)

Publication Number Publication Date
CH168623A true CH168623A (en) 1934-04-15

Family

ID=25718057

Family Applications (1)

Application Number Title Priority Date Filing Date
CH168623D CH168623A (en) 1933-04-13 1933-04-13 Process for the preparation of a new disazo dye.

Country Status (1)

Country Link
CH (1) CH168623A (en)

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