CH230632A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH230632A
CH230632A CH230632DA CH230632A CH 230632 A CH230632 A CH 230632A CH 230632D A CH230632D A CH 230632DA CH 230632 A CH230632 A CH 230632A
Authority
CH
Switzerland
Prior art keywords
azo dye
dye
preparation
acid
yellow
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 CH230632A publication Critical patent/CH230632A/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
    • C09B56/00—Azo dyes containing other chromophoric systems
    • C09B56/04—Stilbene-azo dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

      Zusatzpatent    zum Hauptpatent Nr.     22ä5"59.       Verfahren zur Herstellung eines     Azofarbstoffes.            Gegenstand    vorliegender     Erfindung    ist       ein        Verfahren    zur Herstellung eines     Azofarb-          stoffes.    Das     Vierfahren    ist dadurch     gekenn-          zeicInet,        dass        man        4,4'-Dinitrostilben-2,2'-          di,sulfansäure        in,

          natronalkalischer        Lösung     mit 1     Mol        1,4-Diaminobenzolsulfonsiäure    bei       einer        Temperatur        unter    50      kondensiert.     



  Der neue Farbstoff     stellt    ein     braunes          Pulver    dar,     das        ssäch    in Wasser mit     ,gelber     Farbe     löst        und    Baumwolle in gelben     Tönen          färbt.    Er     soll    vor     allem    als     Zwischenpro,d!ukt          zum    Aufbau     anderer        Rarbsteffe        verwendet     werden.  



  <I>Beispiel:</I>  43     Gewichtsteile        4,4'-Dinitrosti@lbenr2,2'-          d"isulfons,äure    werden in     ungefähr    700     Ge-          wi.chtsteile    5      %        ibger        Natronlauge        gelöst,    mit  19     Gewichtsteilen        1,4-Diaminobenz@odisulflon-          säure        versetzt        und;

          ungefähr    12     Stunden    bei  einer     Temperatur    von 45      gehalten.    Nach  dieser Zeit ist der Farbstoff zum     grössten    Teil    ausgefallen. Um ihn völlig zu     isolieren,    gibt  man noch. etwas     Kochsalz    zu.

   Der Farbstoff  hat     folgende    Konstitution-  
EMI0001.0066     
         Das        erhaltene    Produkt     ist    ein     gelber          Farbstoff    und     durch.    einen     rotvioletten          Säureumschl:ag        gekennzeichnet.  



      Additional patent to main patent no. 22-5 "59. Process for the production of an azo dye. The subject of the present invention is a process for the production of an azo dye. The four-way process is characterized in that 4,4'-dinitrostilbene-2,2'- di, sulfanic acid in,

          Sodium alkaline solution with 1 mol of 1,4-diaminobenzenesulfonic acid condensed at a temperature below 50.



  The new dye is a brown powder that dissolves in water with a yellow color and dyes cotton in yellow tones. It should be used primarily as an intermediate product for building up other color strengths.



  <I> Example: </I> 43 parts by weight of 4,4'-Dinitrosti @ lbenr2,2'- d "isulfonic acid are dissolved in about 700 parts by weight of 5% sodium hydroxide solution, with 19 parts by weight of 1,4- Diaminobenzodisulflonic acid added and;

          held at a temperature of 45 for about 12 hours. After this time, most of the dye has precipitated. In order to isolate him completely, you still give. add some table salt.

   The dye has the following constitution
EMI0001.0066
         The product obtained is a yellow dye and through. marked with a red-violet acid envelope: ag.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- sloffes, dadurch gekennzeichnet, :dass man 4,4'-Dinitrostäben-2,2'-disulfonsäuire in na- tro@nalkalisehe,r Lösung mit 1 --Hol 1,4-Di- aminobenzolou,Ifo#nsäurs bei einer Tempera tur unter 50 kondensiert. Der neue Farbstoff stellt ein braunes Pulver dar, PATENT CLAIM: Process for the production of an azo dye, characterized in that: 4,4'-Dinitrostäben-2,2'-disulphonic acid in a nitro @ nalkalisehe, r solution with 1 -Hol 1,4-diaminobenzolou , Ifonic acid condenses at a temperature below 50. The new dye is a brown powder, das sich in Wasss,eir mit gelber Farbe löst und Baumwolle in gelben Tönen färbt. which dissolves in water with a yellow color and dyes cotton in yellow tones.
CH230632D 1940-04-29 1941-08-15 Process for the preparation of an azo dye. CH230632A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE230632X 1940-04-29
CH225559T 1941-08-15

Publications (1)

Publication Number Publication Date
CH230632A true CH230632A (en) 1944-01-15

Family

ID=25726909

Family Applications (1)

Application Number Title Priority Date Filing Date
CH230632D CH230632A (en) 1940-04-29 1941-08-15 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH230632A (en)

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