CH214905A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH214905A
CH214905A CH214905DA CH214905A CH 214905 A CH214905 A CH 214905A CH 214905D A CH214905D A CH 214905DA CH 214905 A CH214905 A CH 214905A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
methyl
yellow
azo dye
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH214905A publication Critical patent/CH214905A/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
    • C09B43/00—Preparation of azo dyes from other azo compounds
    • C09B43/02—Preparation of azo dyes from other azo compounds by sulfonation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

      Verfahren    zur Herstellung eines     Azofarbstoifes.       Es     wurde        gefunden,    dass man einen  neuen     Azofarbstoff        erhält,    wenn man den       Farbstoff    aus     diazotiertem    1- Amine - 4     -          methyl    - 2 -     nitrobenzol        und        3-Methyl-5-pyr-          azolon    mit     sulfonierenden        Mitteln    behandelt,

    so dass eine     Sulfonsäuregruppe    in das     Farb-          stoffmolekül    eintritt.  



  Der neue Farbstoff     bildet    ein gelbes       Pulver,    das sich in     Wasser    mit gelber Farbe  löst und     Acetatkunstseide        aus        wässriger    Lö  sung in gelben Tönen färbt.  



  <I>Beispiel:</I>  20     Teile    des     Farbstoffes,    den man er  hält     @durch    Vereinigen von     diazotiertem          1-Amino-4-methyl-2-nitrobenzol    mit     3-Me-          thyl-5-pyrazolon,    werden bei 30   in 200 Teile  einer<B>60%</B>     S03-haltigen    Schwefelsäure ein  getragen.     Man        steigert    die Temperaturlang  sam auf etwa 40   und     rührt    während 8 bis  10 Stunden.

       Nachdem    eine Probe des Farb  stoffes in     Wasser        .löslich    ist, wird die Masse  auf Eiswasser ausgetragen und der Farb-         stoff        abfiltriert.    Der     Farbstoff    wird hier  auf     mit        Wasser        angerührt    und mit     einem     Alkali     neutralisiert    und     gegebenenfalls        aus-          gesalzen.     



  Der trockene Farbstoff     bildet    ein     gelbes     Pulver, das     sissh    in Wasser mit gelber Farbe  löst und     Acetatkunstseide    aus     wässriger    Lö  sung in gelben Tönen färbt.



      Process for the production of an azo dye. It has been found that a new azo dye is obtained if the dye from diazotized 1- amines - 4 - methyl - 2 - nitrobenzene and 3-methyl-5-pyrazolone is treated with sulfonating agents,

    so that a sulfonic acid group enters the dye molecule.



  The new dye forms a yellow powder that dissolves in water with a yellow color and dyes acetate artificial silk from aqueous solution in yellow tones.



  <I> Example: </I> 20 parts of the dye that you get @ by combining diazotized 1-amino-4-methyl-2-nitrobenzene with 3-methyl-5-pyrazolone are at 30 in 200 Parts of a <B> 60% </B> S03-containing sulfuric acid are entered. The temperature is increased slowly sam to about 40 and stirred for 8 to 10 hours.

       After a sample of the dye is soluble in water, the mass is poured onto ice water and the dye is filtered off. The dye is mixed with water and neutralized with an alkali and, if necessary, salted out.



  The dry dye forms a yellow powder which dissolves in water with a yellow color and dyes acetate artificial silk from aqueous solution in yellow tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man den Farbstoff aus diazotiertem 1-A.mino- 4-methyl-2-nitrobenzol und 3-Methyl-5-pyr- azolon mit sulfonierenden Mitteln behandelt, so dass, PATENT CLAIM: Process for the preparation of a new azo dye, characterized in that the dye from diazotized 1-A.mino-4-methyl-2-nitrobenzene and 3-methyl-5-pyr-azolone is treated with sulfonating agents, so that, eine Suwlfonsäuregruppe in das Farb- stoffmolekül eintritt. Der neue Farbstoff bildet ein gelbes Pul ver, das sich in Wasser mit gelber Farbe löst und das Acetatkunstseide aus wässriger Lösung in gelben Tönen färbt. a sulfonic acid group enters the dye molecule. The new dye forms a yellow powder that dissolves in water with a yellow color and colors the acetate artificial silk from aqueous solution in yellow tones.
CH214905D 1939-07-21 1939-07-21 Process for the preparation of an azo dye. CH214905A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH214905T 1939-07-21

Publications (1)

Publication Number Publication Date
CH214905A true CH214905A (en) 1941-05-31

Family

ID=4448899

Family Applications (1)

Application Number Title Priority Date Filing Date
CH214905D CH214905A (en) 1939-07-21 1939-07-21 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH214905A (en)

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