CH242611A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH242611A
CH242611A CH242611DA CH242611A CH 242611 A CH242611 A CH 242611A CH 242611D A CH242611D A CH 242611DA CH 242611 A CH242611 A CH 242611A
Authority
CH
Switzerland
Prior art keywords
dye
production
azo dye
sulfonic acid
new azo
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH242611A publication Critical patent/CH242611A/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
    • C09B43/40—Preparation of azo dyes from other azo compounds by substituting hetero atoms by radicals containing other hetero atoms
    • C09B43/42—Preparation of azo dyes from other azo compounds by substituting hetero atoms by radicals containing other hetero atoms by substituting radicals containing hetero atoms for —CN radicals

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

Description

  

  Verfahren zur Herstellung     eines    neuen     Azofarbstoifes.       Es wurde     gefunden,    dass man zu einem  neuen     Azofarbstoff    gelangt, wenn man den       1Vlonoazofarbstoff,    der erhältlich ist     durch     Vereinigen der     Diazoverbindung    der     1-Oxy-          2-amino-4-chlorbenzol-6-sulfonsäure    mit     2-          Oxynaphthalin.-4-sulfonsäure,    in     wässeriger     Lösung mit     Cyannatrium    bei erhöhter Tem  peratur umsetzt.  



  Der so erhaltene Farbstoff bildet ein  schwarzes Pulver. Er färbt Wolle aus sau  rem Bade in     Bordeaux-Tönen.    Durch Nach  chromierung erhält man ein reines,     farbstarkes     Blau von sehr guten Echtheitseigenschaften.    <I>Beispiel:</I>    458 Teile des Farbstoffes aus     diazotierter     1-     Oxy    - 2     -amino    - 4 -     chlorbenzol-6-sulfönsäure     mit     2-Oxynaphthalin-4-sulfonsäure    werden     in     der     10fachen    Menge Wasser angerührt.

   Dazu  gibt man 55 Teile     Cyannatrium    in wenig  Wasser gelöst.     Innert    4     Stunden    erwärmt    man auf 80 bis 90  und rührt 12     Stunden    bei  dieser Temperatur. Nach dem Abkühlen wird  der Farbstoff mit     Natriumchlorid        ausge-          salzen,        abgenutscht    und getrocknet.



  Process for the production of a new azo dye. It has been found that a new azo dye is obtained if the 1Vlonoazo dye, which is obtainable by combining the diazo compound of 1-oxy-2-amino-4-chlorobenzene-6-sulfonic acid with 2-oxynaphthalene-4-sulfonic acid, in aqueous solution with cyan sodium at elevated tem perature implemented.



  The dye thus obtained forms a black powder. He dyes wool from acid bath in shades of Bordeaux. After chroming, a pure, deeply colored blue with very good fastness properties is obtained. <I> Example: </I> 458 parts of the dye from diazotized 1-oxy-2-amino-4-chlorobenzene-6-sulfonic acid with 2-oxynaphthalene-4-sulfonic acid are mixed in 10 times the amount of water.

   To this are added 55 parts of sodium cyanide dissolved in a little water. The mixture is heated to 80 to 90 within 4 hours and stirred for 12 hours at this temperature. After cooling, the dye is salted out with sodium chloride, suction filtered and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes; dadurch gekennzeichnet, dass man den 1Vlonoazofarbstoff, der erhältlich ist durch Vereinigen der Diazoverbindung der 1- Oxy-2-amina-4-chlorbenzol-6-sulfonsäure mit 2-Öxynaphthalin-4-sulfonsäure, in wässe riger Lösung mit Cyannatrium bei erhöhter Temperatur umsetzt. ' Der so erhaltene Farbstoff bildet ein schwarzes Pulver. PATENT CLAIM: Process for the production of a new azo dye; characterized in that the 1Vlonoazo dye, which is obtainable by combining the diazo compound of 1-oxy-2-amina-4-chlorobenzene-6-sulfonic acid with 2-oxynaphthalene-4-sulfonic acid, is reacted in an aqueous solution with cyan sodium at an elevated temperature . The dye thus obtained forms a black powder. Er färbt Wolle aus saurem Bade in Bordeaux-Tönen. Durch Nachchro- mierung erhält man ein reines, farbstarkes Blau von sehr guten Echtheitseigenschaften. He dyes wool from an acid bath in shades of Bordeaux. Post-chrome plating gives a pure, deeply colored blue with very good fastness properties.
CH242611D 1944-01-26 1944-01-26 Process for the production of a new azo dye. CH242611A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH242611T 1944-01-26

Publications (1)

Publication Number Publication Date
CH242611A true CH242611A (en) 1946-05-31

Family

ID=4463053

Family Applications (1)

Application Number Title Priority Date Filing Date
CH242611D CH242611A (en) 1944-01-26 1944-01-26 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH242611A (en)

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