CH278472A - Process for the preparation of a cobalt-containing disazo dye. - Google Patents

Process for the preparation of a cobalt-containing disazo dye.

Info

Publication number
CH278472A
CH278472A CH278472DA CH278472A CH 278472 A CH278472 A CH 278472A CH 278472D A CH278472D A CH 278472DA CH 278472 A CH278472 A CH 278472A
Authority
CH
Switzerland
Prior art keywords
cobalt
dye
disazo dye
preparation
amino
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Sandoz
Original Assignee
Ag Sandoz
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 Ag Sandoz filed Critical Ag Sandoz
Publication of CH278472A publication Critical patent/CH278472A/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
    • C09B45/00—Complex metal compounds of azo dyes
    • C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/24—Disazo or polyazo compounds
    • C09B45/30—Disazo or polyazo compounds containing cobalt

Landscapes

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

Description

  

  Verfahren zur Herstellung eines     kobalthaltigen        Disazofarbstoffes.            (xegenstand    des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines Farb  stoffes, das dadurch gekennzeichnet ist, dass       rnan    die     Diazoverbindung    aus 1.

       1M1        4-Nitro-          2-amino-l-oxybenzol-6-sulfonsäure    mit     1Mol            1-Amino    - 8     -oxy        -naphthalin-4,6-disulfonsäure     kuppelt, den erhaltenen     Aminoazofarbstoff          diazotiert,    mit 1     Mol        2-Oxynaphthalin-6-sul-          fonsäure    zum     Disazofarbstoff    der Zusammen  setzung  
EMI0001.0019     
    vereinigt und diesen mit Kobalt abgebenden       -Mitteln    behandelt.  



  Im nachfolgenden Beispiel sind die Teile       Gewichtsteile.     



  <I>Beispiel.:</I>  23,4 Teile     4-Nitro-2-amino-l-oxybenzol-6-          sulfonsäure    werden auf übliche Weise     diazo-          tiert    und in Gegenwart von überschüssiger  Soda mit<B>31,9</B> Teilen     1-Amino-8-oxy-naphtha-          lin-4,6-disulfonsäure    gekuppelt. Der isolierte       Aminoazofarbstoff    wird hierauf weiter     diazo-          tiert.und    schliesslich mit 22,4 Teilen     2-Oxy-          naphthalin-6-sulfonsättre    gekuppelt.  



  Durch mehrstündiges     Erwärmen    auf 90  bis     95         (".    mit. einer     Natriumacetat    und 30 Teile         Kobaltsulfat    enthaltenden Lösung wird der  so gewonnene     Disazofarbstoff    in seinen     Ko-          baltkomplex    verwandelt. Der neue     kobalthal-          tige    Farbstoff färbt Leder in schönen grauen  Tönen von hervorragender     Liehtechtheit.  



  Process for the preparation of a cobalt-containing disazo dye. (The subject of the present patent is a process for the production of a dye, which is characterized in that the diazo compound from 1.

       1M1 couples 4-nitro-2-amino-1-oxybenzene-6-sulfonic acid with 1 mol 1-amino-8 -oxy-naphthalene-4,6-disulfonic acid, diazotizes the resulting aminoazo dye, with 1 mol 2-oxynaphthalene-6-sul - Fonsäure to the disazo dye of the composition
EMI0001.0019
    combined and treated with cobalt-releasing agents.



  In the example below, the parts are parts by weight.



  <I> Example .: </I> 23.4 parts of 4-nitro-2-amino-1-oxybenzene-6-sulfonic acid are diazotized in the usual way and in the presence of excess soda with <B> 31.9 < / B> Parts of 1-amino-8-oxy-naphthalin-4,6-disulfonic acid coupled. The isolated aminoazo dye is then diazo- tiert.and finally coupled with 22.4 parts of 2-oxynaphthalene-6-sulfonic saturate.



  By heating for several hours to 90 to 95 (". With a solution containing sodium acetate and 30 parts of cobalt sulfate, the disazo dye obtained in this way is converted into its cobalt complex. The new cobalt-containing dye dyes leather in beautiful gray tones with excellent lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines kobalt- haltigen Disazofarbstoffes, dadurch gekenn zeichnet., dass man die Diazoverbindung aus 1. Mol 4-Nitro - 2 - amino-l-oxybenzol-6-sulfon- s: PATENT CLAIM: Process for the production of a cobalt-containing disazo dye, characterized in that the diazo compound is obtained from 1 mole of 4-nitro-2-amino-1-oxybenzene-6-sulfone- s: äure mit 1 Mol 1-Amino-8-oxy-naphthalin- 4,6-disulfonsäure kuppelt, den erhaltenen Aminoazofarbstoff diazotiert, mit 1 Mb1 2 Oxynaphthalin-6-sulfonsäure zum Disazofarb- stoff der Zusammensetzung EMI0002.0001 vereinigt und diesen mit Kobalt abgebenden Mitteln behandelt. Der neue Farbstoff färbt. Leder in sehö- nen grauen Tönen von hervorragender Lieht- eehtheit. acid is coupled with 1 mole of 1-amino-8-oxynaphthalene-4,6-disulfonic acid, the resulting aminoazo dye is diazotized, with 1 Mb1 of 2 oxynaphthalene-6-sulfonic acid to form the disazo dye of the composition EMI0002.0001 united and treated this with cobalt releasing agents. The new dye stains. Leather in beautiful gray tones of excellent lightness.
CH278472D 1949-04-14 1949-04-14 Process for the preparation of a cobalt-containing disazo dye. CH278472A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH274242T 1949-04-14
CH278472T 1949-04-14

Publications (1)

Publication Number Publication Date
CH278472A true CH278472A (en) 1951-10-15

Family

ID=25731536

Family Applications (1)

Application Number Title Priority Date Filing Date
CH278472D CH278472A (en) 1949-04-14 1949-04-14 Process for the preparation of a cobalt-containing disazo dye.

Country Status (1)

Country Link
CH (1) CH278472A (en)

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