CH278186A - Process for the preparation of a chromium-containing disazo dye. - Google Patents

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

Info

Publication number
CH278186A
CH278186A CH278186DA CH278186A CH 278186 A CH278186 A CH 278186A CH 278186D A CH278186D A CH 278186DA CH 278186 A CH278186 A CH 278186A
Authority
CH
Switzerland
Prior art keywords
chromium
dye
amino
preparation
disazo dye
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 CH278186A publication Critical patent/CH278186A/en

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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
    • C09B45/26—Disazo or polyazo compounds containing chromium

Landscapes

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

Description

  

  Zusatzpatent zum Hauptpatent Nr. 274242.    Verfahren zur Herstellung eines     ebromhaltigen        Disazofarbstoffes.       Die vorliegende Erfindung betrifft ein  Verfahren zur Herstellung eines chromhaltigen       Disazofarbstoffes,    welches darin besteht, dass  man     4-Nitro-2-amino-l-oxybenzol-6-sulfonsäure          diazotiert,    mit     1-Amino-8-oxynaphthalin-3,6-          disulfonsäure    kuppelt, den erhaltenen     Amino-          azofarbstoff        weiterdiazotiert,

      mit     2-Oxynaph-          thalin-6-sulfonsäure    kuppelt und den nun  mehr vorliegenden     Disazofarbstoff    mit chrom  abgebenden Mitteln behandelt.  



  <I>Beispiel:</I>  Der durch     sodaalkalische        Kupplung    aus  23,4 Teilen     diazotierter        4-Nitro-2-amino-l-oxy-          benzol-6-sulfonsäure    und 31,9 Teilen     1-Amino-          8-oxynaphthalin-3,6-disulfonsäure    erhaltene       Aminoazofarbstoff    wird     weiterdiazotiert    und  hierauf mit 22,4 Teilen des     Natriumsalzes    der       2-Oxynaphthalin-6-sulfonsäure    gekuppelt.

   Zur  Überführung in die     Chromkomplexverbindung     wird der so erhaltene     Disazofarbstoff    in 1000    Teilen Wasser mit 40 Teilen     Chromfluorid    in  Gegenwart von     Natriumaeetat    mehrere Stun  den am     Rückflusskühler    gekocht.  



  Der neue Farbstoff färbt Leder in     sehö-          nem    neutralem Grau von ausgezeichneter  Lichtechtheit.



  Additional patent to main patent no. 274242. Process for the production of an ebromine-containing disazo dye. The present invention relates to a process for the preparation of a chromium-containing disazo dye, which consists in diazotizing 4-nitro-2-amino-1-oxybenzene-6-sulfonic acid with 1-amino-8-oxynaphthalene-3,6-disulfonic acid , further diazotizes the amino azo dye obtained,

      coupled with 2-oxynaphthalene-6-sulfonic acid and treated the disazo dye now present with chromium-releasing agents.



  <I> Example: </I> The soda-alkaline coupling of 23.4 parts of 4-nitro-2-amino-1-oxybenzene-6-sulfonic acid and 31.9 parts of 1-amino-8-oxynaphthalene-3 , 6-disulfonic acid obtained aminoazo dye is further diazotized and then coupled with 22.4 parts of the sodium salt of 2-oxynaphthalene-6-sulfonic acid.

   To convert the disazo dye thus obtained into the chromium complex compound, it is boiled in 1000 parts of water with 40 parts of chromium fluoride in the presence of sodium acetate for several hours on the reflux condenser.



  The new dye dyes leather in a beautiful neutral gray with excellent lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines ehrom- haltigen Disazofarbstoffes, dadurch gekenn zeichnet, dass man 4-Nitro-2-amino-l-oxyben- zol-6-sulfonsäure diazotiert, mit 1-Amino-8- oxy naphthalin-3,6-disulfonsäure kuppelt, den erhaltenen Aminoazofarbstoff weiterdiazotiert, PATENT CLAIM: Process for the production of a disazo dyestuff containing Ehrom, characterized in that 4-nitro-2-amino-1-oxybenzene-6-sulfonic acid is diazotized with 1-amino-8-oxy naphthalene-3,6 disulfonic acid couples, further diazotizes the aminoazo dye obtained, mit 2 - Oxynaphthalin - 6 - sulfonsäure kuppelt und den nunmehr vorliegenden Disazofarb- stoff mit chromabgebenden Mitteln behandelt. Der neue Farbstoff färbt Leder in schö nem neutralem Grau von ausgezeichneter Lichtechtheit. with 2 - oxynaphthalene - 6 - sulfonic acid and treats the disazo dye that is now present with chromium-releasing agents. The new dye dyes leather in a beautiful neutral gray with excellent lightfastness.
CH278186D 1949-04-14 1950-01-03 Process for the preparation of a chromium-containing disazo dye. CH278186A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH274242T 1949-04-14
CH278186T 1950-01-03

Publications (1)

Publication Number Publication Date
CH278186A true CH278186A (en) 1951-09-30

Family

ID=25731534

Family Applications (1)

Application Number Title Priority Date Filing Date
CH278186D CH278186A (en) 1949-04-14 1950-01-03 Process for the preparation of a chromium-containing disazo dye.

Country Status (1)

Country Link
CH (1) CH278186A (en)

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