CH261847A - Process for the preparation of an o, o'-dioxyazo dye. - Google Patents

Process for the preparation of an o, o'-dioxyazo dye.

Info

Publication number
CH261847A
CH261847A CH261847DA CH261847A CH 261847 A CH261847 A CH 261847A CH 261847D A CH261847D A CH 261847DA CH 261847 A CH261847 A CH 261847A
Authority
CH
Switzerland
Prior art keywords
dye
dioxyazo
preparation
violet
bath
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R 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 Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH261847A publication Critical patent/CH261847A/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
    • C09B45/14—Monoazo compounds
    • C09B45/16—Monoazo compounds containing chromium

Landscapes

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

Description

  

  Verfahren zur Herstellung eines     o,ö        -Dioxyazofarbstoffes.       Gegenstand vorliegenden Patentes bildet  ein Verfahren zur Herstellung eines     o,o'-Di-          öxyazofarbstoffes.    Das Verfahren ist dadurch  gekennzeichnet, dass man     diazotierte        2-Amino-          4-diisobutyl-phenol-6-sulfonsäure    in alkali  schem Medium     mit        1-Carbomethoxyamino-7-          oxynaphthalin    kuppelt.

   Der erhaltene neue  Farbstoff stellt ein dunkles Pulver dar, das  sich in Wasser mit     violettblauer,    in konzen  trierter Schwefelsäure mit rotvioletter Farbe  löst und Wolle aus saurem Bad in blauroten  Tönen färbt, die beim     Nachchromieren    nach       rotstichig    grau     umschlagen.    Nach dem     Ein-          badehromierverfahren    erhält man auf Wolle  ein sehr gut lichtechtes     rotstichiges    Grau.

      <I>Beispiel:</I>    60,2 Teile     2-Amino-4-diisobutyl-phenol-6-          sulfonsäure    werden als     Natriumsalz    in 500 Tei  len     Wasser    gelöst und nach Zusatz von 6,9 Tei  len     Natriumnitritwie    üblich indirekt     diazotiert.     Die     Diazoverbindung    lässt man in eine Lösung  von 45,6 Teilen 1-Carbomethoxyamino-7-oxy-         naphthalin    in 500 Teilen Wasser,

   22 Teilen  Natronlauge 40      %        ig    und 50 Teilen     calcinier-          tem        Natriumcarbonat    bei 0 bis 5  C einfliessen.  Nach einigen Stunden Rühren filtriert man  den fertiggebildeten Farbstoff ab und trock  net ihn.



  Process for the preparation of an o, ö -dioxyazo dye. The subject of the present patent forms a process for the preparation of an o, o'-dioxyazo dye. The process is characterized in that diazotized 2-amino-4-diisobutyl-phenol-6-sulfonic acid is coupled with 1-carbomethoxyamino-7-oxynaphthalene in an alkaline medium.

   The new dye obtained is a dark powder that dissolves in water with violet-blue in concentrated sulfuric acid with red-violet color and dyes wool from an acid bath in blue-red tones that turn to reddish gray when re-chromed. A very lightfast reddish gray is obtained on wool using the single-bath homing process.

      <I> Example: </I> 60.2 parts of 2-amino-4-diisobutyl-phenol-6-sulfonic acid are dissolved as the sodium salt in 500 parts of water and, after addition of 6.9 parts of sodium nitrite, indirectly diazotized as usual. The diazo compound is left in a solution of 45.6 parts of 1-carbomethoxyamino-7-oxynaphthalene in 500 parts of water,

   22 parts of 40% sodium hydroxide solution and 50 parts of calcined sodium carbonate are poured in at 0 to 5 ° C. After a few hours of stirring, the finished dye is filtered off and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines o,o'-Di- oxyazofarbstoffes, dadurch gekennzeichnet, dass man diazotierte 2-Amino-4-diisobutyl-phe- nol-6-sulfonsäure in alkalischem Medium mit 1-Carbomethoxyamino-7-oxynaphthalin kup pelt. PATENT CLAIM: Process for the production of an o, o'-dioxyazo dye, characterized in that diazotized 2-amino-4-diisobutyl-phenol-6-sulfonic acid is coupled with 1-carbomethoxyamino-7-oxynaphthalene in an alkaline medium. Der erhaltene neue Farbstoff stellt ein dunkles Pulver dar, das sich in Wasser mit violettblauer, in konzentrierter Schwefelsäure mit rotvioletter Farbe löst und Wolle aus saurem Bad in blauroten Tönen färbt, die beim Nachchromieren nach rotstichig grau umschlagen. Nach dem Einbadchromierver- fahren erhält man auf Wolle ein sehr gut lichtechtes rotstichiges Grau. The new dye obtained is a dark powder that dissolves in water with a violet-blue color, in concentrated sulfuric acid with a red-violet color and dyes wool from an acid bath in blue-red tones that turn to a reddish gray when re-chromed. The single-bath chrome plating process produces a very lightfast reddish gray on wool.
CH261847D 1946-11-22 1946-11-22 Process for the preparation of an o, o'-dioxyazo dye. CH261847A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH261847T 1946-11-22
CH256234T 1948-08-15

Publications (1)

Publication Number Publication Date
CH261847A true CH261847A (en) 1949-05-31

Family

ID=25729960

Family Applications (1)

Application Number Title Priority Date Filing Date
CH261847D CH261847A (en) 1946-11-22 1946-11-22 Process for the preparation of an o, o'-dioxyazo dye.

Country Status (1)

Country Link
CH (1) CH261847A (en)

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