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CH257111A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH257111A
CH257111A CH257111DA CH257111A CH 257111 A CH257111 A CH 257111A CH 257111D A CH257111D A CH 257111DA CH 257111 A CH257111 A CH 257111A
Authority
CH
Switzerland
Prior art keywords
violet
dye
acid
green
azo dye
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 CH257111A publication Critical patent/CH257111A/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)
  • Thiazole And Isothizaole Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Herstellung eines     Azofarbstoffes.       Es     wurde        gefunden,    dass .ein     wertvoller          Azofarbstoff        hergestellt    werden kann, wenn  man     diazotierte        4-Nitro-2-amino-l-phenol-6-          sulfonsäure    mit     2-Oxy-6-methoxynaphthalin     kuppelt.  



  Der neue Farbstoff     stellt    ein violett  schwarzes Pulver dar, das sich in Wasser  mit violetter, -in     verdünnter    Natronlauge mit       braunstichig        bordeauxroter    und in konzen  trierter     Schwefelsäure    mit     violettroter    Farbe  löst. Er färbt Wolle     aus    saurem Bade in  gleichmässigen     violettbraunen    Tönen, die  durch     Nachchromieren    in ein ausgezeichnet  walk-,     potting-    und     lichtechtes        Olivegrün     übergeführt werden.

   Der     netze        Farbstoff     eignet sich auch vorzüglich zum Färben nach  dem     Einbadchromierverfahren,    wobei eben  falls,     echte        olivegrüne    Färbungen erhalten  werden.  



  Die Kupplung erfolgt zweckmässig in  alkalischem, z. B.     Alkalihydroxyd    und ge  gebenenfalls     Alkalicarbonat,    enthaltendem  Medium.  



       Beispiel:     23,4 Teile     4-Nitro-2-amino-l-phenol-6-          sulfonsäure    werden in bekannter     Weise    dia-         zotiert        und    in alkalischer Lösung mit 18       Teilen        2-Oxy-6-methoxynaphthalin    gekup  pelt. Der erhaltene     Farbstoff    wird     abfiltmert     und     getrocknet.  



  Process for the preparation of an azo dye. It has been found that a valuable azo dye can be produced when diazotized 4-nitro-2-amino-1-phenol-6-sulfonic acid is coupled with 2-oxy-6-methoxynaphthalene.



  The new dye is a violet-black powder that dissolves in water with violet, diluted sodium hydroxide solution with a brownish claret-red color and in concentrated sulfuric acid with a violet-red color. It dyes wool from an acid bath in uniform purple-brown tones, which are converted into an excellent mill-, potting- and lightfast olive green by subsequent chrome plating.

   The net dye is also excellently suited for dyeing by the single-bath chroming process, which also results in true olive-green colorations.



  The coupling is expediently carried out in an alkaline, e.g. B. alkali metal hydroxide and optionally alkali metal carbonate containing medium.



       Example: 23.4 parts of 4-nitro-2-amino-1-phenol-6-sulfonic acid are diazotized in a known manner and coupled with 18 parts of 2-oxy-6-methoxynaphthalene in an alkaline solution. The dye obtained is filtered off and dried.

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Herstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass man diazotierte 4-Nitro-2-amino-l-phenol-6- su: <B> PATENT CLAIM: </B> Process for the production of an azo dye, characterized in that diazotized 4-nitro-2-amino-1-phenol-6- see below: lfonsäure mit 2-Oxy-6-methoxynaphthalin kuppelt. Der neue Farbstoff stellt ein violett- schwarzes Pulver dar, das sich in Wasser mit violetter, in verdünnter Natronlauge mit braunstichig bordeauxroter und in konzen trierter Schwefelsäure mit violettro.ter Farbe löst. Lfonic acid couples with 2-oxy-6-methoxynaphthalene. The new dye is a violet-black powder that dissolves in water with a violet color, in dilute caustic soda with a brownish tinge of burgundy and in concentrated sulfuric acid with a violet-red color. Er färbt Wolle aus saurem Bade in gleichmässigen violettbraunen Tönen, die durch Nachchromieren in .ein ausgezeichnet walk-, potting- und lichtechtes 01ivegrün übergeführt werden. It dyes wool from an acid bath in uniform purple-brown tones, which are converted into an excellent mill-, potting- and lightfast oil-green by re-chrome plating. Der neue Farbstoff eignet sich auch vorzüglich zum Färben nach dem Einbadchromiervemfahren, wobei eben falls echte olivegrüne Färbungen erhalten werden. The new dye is also excellently suited for dyeing by the single bath chroming process, which also results in true olive-green colorations.
CH257111D 1943-11-04 1942-12-22 Process for the preparation of an azo dye. CH257111A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH257111T 1943-11-04

Publications (1)

Publication Number Publication Date
CH257111A true CH257111A (en) 1948-09-30

Family

ID=4472018

Family Applications (1)

Application Number Title Priority Date Filing Date
CH257111D CH257111A (en) 1943-11-04 1942-12-22 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH257111A (en)

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