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CH263528A - Process for the preparation of a chromium-containing azo dye. - Google Patents

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

Info

Publication number
CH263528A
CH263528A CH263528DA CH263528A CH 263528 A CH263528 A CH 263528A CH 263528D A CH263528D A CH 263528DA CH 263528 A CH263528 A CH 263528A
Authority
CH
Switzerland
Prior art keywords
chromium
dye
azo dye
containing azo
preparation
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 CH263528A publication Critical patent/CH263528A/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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Herstellung eines chromhaltigen     Azofarbstoffes.       Es wurde     gefunden,    dass ein wertvoller  chromhaltiger     Azofarbstoff    hergestellt werden  kann, wenn man den aus     diazotierter        2-Amino-          6-nitro-l-phenol-4-sulfonsäure    und     2-Methyl-          amino    - 6 -     methoxy    -     naphthalin    erhältlichen  Farbstoff mit. chromabgebenden Mitteln be  handelt.  



  Der neue chromhaltige Farbstoff ist ein  grünschwarzes Pulver, das sich in Wasser  und verdünnter     Sodalösung    mit grüner Farbe  löst und Wolle aus schwefelsaurem Bade in  gleichmässigen     gelbstichig    grünen Tönen färbt.  



  Der dein vorliegenden Verfahren als Aus  gangsstoff dienende Farbstoff kann aus den  angegebenen Komponenten in bekannter  Weise, z. B. durch Kupplung in saurem Me  dium, erhalten werden. Als chromabgebende  Mittel wählt man zweckmässig solche, die das  Chrom in dreiwertiger Form enthalten und  daher keine schädliche Oxydationswirkung  besitzen, insbesondere     Chrom-(III)-Salze.    Die  Umsetzung kann in an sich bekannter Weise  in saurem, neutralem oder alkalischem Me  dium, mit oder ohne Zusätze z. B. von Neu  tralsalzen, gegebenenfalls komplexbildender  Art, organischen Lösungsmitteln, wie Alko  hol oder     Pyridin,    offen oder unter Druck  durchgeführt werden.  



  <I>Beispiel:</I>  23,4 Teile     6-Nitro-2-amino-l-phenol-4-sul-          fonsäure    werden in bekannter Weise diazo-         tiert    und mit 19,5 Teilen     2-1llethylamino-6-          metho.Yynaphthalin    bei Gegenwart von Essig  säure oder Alkohol gekuppelt. Der     abfiltrierte     Farbstoff wird in 1800 Teilen Wasser bei  Siedehitze gelöst und mit einer     Chromfor-          miatlösung    versetzt, die eine 8,4 Teilen  Chromoxyd entsprechende Menge Chrom ent  hält. Man erhitzt unter     Rückflusskühlttng    län  gere Zeit zum Sieden und filtriert die erhal  tene, in Wasser schwer lösliche Chromverbin  dung ab.

   Sie wird durch Lösen in verdünn  ter Natronlauge in eine leicht lösliche Form  übergeführt und getrocknet.



  Process for the preparation of a chromium-containing azo dye. It has been found that a valuable chromium-containing azo dye can be produced if the dye obtainable from diazotized 2-amino-6-nitro-1-phenol-4-sulfonic acid and 2-methylamino-6-methoxy-naphthalene is used. chromium-releasing agents.



  The new chromium-containing dye is a greenish-black powder that dissolves in water and dilute soda solution with a green color and dyes wool from a sulfuric acid bath in uniform yellowish green tones.



  The present process as starting material from serving dye can be prepared from the specified components in a known manner, for. B. medium by coupling in acidic Me obtained. As chromium-releasing agents, it is expedient to choose those which contain chromium in trivalent form and therefore have no harmful oxidizing effect, in particular chromium (III) salts. The reaction can be carried out in a manner known per se in acidic, neutral or alkaline Me, with or without additives such. B. of neutralsalts, optionally complex-forming type, organic solvents such as alcohol or pyridine, can be carried out openly or under pressure.



  <I> Example: </I> 23.4 parts of 6-nitro-2-amino-l-phenol-4-sulphonic acid are diazotized in a known manner and 19.5 parts of 2-1llethylamino-6-metho .Yynaphthalene coupled in the presence of acetic acid or alcohol. The filtered dye is dissolved in 1800 parts of water at the boiling point and a chromium formate solution is added which contains an amount of chromium corresponding to 8.4 parts of chromium oxide. The mixture is refluxed for a longer time and the chromium compound obtained, which is sparingly soluble in water, is filtered off.

   It is converted into an easily soluble form by dissolving it in dilute sodium hydroxide solution and drying.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines chrom haltigen Azofarbstoffes, dadurch gekennzeich net, dass man den aus diazotierter 2-Amino- 6-nitro-l-phenol-4-sulfonsäure und 2-Methyl- amino - 6 - methoxy - naphthalin erhältlichen Farbstoff mit chromabgebenden Mitteln be- h andelt. Der neue chromhaltige Farbstoff ist ein grünschwarzes Pulver, PATENT CLAIM: Process for the production of a chromium-containing azo dye, characterized in that the dye obtainable from diazotized 2-amino-6-nitro-1-phenol-4-sulfonic acid and 2-methylamino-6-methoxy-naphthalene is chromium-releasing Funds dealt with. The new chromium-containing dye is a green-black powder, das sich in Wasser und verdünnter Sodalösung mit grüner Farbe löst und Wolle aus schwefelsaurem Bade in gleichmässigen gelbstichig grünen Tönen, färbt. UNTERANSPRUCH: Verfahren gemäss Patentanspruch, ge kennzeichnet durch die Wahl von Chrom- (III)-Salzen als chromabgebende Mittel. which dissolves in water and dilute soda solution with a green color and dyes wool from sulfuric acid bath in uniform yellowish green tones. SUBCLAIM: Process according to claim, characterized by the choice of chromium (III) salts as chromium-releasing agents.
CH263528D 1943-12-02 1943-12-02 Process for the preparation of a chromium-containing azo dye. CH263528A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH263528T 1943-12-02
CH258297T 1948-11-30

Publications (1)

Publication Number Publication Date
CH263528A true CH263528A (en) 1949-08-31

Family

ID=25730165

Family Applications (1)

Application Number Title Priority Date Filing Date
CH263528D CH263528A (en) 1943-12-02 1943-12-02 Process for the preparation of a chromium-containing azo dye.

Country Status (1)

Country Link
CH (1) CH263528A (en)

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