CH171592A - 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
CH171592A
CH171592A CH171592DA CH171592A CH 171592 A CH171592 A CH 171592A CH 171592D A CH171592D A CH 171592DA CH 171592 A CH171592 A CH 171592A
Authority
CH
Switzerland
Prior art keywords
chromium
azo dye
containing azo
preparation
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH171592A publication Critical patent/CH171592A/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

  

      Zusatzpatent    zum Hauptpatent Nr. 167803.    Verfahren zur Herstellung eines chromhaltigen     Azofarustoffes.       Es wurde gefunden, dass man einen       chromhaltigen        Azofarbstoff    herstellen kann,       wenn    man den     Azofarbstoff    aus     6-Brom-1-          (liazo-2-oxyna_phthalin-4-sulfonsäure    und     1-          Oxy        na.phthalin    mit einem chromabgebenden  Mittel in solchen Mengen,

   dass der     chromier-          baren    Gruppe des     Farbstoffmoleküls    weniger  als 1. Atom Chrom entspricht, sowie in Ge  genwart löslicher Salze organischer Säuren  behandelt.  



  Der erhaltene chromhaltige     Azofarbstoff     löst sich mit blauer Farbe leicht in Wasser  und färbt Wolle aus     organischsaurem-schwe-          felsaurem    Bade in blauen Tönen von     aus-          @,,ezeichneten        Echtheiten.     



       Beispiel:     49,5 Teile des     Azofarbstoffes    aus     6-Brom-          1        -diazo-2-oxynaphthalin-4-sulfonsäure    und 1  Oxyna,phthalin werden in 700 Teilen Was  ser und 5     Vol.-Teilen        30%iger    Natronlauge  gelöst. Man setzt hierauf eine etwa     3%i-,e          Lösini-    von     benzolsulfonsaurem    Chrom, ent-    haltend 5,5 Teile     Cr@03,    sowie 18 Teile     Na-          triumformiat    hinzu und kocht rückfliessend  sechs bis acht Stunden.

   Dann wird     filtri"jrt     und im Vakuum zur Trockne verdampft.  



  Zu demselben Farbstoffe gelangt man,  wenn     statt        benzolsulfonsaures    Chrom andere  chromabgebende Mittel,     wie    zum Beispiel       Chromfluorid,        Chromazetat,        Chromformiat     oder Gemische solcher     Chromierungsmittel     verwendet werden.  



  Ebenso wird der gleiche Farbstoff er  halten, wenn das im Beispiele     verwendete          Natriumformiat    ,durch andere lösliche Salze  organischer Säuren, wie zum Beispiel durch       Natriumazetat    oder durch     Natriumoxalat,    er  setzt wird.



      Additional patent to main patent no. 167803. Process for the production of a chromium-containing azo-fragrant substance. It has been found that a chromium-containing azo dye can be produced if the azo dye is prepared from 6-bromo-1- (liazo-2-oxyna_phthalin-4-sulfonic acid and 1-oxyna.phthalin with a chromium donating agent in such amounts

   that the chromable group of the dye molecule corresponds to less than the 1st atom of chromium, as well as treated in the presence of soluble salts of organic acids.



  The chromium-containing azo dye obtained dissolves easily in water with a blue color and dyes wool from organic acid-sulfuric acid bath in blue shades of excellent fastness properties.



       Example: 49.5 parts of the azo dye from 6-bromo-1-diazo-2-oxynaphthalene-4-sulfonic acid and 1 Oxyna, phthalene are dissolved in 700 parts of water and 5 parts by volume of 30% sodium hydroxide solution. About 3% of i-, e solution of benzenesulphonic acid chromium, containing 5.5 parts of Cr03 and 18 parts of sodium formate are then added and refluxed for six to eight hours.

   It is then filtered and evaporated to dryness in vacuo.



  The same colorant is obtained if other chromium-releasing agents, such as chromium fluoride, chromium acetate, chromium formate or mixtures of such chromating agents, are used instead of benzenesulfonic acid chromium.



  Likewise, the same dye is obtained if the sodium formate used in the examples is replaced by other soluble salts of organic acids, such as, for example, sodium acetate or sodium oxalate.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines chromhal- tigen Azofarbstoffes, :dadurch gekennzeichnet, dass man den Azofarbstoff aus 6-Brom-1- diazo-2-oxynaphthalin-4-sulfonsäure und 1- Oxynaphthalin mit einem chromabgebenden Mittel in solchen Mengen, dass der chromier- baren Gruppe des Farbstoffmoleküls weniger als 1 Atom Chrom entspricht, Claim: Process for the production of a chromium-containing azo dye, characterized in that the azo dye from 6-bromo-1-diazo-2-oxynaphthalene-4-sulfonic acid and 1-oxynaphthalene with a chromium-releasing agent in such amounts that the chromizing - less than 1 atom of chromium corresponds to the free group of the dye molecule, sowie in Ge genwart löslicher Salze organischer Säuren behandelt. Der erhaltene chromhaltige Azofarbstoff löst sich mit blauer Farbe leicht in Wasser und färbt Wolle aus organischsaurem-schwe- felsaurem Bade in blauen Tönen von aus gezeichneten Echtheiten. and treated in the presence of soluble salts of organic acids. The chromium-containing azo dye obtained dissolves easily in water with a blue color and dyes wool from organic acid-sulfuric acid bath in blue shades with excellent fastness properties.
CH171592D 1933-01-25 1933-01-25 Process for the preparation of a chromium-containing azo dye. CH171592A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH171592T 1933-01-25
CH167803T 1933-01-25

Publications (1)

Publication Number Publication Date
CH171592A true CH171592A (en) 1934-08-31

Family

ID=25718462

Family Applications (1)

Application Number Title Priority Date Filing Date
CH171592D CH171592A (en) 1933-01-25 1933-01-25 Process for the preparation of a chromium-containing azo dye.

Country Status (1)

Country Link
CH (1) CH171592A (en)

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