CH171594A - 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
CH171594A
CH171594A CH171594DA CH171594A CH 171594 A CH171594 A CH 171594A CH 171594D A CH171594D A CH 171594DA CH 171594 A CH171594 A CH 171594A
Authority
CH
Switzerland
Prior art keywords
chromium
azo dye
black
dye
containing azo
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 CH171594A publication Critical patent/CH171594A/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
    • C09B45/14—Monoazo compounds
    • C09B45/16—Monoazo compounds containing chromium

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

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 167803.    herfahren zur Herstellung eines     ehromhaltigen        Azofarbstoffes.       Es wurde gefunden, dass man einen     chrom-          haltigen        Azofarbstoff    herstellen kann, wenn  man den     Azofarbstoff    aus nitrierter     1-Diazo-          2-oxynaphthalin-4-sulfonsäure    und     1-Oxynaph-          thalin    mit einem chromabgebenden Mittel  in solchen Mengen,

   dass der     chromierbaren     Gruppe des     Farbstoffmoleküls    weniger als  1 Atom Chrom entspricht, sowie in Gegen  wart löslicher Salze organischer Säuren be  handelt.  



  Der erhaltene chromhaltige     Azofarbstoff     stellt ein schwarzes Pulver dar, das sich in  Wasser mit     violettschwarzer,    in 10     o/oiger          Sodalösung    und in 10     o/oiger    Natronlauge  mit     braunviolettschwarzer    Farbe löst. In kon  zentrierter Schwefelsäure ist der     Farbstoff     mit grünschwarzer Farbe löslich. Er färbt  Wolle und Seide aus     organischsaurem-schwe-          felsaurem    Bade in schwarzen Tönen von  guten     Echtheiten.     



       Beispiel:     46,1 Teile des     Azofarbstoffes    aus nitrier  ter     1-Diazo-2-oxynaphthalin-4-sulfonsäure    und         1-Oxynaphtbalin    werden unter Zusatz von 5       Vol.-Teilen    30     o/oiger    Natronlauge in 1000  Teilen Wasser gelöst. hierauf wird eine  Lösung von     Chromfornniat,    enthaltend 5,3  Teile     Cr203,    sowie 20 Teile     Natriumformiat     zugegeben und 6-8 Stunden unter Rück  flusskühlung gekocht.

   Die erhaltene violett  schwarze Lösung der entstandenen Chrom  verbindung wird, gegebenenfalls nach dem       Abfiltrieren    geringer Mengen Verunreinigun  gen, im Vakuum zur Trockne verdampft.  



  Zu demselben Farbstoffe gelangt man,  wenn statt     Chromformiat    andere chromab  gebende Mittel, wie z. B.     Cbromfluorid,    Chrom  acetat,     benzolsulfonsaures    Chrom oder Ge  mische solcher     Chromierungsmittel    verwen  det werden.  



  Ebenso wird der gleiche Farbstoff erhal  ten, wenn das im Beispiele verwendete     Na-          triumformiat    durch andere lösliche Salze  organischer Säuren, wie z. B. durch Natrium  acetat oder durch     Natriumoxalat    ersetzt wird.



      Additional patent to the main patent no. 167803. for the production of an azo dye containing Ehrom. It has been found that a chromium-containing azo dye can be produced if the azo dye is prepared from nitrated 1-diazo-2-oxynaphthalene-4-sulfonic acid and 1-oxynaphthalene with a chromium-releasing agent in such amounts

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



  The chromium-containing azo dye obtained is a black powder which dissolves in water with violet-black, in 10% sodium hydroxide solution and in 10% sodium hydroxide solution with a brown-violet-black color. The dye is soluble in concentrated sulfuric acid with a greenish-black color. It dyes wool and silk from organic acid-sulfuric acid bath in black shades with good fastness properties.



       Example: 46.1 parts of the azo dye from nitrated 1-diazo-2-oxynaphthalene-4-sulfonic acid and 1-oxynaphthalene are dissolved in 1000 parts of water with the addition of 5 parts by volume of 30% sodium hydroxide solution. a solution of chromium formate containing 5.3 parts of Cr 2 O 3 and 20 parts of sodium formate is then added and the mixture is refluxed for 6-8 hours.

   The resulting violet-black solution of the resulting chromium compound is evaporated to dryness in vacuo, if necessary after filtering off small amounts of impurities.



  The same dyes are obtained if, instead of chromium formate, other chromabending agents such. B. Cbromfluorid, chromium acetate, benzenesulfonic acid chromium or Ge mixtures of such chromating agents are used.



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

Claims (1)

PATENTANTSI'RUCI Verfahren zur Herstellung eines chrom- haltigen Azofarbstoffes, dadurch gekenn zeichnet, dass man den Azofarbstoff aus nitrierter 1-Diazo-2-ogynaphthalin-4-sulfon- säure und l-O,:#yiiaphthalin mit einem chrom abgebenden 'Mittel in solchen Mengen, dass der chromierbaren Gruppe des Farbstoffmo- leküls weniger -als 1 Atom Chrom entspricht, sowie in Gegenwart löslicher Salze organi scher Säuren behandelt. PATENTANTSI'RUCI Process for the production of a chromium-containing azo dye, characterized in that the azo dye from nitrated 1-diazo-2-ogynaphthalene-4-sulfonic acid and 10: # yiiaphthalene with a chromium-releasing agent in such amounts that the chromable group of the dye molecule corresponds to less than 1 atom of chromium, and treated in the presence of soluble salts of organic acids. Der erhaltene chromhaltige Azofarbstoff stellt ein schwarzes Pulver dar, das sich in Wasser mit violettschwarzer, in 10 o/oiger Sodalösung und in 10 o/oiger Natroulauge mit braunviolettschwarzer Farbe löst. In kon zentrierter Schwefelsäure ist der Farbstoff finit grünschwarzer Farbe löslich. Er färbt Wolle und Seide aus organischsaurem-schwe- felsaurem Bade in schwarzen Tönen von guten Echtheiten. The chromium-containing azo dye obtained is a black powder which dissolves in water with violet-black, in 10% sodium carbonate solution and in 10% sodium hydroxide solution with a brown-violet-black color. In concentrated sulfuric acid, the dye is finely soluble in green-black color. It dyes wool and silk from organic acid-sulfuric acid bath in black shades with good fastness properties.
CH171594D 1933-01-25 1933-01-25 Process for the preparation of a chromium-containing azo dye. CH171594A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH167803T 1933-01-25
CH171594T 1933-01-25

Publications (1)

Publication Number Publication Date
CH171594A true CH171594A (en) 1934-08-31

Family

ID=25718464

Family Applications (1)

Application Number Title Priority Date Filing Date
CH171594D CH171594A (en) 1933-01-25 1933-01-25 Process for the preparation of a chromium-containing azo dye.

Country Status (1)

Country Link
CH (1) CH171594A (en)

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