CH171593A - 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
CH171593A
CH171593A CH171593DA CH171593A CH 171593 A CH171593 A CH 171593A CH 171593D A CH171593D A CH 171593DA CH 171593 A CH171593 A CH 171593A
Authority
CH
Switzerland
Prior art keywords
chromium
azo dye
containing azo
dye
preparation
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 CH171593A publication Critical patent/CH171593A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Zusatzpatent zum Hauptpatent Nr.<B>167803.</B>    Verfahren zur Herstellung eines chromhaltigen     Azofarbstoffes.       Es wurde gefunden, dass man einen  chromhaltigen     Azofarbstoff    herstellen kann,  wenn man den     Azofarbstoff    aus     6-Brom-1-          diazo-2-oxynaphthalin-4-sulfonsäure    und     2-          Oxynaphthalin    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  gezeichneten     Echtheiten.     



  <I>Beispiel:</I>  49,5 Teile des     Azofarbstoffes    aus     6--Brom-          1-diazo-2-oxynaphthalin-4-sulfonsäure    und     2-          Oxynaphthalin    werden in 1000 Teilen Was  ser in Gegenwart von 6     Vol.-Teilen    30 %     iger     Natronlauge gelöst. Man setzt     hieneuf    40,8  Teile     Natriumazetat,    sowie eine Chrom-         fluoridlösung,    enthaltend 4,5 Teile     Cr#.0z,     2 Teile     Fluorwasserstoffsäure    und 5 Teile  einer 85%igen Ameisensäure, hinzu und  kocht einige Zeit rückfliessend.

   Die erhaltene  blaue Lösung wird nach Klärfiltration ein  geengt und der chromhaltige Farbstoff durch  Beigabe von Kochsalz abgeschieden.  



  Zu demselben Farbstoffe gelangt man,  wenn statt     Chromfluorid    andere chrom  abgebende Mittel, wie zum Beispiel Chrom  azetat,     Chromformiat,        benzolsulfonsaures     Chrom oder     Gemische    solcher     Chromierungs-          mittel    verwendet werden.  



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



  Additional patent to main patent no. <B> 167803. </B> Process for the production of a chromium-containing azo dye. It has been found that a chromium-containing azo dye can be produced if the azo dye is made from 6-bromo-1-diazo-2-oxynaphthalene-4-sulfonic acid and 2-oxynaphthalene with a chromium donating agent in amounts such that the chromable group of the dye molecule corresponds to less than 1 atom of chromium, as well as in Ge,

            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.



  <I> Example: </I> 49.5 parts of the azo dye from 6 - bromo-1-diazo-2-oxynaphthalene-4-sulfonic acid and 2-oxynaphthalene are water in 1000 parts in the presence of 6 parts by volume 30% sodium hydroxide solution dissolved. 40.8 parts of sodium acetate and a chromium fluoride solution containing 4.5 parts of Cr # .0z, 2 parts of hydrofluoric acid and 5 parts of an 85% strength formic acid are then added and the mixture is refluxed for some time.

   The blue solution obtained is concentrated after clarification by filtration and the chromium-containing dye is separated off by adding sodium chloride.



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



  Likewise, the same dye is obtained if the sodium acetate used in the example 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 8-Brom-1 diazo-2-ogynaphthalin-44-sulfonsäure und 2- Ogynaphthalin 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. PATENT CLAIM: A process for the production of a chromium-containing azo dye, characterized in that the azo dye is made from 8-bromo-1-diazo-2-ogynaphthalene-44-sulfonic acid and 2-ogynaphthalene with a chromium-releasing agent in amounts such 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 löst sich mit blauer Farbe leicht in Wasser und färbt Wolle aus organischsaurem-schwe- felsaurem Bade in blauen Tönen von aus gezeichneten Echtheiten. 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.
CH171593D 1933-01-25 1933-01-25 Process for the preparation of a chromium-containing azo dye. CH171593A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH167803T 1933-01-25
CH171593T 1933-01-25

Publications (1)

Publication Number Publication Date
CH171593A true CH171593A (en) 1934-08-31

Family

ID=25718463

Family Applications (1)

Application Number Title Priority Date Filing Date
CH171593D CH171593A (en) 1933-01-25 1933-01-25 Process for the preparation of a chromium-containing azo dye.

Country Status (1)

Country Link
CH (1) CH171593A (en)

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