CH183590A - 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
CH183590A
CH183590A CH183590DA CH183590A CH 183590 A CH183590 A CH 183590A CH 183590D A CH183590D A CH 183590DA CH 183590 A CH183590 A CH 183590A
Authority
CH
Switzerland
Prior art keywords
chromium
azo dye
blue
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 CH183590A publication Critical patent/CH183590A/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

  

  <B>Zusatzpatent</B> zum     Hauptpatent    Nr. 180407.    Verfahren zur Herstellung eines     chromhaltigen        Azofarbstoffes.       Es wurde gefunden, dass man einen     chrom-          haltigen        Azofarbstoff    herstellen kann, wenn  man auf den     Azofarbstoff    der Formel  
EMI0001.0008     
    chromabgebende Mittel einwirken     lässt.     



  Der chromhaltige Farbstoff stellt ein  schwarzes Pulver dar, das sich in Wasser  mit blauvioletter, in 10      %iger    Natronlauge  und in 10     %iger        Sodalösung    mit blaustichig  roter und in konzentrierter Schwefelsäure  mit blauschwarzer Farbe löst. Er färbt Wolle  aus saurem Bade in echten blauen Tönen.  <I>Beispiel:</I>  158 Teile     2-Oxynaphthalin    werden in  überschüssiger Natronlauge gelöst und mit  einer wässerigen Paste von 250 Teilen diazo-         tierter        2-Amijio-l-oxynaphthalin-7-sulfonsäure     versetzt. Man rührt bei 15-20  , bis die       Diazoverbindung    verschwunden ist und schei  det den Farbstoff durch Ansäuern ab.  



  42,7 Teile des erhaltenen Farbstoffes  werden in 800 Teilen Wasser gelöst und  mit 120     Volumteilen    einer basischen Chrom  sulfatlösung, enthaltend 9,1 Teile     Cr20s,     24 Stunden rückfliessend erhitzt. Hierauf ver  dampft man die Lösung im Vakuum zur  Trockne.



  <B> Additional patent </B> to main patent no. 180407. Process for the production of a chromium-containing azo dye. It has been found that a chromium-containing azo dye can be produced by relying on the azo dye of the formula
EMI0001.0008
    lets chromium-releasing agents act.



  The chromium-containing dye is a black powder that dissolves in water with a blue-violet, in 10% sodium hydroxide solution and in 10% soda solution with a bluish red and in concentrated sulfuric acid with a blue-black color. He dyes wool from an acid bath in real blue tones. <I> Example: </I> 158 parts of 2-oxynaphthalene are dissolved in excess sodium hydroxide solution and an aqueous paste of 250 parts of diazoated 2-amijio-1-oxynaphthalene-7-sulfonic acid is added. The mixture is stirred at 15-20 until the diazo compound has disappeared and the dye is separated off by acidification.



  42.7 parts of the dye obtained are dissolved in 800 parts of water and refluxed for 24 hours with 120 parts by volume of a basic chromium sulfate solution containing 9.1 parts of Cr20s. The solution is then evaporated to dryness in vacuo.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines chrom- haltigen Azofarbstoffes, dadurch gekennzeich net, dass man auf den Azofarbstoff der Formel EMI0001.0023 chromabLyebende Mittel einwirken lässt. Der chromhaltige Farbstoff stellt ein schwarzes Pulver dar, das sich in Wasser mit blauvioletter, in 10 %iger Natronlauge und in 10 o/oiger Sodalösung mit blaustichig roter und in konzentrierter Schwefelsäure mit blauschwarzer Farbe löst. Er färbt Wolle aus saurem Bade in echten blauen Tönen. PATENT CLAIM: Process for the production of a chromium-containing azo dye, characterized in that the azo dye of the formula EMI0001.0023 Lets chroma-destroying agents act. The chromium-containing dye is a black powder that dissolves in water with a blue-violet, in 10% sodium hydroxide solution and in 10% sodium hydroxide solution with a bluish red and in concentrated sulfuric acid with a blue-black color. He dyes wool from an acid bath in real blue tones.
CH183590D 1934-12-18 1934-12-18 Process for the preparation of a chromium-containing azo dye. CH183590A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH183590T 1934-12-18
CH180407T 1934-12-18

Publications (1)

Publication Number Publication Date
CH183590A true CH183590A (en) 1936-04-15

Family

ID=25720408

Family Applications (1)

Application Number Title Priority Date Filing Date
CH183590D CH183590A (en) 1934-12-18 1934-12-18 Process for the preparation of a chromium-containing azo dye.

Country Status (1)

Country Link
CH (1) CH183590A (en)

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