CH246183A - Process for the preparation of a chromable azo dye. - Google Patents

Process for the preparation of a chromable azo dye.

Info

Publication number
CH246183A
CH246183A CH246183DA CH246183A CH 246183 A CH246183 A CH 246183A CH 246183D A CH246183D A CH 246183DA CH 246183 A CH246183 A CH 246183A
Authority
CH
Switzerland
Prior art keywords
dye
azo dye
preparation
sulfonic acid
parts
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R 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 Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH246183A publication Critical patent/CH246183A/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)
  • Paper (AREA)
  • Coloring (AREA)
  • Optical Filters (AREA)

Description

  

  Verfahren zur     Herstellung        eines        ehromierbaren        Azofarbstoffes.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Herstellung eines     chromier-          baren        Azofarbstoffes.    Das Verfahren ist da  durch gekennzeichnet,

   dass     diazotierte        1-          Amino-2-oxy-naphthalin-4-sulfonsäure        mit        1-          Oxy-naphthalin-    4     -methylketon-8-sulf        onsäure     in alkalischem Medium vereinigt     wird.    Der  neue Farbstoff stellt in     ehromiertem    Zustand  ein dunkelblaues Pulver dar, das Wolle aus  stark schwefelsaurem Bade in sehr gleich  mässigen, klaren bläuen     Tönen    färbt.

      <I>Beispiel:</I>  25 Teile der     Diazoverbindung    aus     1-          Amino-2-oxy-naphthalin-4-sulfonsäure    wer  den in eine     Anschlämmung    von 32 Teilen       Kaliumsalz    der     1-Oxy-naphthalin-4-methyl-          keton-8-sulfo#nsäure    in 120 Teilen Wasser  gegeben.     Dann    werden noch 20 Teile Kali  lauge, entsprechend 5,6 Teilen     KOH    und 12  Teile     Pyridin    zugegeben.

   Man rührt bei       Zimmertemperatur,        erwärmt    das Ganze nach  beendeter Kupplung auf 70 , neutralisiert  mit Mineralsäure und     gibt    Kochsalz zu, bis  der Farbstoff vollständig ausgefallen ist.    Die     Chromkomplexverbindung    des Farb  stoffes kann gewonnen werden, indem man  den erhaltenen kristallinen Farbstoff in 1000  Teilen heissem Wasser löst, eine Lösung von  Chromsulfat,     entsprechend    9,1 Teilen Chrom  oxyd dazugibt, 20     Stunden    unter     Rückfluss     kocht und dann erkalten lässt. Der Farbstoff  chromkomplex fällt dabei in     bronzierenden          griställchen    aus.

   Durch Zugabe von Koch  salz     wird    die     Farbstoffausscheidung    vervoll  ständigt, dann     filtriert    und getrocknet.



  Process for the production of an honorable azo dye. The subject of the present patent is a process for the production of a chromable azo dye. The procedure is characterized by

   that diazotized 1-amino-2-oxy-naphthalene-4-sulfonic acid is combined with 1-oxy-naphthalene-4-methylketone-8-sulfonic acid in an alkaline medium. In an honored state, the new dye is a dark blue powder that dyes wool from a strong sulfuric acid bath in very even, clear blue tones.

      <I> Example: </I> 25 parts of the diazo compound from 1-amino-2-oxy-naphthalene-4-sulfonic acid are added to a slurry of 32 parts of the potassium salt of 1-oxy-naphthalene-4-methyl-ketone-8 -sulfonic acid given in 120 parts of water. Then 20 parts of potassium hydroxide solution, corresponding to 5.6 parts of KOH and 12 parts of pyridine, are added.

   The mixture is stirred at room temperature, heated to 70 after the coupling, neutralized with mineral acid and common salt is added until the dye has completely precipitated. The chromium complex compound of the dye can be obtained by dissolving the resulting crystalline dye in 1000 parts of hot water, adding a solution of chromium sulfate corresponding to 9.1 parts of chromium oxide, refluxing for 20 hours and then allowing it to cool. The chromium complex dye precipitates in bronzing granules.

   The dye excretion is completed by adding sodium chloride, then filtered and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines ehromier- baren Azofarbstoffes, dadurch gekennzeich net, dass diazotierte 1-Amino-2-oxy-naphtha- lin-4-sulfonsäure mit 1-Oxy-naphthaIin-4- methylketon-8-sulfonsäure in alkalischem Medium vereinigt wird. Der neue Farbstoff stellt in chromiertem Zustand ein dunkel blaues Pulver dar, das Wolle aus stark schwefelsaurem Bade in sehr gleichmässigen, klaren blauen Tönen färbt. PATENT CLAIM: Process for the production of an honorable azo dye, characterized in that diazotized 1-amino-2-oxynaphthalene-4-sulfonic acid is combined with 1-oxynaphthalene-4-methylketone-8-sulfonic acid in an alkaline medium becomes. When chrome-plated, the new dye is a dark blue powder that dyes wool from a strong sulfuric acid bath in very even, clear blue tones.
CH246183D 1944-09-20 1944-09-20 Process for the preparation of a chromable azo dye. CH246183A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH246183T 1944-09-20
CH242843T 1944-09-20

Publications (1)

Publication Number Publication Date
CH246183A true CH246183A (en) 1946-12-15

Family

ID=25728756

Family Applications (1)

Application Number Title Priority Date Filing Date
CH246183D CH246183A (en) 1944-09-20 1944-09-20 Process for the preparation of a chromable azo dye.

Country Status (1)

Country Link
CH (1) CH246183A (en)

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