CH238149A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH238149A
CH238149A CH238149DA CH238149A CH 238149 A CH238149 A CH 238149A CH 238149D A CH238149D A CH 238149DA CH 238149 A CH238149 A CH 238149A
Authority
CH
Switzerland
Prior art keywords
azo dye
production
new azo
dye
blue
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba 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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH238149A publication Critical patent/CH238149A/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)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Description

  

  Verfahren zur Herstellung eines neuen     Azofarbstoffes.       Es wurde gefunden, dass man einen neuen       Azofarbstoff    erhält, wenn man die     Diazover-          bindung    der     2-Amino-l-oxy-6-nitrobenzol-4-          sulfonsäure    in     alkalischem    Medium mit     1,4-          Dioxynaphthalinmonoäthyläther    vereinigt.  



  Der     Farbstoff    stellt ein     dunkles    Pulver  dar, das sich in Wasser mit     blauvioletter     Farbe löst und     Wolle    aus saurem Bade in       violettblauen    Tönen färbt, die beim     Nach-          chromieren        in    Grün übergehen.  



       Beispiel:     23,4 Teile     2-Amino-l-oxy-6-nitrobenzol-4-          sulfonsäure    werden mit 6,9 Teilen     Natrium-          nitrit        und        22        Teilen        Salzsäure        (30        %)        diazotiert.     Die     Diazoverbindung    lässt man bei     0-5     in  eine Lösung von 18,8 Teilen     1,4-Dioxy-          naphthalinmonoäthyläther,

      15 Teilen     Natron-          lauge        (30        %)        und        25        Teilen        Natriumcarbonat            in    100 Teilen Wasser fliessen. Die     Kupplung     ist nach, vierstündigem Rühren bei     10-15o     beendet. Der     Farbstoff    wird     abfiltriert    und       getrocknet.  



  Process for the production of a new azo dye. It has been found that a new azo dye is obtained if the diazo compound of 2-amino-1-oxy-6-nitrobenzene-4-sulfonic acid is combined with 1,4-dioxynaphthalene monoethyl ether in an alkaline medium.



  The dye is a dark powder that dissolves in water with a blue-violet color and dyes wool from an acid bath in violet-blue tones, which turn green when chromed.



       Example: 23.4 parts of 2-amino-1-oxy-6-nitrobenzene-4-sulfonic acid are diazotized with 6.9 parts of sodium nitrite and 22 parts of hydrochloric acid (30%). The diazo compound is left at 0-5 in a solution of 18.8 parts of 1,4-dioxynaphthalene monoethyl ether,

      15 parts of sodium hydroxide solution (30%) and 25 parts of sodium carbonate flow in 100 parts of water. The coupling is complete after stirring for four hours at 10-15 °. The dye is filtered off and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung der 2-Amino-l-oxy-6- nitrobenzol-4-sulfonsäure in alkalischem Me dium mit 1,4-Dioxynaphthalinmonoäthyläther vereinigt. Der Farbstoff stellt ein dunkles Pulver dar, das sich in Wasser mit blauvioletter Farbe löst und Wolle aus saurem Bade in violettblauen Tönen färbt, die beim Nach- chromieren in Grün übergehen. Claim: Process for the preparation of a new azo dye, characterized in that the diazo compound of 2-amino-1-oxy-6-nitrobenzene-4-sulfonic acid is combined with 1,4-dioxynaphthalene monoethyl ether in alkaline medium. The dye is a dark powder that dissolves in water with a blue-violet color and dyes wool from an acid bath in violet-blue tones, which turn green when chromed.
CH238149D 1944-01-12 1944-01-12 Process for the production of a new azo dye. CH238149A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH238149T 1944-01-12

Publications (1)

Publication Number Publication Date
CH238149A true CH238149A (en) 1945-06-30

Family

ID=4460436

Family Applications (1)

Application Number Title Priority Date Filing Date
CH238149D CH238149A (en) 1944-01-12 1944-01-12 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH238149A (en)

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