CH238518A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH238518A
CH238518A CH238518DA CH238518A CH 238518 A CH238518 A CH 238518A CH 238518D A CH238518D A CH 238518DA CH 238518 A CH238518 A CH 238518A
Authority
CH
Switzerland
Prior art keywords
production
azo dye
new azo
carboxylic acid
new
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 CH238518A publication Critical patent/CH238518A/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

Description

  

  Verfahren zur Herstellung eines neuen     Azofarbstofes.       Es     wurde    gefunden, dass man einen neuen  A     zofarbstoff    erhält, wenn man     diazotiertes          1-Aminobenzol    -2-     carbonsäure-4-sulfo-(2'-car-          bonsäure)-anilid    mit     Barbitursäure    kuppelt.  



  Der neue Farbstoff bildet ein gelbes Pul  ver, das Wolle aus saurem Bade     grünstichig     gelb färbt.     Durch        Nachchromieren    erhält man  ein farbstarkes     grünstichiges    Gelb mit guten       Echtheiten.     



       Beispiel:     Man löst 33,6 Teile     1-Aminobenzol-2-car-          bonsäure-4-sulfo-(2'-carbonsäure)-anilid    in  28 Teilen     30%iger        Natriumhydroxydlösung     und 150 Teilen Wasser und gibt 7 Teile Na  triumnitrit zu. Diese Lösung giesst man bei  0-5  in eine Mischung von 52 Teilen 30     %        iger     Salzsäure und Eis. Nach einer     Stunde    ist die       Diazotierung    beendet.

   Man giesst den Diazo-         brei    in eine     mit    Eis auf 5-8  gekühlte Lö  sung von 12,8 Teilen     Barbitursäure    und  40 Teilen     Natriumcarbonat    in 300 Teilen  Wasser. Nach vollständiger     Kupplung    wird  der Farbstoff     ausgesalzen,    filtriert und ge  trocknet.



  Process for the preparation of a new azo dye. It has been found that a new azo dye is obtained when diazotized 1-aminobenzene -2-carboxylic acid-4-sulfo- (2'-carboxylic acid) anilide is coupled with barbituric acid.



  The new dye forms a yellow powder that dyes wool from an acidic bath with a greenish yellow. Chromium-plating gives a strong greenish yellow with good fastness properties.



       Example: 33.6 parts of 1-aminobenzene-2-carboxylic acid-4-sulfo- (2'-carboxylic acid) anilide are dissolved in 28 parts of 30% strength sodium hydroxide solution and 150 parts of water and 7 parts of sodium nitrite are added. This solution is poured at 0-5 into a mixture of 52 parts of 30% strength hydrochloric acid and ice. The diazotization is over after one hour.

   The diazo slurry is poured into a solution, cooled to 5-8 with ice, of 12.8 parts of barbituric acid and 40 parts of sodium carbonate in 300 parts of water. After the coupling is complete, the dye is salted out, filtered and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man diazotiertes 1-Aminobenzol- 2 - carbon- säure-4-sulfo-(2'-carbonsäure)-anilid mit Bar- bitursäurekuppelt. Der neue Farbstoff bildet ein gelbes Pul ver, das Wolle aus saurem Bade grünstichig gelb färbt. PATENT CLAIM: Process for the production of a new azo dye, characterized in that diazotized 1-aminobenzene-2-carboxylic acid-4-sulfo- (2'-carboxylic acid) anilide is coupled with barbituric acid. The new dye forms a yellow powder that dyes wool from an acidic bath with a greenish yellow. Durch Nachchromieren erhält man ein farbstarkes grünstichiges Gelb mit guten Echtheiten. Chromium-plating gives a strong greenish yellow with good fastness properties.
CH238518D 1944-02-23 1944-02-23 Process for the production of a new azo dye. CH238518A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH238518T 1944-02-23

Publications (1)

Publication Number Publication Date
CH238518A true CH238518A (en) 1945-07-31

Family

ID=4460659

Family Applications (1)

Application Number Title Priority Date Filing Date
CH238518D CH238518A (en) 1944-02-23 1944-02-23 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH238518A (en)

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