CH222995A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH222995A
CH222995A CH222995DA CH222995A CH 222995 A CH222995 A CH 222995A CH 222995D A CH222995D A CH 222995DA CH 222995 A CH222995 A CH 222995A
Authority
CH
Switzerland
Prior art keywords
mol
carboxylic acid
compound
azo dye
preparation
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH222995A publication Critical patent/CH222995A/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
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/38—Trisazo dyes ot the type
    • C09B35/40—Trisazo dyes ot the type the component K being a dihydroxy or polyhydroxy compound

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

      Terfaliren    zur Herstellung eines     Azofarbstoffes.       Gegenstand dieses Patentes ist ein. Ver  fahren zur Herstellung eines neuen     Azofarb-          stoffes,    welches darin besteht. dass man 1     ATol     1 .

       3-Dioxybenzol    einerseits mit 1     Mol    der     Di-          azoverbindung        aus        1-Amino-2-oxybenzol-3-          earbonsäure    und anderseits mit 1     Mol    der     Di-          azoazoverbindung,    die bei der einseitigen  Kupplung der     Tetrazoverbindung    aus 4.4'  Dia.minodiphenyl mit     1-Oxybenzol-2-carbon-          säure    entsteht, kuppelt.  



  <I>Beispiel:</I>  18,4 Gewichtsteile 4.     4'-Diaminodiplienyl     werden in 500 Raumteilen Wasser und 50  Raumteilen 10 n Salzsäure     angeschlämmt     und bei 10   C     tetrazotiert.    Die klare     Tetrazo-          lösung    fliesst bei 0 bis 5   zu einer     Lösung    von  15 Gewichtsteilen     1-Oxybenzol-2-carbonsäure     in 300 Raumteilen 2 n     Natriumearbonatlösung.     Sobald keine     Tetrazoverbindung    mehr nach  weisbar ist,

   wird die     abgeschiedene        Diazoazo-          verbindung    mit einer     sodaalkalischen    Lösung    von 27,4 Gewichtsteilen des durch Kuppeln  von     diazotierter        1-Amino-2-oxy        benzol-3-car-          bonsäure    mit     1.3-Dioxyberizol        erhaltenen          Monoazofarbstoffes    von der folgenden For  mel:  
EMI0001.0039     
    vereinigt. Nach beendeter Kupplung erwärmt  man auf 80   und trennt den vollkommen aus  geschiedenen     Trisazolarbstoff    ab.

   Er stellt  nach dem Trocknen ein dunkelbraunes Pulver  dar, das sich in Wasser mit brauner Farbe  löst. Der neue Farbstoff färbt Baumwolle     üi     braunen Tönen, deren     Echtheiten    durch  Nachbehandeln mit Kupfersulfat erheblich  verbessert werden.



      Terfaliren for the production of an azo dye. The subject of this patent is a. Process for the production of a new azo dye, which consists of it. that one ATol 1.

       3-Dioxybenzene on the one hand with 1 mole of the di-azo compound from 1-amino-2-oxybenzene-3-carboxylic acid and on the other hand with 1 mole of the di-azoazo compound, which in the one-sided coupling of the tetrazo compound from 4.4 'Dia.minodiphenyl with 1-oxybenzene -2-carboxylic acid is formed, couples.



  <I> Example: </I> 18.4 parts by weight of 4'-diaminodiplienyl are suspended in 500 parts by volume of water and 50 parts by volume of 10N hydrochloric acid and tetrazotized at 10 ° C. The clear tetrazo solution flows at 0 to 5 to a solution of 15 parts by weight of 1-oxybenzene-2-carboxylic acid in 300 parts by volume of 2N sodium carbonate solution. As soon as no more tetrazo compounds can be detected,

   the deposited diazoazo compound is mixed with a soda-alkaline solution of 27.4 parts by weight of the monoazo dye obtained by coupling diazotized 1-amino-2-oxybenzene-3-carboxylic acid with 1,3-dioxyberizole of the following formula:
EMI0001.0039
    united. After the coupling has ended, the mixture is heated to 80 and the trisazole material which has completely separated off is separated off.

   After drying, it is a dark brown powder that dissolves in water with a brown color. The new dye dyes cotton in brown shades, the fastness of which is significantly improved by aftertreatment with copper sulfate.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, welches dadurch gekennzeichnet ist, daB man 1 Mol 1 .3-Dioxybenzol einerseits mit 1 Mol der Diazoverbindung aus 1-Amino- 2-oxybenzol-3-carbonsäure und anderseits mit 1 Mol der Diazoazoverbindung, die bei der ein , PATENT CLAIM: A process for the production of an azo dye, which is characterized in that 1 mol of 1,3-dioxybenzene is mixed with 1 mol of the diazo compound from 1-amino-2-oxybenzene-3-carboxylic acid and with 1 mol of the diazoazo compound, the one seitigen Kupplung der Tetrazoverbindung aus 4.4'-Diaminodiphenyl mit 1-Oxylienzol- 2. carbonsäure entsteht, kuppelt. Der neue Farbstoff stellt in Form des Natriumsalzes ein dunkelbraunes Pulver dar, das sich in Wasser mit brauner Farbe löst. Er färbt Baumwolle in braunen Tönen, deren Echtheiten durch Nachbehandeln mit Kupfer sulfat verbessert werden. side coupling of the tetrazo compound formed from 4,4'-diaminodiphenyl with 1-oxylienzol- 2. carboxylic acid, couples. The new dye is a dark brown powder in the form of the sodium salt, which dissolves in water with a brown color. It dyes cotton in brown shades, the fastness of which is improved by aftertreatment with copper sulfate.
CH222995D 1940-05-15 1941-03-24 Process for the preparation of an azo dye. CH222995A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE222995X 1940-05-15
CH219654T 1941-03-24

Publications (1)

Publication Number Publication Date
CH222995A true CH222995A (en) 1942-08-15

Family

ID=25726316

Family Applications (1)

Application Number Title Priority Date Filing Date
CH222995D CH222995A (en) 1940-05-15 1941-03-24 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH222995A (en)

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