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CH222994A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH222994A
CH222994A CH222994DA CH222994A CH 222994 A CH222994 A CH 222994A CH 222994D A CH222994D A CH 222994DA CH 222994 A CH222994 A CH 222994A
Authority
CH
Switzerland
Prior art keywords
mol
compound
carboxylic acid
azo dye
hand
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 CH222994A publication Critical patent/CH222994A/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

  

  <B>Zusatzpatent</B> zum     Hauptpatent    Nr. 219654.    Verfahren zur Herstellung eines     Azofarbstoffes.            Gegenstand    dieses Patentes ist ein Ver  fahren zur Herstellung eines neuen     Azofarb-          stoffes,    welches     darin.    besteht, dass man 1     Mol          1.3-Diogybenzol    einerseits mit 1     Mol    der       Diazoverbindung    aus     1-Amino-2-ogybenzol-          3-carbonsäure-5-sulfonsäure    und anderseits  mit 1     Mol    der     Diazoazoverbindung,

      die bei  der einseitigen Kupplung der     Tetrazoverbin-          dung    aus     4.4'-Diamino-2-nitrodiphenyl        mit          1-Ogybenzol-2-carbonsäure    entsteht, kuppelt.

      <I>Beispiel:</I>    22,9     Gewichtsteile        4.4'-Diamino-2-nitro-          diphenyl    werden in 500 Raumteilen Wasser  und 50 Raumteilen 10 n Salzsäure aasge  schlämmt und bei 10   C     tetrazotiert.    Die       Tetrazolösung    fliesst bei 0 bis 5   C zu einer  Lösung von 15 Gewichtsteilen     1-Oxybenzol-          2-carbonsäure    in 300     Volumteilen    2 n     Na-          triumcarbonatlösung.    Sobald keine     Tetrazo-          verbindung    mehr nachweisbar ist,

   wird die  abgeschiedene     Diazoazoverbindung    mit     einer            sodaalkalischen    Lösung von 35,4 Gewichts  teilen des durch Kuppeln von     diazotierter          1-Amino-2-ogybenzol-3-carbonsäure-5-sulfon-          säure    mit 1.     3-Diogybenzol    erhaltenen     Mono-          azofarbstoffes    von der folgenden Formel:  
EMI0001.0041     
    vereinigt.  Nach beendeter     Kupplung        wird    der zum  Teil ausgeschiedene     Trisazofarbstoff    mit Na  triumchlorid vollständig ausgefällt und durch  Absaugen abgetrennt.

   Er stellt nach dem  Trocknen ein dunkelbraunes Pulver dar, das  sich in Wasser mit brauner Farbe löst. Der  neue Farbstoff färbt Baumwolle     in    gelbbrau  nen Tönen, deren     Echtheiten    durch Nach  behandeln mit Kupfersulfat verbessert wer  den.



  <B> Additional patent </B> to main patent no. 219654. Process for the production of an azo dye. The subject of this patent is a process for the production of a new azo dye which is contained therein. consists of 1 mole of 1,3-diogybenzene on the one hand with 1 mole of the diazo compound of 1-amino-2-ogybenzene-3-carboxylic acid-5-sulfonic acid and on the other hand with 1 mole of the diazoazo compound,

      which results from the one-sided coupling of the tetrazo compound from 4,4'-diamino-2-nitrodiphenyl with 1-ogybenzene-2-carboxylic acid, couples.

      <I> Example: </I> 22.9 parts by weight of 4,4'-diamino-2-nitro-diphenyl are slurried in 500 parts by volume of water and 50 parts by volume of 10N hydrochloric acid and tetrazotized at 10 ° C. The tetrazo solution flows at 0 to 5 ° C. to form 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 with a soda-alkaline solution of 35.4 parts by weight of the monoazo dye obtained by coupling diazotized 1-amino-2-ogybenzene-3-carboxylic acid-5-sulfonic acid with 1,3-diogybenzene of the following formula :
EMI0001.0041
    united. After the coupling has ended, the trisazo dye, which has partially separated out, is completely precipitated with sodium chloride and separated off by suction.

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

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man 1 Mol 1 . 3-Dioxybenzol einerseits mit 1 Mol der Diazoverbindung aus 1-Amino-2-oxyben- zol-3-carbonsäure-5-sulfonsäureundanderseits mit 1 Mol der Diazoazoverbindung, PATENT CLAIM: Process for the production of an azo dye, characterized in that 1 mol of 1. 3-Dioxybenzene on the one hand with 1 mol of the diazo compound from 1-amino-2-oxybenzene-3-carboxylic acid-5-sulfonic acid and on the other hand with 1 mol of the diazoazo compound, die bei der einseitigen Kupplung der Tetrazoverbin- dung aus 4.4'-Diamino-2-nitrodiphenyl mit 1-Oxybenzol-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 gelbbraunen Tönen, deren Echtheiten durch Nachbehandeln mit Kupfersulfat verbessert werden. which results from the one-sided coupling of the tetrazo compound from 4,4'-diamino-2-nitrodiphenyl with 1-oxybenzene-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 yellow-brown shades, the fastness of which is improved by aftertreatment with copper sulfate.
CH222994D 1940-05-15 1941-03-24 Process for the preparation of an azo dye. CH222994A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE222994X 1940-05-15
CH219654T 1941-03-24

Publications (1)

Publication Number Publication Date
CH222994A true CH222994A (en) 1942-08-15

Family

ID=25726315

Family Applications (1)

Application Number Title Priority Date Filing Date
CH222994D CH222994A (en) 1940-05-15 1941-03-24 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH222994A (en)

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