CH235451A - Process for the preparation of a trisazo dye. - Google Patents

Process for the preparation of a trisazo dye.

Info

Publication number
CH235451A
CH235451A CH235451DA CH235451A CH 235451 A CH235451 A CH 235451A CH 235451D A CH235451D A CH 235451DA CH 235451 A CH235451 A CH 235451A
Authority
CH
Switzerland
Prior art keywords
combined
dye
amino
preparation
sulfonic acid
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 CH235451A publication Critical patent/CH235451A/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
    • C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
    • C09B31/16—Trisazo dyes
    • C09B31/20—Trisazo dyes from a coupling component"D" containing a directive hydroxyl group

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Herstellung eines     Trisazofarbstoffes.            Vorliegendes    Patent bezieht sich auf ein  Verfahren zur Herstellung     eines        Trisazo-          farbstoffes.,        -dadurch    gekennzeichnet,     dass    man       1-Diazo-4-oxybenzol-3-,carbonsäure    in saurem  Medium     mit        1-Amino-naphthalin-7-sulfon-          säure        vereinigt,,

  den    so     erhaltenen        Aminoazo-          farbstoff        diazotiert,    die     Diazoverbindung    in  saurem     Medium        mit        1-Amino-2.5-.dimethoxy-          benzol    vereinigt,

       wieder        Jiazotiert    und die       Diazoverbindun.g    des so erhaltenen     Amino-          disazofarbstoffes        in.        alkalischem    Medium mit       2-Nap.hthol-6-sulfonsäure        vereinigt.     



  Der so erhaltene     Trisazufarbstoff    ist ein  dunkles Pulver,     ,das    sich     in        Wasser    mit       dunkelvioletter,    in     Schwefelsäure    mit     dunkel-          grüner    Farbe     -löst,    und färbt     Baumwolle    in       grünstickig    .graublauen, lichtechten Tönen.

    Die     Fäxbungen    werden     idurch    Nachbehandeln       mit        Chromi-    oder     Kupfersalzen    etwas röter  und sehr waschecht.  



  <I>Beispiel:</I>  Die aus 15,3 Teilen     1-Amino-4-oxybenzol-          3-carbonsäure        hergestellte        Diazoverbindung            wird    in     Gegenwart    von     überschüssigem        Na-          triumacetat    mit     einer        Lösung        des        Natrium-          sialzes    von 22,

  3     Teilen        1-Amino-naphthalin-          7    -     sulfonsäure        vereinigt.    Nach     beendeter     Kupplung     wird        ,der    Farbstoff     weiterdiazotiert     und die     Diazoverbindung    in     essigsaurer    Lö  sung mit 15 Teilen     1-Amino-2.5-@dimethoxy-          @benzol        vereinigt.    Der     Farbstoff        wind    abge  schieden und :

  durch Anrühren mit Eis und  Salzsäure und Zugabe einer Lösung von     Na-          triumnitrit        weiterdiazotiert.     



  Die     Diazosuspension    vereinigt man bei       0-5     mit     einer        isadaalka.lis:chen        Lösung    von  22,4 Teilen     2-Naphthol-6-sulfonsäure,    wobei  ein Zusatz von     Pyridin        vorteilhaft    ist.



  Process for the preparation of a trisazo dye. The present patent relates to a process for the preparation of a trisazo dye., Characterized in that 1-diazo-4-oxybenzene-3-carboxylic acid is combined with 1-amino-naphthalene-7-sulfonic acid in an acidic medium, ,

  the aminoazo dye thus obtained is diazotized, the diazo compound is combined with 1-amino-2,5-dimethoxybenzene in an acidic medium,

       Jiazotized again and the diazo compound of the amino disazo dye thus obtained is combined with 2-napthol-6-sulfonic acid in an alkaline medium.



  The trisazu dye obtained in this way is a dark powder, which dissolves in water with a dark purple color, in sulfuric acid with a dark green color, and dyes cotton in greenish-gray-blue, lightfast shades.

    The stains become a little redder and very washable after treatment with chromium or copper salts.



  <I> Example: </I> The diazo compound produced from 15.3 parts of 1-amino-4-oxybenzene-3-carboxylic acid is mixed with a solution of the sodium salt of 22 in the presence of excess sodium acetate.

  3 parts of 1-amino-naphthalene- 7 - sulfonic acid combined. After the coupling is complete, the dye is further diazotized and the diazo compound is combined in acetic acid solution with 15 parts of 1-Amino-2.5-@dimethoxy- @benzene. The dye is separated and:

  further diazotized by stirring with ice and hydrochloric acid and adding a solution of sodium nitrite.



  The diazo suspension is combined at 0-5 with an isadaalka.lis: chen solution of 22.4 parts of 2-naphthol-6-sulfonic acid, the addition of pyridine being advantageous.

Claims (1)

PATENTANSPRUCH: Verfahren. zur Herstellung eines Trisazo- farbstoffes-, :dadurch ;gekennzeichnet, dass man 1-Diazo-4-oxybenzod-3-earbonsäure in .saurem Medinzm mit 1-Amina-naphthalin-7-sulfon- säure vereinigt, : PATENT CLAIM: Process. for the preparation of a trisazo dye,: characterized in that 1-diazo-4-oxybenzod-3-carboxylic acid is combined with 1-aminonaphthalene-7-sulfonic acid in acidic medicine: den so erhakenen Aminoazo- farbstoff diazotiert, dis Diazoverbindung in saurem Medium mit 1-Amino-2.5-,dimethogy- benzol vereinigt, wieder diazotiert und die Diazoverbinchng des so erhaltenen Amino- disazofarbstoffes, the aminoazo dye obtained in this way is diazotized, the diazo compound is combined in an acidic medium with 1-amino-2,5-, dimethogybenzene, diazotized again and the diazo compound of the amino-disazo dye thus obtained, in alkalischem Medium mit 2-Naphthol-6-sulfonsäure vereinigt. Der so erhaltene Trisazofarbstoff ist ein dunkles Pulver, das sich in Wasser mit ,dunkelvioletter, in Schwefelsäure mit edunkel- grüner Farbe löst, und färbt Baumwolle in grünstichig graublauen, lichtechten Tönen. combined in an alkaline medium with 2-naphthol-6-sulfonic acid. The trisazo dye obtained in this way is a dark powder which dissolves in water with a dark purple color, in sulfuric acid with a dark green color, and dyes cotton in greenish gray-blue, lightfast shades. Die Färbungen werden durch Nachbehandeln mit Chromi- oder Kupfersalzen etwas röter und sehr waschecht. After treatment with chromium or copper salts, the colors become a little redder and very washable.
CH235451D 1942-06-02 1943-05-14 Process for the preparation of a trisazo dye. CH235451A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE235451X 1942-06-02
CH231710T 1943-05-14

Publications (1)

Publication Number Publication Date
CH235451A true CH235451A (en) 1944-11-30

Family

ID=25727622

Family Applications (1)

Application Number Title Priority Date Filing Date
CH235451D CH235451A (en) 1942-06-02 1943-05-14 Process for the preparation of a trisazo dye.

Country Status (1)

Country Link
CH (1) CH235451A (en)

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