CH230636A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH230636A
CH230636A CH230636DA CH230636A CH 230636 A CH230636 A CH 230636A CH 230636D A CH230636D A CH 230636DA CH 230636 A CH230636 A CH 230636A
Authority
CH
Switzerland
Prior art keywords
acid
condensed
preparation
azo dye
azo
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 CH230636A publication Critical patent/CH230636A/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
    • C09B56/00—Azo dyes containing other chromophoric systems
    • C09B56/04—Stilbene-azo dyes

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 225559.    Verfahren zur Herstellung eines     Azofarbstoffes.            Gegenstand        vorliegender        Erfindung    ist       ein    Verfahren zur     HeTstallung    eines     Azo@farb-          stoffes.    Das     Varfahren        ist    dadurch     gekenn-          zeichnet,    dass     mann        4,4'-Ilinibro3tilben-2,

  2'-          disulfonsäure        in        natronalkalis.cher    Lösung       zunächst    mit 1 Mal     1,4-Diamino-benzol-          eu,fons!äure    bei einer Temperatur     unter    50        kondensiert    und dann mit     einem        weiteren        Mod     1,4 -     D,i@a:minobenzolsulfonsäure    bei höherer  Temperatur zum zweiten Mal kondensiert.  



  Der     neue    Farbstoff stellt ein     dunkles     Pulver dar, das sich in     Wassier    mit     gelber     Farbe löst     und        Baumwolle    in     ,gelben    Tönen       färbt.    Er     soll    vor allem     als        Zwischenprodukt     zum     Aufbau        anderer        Farbstoffe        verwendet     werden.  



  <I>Beispiel:</I>  43     Gewichtsteile        4,4'-Dinitriostilben-2,2'-          d;iisulfons,äure    werden     in        ungefähr    700     Ge-          wichts@teilen    5     %iger        Natronlauige        gelöst,    mit  19     Gewichtsteilen        1,4-Diaminobenz.olsulfon-          eäure        vews,etzt    und     ungefähr    12 Stunden bei         ,einer        Temperatur    von 45  gehalten.

   Dias     aus-          gefallene        und    isolierte     Monokondensations-          produkt        wird    mit weiteren 19     Gewichtsteilen          1,4-D,iamimob,enzolsudf        on.säure        in    750     Ge-          wichtsteiIen    5 %     iger    Natronlauge     etwa    10       Stunden    auf 80-85  erhitzt.

       Nach        diesem     Zeit ist     in    guter     Ausbeute    der     Farbstoff    fol  gender Konstitution ausgefallen:  
EMI0001.0080     




      Additional patent to main patent no. 225559. Process for the production of an azo dye. The present invention relates to a process for the production of an Azo® dye. The method is characterized by the fact that 4,4'-ilinibro3tilbene-2,

  2'-disulfonic acid in natronalkalis.cher solution first condensed with 1,4-diamino-benzenesulfonic acid at a temperature below 50 and then with a further mod 1,4-D, i @ a: minobenzenesulfonic acid condensed for the second time at a higher temperature.



  The new dye is a dark powder that dissolves in water with a yellow color and dyes cotton in yellow tones. It is primarily intended to be used as an intermediate in the synthesis of other dyes.



  <I> Example: </I> 43 parts by weight of 4,4'-dinitriostilbene-2,2'- d; iisulfonic acid are dissolved in about 700 parts by weight of 5% sodium hydroxide, with 19 parts by weight of 1,4- Diaminobenzenesulfonic acid vews, etched, and kept at a temperature of 45 for about 12 hours.

   The precipitated and isolated monocondensation product is heated to 80-85 for about 10 hours with a further 19 parts by weight of 1,4-D, iamimob, enzolsudfon.äure in 750 parts by weight of 5% sodium hydroxide solution.

       After this time, the dye has precipitated in good yield with the following constitution:
EMI0001.0080

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines AzoTarb- stoffes, dadurch gekennzeichnet, ,dass mann 4,4'-Dnitros#tilben-2,2'-diswlfo#ns#äure in na- tronalka-l@is@cher Lösung zunächst mit 1 Mal. 1,4-Diaminobenzolsulfons,äure bei , PATENT CLAIM: A process for the production of an azo carbonaceous substance, characterized in that 4,4'-dnitros # tilbene-2,2'-diswlfo # ns # acid in sodium-alkali solution is initially mixed with once . 1,4-Diaminobenzenesulfons, acid at, einer Tem- porartur unter 50 kondensiert und dann mit einem weiteren Mo l 1,4-Diaminobenzodsu,fon- säure bei höherer Temperatur zum zweiten Mal kondensiert. Der neue Farbstoff stellt ein dunkles Pulver dar, das sich in Wasser mit gelber Farbe löst und Bauamwolle in ,gelben Tönen färbt. condensed at a temperature below 50 and then condensed with a further mol of 1,4-diaminobenzodic acid at a higher temperature for the second time. The new dye is a dark powder that dissolves in water with a yellow color and dyes cotton in yellow tones.
CH230636D 1940-04-29 1941-08-15 Process for the preparation of an azo dye. CH230636A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE230636X 1940-04-29
CH225559T 1941-08-15

Publications (1)

Publication Number Publication Date
CH230636A true CH230636A (en) 1944-01-15

Family

ID=25726913

Family Applications (1)

Application Number Title Priority Date Filing Date
CH230636D CH230636A (en) 1940-04-29 1941-08-15 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH230636A (en)

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