CH174266A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH174266A
CH174266A CH174266DA CH174266A CH 174266 A CH174266 A CH 174266A CH 174266D A CH174266D A CH 174266DA CH 174266 A CH174266 A CH 174266A
Authority
CH
Switzerland
Prior art keywords
mol
diazotized
azo dye
nitro
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 CH174266A publication Critical patent/CH174266A/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
    • C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
    • C09B33/18—Trisazo or higher polyazo dyes
    • C09B33/24—Trisazo dyes of the type
    • 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
    • C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
    • C09B33/18—Trisazo or higher polyazo dyes
    • C09B33/30—Tetrazo dyes of the type

Landscapes

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

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 170089.    Verfahren zur Herstellung eines     Azofarbstoffes.       Gemäss dem im Hauptpatent beschriebe  nen Verfahren erhält man einen wertvollen       Azofarbstoff,    wenn man 1     Mol        1-Amino-8-          oxyiiaphtlialin-3.6-disulfosäure        diazotiert,

      die       Diazoverbindung    mit 1     Mol        1.3-Dioxybenzol     in alkalischer Lösung kuppelt und den so  erhaltenen     Monoazofarbstoff    mit 2     Mol        diazo-          tiertem    2 -     Nitro    - l . 4 -     diaminobenzol    weiter  kuppelt.  



  Wie nun weiter gefunden wurde, erhält       mau    einen Leder in rotstickig graubraunen  Tönen färbenden Farbstoff, wenn man den  zunächst erhaltenen     Monoazofarbstoff    mit  1     Mol        diazotiertem        2-Nitro-1.4-diaminoberizol     und 1     Mol        diazotierter        4-Nitro-l-aminobenzol-          2-sulfosäure    kuppelt.  



  <I>Beispiel:</I>  48,4 Teile des     Monoazofarbstoffes    aus       diazotierter        1-Amino-8-oxynaphthaliii-3.6-          disulfosäure    und     1.3-Dioxybenzol        werdet)    in  1000 Teilen Wasser und 8 Teilen Natrium  hydroxyd gelöst. 19 Teile salzsaures     2-Nitro-          1.4-diaminobenzol    werden in der üblichen  Weise     diazotiert.    Die Lösung der     Diazover-          bindung    läuft bei<B>100</B> zu der des Monoazo-         farbstoffes    gleichzeitig mit 6 Teilen Natrium  hydroxyd gelöst in 100 Teilen Wasser.

   Nach  etwa einer     Stunde    lässt man die aus 21,8 Teilen       4-Nitro-i-aminobenzol-2-sulfosäure    bereitete       Diazoverbindung    mit 6 Teilen Natrium  hydroxyd, in 100 Teilen Wasser gelöst, ein  laufen. Der Farbstoff wird, wie üblich, ab  geschieden und aufgearbeitet, er färbt Leder       rotstichig    graubraun.



  <B> Additional patent </B> to main patent no. 170089. Process for the production of an azo dye. According to the process described in the main patent, a valuable azo dye is obtained if 1 mole of 1-amino-8-oxyiiaphtlialin-3,6-disulfonic acid is diazotized,

      the diazo compound is coupled with 1 mol of 1,3-dioxybenzene in alkaline solution and the monoazo dye thus obtained is coupled with 2 mol of diazotized 2-nitro-1. 4 - diaminobenzene further couples.



  As has now been found, a leather is obtained in red-embroidered gray-brown tones if the initially obtained monoazo dye is coupled with 1 mol of diazotized 2-nitro-1,4-diaminoberizole and 1 mol of diazotized 4-nitro-1-aminobenzene-2-sulfonic acid .



  <I> Example: </I> 48.4 parts of the monoazo dye from diazotized 1-amino-8-oxynaphthalene-3.6-disulfonic acid and 1.3-dioxybenzene are dissolved in 1000 parts of water and 8 parts of sodium hydroxide. 19 parts of hydrochloric acid 2-nitro-1,4-diaminobenzene are diazotized in the usual way. The solution of the diazo compound runs at <B> 100 </B> to that of the monoazo dye simultaneously with 6 parts of sodium hydroxide dissolved in 100 parts of water.

   After about an hour, the diazo compound, prepared from 21.8 parts of 4-nitro-i-aminobenzene-2-sulfonic acid, is run in with 6 parts of sodium hydroxide, dissolved in 100 parts of water. The dye is, as usual, separated and worked up, it dyes leather with a reddish gray-brown.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man 1 Mol 1-Amirio-8-oxynaphthalin-3.6-disulfo- säure diazotiert, PATENT CLAIM: Process for the production of an azo dye, characterized in that 1 mol of 1-aminio-8-oxynaphthalene-3,6-disulfonic acid is diazotized, die Diazoverbindung mit 1 Mol 1.3-Dioxyberizol in alkalischer Lösung kuppelt und den so erhaltenen Monoazofarb- stoff mit 1 Mol diazotiertem 2-Nitro-1.4- diaminoberizol und 1 Mol diazotierter 4-Nitro- 1-aininoberizol-2-sulfosätire kuppelt. Der erhaltene Azofarbstoff färbt Leder rotstichig graubraun. the diazo compound is coupled with 1 mol of 1,3-dioxyberizole in alkaline solution and the monoazo dye thus obtained is coupled with 1 mol of diazotized 2-nitro-1,4-diaminoberizole and 1 mol of diazotized 4-nitro-1-aininoberizole-2-sulfosate. The azo dye obtained gives leather a reddish gray-brown color.
CH174266D 1934-04-09 1934-04-09 Process for the preparation of an azo dye. CH174266A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH174266T 1934-04-09
CH170089T 1934-04-09

Publications (1)

Publication Number Publication Date
CH174266A true CH174266A (en) 1934-12-31

Family

ID=25718847

Family Applications (1)

Application Number Title Priority Date Filing Date
CH174266D CH174266A (en) 1934-04-09 1934-04-09 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH174266A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4988804A (en) * 1987-11-10 1991-01-29 Ciba-Geigy Corporation Polyazo dyes obtained by successive coupling of H-acid and two further anilinic diazo components on resorcinol or the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4988804A (en) * 1987-11-10 1991-01-29 Ciba-Geigy Corporation Polyazo dyes obtained by successive coupling of H-acid and two further anilinic diazo components on resorcinol or the like

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