CH174268A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH174268A
CH174268A CH174268DA CH174268A CH 174268 A CH174268 A CH 174268A CH 174268D A CH174268D A CH 174268DA CH 174268 A CH174268 A CH 174268A
Authority
CH
Switzerland
Prior art keywords
azo dye
parts
sulfonic acid
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 CH174268A publication Critical patent/CH174268A/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

Landscapes

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

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 170089.    Verfahren zur Herstellung eines     Azofarbstoffes.       Gemäss dem im Hauptpatent beschriebenen  Verfahren erhält     man    einen wertvollen     Azo-          farbstoff,    wenn man 1     Mol        1-Amino-8-oxy-          naphtlialin-3.6-disulfosäure    dianotiert,

   die       Diazoverbindung    mit 1     Mol        1.3-Dioxybenzol     in alkalischer Lösung kuppelt und den so  erhaltenen     Morioazofai-bstoff    mit 2     Mol    diano  tiertem 2 -     Niti-o    - 1. 4 - d     iamirioberizol    weiter  kuppelt. .  



  Wie nun weiter gefunden wurde, erhält  man einen Leder dunkelrotbraun anfärbenden  Farbstoff, wenn man den aus dianotierter       1-Amino-8-oxynaphthaliir-4-sulfosäure    durch  Kuppeln mit     1.3-Dioxyberizol        erhältliehen          Monoazofarbstoff    mit 1     Mol    dianotiertem     2-          Niti-o-1.4-diaminobenzol    und 1     Mol    dianotier  ter     4-Nitro-4'-amiriodiphenylamin-2-sulfosäure     weiter kuppelt.

      <I>Beispiel:</I>  30,2 Teile des     Monoazofarbstoffes    aus di  anotierter     1-Amino-8-oxynaphthalin-4-sulfo-          säure    und     Resorcin    werden in 1000 Teilen  Wasser unter Zusatz von 8 Teilen Natrium  hydroxyd gelöst. 19 Teile salzsaures     2-Nitro-          I:4-diamiriobenzol    werden in der üblichen  Weise dianotiert. Die Lösung der Diazover-         bindung    läuft bei 10  zu der des     Monoazo-          farbstoffes    gleichzeitig mit 6 Teilen Natrium  hydroxyd, gelöst in 100 Teilen Wasser.

   Zu  dem Reaktionsprodukt lässt man nach etwa  1 Stunde die aus 30,9 Teilen     4-Nitro-4'-amino-          diphenylamin-2-sulfosäure    erhältliche     Diazo-          verbindung    gleichzeitig mit 6 Teilen Natrium  hydroxyd, in 100 Teilen Wasser gelöst, zu  laufen. Der Farbstoff wird in der üblichen  Weise aufgearbeitet. Er färbt Leder dunkel  rotbraun.



      Additional patent 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-oxynaphthalene-3,6-disulfonic acid is dianotated,

   the diazo compound is coupled with 1 mol of 1,3-dioxybenzene in alkaline solution and the morioazofa-bstoff thus obtained is further coupled with 2 mol of diano-tated 2-niti-o-1.4-diamirioberizole. .



  As has now been found further, a leather dye that stains dark red-brown is obtained if the monoazo dye obtained from dianotated 1-amino-8-oxynaphthalene-4-sulfonic acid by coupling with 1,3-dioxyberizole with 1 mol of dianotated 2-Niti-o-1.4- diaminobenzene and 1 mole of dianotier 4-nitro-4'-amiriodiphenylamine-2-sulfonic acid are further coupled.

      <I> Example: </I> 30.2 parts of the monoazo dye from di-anotized 1-amino-8-oxynaphthalene-4-sulfonic acid and resorcinol are dissolved in 1000 parts of water with the addition of 8 parts of sodium hydroxide. 19 parts of hydrochloric acid 2-nitro-I: 4-diamiriobenzene are dianotized in the usual way. The solution of the diazo compound runs at 10 to that of the monoazo dye simultaneously with 6 parts of sodium hydroxide dissolved in 100 parts of water.

   After about 1 hour, the diazo compound obtainable from 30.9 parts of 4-nitro-4'-aminodiphenylamine-2-sulfonic acid is allowed to run into the reaction product at the same time as 6 parts of sodium hydroxide dissolved in 100 parts of water. The dye is worked up in the usual way. He dyes leather dark red-brown.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man den aus dianotierter 1-Amirio-8-oxyriaphtbalin-4- sulfosäure durch Kuppeln mit 1. 3-Dioxybenzol erhältlichen Monoazofarbstoff mit 1 Mol di anotiertem 2-Nitro-1.4-diaminobenzol und 1 Mol dianotierter 4-Nitro-4'-aminodiphenyl- amin-2-sulfosäure weiter kuppelt. Der erhaltene Azofarbstoff färbt Leder dunkelrotbraun. PATENT CLAIM: A process for the production of an azo dye, characterized in that the monoazo dye obtainable from dianotated 1-amirio-8-oxyriaphtbalin-4-sulfonic acid by coupling with 1,3-dioxybenzene is mixed with 1 mol of di-anotized 2-nitro-1.4- diaminobenzene and 1 mole of dianotized 4-nitro-4'-aminodiphenylamine-2-sulfonic acid further couples. The azo dye obtained dyes leather dark red-brown.
CH174268D 1934-04-09 1934-04-09 Process for the preparation of an azo dye. CH174268A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH174268T 1934-04-09
CH170089T 1934-04-09

Publications (1)

Publication Number Publication Date
CH174268A true CH174268A (en) 1934-12-31

Family

ID=25718849

Family Applications (1)

Application Number Title Priority Date Filing Date
CH174268D CH174268A (en) 1934-04-09 1934-04-09 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH174268A (en)

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