CH174265A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH174265A
CH174265A CH174265DA CH174265A CH 174265 A CH174265 A CH 174265A CH 174265D A CH174265D A CH 174265DA CH 174265 A CH174265 A CH 174265A
Authority
CH
Switzerland
Prior art keywords
mol
dianotated
azo dye
parts
dye
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 CH174265A publication Critical patent/CH174265A/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     Azofarbstof%s.       Gemäss dem im Hauptpatent beschriebe  nen Verfahren erhält man einen wertvollen       Azofarbstoff,    wenn man 1     Mol        1-Amino-8-          oxynaphthaliri-3.6-disulfosäure    dianotiert, die       Diazoverbindung    mit 1     Mol        1.3-Dioxybenzol     in alkalischer Lösung kuppelt und den so  erhaltenen     Monoazofarbstoff    mit 2     Mol    diano  tiertem     2-Nitro-1.4-diaminobenzol    weiter  kuppelt.  



  Wie nun weiter gefunden wurde, erhält  man einen Leder in graubraunen Tönen fär  benden Farbstoff, wenn man den zunächst  erhaltenen     Monoazofarbstoffmit    1     Mol    diano  tiertem     2-Nitro-1.4-diaminobenzol    und 1     Mol     dianotierter     4-Aminoazobenzol-4'-stilfosäure     weiter     kuppelt.     



       Beispiel:     48,4 Teile des     Monoazofarbstoffes    aus  dianotierter     1-Amino-8-oxynaphthalir)-3.6-          disulfosäure    und     1.3-Dioxybeiizol    werden in  1000 Teilen Wasser und 8 Teilen     Natriurn-          hydroxyd    gelöst. 19 Teile salzsaures     2-Nitro-          1.4-diaminobenzol    werden in der üblichen  Weise dianotiert. Die Lösung der     Diazover-          hindung    läuft bei<B>10'</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 27,7  Teilen     4-Aminoazobenzol-4'-sulfosäure    herge  stellte     Diazoverbindung    gleichzeitig mit 6  Teilen     Natriumhydroxyd,    in 100 Teilen Was  ser gelöst, einlaufen. Nach beendeter Kupplung  wird der Farbstoff aasgesalzen und abgesaugt.  Er bildet ein dunkles Pulver und färbt Leder  graubraun.



  <B> Additional patent </B> to main patent no. 170089. Process for the production of an azo dye% s. According to the process described in the main patent, a valuable azo dye is obtained if 1 mol of 1-amino-8-oxynaphthaliri-3,6-disulfonic acid is dianotated, the diazo compound is coupled with 1 mol of 1,3-dioxybenzene in alkaline solution and the monoazo dye thus obtained is 2 mol diano tated 2-nitro-1,4-diaminobenzene further couples.



  As has now also been found, a leather dyeing gray-brown shades is obtained if the monoazo dye initially obtained is further coupled with 1 mol of dianotated 2-nitro-1,4-diaminobenzene and 1 mol of dianotated 4-aminoazobenzene-4'-stilfonic acid.



       Example: 48.4 parts of the monoazo dye from dianotated 1-amino-8-oxynaphthalir) -3,6-disulfonic acid and 1,3-dioxybeiizole are dissolved in 1000 parts of water and 8 parts of sodium hydroxide. 19 parts of hydrochloric acid 2-nitro-1,4-diaminobenzene are dianotized in the usual way. The solution of the diazo compound runs at <B> 10 '</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 27.7 parts of 4-aminoazobenzene-4'-sulfonic acid is allowed to run in at the same time as 6 parts of sodium hydroxide, dissolved in 100 parts of water. After the coupling has ended, the dye is washed with salt and filtered off with suction. It forms a dark powder and turns leather gray-brown.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man 1 Mol 1-Amino-8-oxynaphthalin-3.6-disulfo- säure dianotiert, die Diazoverbindung reit 1 Mol 1. PATENT CLAIM: Process for the production of an azo dye, characterized in that 1 mol of 1-amino-8-oxynaphthalene-3,6-disulfonic acid is dianotated, the diazo compound equals 1 mol of 1. 3-Dioxybenzol in alkalischer Lösung kuppelt und den so erhaltenen Monoazofarb- stoff mit 1 Mol dianotiertem 2-Nitro-l.4- diaminobenzol und 1 Mol dianotierter 4-Amino- azobenzol-4'-sralfosäure weiter kuppelt. Der erhaltene Azofarbstoff bildet ein dunkles Pulver und färbt Leder graubraun. Coupling 3-dioxybenzene in alkaline solution and coupling the monoazo dye thus obtained with 1 mol of dianotated 2-nitro-1,4-diaminobenzene and 1 mol of dianotated 4-aminoazobenzene-4'-sralfonic acid. The azo dye obtained forms a dark powder and dyes leather gray-brown.
CH174265D 1934-04-09 1934-04-09 Process for the preparation of an azo dye. CH174265A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH170089T 1934-04-09
CH174265T 1934-04-09

Publications (1)

Publication Number Publication Date
CH174265A true CH174265A (en) 1934-12-31

Family

ID=25718846

Family Applications (1)

Application Number Title Priority Date Filing Date
CH174265D CH174265A (en) 1934-04-09 1934-04-09 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH174265A (en)

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