CH296249A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH296249A
CH296249A CH296249DA CH296249A CH 296249 A CH296249 A CH 296249A CH 296249D A CH296249D A CH 296249DA CH 296249 A CH296249 A CH 296249A
Authority
CH
Switzerland
Prior art keywords
azo dye
coupling
dye
wool
preparation
Prior art date
Application number
Other languages
German (de)
Inventor
Farbwerke Hoechst Akt Bruening
Original Assignee
Hoechst 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 Hoechst Ag filed Critical Hoechst Ag
Publication of CH296249A publication Critical patent/CH296249A/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
    • C09B33/28—Tetrazo dyes of the type A->B->K<-C<-D

Landscapes

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

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 238692.    Verfahren zur Herstellung eines     Azofarbstoffes.            Wiegenstand    dieses     Zusatzpatentes    ist ein       Verfahren    zur Herstellung eines     Azofarbstof-          fes,        welehes    darin besteht,

   dass man 2     Mol    der       Diazoverbindung    der     dureh    Kuppeln von di-         azotierter        5-tlmino-2-oxybenzol-l-carbonsäure     mit     1-Aminonaphthalin-7-sulfonsäure    erhält  lichen     Aminoazoverbindung    mit 1     Mol        1-Aeeto-          acetylainino-6-oxynaphthaIin    kuppelt.

      <I>Beispiel:</I>    15,6     Gewiehtsteile        5-Amino-2-oxybenzol-l-          c#arbonsäure    werden     diazotiert.    Die erhaltene       1)iazoniumverbindung    wird mit einer mit.

    einem     f        \bersehuss    von     Natritimacetat    versetzten       Lösung        von        23,2        Gewichtsteilen        (92,8%igen)          1-llminonaphthalin-7-sulfonsä.iire    in Wasser       vereinigt.    Nach Beendigung der Kupplung  wird der     Aminoazofarbstoff    abgeschieden, mit  verdünnter Natronlauge in Lösung gebracht  und nach Zugabe von 6,

  9 Gewichtsteilen Na-         triumnitrit    durch Eintragen in Eis und über  schüssige Salzsäure     diazotiert.    Die erhaltene  Suspension der     Diazoverbindung    wird in eine  Lösung aus 13,3 Gewichtsteilen     1-Aeetoacetyl-          amino-6-oxynaphthalin        (Fp.    145 bis 147 ) in  50     Volumteilen        2n-Natronlauge    mit einem  Überschuss von     Natriumcarbonat    bei Zimmer  temperatur eingetragen.

   Der gebildete     Tetra-          kisazofarbstoff    von der     Zusammensetziuig:     
EMI0001.0047     
    wird nach Zugabe von     Natrinmehloridlösung     ausgefällt. Der Farbstoff erzeugt auf der       Miselifaser    aus Wolle und Zellwolle     naeh    der         Naehbehandlung    mit Metallsalzen, z. B. mit.       Chroinfluorid,    schöne rotbraune Töne von  guter     Echtheit.  



      Additional patent to main patent no. 238692. Process for the production of an azo dye. The cradle of this additional patent is a process for the production of an azo dye, which consists of

   that 2 moles of the diazo compound of the aminoazo compound obtained by coupling diazo-2-oxybenzene-1-carboxylic acid with 1-aminonaphthalene-7-sulfonic acid are coupled with 1 mole of 1-aetoacetylainino-6-oxynaphthalene.

      <I> Example: </I> 15.6 parts by weight of 5-amino-2-oxybenzene-1-c # carboxylic acid are diazotized. The 1) iazonium compound obtained is treated with a.

    a solution of 23.2 parts by weight (92.8%) 1-lminonaphthalene-7-sulfonic acid in water to which an excess of sodium acetate was added. After the coupling is complete, the aminoazo dye is deposited, dissolved with dilute sodium hydroxide solution and, after adding 6,

  9 parts by weight of sodium nitrite diazotized by placing in ice and excess hydrochloric acid. The resulting suspension of the diazo compound is introduced into a solution of 13.3 parts by weight of 1-aetoacetylamino-6-oxynaphthalene (melting point 145 to 147) in 50 parts by volume of 2N sodium hydroxide solution with an excess of sodium carbonate at room temperature.

   The tetrakisazo dye formed has the composition:
EMI0001.0047
    is precipitated after addition of sodium chloride solution. The dye is produced on the miseli fiber made of wool and rayon after sewing with metal salts, e.g. B. with. Chroinfluoride, beautiful red-brown tones of good fastness.

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man 2 31o1 der Diazoverbindung der durch Kup peln von diazotierter 5-Amino-2-ox@#benzol-l- earbonsäure mit l.-Aminonaphthalin-7-sulfon- säure erhältliehen Aminoazov erbindung mit 1 --Hol 1- Aeetoaeetplamino - 6 - ozvnaphthalin kuppelt. <B> PATENT CLAIM: </B> Process for the production of an azo dye, characterized in that 2 31o1 of the diazo compound of the 5-amino-2-ox @ # benzene-1-carboxylic acid diazotized by coupling with 1.- Aminonaphthalene-7-sulfonic acid obtained Aminoazov connection with 1 --Hol 1- Aeetoaeetplamino - 6 - ozvnaphthalin coupled. Der Farbstoff färbt Misehfasern aus Wolle und Zellwolle naeh der Naehbehandlung- mit Chromfluorid in sehönen rotbraunen Tönen von guter Eehtheit. _UNTERANSPRUCH: The dye dyes miseh fibers made of wool and viscose wool after sewing - with chromium fluoride in beautiful red-brown tones of good integrity. _ SUBClaim: Verfahren naeh Patentansprueh, dadureh gekemizeiehnet, da.ss man die Kupplung in Gegenwart eines I'bersehusses von Natrinm- carbonat vornimmt. Method according to patent claim, which means that the coupling is carried out in the presence of an excess of sodium carbonate.
CH296249D 1943-04-17 1944-03-21 Process for the preparation of an azo dye. CH296249A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE296249X 1943-04-17
CH238692T 1944-03-21

Publications (1)

Publication Number Publication Date
CH296249A true CH296249A (en) 1954-01-31

Family

ID=25728334

Family Applications (1)

Application Number Title Priority Date Filing Date
CH296249D CH296249A (en) 1943-04-17 1944-03-21 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH296249A (en)

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