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CH278474A - Process for the preparation of a cobalt-containing disazo dye. - Google Patents

Process for the preparation of a cobalt-containing disazo dye.

Info

Publication number
CH278474A
CH278474A CH278474DA CH278474A CH 278474 A CH278474 A CH 278474A CH 278474D A CH278474D A CH 278474DA CH 278474 A CH278474 A CH 278474A
Authority
CH
Switzerland
Prior art keywords
cobalt
dye
disazo dye
oxynaphthalene
amino
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Sandoz
Original Assignee
Ag Sandoz
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 Ag Sandoz filed Critical Ag Sandoz
Publication of CH278474A publication Critical patent/CH278474A/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
    • C09B45/00—Complex metal compounds of azo dyes
    • C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/24—Disazo or polyazo compounds
    • C09B45/30—Disazo or polyazo compounds containing cobalt

Landscapes

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

Description

  

  <B>Zusatzpatent</B>     zum    Hauptpatent Nr. 274242.    Verfahren zur Herstellung eines     kobalthaltigen        Disazofarbstoffes.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines Farb  stoffes, das     dadureh        gekennzeiehnet    ist, dass  man die     Diazoverbindung    aus 1     Mol        2-Amino-          1-oxybenzol-4-sulfonsäure    mit 1     Mo1    1-Amino-         8-oxynaphthalin-3,6-disulfonsäure    kuppelt,  den erhaltenen     Aminoazofarbstoff        diazotiert,

       mit 1     Mol.        2-Oxynaphthalin-6-sulfon.säure    zum       Disazofarbstoff    der Zusammensetzung  
EMI0001.0017     
    vereinigt und diesen mit Kobalt abgebenden  Mitteln behandelt.  



  lm     naelifolgenden    Beispiel sind die Teile  G     ewiehtsteile.     



       Beispiel:     18,9 Teile     2-Amino-l-oxybenzol-4-sulfon-          säure    werden mit verdünnter Salzsäure und  6,9 Teilen     Natriumnitrit        diazotiert    und mit.

    einer eiskalten, stark     sodaalkalisehen    Lösung  von 31,9 Teilen     1-Amino-8-oxynaphthalin-3,6-          disulfonsäure    vereinigt.     Naeh    beendeter Kupp  lung wird der entstandene     Aminoazofarbstoff     isoliert, zur     Weiterdiazotierung    in Wasser ge  löst,     finit    6,9 Teilen     Natrittmnitrit    versetzt und  dieses     Gemiseh    langsam zu einer     Misehung    aus  verdünnter Salzsäure     Lind    Eis gegossen.

   Hier  auf wird mit. 22,4 Teilen     2-Oxy-naphthalin-6-          sulfonsäure    in Gegenwart von Soda gekup-         pelt.    Der auf     übliehe    Weise isolierte     Disazo-          farbstoff    wird mehrere Stunden in Gegen  wart von     Natriuinaeetat    in einer     wässrigen     Lösung von 30 Teilen     Kobaltsulfat    auf 90 bis  95  C ei-wärmt. Der neue Farbstoff enthält  komplexgebundenes Kobalt und färbt Leder  in grauen Tönen von     ausgezeiehneter        Lieht-          eehtheit.  



  <B> Additional patent </B> to main patent no. 274242. Process for the production of a cobalt-containing disazo dye. The subject of the present patent is a process for the production of a dye which is marked dadureh that the diazo compound from 1 mol of 2-amino-1-oxybenzene-4-sulfonic acid with 1 mol of 1-amino-8-oxynaphthalene-3,6 -disulfonic acid couples, diazotizes the aminoazo dye obtained,

       with 1 mole of 2-oxynaphthalene-6-sulfonic acid to form the disazo dye of the composition
EMI0001.0017
    united and treated this with cobalt releasing agents.



  In the example below, the parts are weight parts.



       Example: 18.9 parts of 2-amino-1-oxybenzene-4-sulfonic acid are diazotized with dilute hydrochloric acid and 6.9 parts of sodium nitrite and mixed with.

    an ice-cold, strongly alkaline soda solution of 31.9 parts of 1-amino-8-oxynaphthalene-3,6-disulfonic acid combined. After coupling is complete, the aminoazo dye formed is isolated, dissolved in water for further diazotization, 6.9 parts of sodium mnitrite are added and this mixture is slowly poured into a mixture of dilute hydrochloric acid and ice.

   Here on is with. 22.4 parts of 2-oxynaphthalene-6-sulfonic acid coupled in the presence of soda. The disazo dye isolated in the customary manner is heated to 90 to 95 ° C. in an aqueous solution of 30 parts of cobalt sulfate for several hours in the presence of sodium acetate. The new dye contains complex-bound cobalt and dyes leather in gray tones with excellent lightness.

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines kobalt- haltigen Disazofarbstoffes, dadureb. gekenn- zeiehnet, dass man die Diazoverbindung aus 1 Mol ?-Amino-l-oxybenzol-4-sul.fonsäure mit 1. PATENT CLAIM Process for the production of a cobalt-containing disazo dye, dadureb. it is indicated that the diazo compound can be obtained from 1 mol? -amino-1-oxybenzene-4-sulphonic acid with 1. 11o1 1-Amino-8-oxynaphthalin-3,6-disulfon- säure kuppelt, den erhaltenen Aminoazofarb- stoff diazotiert, mit 1 11o1 2-Oxynaphthalin-6- sulfonsäure zum Disazofarbstoff der Zusam inensetzung EMI0002.0001 i-ereinigt und diesen mit. Kobalt abgebenden Mitteln behandelt. Der neue Farbstoff färbt Leder in grauen Tönen von aus-ezeiehneter Liehtechtheit. 11o1 1-amino-8-oxynaphthalene-3,6-disulphonic acid couples, diazotizes the resulting aminoazo dye, with 11o1 2-oxynaphthalene-6-sulphonic acid to form the disazo dye of the composition EMI0002.0001 i-cleaned and this with. Treated cobalt releasing agents. The new dye dyes leather in gray tones with excellent lightfastness.
CH278474D 1949-04-14 1949-04-14 Process for the preparation of a cobalt-containing disazo dye. CH278474A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH278474T 1949-04-14
CH274242T 1949-04-14

Publications (1)

Publication Number Publication Date
CH278474A true CH278474A (en) 1951-10-15

Family

ID=25731538

Family Applications (1)

Application Number Title Priority Date Filing Date
CH278474D CH278474A (en) 1949-04-14 1949-04-14 Process for the preparation of a cobalt-containing disazo dye.

Country Status (1)

Country Link
CH (1) CH278474A (en)

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