CH222135A - Process for the preparation of a 1,1'-dioxyazo dye. - Google Patents

Process for the preparation of a 1,1'-dioxyazo dye.

Info

Publication number
CH222135A
CH222135A CH222135DA CH222135A CH 222135 A CH222135 A CH 222135A CH 222135D A CH222135D A CH 222135DA CH 222135 A CH222135 A CH 222135A
Authority
CH
Switzerland
Prior art keywords
dye
dioxyazo
preparation
concentrated
water
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz A G
Original Assignee
Sandoz 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 Sandoz Ag filed Critical Sandoz Ag
Publication of CH222135A publication Critical patent/CH222135A/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
    • C09B45/14—Monoazo compounds
    • C09B45/16—Monoazo compounds containing chromium

Landscapes

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

Description

  

      Verfahren    zur     Herstellung    eines     1.1'-Dioxyazofarbstoffes.       Das vorliegende Patent betrifft ein Ver  fahren zur Herstellung eines 1 .     1'-Dioxyazo-          farbstoffes        und    ist dadurch gekennzeichnet,  dass man 3. 4.     6-Trichlor-2-amino-l-oxy-ben-          zol-5-sulfonsäure        diazotiert    und in konzen  triert     ätzalkalischer    Lösung mit     1-Oxynaph-          thalin    vereinigt.

           Beispiel:     58,5 kg 3 . 4 .     6-Trichlor-2-amino-l-oxy-          benzol-5-sulfonsäure    werden in üblicher  Weise so konzentriert als möglich     diazotiert.     Die zum grössten Teil in Form gelber Nadeln  abgeschiedene     Diazoverbindung        wird    bei 0         eingetragen:

      in eine     Aufschlämmung    von       1-Oxynaphthalin-natrium    in     konzentrierter     Natronlauge, welche sich dadurch herstellen  lässt, dass die Lösung von 29 kg     1-Oxynaph-          tbalin    in 20 Liter Wasser und 30 kg 30 %     iger     Natronlauge in eine auf 0   gekühlte Lösung  von 170 kg     Ätznatron    in 280 Liter Wasser  eingerührt wird. Es bildet sich rasch eine  rote Lösung. Nach Beendigung der Kupplung  wird der Farbstoff durch Neutralisieren mit    konzentrierter Salzsäure gefällt und nötigen  falls durch     Umlösen        aus    Wasser gereinigt.  



  Der getrocknete     und    gemahlene Farbstoff  bildet ein     dunkles    Pulver. Es löst sich in  Wasser mit blauer, in konzentrierter Schwe  felsäure mit brauner Farbe und färbt auf  Wolle nach dem     Nachchromierungs-    oder       Einbadchromverfahren    ein schönes Marine  blau von vorzüglichen     Echtheiten.  



      Process for the preparation of a 1,1'-dioxyazo dye. The present patent relates to a method for producing a 1. 1'-dioxyazo dye and is characterized in that 3. 4. 6-trichloro-2-amino-1-oxy-benzene-5-sulfonic acid is diazotized and combined with 1-oxynaphthalene in a concentrated caustic solution .

           Example: 58.5 kg 3. 4th 6-Trichloro-2-amino-1-oxybenzene-5-sulfonic acid are diazotized in the usual way as concentrated as possible. The diazo compound deposited for the most part in the form of yellow needles is entered at 0:

      in a slurry of 1-oxynaphthalene sodium in concentrated sodium hydroxide solution, which can be prepared by dissolving 29 kg of 1-oxynaphthalene in 20 liters of water and 30 kg of 30% sodium hydroxide solution in a solution of 170 kg cooled to 0 Caustic soda is stirred into 280 liters of water. A red solution forms quickly. After the coupling has ended, the dye is precipitated by neutralization with concentrated hydrochloric acid and, if necessary, purified by dissolving from water.



  The dried and ground dye forms a dark powder. It dissolves in water with a blue color, in concentrated sulfuric acid with a brown color and dyes wool a beautiful navy blue with excellent fastness properties using the post-chrome plating or single-bath chrome process.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines 1 . 1'-Di- oxyazofarbstoffes, dadurch gekennzeichnet, dass man 3. 4. 6-Trichlor-2-amino-l-oxy-ben- zol-5-sulfonsäure diazotiert und in konzen triert ätzalkalischer Lösung mit 1-Oxynaph- thalin vereinigt. Der neue Farbstoff stellt ein dunkles Pul ver dar. PATENT CLAIM: Process for the production of a 1st 1'-Dioxyazo dye, characterized in that 3. 4. 6-trichloro-2-amino-1-oxy-benzene-5-sulfonic acid is diazotized and combined with 1-oxynaphthalene in concentrated caustic solution. The new dye is a dark powder. Erlöst sich in Wasser mit blauer, in konzentrierter Schwefelsäure mit brauner Farbe und färbt auf Wolle nach dem Nach- cbromierungs- oder Einbadchromverfahren ein schönes Marineblau von vorzüglichen Echtheiten. Dissolves in water with blue, in concentrated sulfuric acid with brown color and dyes wool a beautiful navy blue with excellent fastness properties using the post-chromating or single-bath chrome process.
CH222135D 1940-02-22 1941-11-18 Process for the preparation of a 1,1'-dioxyazo dye. CH222135A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH218365T 1940-02-22
CH222135T 1941-11-18

Publications (1)

Publication Number Publication Date
CH222135A true CH222135A (en) 1942-06-30

Family

ID=25726149

Family Applications (1)

Application Number Title Priority Date Filing Date
CH222135D CH222135A (en) 1940-02-22 1941-11-18 Process for the preparation of a 1,1'-dioxyazo dye.

Country Status (1)

Country Link
CH (1) CH222135A (en)

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